AuroraMiddleware/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2024-12-13 23:00:22 +00:00
Code Issues Packages Projects Releases Wiki Activity
40,788 Commits 334 Branches 1,646 Tags 284 MiB
aad45c8ac3
Commit Graph

1615 Commits

Author SHA1 Message Date
Florian Weimer
e826574c98 x86: Make strncmp usable from rtld 
Due to the way the conditions were written, the rtld build of strncmp
ended up with no definition of the strncmp symbol at all: The
implementations were renamed for use within an IFUNC resolver, but the
IFUNC resolver itself was missing (because rtld does not use IFUNCs).

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
 2018-06-12 15:00:33 +02:00
H.J. Lu
67c0579669 Mark _init and _fini as hidden [BZ #23145] 
_init and _fini are special functions provided by glibc for linker to
define DT_INIT and DT_FINI in executable and shared library.  They
should never be put in dynamic symbol table.  This patch marks them as
hidden to remove them from dynamic symbol table.

Tested with build-many-glibcs.py.

	[BZ #23145]
	* elf/Makefile (tests-special): Add $(objpfx)check-initfini.out.
	($(all-built-dso:=.dynsym): New target.
	(common-generated): Add $(all-built-dso:$(common-objpfx)%=%.dynsym).
	($(objpfx)check-initfini.out): New target.
	(generated): Add check-initfini.out.
	* scripts/check-initfini.awk: New file.
	* sysdeps/aarch64/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/alpha/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/arm/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/hppa/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/i386/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/ia64/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/m68k/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/microblaze/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/mips/mips32/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/mips/mips64/n32/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/mips/mips64/n64/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/nios2/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/powerpc/powerpc32/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/powerpc/powerpc64/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/s390/s390-32/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/s390/s390-64/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/sh/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/sparc/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
	* sysdeps/x86_64/crti.S (_init): Mark as hidden.
	(_fini): Likewise.
 2018-06-08 10:28:52 -07:00
Florian Weimer
e02c026f38 math: Update i686 ulps (--disable-multi-arch configuration) 
The results are from configuring with --disable-multi-arch,  building
with “-march=x86-64 -mtune=generic -mfpmath=sse” and running the
testsuite on a Haswell-era CPU.
 2018-06-01 22:37:55 +02:00
Florian Weimer
d8c1927561 math: Update i686 ulps 
The results are from building with “-march=x86-64 -mtune=generic
-mfpmath=sse” and running the testsuite on a Haswell-era CPU.
 2018-06-01 19:32:18 +02:00
Florian Weimer
ed0d698870 i386: Drop -mpreferred-stack-boundary=4 
The flag was a left-over from when the -mpreferred-stack-boundary=2 flag
was removed in commit db290cf592.
 2018-05-22 14:44:14 +02:00
H.J. Lu
0068c08588 nptl: Remove __ASSUME_PRIVATE_FUTEX 
Since __ASSUME_PRIVATE_FUTEX is always defined, this patch removes the
!__ASSUME_PRIVATE_FUTEX paths.

Tested with build-many-glibcs.py.

	* nptl/allocatestack.c (allocate_stack): Remove the
	!__ASSUME_PRIVATE_FUTEX paths.
	* nptl/descr.h (header): Remove the !__ASSUME_PRIVATE_FUTEX path.
	* nptl/nptl-init.c (__pthread_initialize_minimal_internal):
	Likewise.
	* sysdeps/i386/nptl/tcb-offsets.sym (PRIVATE_FUTEX): Removed.
	* sysdeps/powerpc/nptl/tcb-offsets.sym (PRIVATE_FUTEX): Likewise.
	* sysdeps/sh/nptl/tcb-offsets.sym (PRIVATE_FUTEX): Likewise.
	* sysdeps/x86_64/nptl/tcb-offsets.sym (PRIVATE_FUTEX): Likewise.
	* sysdeps/i386/nptl/tls.h: (tcbhead_t): Remve the
	!__ASSUME_PRIVATE_FUTEX path.
	* sysdeps/s390/nptl/tls.h (tcbhead_t): Likewise.
	* sysdeps/sparc/nptl/tls.h (tcbhead_t): Likewise.
	* sysdeps/x86_64/nptl/tls.h (tcbhead_t): Likewise.
	* sysdeps/unix/sysv/linux/i386/lowlevellock.S: Remove the
	!__ASSUME_PRIVATE_FUTEX macros.
	* sysdeps/unix/sysv/linux/lowlevellock-futex.h: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/cancellation.S: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: Likewise.
	* sysdeps/unix/sysv/linux/kernel-features.h
	(__ASSUME_PRIVATE_FUTEX): Removed.
 2018-05-17 04:25:10 -07:00
Joseph Myers
632a6cbe44 Add narrowing divide functions. 
This patch adds the narrowing divide functions from TS 18661-1 to
glibc's libm: fdiv, fdivl, ddivl, f32divf64, f32divf32x, f32xdivf64
for all configurations; f32divf64x, f32divf128, f64divf64x,
f64divf128, f32xdivf64x, f32xdivf128, f64xdivf128 for configurations
with _Float64x and _Float128; __nldbl_ddivl for ldbl-opt.

The changes are mostly essentially the same as for the other narrowing
functions, so the description of those generally applies to this patch
as well.

Tested for x86_64, x86, mips64 (all three ABIs, both hard and soft
float) and powerpc, and with build-many-glibcs.py.

	* math/Makefile (libm-narrow-fns): Add div.
	(libm-test-funcs-narrow): Likewise.
	* math/Versions (GLIBC_2.28): Add narrowing divide functions.
	* math/bits/mathcalls-narrow.h (div): Use __MATHCALL_NARROW.
	* math/gen-auto-libm-tests.c (test_functions): Add div.
	* math/math-narrow.h (CHECK_NARROW_DIV): New macro.
	(NARROW_DIV_ROUND_TO_ODD): Likewise.
	(NARROW_DIV_TRIVIAL): Likewise.
	* sysdeps/ieee754/float128/float128_private.h (__fdivl): New
	macro.
	(__ddivl): Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add fdiv and
	ddiv.
	(CFLAGS-nldbl-ddiv.c): New variable.
	(CFLAGS-nldbl-fdiv.c): Likewise.
	* sysdeps/ieee754/ldbl-opt/Versions (GLIBC_2.28): Add
	__nldbl_ddivl.
	* sysdeps/ieee754/ldbl-opt/nldbl-compat.h (__nldbl_ddivl): New
	prototype.
	* manual/arith.texi (Misc FP Arithmetic): Document fdiv, fdivl,
	ddivl, fMdivfN, fMdivfNx, fMxdivfN and fMxdivfNx.
	* math/auto-libm-test-in: Add tests of div.
	* math/auto-libm-test-out-narrow-div: New generated file.
	* math/libm-test-narrow-div.inc: New file.
	* sysdeps/i386/fpu/s_f32xdivf64.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_f32xdivf64.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_fdiv.c: Likewise.
	* sysdeps/ieee754/float128/s_f32divf128.c: Likewise.
	* sysdeps/ieee754/float128/s_f64divf128.c: Likewise.
	* sysdeps/ieee754/float128/s_f64xdivf128.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_ddivl.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_f64xdivf128.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_fdivl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_ddivl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_fdivl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_ddivl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_fdivl.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-ddiv.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-fdiv.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_ddivl.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_fdiv.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_fdivl.c: Likewise.
	* sysdeps/powerpc/fpu/libm-test-ulps: Update.
	* sysdeps/mach/hurd/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/riscv/rv64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
 2018-05-17 00:40:52 +00:00
Joseph Myers
69a01461ee Add narrowing multiply functions. 
This patch adds the narrowing multiply functions from TS 18661-1 to
glibc's libm: fmul, fmull, dmull, f32mulf64, f32mulf32x, f32xmulf64
for all configurations; f32mulf64x, f32mulf128, f64mulf64x,
f64mulf128, f32xmulf64x, f32xmulf128, f64xmulf128 for configurations
with _Float64x and _Float128; __nldbl_dmull for ldbl-opt.

The changes are mostly essentially the same as for the narrowing add
functions, so the description of those generally applies to this patch
as well.  f32xmulf64 for i386 cannot use precision control as used for
add and subtract, because that would result in double rounding for
subnormal results, so that uses round-to-odd with long double
intermediate result instead.  The soft-fp support involves adding a
new FP_TRUNC_COOKED since soft-fp multiplication uses cooked inputs
and outputs.

Tested for x86_64, x86, mips64 (all three ABIs, both hard and soft
float) and powerpc, and with build-many-glibcs.py.

	* math/Makefile (libm-narrow-fns): Add mul.
	(libm-test-funcs-narrow): Likewise.
	* math/Versions (GLIBC_2.28): Add narrowing multiply functions.
	* math/bits/mathcalls-narrow.h (mul): Use __MATHCALL_NARROW.
	* math/gen-auto-libm-tests.c (test_functions): Add mul.
	* math/math-narrow.h (CHECK_NARROW_MUL): New macro.
	(NARROW_MUL_ROUND_TO_ODD): Likewise.
	(NARROW_MUL_TRIVIAL): Likewise.
	* soft-fp/op-common.h (FP_TRUNC_COOKED): Likewise.
	* sysdeps/ieee754/float128/float128_private.h (__fmull): New
	macro.
	(__dmull): Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add fmul and
	dmul.
	(CFLAGS-nldbl-dmul.c): New variable.
	(CFLAGS-nldbl-fmul.c): Likewise.
	* sysdeps/ieee754/ldbl-opt/Versions (GLIBC_2.28): Add
	__nldbl_dmull.
	* sysdeps/ieee754/ldbl-opt/nldbl-compat.h (__nldbl_dmull): New
	prototype.
	* manual/arith.texi (Misc FP Arithmetic): Document fmul, fmull,
	dmull, fMmulfN, fMmulfNx, fMxmulfN and fMxmulfNx.
	* math/auto-libm-test-in: Add tests of mul.
	* math/auto-libm-test-out-narrow-mul: New generated file.
	* math/libm-test-narrow-mul.inc: New file.
	* sysdeps/i386/fpu/s_f32xmulf64.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_f32xmulf64.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_fmul.c: Likewise.
	* sysdeps/ieee754/float128/s_f32mulf128.c: Likewise.
	* sysdeps/ieee754/float128/s_f64mulf128.c: Likewise.
	* sysdeps/ieee754/float128/s_f64xmulf128.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_dmull.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_f64xmulf128.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_fmull.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_dmull.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_fmull.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_dmull.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_fmull.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-dmul.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-fmul.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_dmull.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_fmul.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_fmull.c: Likewise.
	* sysdeps/powerpc/fpu/libm-test-ulps: Update.
	* sysdeps/mach/hurd/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/riscv/rv64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
 2018-05-16 00:05:28 +00:00
H.J. Lu
a15529fda8 i386: Replace PREINIT_FUNCTION@PLT with *%eax in call 
Since we have loaded address of PREINIT_FUNCTION into %eax, we can
avoid extra branch to PLT slot.

	* sysdeps/i386/crti.S (_init): Replace PREINIT_FUNCTION@PLT
	with *%eax in call.

Acked-by: Christian Brauner (Ubuntu) <christian@brauner.io>
 2018-05-14 09:24:06 -07:00
H.J. Lu
98ee36c7a4 x86: Add sysdeps/x86/ldsodefs.h 
Merge sysdeps/i386/ldsodefs.h and sysdeps/x86_64/ldsodefs.h into
sysdeps/x86/ldsodefs.h.

Tested on i686 and x86-64.

	* sysdeps/i386/ldsodefs.h: Removed.
	* sysdeps/x86_64/ldsodefs.h: Moved to ...
	* sysdeps/x86/ldsodefs.h: This.
	(La_i86_regs): New.
	(La_i86_retval): Likewise.
	(ARCH_PLTENTER_MEMBERS): Add i86_gnu_pltenter.
	(ARCH_PLTEXIT_MEMBERS): i86_gnu_pltexit.

Acked-by: Christian Brauner (Ubuntu) christian@brauner.io
 2018-05-14 09:19:41 -07:00
Joseph Myers
b4d5b8b021 Do not include math-barriers.h in math_private.h. 
This patch continues the math_private.h cleanup by stopping
math_private.h from including math-barriers.h and making the users of
the barrier macros include the latter header directly.  No attempt is
made to remove any math_private.h includes that are now unused, except
in strtod_l.c where that is done to avoid line number changes in
assertions, so that installed stripped shared libraries can be
compared before and after the patch.  (I think the floating-point
environment support in math_private.h should also move out - some
architectures already have fenv_private.h as an architecture-internal
header included from their math_private.h - and after moving that out
might be a better time to identify unused math_private.h includes.)

Tested for x86_64 and x86, and tested with build-many-glibcs.py that
installed stripped shared libraries are unchanged by the patch.

	* sysdeps/generic/math_private.h: Do not include
	<math-barriers.h>.
	* stdlib/strtod_l.c: Include <math-barriers.h> instead of
	<math_private.h>.
	* math/fromfp.h: Include <math-barriers.h>.
	* math/math-narrow.h: Likewise.
	* math/s_nextafter.c: Likewise.
	* math/s_nexttowardf.c: Likewise.
	* sysdeps/aarch64/fpu/s_llrint.c: Likewise.
	* sysdeps/aarch64/fpu/s_llrintf.c: Likewise.
	* sysdeps/aarch64/fpu/s_lrint.c: Likewise.
	* sysdeps/aarch64/fpu/s_lrintf.c: Likewise.
	* sysdeps/i386/fpu/s_nextafterl.c: Likewise.
	* sysdeps/i386/fpu/s_nexttoward.c: Likewise.
	* sysdeps/i386/fpu/s_nexttowardf.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_atan2.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_atanh.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_exp.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_exp2.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_j0.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_sqrt.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_expm1.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_fma.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_fmaf.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_log1p.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_nearbyint.c: Likewise.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_nearbyint.c: Likewise.
	* sysdeps/ieee754/flt-32/e_atanhf.c: Likewise.
	* sysdeps/ieee754/flt-32/e_j0f.c: Likewise.
	* sysdeps/ieee754/flt-32/s_expm1f.c: Likewise.
	* sysdeps/ieee754/flt-32/s_log1pf.c: Likewise.
	* sysdeps/ieee754/flt-32/s_nearbyintf.c: Likewise.
	* sysdeps/ieee754/flt-32/s_nextafterf.c: Likewise.
	* sysdeps/ieee754/k_standardl.c: Likewise.
	* sysdeps/ieee754/ldbl-128/e_asinl.c: Likewise.
	* sysdeps/ieee754/ldbl-128/e_expl.c: Likewise.
	* sysdeps/ieee754/ldbl-128/e_powl.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_fmal.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_nearbyintl.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_nextafterl.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_nexttoward.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_nexttowardf.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_asinl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_fmal.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_nexttoward.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_nexttowardf.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_rintl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/e_atanhl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/e_j0l.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_fma.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_fmal.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_nexttoward.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_nexttowardf.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/s_nexttowardfd.c: Likewise.
	* sysdeps/m68k/m680x0/fpu/s_nextafterl.c: Likewise.
 2018-05-11 15:11:38 +00:00
Joseph Myers
9ed2e15ff4 Move math_opt_barrier, math_force_eval to separate math-barriers.h. 
This patch continues cleaning up math_private.h by moving the
math_opt_barrier and math_force_eval macros to a separate header
math-barriers.h.

At present, those macros are inside a "#ifndef math_opt_barrier" in
math_private.h to allow architectures to override them and then use
a separate math-barriers.h header, no such #ifndef or #include_next is
needed; architectures just have their own alternative version of
math-barriers.h when providing their own optimized versions that avoid
going through memory unnecessarily.  The generic math-barriers.h has a
comment added to document these two macros.

In this patch, math_private.h is made to #include <math-barriers.h>,
so files using these macros do not need updating yet.  That is because
of uses of math_force_eval in math_check_force_underflow and
math_check_force_underflow_nonneg, which are still defined in
math_private.h.  Once those are moved out to a separate header, that
separate header can be made to include <math-barriers.h>, as can the
other files directly using these barrier macros, and then the include
of <math-barriers.h> from math_private.h can be removed.

Tested for x86_64 and x86.  Also tested with build-many-glibcs.py that
installed stripped shared libraries are unchanged by this patch.

	* sysdeps/generic/math-barriers.h: New file.
	* sysdeps/generic/math_private.h [!math_opt_barrier]
	(math_opt_barrier): Move to math-barriers.h.
	[!math_opt_barrier] (math_force_eval): Likewise.
	* sysdeps/aarch64/fpu/math-barriers.h: New file.
	* sysdeps/aarch64/fpu/math_private.h (math_opt_barrier): Move to
	math-barriers.h.
	(math_force_eval): Likewise.
	* sysdeps/alpha/fpu/math-barriers.h: New file.
	* sysdeps/alpha/fpu/math_private.h (math_opt_barrier): Move to
	math-barriers.h.
	(math_force_eval): Likewise.
	* sysdeps/x86/fpu/math-barriers.h: New file.
	* sysdeps/i386/fpu/fenv_private.h (math_opt_barrier): Move to
	math-barriers.h.
	(math_force_eval): Likewise.
	* sysdeps/m68k/m680x0/fpu/math_private.h: Move to....
	* sysdeps/m68k/m680x0/fpu/math-barriers.h: ... here.  Adjust
	multiple-include guard for rename.
	* sysdeps/powerpc/fpu/math-barriers.h: New file.
	* sysdeps/powerpc/fpu/math_private.h (math_opt_barrier): Move to
	math-barriers.h.
	(math_force_eval): Likewise.
 2018-05-09 19:45:47 +00:00
Joseph Myers
aaee3cd88e Move math_narrow_eval to separate math-narrow-eval.h. 
This patch continues cleaning up the math_private.h header, which
contains lots of different definitions many of which are only needed
by a limited subset of files using that header (and some of which are
overridden by architectures that only want to override selected parts
of the header), by moving the math_narrow_eval macro out to a separate
math-narrow-eval.h header, only included by those files that need it.
That header is placed in include/ (since it's used in stdlib/, not
just files built in math/, but no sysdeps variants are needed at
present).

Tested for x86_64, and with build-many-glibcs.py.  (Installed stripped
shared libraries change because of line numbers in assertions in
strtod_l.c.)

	* include/math-narrow-eval.h: New file.  Contents moved from ....
	* sysdeps/generic/math_private.h: ... here.
	(math_narrow_eval): Remove macro.  Moved to math-narrow-eval.h.
	[FLT_EVAL_METHOD != 0] (excess_precision): Likewise.
	* math/s_fdim_template.c: Include <math-narrow-eval.h>.
	* stdlib/strtod_l.c: Likewise.
	* sysdeps/i386/fpu/s_f32xaddf64.c: Likewise.
	* sysdeps/i386/fpu/s_f32xsubf64.c: Likewise.
	* sysdeps/i386/fpu/s_fdim.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_cosh.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_gamma_r.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_j1.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_jn.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_lgamma_r.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_sinh.c: Likewise.
	* sysdeps/ieee754/dbl-64/gamma_productf.c: Likewise.
	* sysdeps/ieee754/dbl-64/k_rem_pio2.c: Likewise.
	* sysdeps/ieee754/dbl-64/lgamma_neg.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_erf.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_llrint.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_lrint.c: Likewise.
	* sysdeps/ieee754/flt-32/e_coshf.c: Likewise.
	* sysdeps/ieee754/flt-32/e_exp2f.c: Likewise.
	* sysdeps/ieee754/flt-32/e_expf.c: Likewise.
	* sysdeps/ieee754/flt-32/e_gammaf_r.c: Likewise.
	* sysdeps/ieee754/flt-32/e_j1f.c: Likewise.
	* sysdeps/ieee754/flt-32/e_jnf.c: Likewise.
	* sysdeps/ieee754/flt-32/e_lgammaf_r.c: Likewise.
	* sysdeps/ieee754/flt-32/e_sinhf.c: Likewise.
	* sysdeps/ieee754/flt-32/k_rem_pio2f.c: Likewise.
	* sysdeps/ieee754/flt-32/lgamma_negf.c: Likewise.
	* sysdeps/ieee754/flt-32/s_erff.c: Likewise.
	* sysdeps/ieee754/flt-32/s_llrintf.c: Likewise.
	* sysdeps/ieee754/flt-32/s_lrintf.c: Likewise.
	* sysdeps/ieee754/ldbl-96/gamma_product.c: Likewise.
 2018-05-09 00:15:10 +00:00
Samuel Thibault
81b032c833 Drop fpregset unused symbol exposition 
* sysdeps/arm/sys/ucontext.h: Remove fpregset struct name, unused and
	non-compliant.
	* sysdeps/i386/sys/ucontext.h: Likewise.
	* sysdeps/m68k/sys/ucontext.h: Likewise.
	* sysdeps/mips/sys/ucontext.h: Likewise.
	* sysdeps/unix/sysv/linux/hppa/sys/ucontext.h: Likewise.
 2018-04-20 01:27:13 +02:00
Adhemerval Zanella
243f59e5aa Update i386 libm-test-ulps. 
Updated ulps after recent commit "[PATCH 1/7] sin/cos slow paths:
avoid slow paths for small inputs"
(19a8b9a300).

	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Update.
 2018-04-06 17:24:15 -03:00
Maciej W. Rozycki
10a446ddcc elf: Unify symbol address run-time calculation [BZ #19818] 
Wrap symbol address run-time calculation into a macro and use it
throughout, replacing inline calculations.

There are a couple of variants, most of them different in a functionally
insignificant way.  Most calculations are right following RESOLVE_MAP,
at which point either the map or the symbol returned can be checked for
validity as the macro sets either both or neither.  In some places both
the symbol and the map has to be checked however.

My initial implementation therefore always checked both, however that
resulted in code larger by as much as 0.3%, as many places know from
elsewhere that no check is needed.  I have decided the size growth was
unacceptable.

Having looked closer I realized that it's the map that is the culprit.
Therefore I have modified LOOKUP_VALUE_ADDRESS to accept an additional
boolean argument telling it to access the map without checking it for
validity.  This in turn has brought quite nice results, with new code
actually being smaller for i686, and MIPS o32, n32 and little-endian n64
targets, unchanged in size for x86-64 and, unusually, marginally larger
for big-endian MIPS n64, as follows:

i686:
   text    data     bss     dec     hex filename
 152255    4052     192  156499   26353 ld-2.27.9000-base.so
 152159    4052     192  156403   262f3 ld-2.27.9000-elf-symbol-value.so
MIPS/o32/el:
   text    data     bss     dec     hex filename
 142906    4396     260  147562   2406a ld-2.27.9000-base.so
 142890    4396     260  147546   2405a ld-2.27.9000-elf-symbol-value.so
MIPS/n32/el:
   text    data     bss     dec     hex filename
 142267    4404     260  146931   23df3 ld-2.27.9000-base.so
 142171    4404     260  146835   23d93 ld-2.27.9000-elf-symbol-value.so
MIPS/n64/el:
   text    data     bss     dec     hex filename
 149835    7376     408  157619   267b3 ld-2.27.9000-base.so
 149787    7376     408  157571   26783 ld-2.27.9000-elf-symbol-value.so
MIPS/o32/eb:
   text    data     bss     dec     hex filename
 142870    4396     260  147526   24046 ld-2.27.9000-base.so
 142854    4396     260  147510   24036 ld-2.27.9000-elf-symbol-value.so
MIPS/n32/eb:
   text    data     bss     dec     hex filename
 142019    4404     260  146683   23cfb ld-2.27.9000-base.so
 141923    4404     260  146587   23c9b ld-2.27.9000-elf-symbol-value.so
MIPS/n64/eb:
   text    data     bss     dec     hex filename
 149763    7376     408  157547   2676b ld-2.27.9000-base.so
 149779    7376     408  157563   2677b ld-2.27.9000-elf-symbol-value.so
x86-64:
   text    data     bss     dec     hex filename
 148462    6452     400  155314   25eb2 ld-2.27.9000-base.so
 148462    6452     400  155314   25eb2 ld-2.27.9000-elf-symbol-value.so

	[BZ #19818]
	* sysdeps/generic/ldsodefs.h (LOOKUP_VALUE_ADDRESS): Add `set'
	parameter.
	(SYMBOL_ADDRESS): New macro.
	[!ELF_FUNCTION_PTR_IS_SPECIAL] (DL_SYMBOL_ADDRESS): Use
	SYMBOL_ADDRESS for symbol address calculation.
	* elf/dl-runtime.c (_dl_fixup): Likewise.
	(_dl_profile_fixup): Likewise.
	* elf/dl-symaddr.c (_dl_symbol_address): Likewise.
	* elf/rtld.c (dl_main): Likewise.
	* sysdeps/aarch64/dl-machine.h (elf_machine_rela): Likewise.
	* sysdeps/alpha/dl-machine.h (elf_machine_rela): Likewise.
	* sysdeps/arm/dl-machine.h (elf_machine_rel): Likewise.
	(elf_machine_rela): Likewise.
	* sysdeps/hppa/dl-machine.h (elf_machine_rela): Likewise.
	* sysdeps/hppa/dl-symaddr.c (_dl_symbol_address): Likewise.
	* sysdeps/i386/dl-machine.h (elf_machine_rel): Likewise.
	(elf_machine_rela): Likewise.
	* sysdeps/ia64/dl-machine.h (elf_machine_rela): Likewise.
	* sysdeps/m68k/dl-machine.h (elf_machine_rela): Likewise.
	* sysdeps/microblaze/dl-machine.h (elf_machine_rela): Likewise.
	* sysdeps/mips/dl-machine.h (ELF_MACHINE_BEFORE_RTLD_RELOC):
	Likewise.
	(elf_machine_reloc): Likewise.
	(elf_machine_got_rel): Likewise.
	* sysdeps/mips/dl-trampoline.c (__dl_runtime_resolve): Likewise.
	* sysdeps/nios2/dl-machine.h (elf_machine_rela): Likewise.
	* sysdeps/powerpc/powerpc32/dl-machine.h (elf_machine_rela):
	Likewise.
	* sysdeps/powerpc/powerpc64/dl-machine.h (elf_machine_rela):
	Likewise.
	* sysdeps/riscv/dl-machine.h (elf_machine_rela): Likewise.
	* sysdeps/s390/s390-32/dl-machine.h (elf_machine_rela):
	Likewise.
	* sysdeps/s390/s390-64/dl-machine.h (elf_machine_rela):
	Likewise.
	* sysdeps/sh/dl-machine.h (elf_machine_rela): Likewise.
	* sysdeps/sparc/sparc32/dl-machine.h (elf_machine_rela):
	Likewise.
	* sysdeps/sparc/sparc64/dl-machine.h (elf_machine_rela):
	Likewise.
	* sysdeps/tile/dl-machine.h (elf_machine_rela): Likewise.
	* sysdeps/x86_64/dl-machine.h (elf_machine_rela): Likewise.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
 2018-04-04 23:09:37 +01:00
Samuel Thibault
ad2b41bfd8 hurd: Bump remaining LGPL2+ htl licences to LGPL 2.1+ 
* htl/Makefile: Bump licence to LGPL 2.1+.
	* htl/alloca_cutoff.c: Likewise.
	* htl/cthreads-compat.c: Likewise.
	* htl/lockfile.c: Likewise.
	* htl/pt-alloc.c: Likewise.
	* htl/pt-cancel.c: Likewise.
	* htl/pt-cleanup.c: Likewise.
	* htl/pt-create.c: Likewise.
	* htl/pt-dealloc.c: Likewise.
	* htl/pt-detach.c: Likewise.
	* htl/pt-exit.c: Likewise.
	* htl/pt-getattr.c: Likewise.
	* htl/pt-initialize.c: Likewise.
	* htl/pt-internal.h: Likewise.
	* htl/pt-join.c: Likewise.
	* htl/pt-self.c: Likewise.
	* htl/pt-setcancelstate.c: Likewise.
	* htl/pt-setcanceltype.c: Likewise.
	* htl/pt-sigmask.c: Likewise.
	* htl/pt-spin-inlines.c: Likewise.
	* htl/pt-testcancel.c: Likewise.
	* htl/pt-yield.c: Likewise.
	* htl/tests/test-1.c: Likewise.
	* htl/tests/test-10.c: Likewise.
	* htl/tests/test-11.c: Likewise.
	* htl/tests/test-12.c: Likewise.
	* htl/tests/test-13.c: Likewise.
	* htl/tests/test-14.c: Likewise.
	* htl/tests/test-15.c: Likewise.
	* htl/tests/test-16.c: Likewise.
	* htl/tests/test-17.c: Likewise.
	* htl/tests/test-2.c: Likewise.
	* htl/tests/test-3.c: Likewise.
	* htl/tests/test-4.c: Likewise.
	* htl/tests/test-5.c: Likewise.
	* htl/tests/test-6.c: Likewise.
	* htl/tests/test-7.c: Likewise.
	* htl/tests/test-8.c: Likewise.
	* htl/tests/test-9.c: Likewise.
	* htl/tests/test-__pthread_destroy_specific-skip.c: Likewise.
	* sysdeps/htl/bits/cancelation.h: Likewise.
	* sysdeps/htl/bits/pthread-np.h: Likewise.
	* sysdeps/htl/bits/pthread.h: Likewise.
	* sysdeps/htl/bits/pthreadtypes.h: Likewise.
	* sysdeps/htl/bits/semaphore.h: Likewise.
	* sysdeps/htl/bits/types/__pthread_key.h: Likewise.
	* sysdeps/htl/bits/types/struct___pthread_attr.h: Likewise.
	* sysdeps/htl/bits/types/struct___pthread_barrier.h: Likewise.
	* sysdeps/htl/bits/types/struct___pthread_barrierattr.h: Likewise.
	* sysdeps/htl/bits/types/struct___pthread_cond.h: Likewise.
	* sysdeps/htl/bits/types/struct___pthread_condattr.h: Likewise.
	* sysdeps/htl/bits/types/struct___pthread_mutex.h: Likewise.
	* sysdeps/htl/bits/types/struct___pthread_mutexattr.h: Likewise.
	* sysdeps/htl/bits/types/struct___pthread_once.h: Likewise.
	* sysdeps/htl/bits/types/struct___pthread_rwlock.h: Likewise.
	* sysdeps/htl/bits/types/struct___pthread_rwlockattr.h: Likewise.
	* sysdeps/htl/old_pt-atfork.c: Likewise.
	* sysdeps/htl/pt-atfork.c: Likewise.
	* sysdeps/htl/pt-attr-destroy.c: Likewise.
	* sysdeps/htl/pt-attr-getdetachstate.c: Likewise.
	* sysdeps/htl/pt-attr-getguardsize.c: Likewise.
	* sysdeps/htl/pt-attr-getinheritsched.c: Likewise.
	* sysdeps/htl/pt-attr-getschedparam.c: Likewise.
	* sysdeps/htl/pt-attr-getschedpolicy.c: Likewise.
	* sysdeps/htl/pt-attr-getscope.c: Likewise.
	* sysdeps/htl/pt-attr-getstack.c: Likewise.
	* sysdeps/htl/pt-attr-getstackaddr.c: Likewise.
	* sysdeps/htl/pt-attr-getstacksize.c: Likewise.
	* sysdeps/htl/pt-attr-init.c: Likewise.
	* sysdeps/htl/pt-attr-setdetachstate.c: Likewise.
	* sysdeps/htl/pt-attr-setguardsize.c: Likewise.
	* sysdeps/htl/pt-attr-setinheritsched.c: Likewise.
	* sysdeps/htl/pt-attr-setschedparam.c: Likewise.
	* sysdeps/htl/pt-attr-setschedpolicy.c: Likewise.
	* sysdeps/htl/pt-attr-setscope.c: Likewise.
	* sysdeps/htl/pt-attr-setstack.c: Likewise.
	* sysdeps/htl/pt-attr-setstackaddr.c: Likewise.
	* sysdeps/htl/pt-attr-setstacksize.c: Likewise.
	* sysdeps/htl/pt-attr.c: Likewise.
	* sysdeps/htl/pt-barrier-destroy.c: Likewise.
	* sysdeps/htl/pt-barrier-init.c: Likewise.
	* sysdeps/htl/pt-barrier-wait.c: Likewise.
	* sysdeps/htl/pt-barrier.c: Likewise.
	* sysdeps/htl/pt-barrierattr-destroy.c: Likewise.
	* sysdeps/htl/pt-barrierattr-getpshared.c: Likewise.
	* sysdeps/htl/pt-barrierattr-init.c: Likewise.
	* sysdeps/htl/pt-barrierattr-setpshared.c: Likewise.
	* sysdeps/htl/pt-cond-brdcast.c: Likewise.
	* sysdeps/htl/pt-cond-destroy.c: Likewise.
	* sysdeps/htl/pt-cond-init.c: Likewise.
	* sysdeps/htl/pt-cond-signal.c: Likewise.
	* sysdeps/htl/pt-cond-timedwait.c: Likewise.
	* sysdeps/htl/pt-cond-wait.c: Likewise.
	* sysdeps/htl/pt-cond.c: Likewise.
	* sysdeps/htl/pt-condattr-destroy.c: Likewise.
	* sysdeps/htl/pt-condattr-getclock.c: Likewise.
	* sysdeps/htl/pt-condattr-getpshared.c: Likewise.
	* sysdeps/htl/pt-condattr-init.c: Likewise.
	* sysdeps/htl/pt-condattr-setclock.c: Likewise.
	* sysdeps/htl/pt-condattr-setpshared.c: Likewise.
	* sysdeps/htl/pt-destroy-specific.c: Likewise.
	* sysdeps/htl/pt-equal.c: Likewise.
	* sysdeps/htl/pt-getconcurrency.c: Likewise.
	* sysdeps/htl/pt-getcpuclockid.c: Likewise.
	* sysdeps/htl/pt-getschedparam.c: Likewise.
	* sysdeps/htl/pt-getspecific.c: Likewise.
	* sysdeps/htl/pt-init-specific.c: Likewise.
	* sysdeps/htl/pt-key-create.c: Likewise.
	* sysdeps/htl/pt-key-delete.c: Likewise.
	* sysdeps/htl/pt-key.h: Likewise.
	* sysdeps/htl/pt-mutex-destroy.c: Likewise.
	* sysdeps/htl/pt-mutex-getprioceiling.c: Likewise.
	* sysdeps/htl/pt-mutex-init.c: Likewise.
	* sysdeps/htl/pt-mutex-lock.c: Likewise.
	* sysdeps/htl/pt-mutex-setprioceiling.c: Likewise.
	* sysdeps/htl/pt-mutex-timedlock.c: Likewise.
	* sysdeps/htl/pt-mutex-trylock.c: Likewise.
	* sysdeps/htl/pt-mutex-unlock.c: Likewise.
	* sysdeps/htl/pt-mutexattr-destroy.c: Likewise.
	* sysdeps/htl/pt-mutexattr-getprioceiling.c: Likewise.
	* sysdeps/htl/pt-mutexattr-getprotocol.c: Likewise.
	* sysdeps/htl/pt-mutexattr-getpshared.c: Likewise.
	* sysdeps/htl/pt-mutexattr-gettype.c: Likewise.
	* sysdeps/htl/pt-mutexattr-init.c: Likewise.
	* sysdeps/htl/pt-mutexattr-setprioceiling.c: Likewise.
	* sysdeps/htl/pt-mutexattr-setprotocol.c: Likewise.
	* sysdeps/htl/pt-mutexattr-setpshared.c: Likewise.
	* sysdeps/htl/pt-mutexattr-settype.c: Likewise.
	* sysdeps/htl/pt-mutexattr.c: Likewise.
	* sysdeps/htl/pt-once.c: Likewise.
	* sysdeps/htl/pt-rwlock-attr.c: Likewise.
	* sysdeps/htl/pt-rwlock-destroy.c: Likewise.
	* sysdeps/htl/pt-rwlock-init.c: Likewise.
	* sysdeps/htl/pt-rwlock-rdlock.c: Likewise.
	* sysdeps/htl/pt-rwlock-timedrdlock.c: Likewise.
	* sysdeps/htl/pt-rwlock-timedwrlock.c: Likewise.
	* sysdeps/htl/pt-rwlock-tryrdlock.c: Likewise.
	* sysdeps/htl/pt-rwlock-trywrlock.c: Likewise.
	* sysdeps/htl/pt-rwlock-unlock.c: Likewise.
	* sysdeps/htl/pt-rwlock-wrlock.c: Likewise.
	* sysdeps/htl/pt-rwlockattr-destroy.c: Likewise.
	* sysdeps/htl/pt-rwlockattr-getpshared.c: Likewise.
	* sysdeps/htl/pt-rwlockattr-init.c: Likewise.
	* sysdeps/htl/pt-rwlockattr-setpshared.c: Likewise.
	* sysdeps/htl/pt-setconcurrency.c: Likewise.
	* sysdeps/htl/pt-setschedparam.c: Likewise.
	* sysdeps/htl/pt-setschedprio.c: Likewise.
	* sysdeps/htl/pt-setspecific.c: Likewise.
	* sysdeps/htl/pt-spin.c: Likewise.
	* sysdeps/htl/pt-startup.c: Likewise.
	* sysdeps/htl/pthread.h: Likewise.
	* sysdeps/htl/sem-close.c: Likewise.
	* sysdeps/htl/sem-destroy.c: Likewise.
	* sysdeps/htl/sem-getvalue.c: Likewise.
	* sysdeps/htl/sem-init.c: Likewise.
	* sysdeps/htl/sem-open.c: Likewise.
	* sysdeps/htl/sem-post.c: Likewise.
	* sysdeps/htl/sem-timedwait.c: Likewise.
	* sysdeps/htl/sem-trywait.c: Likewise.
	* sysdeps/htl/sem-unlink.c: Likewise.
	* sysdeps/htl/sem-wait.c: Likewise.
	* sysdeps/hurd/htl/pt-kill.c: Likewise.
	* sysdeps/i386/htl/pt-machdep.h: Likewise.
	* sysdeps/mach/htl/pt-block.c: Likewise.
	* sysdeps/mach/htl/pt-spin.c: Likewise.
	* sysdeps/mach/htl/pt-stack-alloc.c: Likewise.
	* sysdeps/mach/htl/pt-thread-alloc.c: Likewise.
	* sysdeps/mach/htl/pt-thread-start.c: Likewise.
	* sysdeps/mach/htl/pt-thread-terminate.c: Likewise.
	* sysdeps/mach/htl/pt-timedblock.c: Likewise.
	* sysdeps/mach/htl/pt-wakeup.c: Likewise.
	* sysdeps/mach/hurd/htl/bits/pthread-np.h: Likewise.
	* sysdeps/mach/hurd/htl/bits/types/struct___pthread_mutex.h: Likewise.
	* sysdeps/mach/hurd/htl/pt-attr-setstackaddr.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-attr-setstacksize.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-docancel.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-hurd-cond-timedwait.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-hurd-cond-wait.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutex-consistent.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutex-destroy.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutex-getprioceiling.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutex-init.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutex-lock.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutex-setprioceiling.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutex-timedlock.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutex-transfer-np.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutex-trylock.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutex-unlock.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutex.h: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutexattr-destroy.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutexattr-getprioceiling.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutexattr-getprotocol.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutexattr-getpshared.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutexattr-getrobust.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutexattr-gettype.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutexattr-init.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutexattr-setprioceiling.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutexattr-setprotocol.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutexattr-setpshared.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutexattr-setrobust.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-mutexattr-settype.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-sigstate-destroy.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-sigstate-init.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-sigstate.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-sysdep.c: Likewise.
	* sysdeps/mach/hurd/htl/pt-sysdep.h: Likewise.
	* sysdeps/mach/hurd/i386/htl/pt-machdep.c: Likewise.
	* sysdeps/mach/hurd/i386/htl/pt-setup.c: Likewise.
 2018-04-02 16:37:36 +02:00
Samuel Thibault
33574c17ee hurd: Add hurd thread library 
Contributed by

Agustina Arzille <avarzille@riseup.net>
Amos Jeffries <squid3@treenet.co.nz>
David Michael <fedora.dm0@gmail.com>
Marco Gerards <marco@gnu.org>
Marcus Brinkmann <marcus@gnu.org>
Neal H. Walfield <neal@gnu.org>
Pino Toscano <toscano.pino@tiscali.it>
Richard Braun <rbraun@sceen.net>
Roland McGrath <roland@gnu.org>
Samuel Thibault <samuel.thibault@ens-lyon.org>
Thomas DiModica <ricinwich@yahoo.com>
Thomas Schwinge <tschwinge@gnu.org>

	* htl: New directory.
	* sysdeps/htl: New directory.
	* sysdeps/hurd/htl: New directory.
	* sysdeps/i386/htl: New directory.
	* sysdeps/mach/htl: New directory.
	* sysdeps/mach/hurd/htl: New directory.
	* sysdeps/mach/hurd/i386/htl: New directory.
	* nscd/Depend, resolv/Depend, rt/Depend: Add htl dependency.
	* sysdeps/mach/hurd/i386/Implies: Add mach/hurd/i386/htl imply.
	* sysdeps/mach/hurd/i386/libpthread.abilist: New file.
 2018-04-02 01:44:14 +02:00
Andrew Senkevich
cd66c0e584 Fix i386 memmove issue (bug 22644). 
[BZ #22644]
	* sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S: Fixed
	branch conditions.
	* string/test-memmove.c (do_test2): New testcase.
 2018-03-23 16:19:45 +01:00
Joseph Myers
8d3f9e85cf Add narrowing subtract functions. 
This patch adds the narrowing subtract functions from TS 18661-1 to
glibc's libm: fsub, fsubl, dsubl, f32subf64, f32subf32x, f32xsubf64
for all configurations; f32subf64x, f32subf128, f64subf64x,
f64subf128, f32xsubf64x, f32xsubf128, f64xsubf128 for configurations
with _Float64x and _Float128; __nldbl_dsubl for ldbl-opt.

The changes are essentially the same as for the narrowing add
functions, so the description of those generally applies to this patch
as well.

Tested for x86_64, x86, mips64 (all three ABIs, both hard and soft
float) and powerpc, and with build-many-glibcs.py.

	* math/Makefile (libm-narrow-fns): Add sub.
	(libm-test-funcs-narrow): Likewise.
	* math/Versions (GLIBC_2.28): Add narrowing subtract functions.
	* math/bits/mathcalls-narrow.h (sub): Use __MATHCALL_NARROW.
	* math/gen-auto-libm-tests.c (test_functions): Add sub.
	* math/math-narrow.h (CHECK_NARROW_SUB): New macro.
	(NARROW_SUB_ROUND_TO_ODD): Likewise.
	(NARROW_SUB_TRIVIAL): Likewise.
	* sysdeps/ieee754/float128/float128_private.h (__fsubl): New
	macro.
	(__dsubl): Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add fsub and
	dsub.
	(CFLAGS-nldbl-dsub.c): New variable.
	(CFLAGS-nldbl-fsub.c): Likewise.
	* sysdeps/ieee754/ldbl-opt/Versions (GLIBC_2.28): Add
	__nldbl_dsubl.
	* sysdeps/ieee754/ldbl-opt/nldbl-compat.h (__nldbl_dsubl): New
	prototype.
	* manual/arith.texi (Misc FP Arithmetic): Document fsub, fsubl,
	dsubl, fMsubfN, fMsubfNx, fMxsubfN and fMxsubfNx.
	* math/auto-libm-test-in: Add tests of sub.
	* math/auto-libm-test-out-narrow-sub: New generated file.
	* math/libm-test-narrow-sub.inc: New file.
	* sysdeps/i386/fpu/s_f32xsubf64.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_f32xsubf64.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_fsub.c: Likewise.
	* sysdeps/ieee754/float128/s_f32subf128.c: Likewise.
	* sysdeps/ieee754/float128/s_f64subf128.c: Likewise.
	* sysdeps/ieee754/float128/s_f64xsubf128.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_dsubl.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_f64xsubf128.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_fsubl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_dsubl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_fsubl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_dsubl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_fsubl.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-dsub.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-fsub.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_dsubl.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_fsub.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_fsubl.c: Likewise.
	* sysdeps/powerpc/fpu/libm-test-ulps: Update.
	* sysdeps/mach/hurd/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/riscv/rv64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
 2018-03-20 00:34:52 +00:00
Joseph Myers
34ba96b89c Update i386 libm-test-ulps. 
I found the i386 libm-test-ulps files needed updating (probably the
sqrt changes perturbed exactly when excess precision was used by the
compiler).

	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
 2018-03-16 17:43:38 +00:00
Wilco Dijkstra
1294b1892e Add support for sqrt asm redirects 
This patch series cleans up the many uses of  __ieee754_sqrt(f/l) in GLIBC.
The goal is to enable GCC to do the inlining, and if this fails call the
__ieee754_sqrt function.  This is done by internally declaring sqrt with asm
redirects.  The compat symbols and sqrt wrappers need to disable the redirect.
The redirect is also disabled if there are already redirects defined when
using -ffinite-math-only.

All math functions (but not math tests, non-library code and libnldbl) are
built with -fno-math-errno which means GCC will typically inline sqrt as a
single instruction.  This means targets are no longer forced to add a special
inline for sqrt.

	* include/math.h (sqrt): Declare with asm redirect.
	(sqrtf): Likewise.
	(sqrtl): Likewise.
	(sqrtf128): Likewise.
	* Makeconfig: Add -fno-math-errno for libc/libm, but build testsuite,
	nonlib and libnldbl with -fmath-errno.
	* math/w_sqrt_compat.c: Define NO_MATH_REDIRECT.
	* math/w_sqrt_template.c: Likewise.
	* math/w_sqrtf_compat.c: Likewise.
	* math/w_sqrtl_compat.c: Likewise.
	* sysdeps/i386/fpu/w_sqrt.c: Likewise.
	* sysdeps/i386/fpu/w_sqrt_compat.c: Likewise.
	* sysdeps/generic/math-type-macros-float128.h: Remove math.h and
	complex.h.
 2018-03-15 19:21:35 +00:00
Samuel Thibault
a5df0318ef hurd: add gscope support 
* elf/dl-support.c [!THREAD_GSCOPE_IN_TCB] (_dl_thread_gscope_count):
Define variable.
* sysdeps/generic/ldsodefs.h [!THREAD_GSCOPE_IN_TCB] (struct
rtld_global): Add _dl_thread_gscope_count member.
* sysdeps/mach/hurd/tls.h: Include <atomic.h>.
[!defined __ASSEMBLER__] (THREAD_GSCOPE_GLOBAL, THREAD_GSCOPE_SET_FLAG,
THREAD_GSCOPE_RESET_FLAG, THREAD_GSCOPE_WAIT): Define macros.
* sysdeps/generic/tls.h: Document THREAD_GSCOPE_IN_TCB.
* sysdeps/aarch64/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1.
* sysdeps/alpha/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1.
* sysdeps/arm/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1.
* sysdeps/hppa/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1.
* sysdeps/i386/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1.
* sysdeps/ia64/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1.
* sysdeps/m68k/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1.
* sysdeps/microblaze/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1.
* sysdeps/mips/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1.
* sysdeps/nios2/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1.
* sysdeps/powerpc/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1.
* sysdeps/riscv/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1.
* sysdeps/s390/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1.
* sysdeps/sh/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1.
* sysdeps/sparc/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1.
* sysdeps/tile/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1.
* sysdeps/x86_64/nptl/tls.h: Define THREAD_GSCOPE_IN_TCB to 1.
 2018-03-11 13:06:33 +01:00
Joseph Myers
e2bcf6a855 Fix i386 fenv_private.h float128 for 32-bit --with-fpmath=sse (bug 22902). 
As discussed in bug 22902, the i386 fenv_private.h implementation has
problems for float128 for the case of 32-bit glibc built with libgcc
from GCC configured using --with-fpmath=sse.

The optimized floating-point state handling in fenv_private.h needs to
know which floating-point state - x87 or SSE - is used for each
floating-point type, so that only one state needs updating / testing
for libm code using that state internally.  On 32-bit x86, the x87
rounding mode is always used for float128, but the x87 exception flags
are only used when libgcc is built using x87 floating-point
arithmetic; if libgcc is built for SSE arithmetic, the SSE exception
flags are used.

The choice of arithmetic with which libgcc is built is independent of
that with which glibc is built.  Thus, since glibc cannot tell the
choice used in libgcc, the default implementations of
libc_feholdexcept_setroundf128 and libc_feupdateenv_testf128 (which
use the <fenv.h> functions, thus using both x87 and SSE state on
processors that have both) need to be used; this patch updates the
code accordingly.

Tested for 32-bit x86; HJ reports testing in the --with-fpmath=sse
case.

	[BZ #22902]
	* sysdeps/i386/fpu/fenv_private.h [!__x86_64__]
	(libc_feholdexcept_setroundf128): New macro.
	[!__x86_64__] (libc_feupdateenv_testf128): Likewise.
 2018-02-28 21:55:51 +00:00
Wilco Dijkstra
610ee1fc93 Remove mplog and mpexp 
Remove the now unused mplog and mpexp files.

	* math/Makefile: Remove mpexp.c and mplog.c
	* sysdeps/i386/fpu/mpexp.c: Delete file.
	* sysdeps/i386/fpu/mplog.c: Likewise.
	* sysdeps/ia64/fpu/mpexp.c: Likewise.
	* sysdeps/ia64/fpu/mplog.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_exp.c: Remove mention of mpexp and mplog.
	* sysdeps/ieee754/dbl-64/mpa.h (__pow_mp): Remove unused function.
	* sysdeps/ieee754/dbl-64/mpexp.c: Delete file.
	* sysdeps/ieee754/dbl-64/mplog.c: Likewise.
	* sysdeps/m68k/m680x0/fpu/mpexp.c: Likewise.
	* sysdeps/m68k/m680x0/fpu/mplog.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/Makefile: Remove mpexp* and mplog*.
	* sysdeps/x86_64/fpu/multiarch/e_log-avx.c: Remove unused defines.
	* sysdeps/x86_64/fpu/multiarch/e_log-fma.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/e_log-fma4.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/mpexp-avx.c: Delete file.
	* sysdeps/x86_64/fpu/multiarch/mpexp-fma.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/mpexp-fma4.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/mplog-avx.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/mplog-fma.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/mplog-fma4.c: Likewise.
 2018-02-15 12:41:05 +00:00
Szabolcs Nagy
de800d8305 Remove slow paths from exp 
Remove the __slowexp code, so exp is no longer correctly rounded.  The
result is computed to about 70 bits precision so the worst case ulp
error is about 0.500007 in nearest rounding mode.

	* manual/probes.texi: Remove slowexp probes.
	* math/Makefile: Remove slowexp.
	* sysdeps/generic/math_private.h (__slowexp): Remove.
	* sysdeps/ieee754/dbl-64/e_exp.c (__ieee754_exp): Remove __slowexp and
	document error bounds.
	* sysdeps/i386/fpu/slowexp.c: Remove.
	* sysdeps/ia64/fpu/slowexp.c: Remove.
	* sysdeps/ieee754/dbl-64/slowexp.c: Remove.
	* sysdeps/ieee754/dbl-64/uexp.h (err_0): Remove.
	* sysdeps/m68k/m680x0/fpu/slowexp.c: Remove.
	* sysdeps/powerpc/power4/fpu/Makefile (CPPFLAGS-slowexp.c): Remove.
	* sysdeps/x86_64/fpu/multiarch/Makefile: Remove slowexp-fma.
	* sysdeps/x86_64/fpu/multiarch/e_exp-avx.c (__slowexp): Remove.
	* sysdeps/x86_64/fpu/multiarch/e_exp-fma.c (__slowexp): Remove.
	* sysdeps/x86_64/fpu/multiarch/e_exp-fma4.c (__slowexp): Remove.
	* sysdeps/x86_64/fpu/multiarch/slowexp-avx.c: Remove.
	* sysdeps/x86_64/fpu/multiarch/slowexp-fma.c: Remove.
	* sysdeps/x86_64/fpu/multiarch/slowexp-fma4.c: Remove.
 2018-02-12 11:33:33 +00:00
Wilco Dijkstra
c3d466cba1 Remove slow paths from pow 
Remove the slow paths from pow.  Like several other double precision math
functions, pow is exactly rounded.  This is not required from math functions
and causes major overheads as it requires multiple fallbacks using higher
precision arithmetic if a result is close to 0.5ULP.  Ridiculous slowdowns
of up to 100000x have been reported when the highest precision path triggers.

All GLIBC math tests pass on AArch64 and x64 (with ULP of pow set to 1).
The worst case error is ~0.506ULP.  A simple test over a few hundred million
values shows pow is 10% faster on average.  This fixes BZ #13932.

	[BZ #13932]
	* sysdeps/ieee754/dbl-64/uexp.h (err_1): Remove.
	* benchtests/pow-inputs: Update comment for slow path cases.
	* manual/probes.texi (slowpow_p10): Delete removed probe.
	(slowpow_p10): Likewise.
	* math/Makefile: Remove halfulp.c and slowpow.c.
	* sysdeps/aarch64/libm-test-ulps: Set ULP of pow to 1.
	* sysdeps/generic/math_private.h (__exp1): Remove error argument.
	(__halfulp): Remove.
	(__slowpow): Remove.
	* sysdeps/i386/fpu/halfulp.c: Delete file.
	* sysdeps/i386/fpu/slowpow.c: Likewise.
	* sysdeps/ia64/fpu/halfulp.c: Likewise.
	* sysdeps/ia64/fpu/slowpow.c: Likewise.
	* sysdeps/ieee754/dbl-64/e_exp.c (__exp1): Remove error argument,
	improve comments and add error analysis.
	* sysdeps/ieee754/dbl-64/e_pow.c (__ieee754_pow): Add error analysis.
	(power1): Remove function:
	(log1): Remove error argument, add error analysis.
	(my_log2): Remove function.
	* sysdeps/ieee754/dbl-64/halfulp.c: Delete file.
	* sysdeps/ieee754/dbl-64/slowpow.c: Likewise.
	* sysdeps/m68k/m680x0/fpu/halfulp.c: Likewise.
	* sysdeps/m68k/m680x0/fpu/slowpow.c: Likewise.
	* sysdeps/powerpc/power4/fpu/Makefile: Remove CPPFLAGS-slowpow.c.
	* sysdeps/x86_64/fpu/libm-test-ulps: Set ULP of pow to 1.
	* sysdeps/x86_64/fpu/multiarch/Makefile: Remove slowpow-fma.c,
	slowpow-fma4.c, halfulp-fma.c, halfulp-fma4.c.
	* sysdeps/x86_64/fpu/multiarch/e_pow-fma.c (__slowpow): Remove define.
	* sysdeps/x86_64/fpu/multiarch/e_pow-fma4.c (__slowpow): Likewise.
	* sysdeps/x86_64/fpu/multiarch/halfulp-fma.c: Delete file.
	* sysdeps/x86_64/fpu/multiarch/halfulp-fma4.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/slowpow-fma.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/slowpow-fma4.c: Likewise.
 2018-02-12 10:47:09 +00:00
Joseph Myers
d8742dd82f Add narrowing add functions. 
This patch adds the narrowing add functions from TS 18661-1 to glibc's
libm: fadd, faddl, daddl, f32addf64, f32addf32x, f32xaddf64 for all
configurations; f32addf64x, f32addf128, f64addf64x, f64addf128,
f32xaddf64x, f32xaddf128, f64xaddf128 for configurations with
_Float64x and _Float128; __nldbl_daddl for ldbl-opt.  As discussed for
the build infrastructure patch, tgmath.h support is deliberately
deferred, and FP_FAST_* macros are not applicable without optimized
function implementations.

Function implementations are added for all relevant pairs of formats
(including certain cases of a format and itself where more than one
type has that format).  The main implementations use round-to-odd, or
a trivial computation in the case where both formats are the same or
where the wider format is IBM long double (in which case we don't
attempt to be correctly rounding).  The sysdeps/ieee754/soft-fp
implementations use soft-fp, and are used automatically for
configurations without exceptions and rounding modes by virtue of
existing Implies files.  As previously discussed, optimized versions
for particular architectures are possible, but not included.

i386 gets a special version of f32xaddf64 to avoid problems with
double rounding (similar to the existing fdim version), since this
function must round just once without an intermediate rounding to long
double.  (No such special version is needed for any other function,
because the nontrivial functions use round-to-odd, which does the
intermediate computation with the rounding mode set to round-to-zero,
and double rounding is OK except in round-to-nearest mode, so is OK
for that intermediate round-to-zero computation.)  mul and div will
need slightly different special versions for i386 (using round-to-odd
on long double instead of precision control) because of the
possibility of inexact intermediate results in the subnormal range for
double.

To reduce duplication among the different function implementations,
math-narrow.h gets macros CHECK_NARROW_ADD, NARROW_ADD_ROUND_TO_ODD
and NARROW_ADD_TRIVIAL.

In the trivial cases and for any architecture-specific optimized
implementations, the overhead of the errno setting might be
significant, but I think that's best handled through compiler built-in
functions rather than providing separate no-errno versions in glibc
(and likewise there are no __*_finite entry points for these function
provided, __*_finite effectively being no-errno versions at present in
most cases).

Tested for x86_64 and x86, with both GCC 6 and GCC 7.  Tested for
mips64 (all three ABIs, both hard and soft float) and powerpc with GCC
7.  Tested with build-many-glibcs.py with both GCC 6 and GCC 7.

	* math/Makefile (libm-narrow-fns): Add add.
	(libm-test-funcs-narrow): Likewise.
	* math/Versions (GLIBC_2.28): Add narrowing add functions.
	* math/bits/mathcalls-narrow.h (add): Use __MATHCALL_NARROW .
	* math/gen-auto-libm-tests.c (test_functions): Add add.
	* math/math-narrow.h (CHECK_NARROW_ADD): New macro.
	(NARROW_ADD_ROUND_TO_ODD): Likewise.
	(NARROW_ADD_TRIVIAL): Likewise.
	* sysdeps/ieee754/float128/float128_private.h (__faddl): New
	macro.
	(__daddl): Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add fadd and
	dadd.
	(CFLAGS-nldbl-dadd.c): New variable.
	(CFLAGS-nldbl-fadd.c): Likewise.
	* sysdeps/ieee754/ldbl-opt/Versions (GLIBC_2.28): Add
	__nldbl_daddl.
	* sysdeps/ieee754/ldbl-opt/nldbl-compat.h (__nldbl_daddl): New
	prototype.
	* manual/arith.texi (Misc FP Arithmetic): Document fadd, faddl,
	daddl, fMaddfN, fMaddfNx, fMxaddfN and fMxaddfNx.
	* math/auto-libm-test-in: Add tests of add.
	* math/auto-libm-test-out-narrow-add: New generated file.
	* math/libm-test-narrow-add.inc: New file.
	* sysdeps/i386/fpu/s_f32xaddf64.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_f32xaddf64.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_fadd.c: Likewise.
	* sysdeps/ieee754/float128/s_f32addf128.c: Likewise.
	* sysdeps/ieee754/float128/s_f64addf128.c: Likewise.
	* sysdeps/ieee754/float128/s_f64xaddf128.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_daddl.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_f64xaddf128.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_faddl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_daddl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_faddl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_daddl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_faddl.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-dadd.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-fadd.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_daddl.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_fadd.c: Likewise.
	* sysdeps/ieee754/soft-fp/s_faddl.c: Likewise.
	* sysdeps/powerpc/fpu/libm-test-ulps: Update.
	* sysdeps/mach/hurd/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/riscv/rv64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
 2018-02-10 02:08:43 +00:00
Joseph Myers
63716ab270 Add build infrastructure for narrowing libm functions. 
TS 18661-1 defines libm functions that carry out an operation (+ - * /
sqrt fma) on their arguments and return a result rounded to a
(usually) narrower type, as if the original result were computed to
infinite precision and then rounded directly to the result type
without any intermediate rounding to the argument type.  For example,
fadd, faddl and daddl for addition.  These are the last remaining TS
18661-1 functions left to be added to glibc.  TS 18661-3 extends this
to corresponding functions for _FloatN and _FloatNx types.

As functions parametrized by two rather than one varying
floating-point types, these functions require infrastructure in glibc
that was not required for previous libm functions.  This patch
provides such infrastructure - excluding test support, and actual
function implementations, which will be in subsequent patches.

Declaring the functions uses a header bits/mathcalls-narrow.h, which
is included many times, for each relevant pair of types.  This will
end up containing macro calls of the form

__MATHCALL_NARROW (__MATHCALL_NAME (add), __MATHCALL_REDIR_NAME (add), 2);

for each family of narrowing functions.  (The structure of this macro
call, with the calls to __MATHCALL_NAME and __MATHCALL_REDIR_NAME
there rather than in the definition of __MATHCALL_NARROW, arises from
the names such as "add" *not* themselves being reserved identifiers -
meaning it's necessary to avoid any indirection that would result in a
user-defined "add" macro being expanded.)  Whereas for existing
functions declaring long double functions is disabled if _LIBC in the
case where they alias double functions, to facilitate defining the
long double functions as aliases of the double ones, there is no such
logic for the narrowing functions in this patch.  Rather, the files
defining such functions are expected to use #define to hide the
original declarations of the alias names, to avoid errors about
defining aliases with incompatible types.

math/Makefile support is added for building the functions (listed in
libm-narrow-fns, currently empty) for all relevant pairs of types.  An
internal header math-narrow.h is added for macros shared between
multiple function implementations - currently a ROUND_TO_ODD macro to
facilitate writing functions using the round-to-odd implementation
approach, and alias macros to create all the required function
aliases.  libc_feholdexcept_setroundf128 and libc_feupdateenv_testf128
are added for use when required (only for x86_64).  float128_private.h
support is added for ldbl-128 narrowing functions to be used for
_Float128.

Certain things are specifically omitted from this patch and the
immediate followups.  tgmath.h support is deferred; there remain
unresolved questions about how the type-generic macros for these
functions are supposed to work, especially in the case of arguments of
integer type.  The math.h / bits/mathcalls-narrow.h logic, and the
logic for determining what functions / aliases to define, will need
some adjustments to support the sqrt and fma functions, where
e.g. f32xsqrtf64 can just be an alias for sqrt rather than a separate
function.  TS 18661-1 defines FP_FAST_* macros but no support is
included for defining them (they won't in general be true without
architecture-specific optimized function versions).

For each of the function groups (add sub mul div sqrt fma) there are
always six functions present (e.g. fadd, faddl, daddl, f32addf64,
f32addf32x, f32xaddf64).  When _Float64x and _Float128 are supported,
there are seven more (e.g. f32addf64x, f32addf128, f64addf64x,
f64addf128, f32xaddf64x, f32xaddf128, f64xaddf128).  In addition, in
the ldbl-opt case there are function names such as __nldbl_daddl (an
alias for f32xaddf64, which is not a reserved name in TS 18661-1, only
in TS 18661-3), for calls to daddl to be mapped to in the
-mlong-double-64 case.  (Calls to faddl just get mapped to fadd, and
for sqrt and fma there won't be __nldbl_* functions because dsqrtl and
dfmal can just be mapped to sqrt and fma with -mlong-double-64.)

While there are six or thirteen functions present in each group (plus
__nldbl_* names only as an ABI, not an API), not all are distinct;
they fall in various groups of aliases.  There are two distinct
versions built if long double has the same format as double; four if
they have distinct formats but there is no _Float64x or _Float128
support; five if long double has binary128 format; seven when
_Float128 is distinct from long double.

Architecture-specific optimized versions are possible, but not
included in my patches.  For example, IA64 generally supports
narrowing the result of most floating-point instructions; Power ISA
2.07 (POWER8) supports double values as arguments to float
instructions, with the results narrowed as expected; Power ISA 3
(POWER9) supports round-to-odd for float128 instructions, so meaning
that approach can be used without needing to set and restore the
rounding mode and test "inexact".  I intend to leave any such
optimized versions to the architecture maintainers.  Generally in such
cases it would also make sense for calls to these functions to be
expanded inline (given -fno-math-errno); I put a suggestion for TS
18661-1 built-in functions at <https://gcc.gnu.org/wiki/SummerOfCode>.

Tested for x86_64 (this patch in isolation, as well as testing for
various configurations in conjunction with further patches).

	* math/bits/mathcalls-narrow.h: New file.
	* include/bits/mathcalls-narrow.h: Likewise.
	* math/math-narrow.h: Likewise.
	* math/math.h (__MATHCALL_NARROW_ARGS_1): New macro.
	(__MATHCALL_NARROW_ARGS_2): Likewise.
	(__MATHCALL_NARROW_ARGS_3): Likewise.
	(__MATHCALL_NARROW_NORMAL): Likewise.
	(__MATHCALL_NARROW_REDIR): Likewise.
	(__MATHCALL_NARROW): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)]: Repeatedly include
	<bits/mathcalls-narrow.h> with _Mret_, _Marg_ and __MATHCALL_NAME
	defined.
	[__GLIBC_USE (IEC_60559_TYPES_EXT)]: Likewise.
	* math/Makefile (headers): Add bits/mathcalls-narrow.h.
	(libm-narrow-fns): New variable.
	(libm-narrow-types-basic): Likewise.
	(libm-narrow-types-ldouble-yes): Likewise.
	(libm-narrow-types-float128-yes): Likewise.
	(libm-narrow-types-float128-alias-yes): Likewise.
	(libm-narrow-types): Likewise.
	(libm-routines): Add narrowing functions.
	* sysdeps/i386/fpu/fenv_private.h [__x86_64__]
	(libc_feholdexcept_setroundf128): New macro.
	[__x86_64__] (libc_feupdateenv_testf128): Likewise.
	* sysdeps/ieee754/float128/float128_private.h: Include
	<math/math-narrow.h>.
	[libc_feholdexcept_setroundf128] (libc_feholdexcept_setroundl):
	Undefine and redefine.
	[libc_feupdateenv_testf128] (libc_feupdateenv_testl): Likewise.
	(libm_alias_float_ldouble): Undefine and redefine.
	(libm_alias_double_ldouble): Likewise.
 2018-02-09 21:18:52 +00:00
H.J. Lu
f886c16ca5 i386: Use __glibc_likely/__glibc_likely in dl-machine.h 
The differences in elf/dl-reloc.os are

--- before    	2018-02-05 03:53:31.970492246 -0800
+++ after     	2018-02-05 03:53:49.719902340 -0800
@@ -1202,9 +1202,9 @@ _dl_relocate_object:
 	movl	-60(%ebp), %eax
 	testl	%eax, %eax
 	je	.L249
-	movl	8(%eax), %eax
-	movl	8(%ebx), %esi
-	cmpl	%esi, %eax
+	movl	8(%eax), %esi
+	movl	8(%ebx), %eax
+	cmpl	%eax, %esi
 	ja	.L284
 	jb	.L707
 .L285:
@@ -2255,7 +2255,7 @@ _dl_relocate_object:
 	cmpl	$6, %edi
 	movl	$4, %edx
 	je	.L132
-	cmpl	%ecx, %eax
+	cmpl	%eax, %ecx
 	je	.L350
 	cmpl	$7, %edi
 	je	.L419
@@ -2735,7 +2735,7 @@ _dl_relocate_object:
 	je	.L120
 .L121:
 	movl	-96(%ebp), %edx
-	movl	$640, 8(%esp)
+	movl	$639, 8(%esp)
 	leal	__PRETTY_FUNCTION__.9431@GOTOFF(%edx), %eax
 	movl	%eax, 12(%esp)
 	leal	.LC9@GOTOFF(%edx), %eax
@@ -3454,10 +3454,10 @@ _dl_relocate_object:
 	movl	-152(%ebp), %eax
 	movl	%eax, 4(%esp)
 	call	_dl_dprintf
-	movl	-60(%ebp), %eax
-	movl	8(%ebx), %esi
+	movl	8(%ebx), %eax
+	movl	-60(%ebp), %ebx
 	movl	-112(%ebp), %edx
-	movl	8(%eax), %eax
+	movl	8(%ebx), %esi
 	jmp	.L285
 .L713:
 	movl	%esi, (%esp)

	* sysdeps/i386/dl-machine.h (elf_machine_rel): Replace
	__builtin_expect with __glibc_likely and __glibc_unlikely.
	(elf_machine_rela): Likewise.
	(elf_machine_lazy_rel): Likewise.
 2018-02-05 06:22:40 -08:00
Carlos O'Donell
2ec0e7eade Revert Intel CET changes to __jmp_buf_tag (Bug 22743) 
In commit cba595c350 and commit
f81ddabffd, ABI compatibility with
applications was broken by increasing the size of the on-stack
allocated __pthread_unwind_buf_t beyond the oringal size.
Applications only have the origianl space available for
__pthread_unwind_register, and __pthread_unwind_next to use,
any increase in the size of __pthread_unwind_buf_t causes these
functions to write beyond the original structure into other
on-stack variables leading to segmentation faults in common
applications like vlc. The only workaround is to version those
functions which operate on the old sized objects, but this must
happen in glibc 2.28.

Thank you to Andrew Senkevich, H.J. Lu, and Aurelien Jarno, for
submitting reports and tracking the issue down.

The commit reverts the above mentioned commits and testing on
x86_64 shows that the ABI compatibility is restored. A tst-cleanup1
regression test linked with an older glibc now passes when run
with the newly built glibc. Previously a tst-cleanup1 linked with
an older glibc would segfault when run with an affected glibc build.

Tested on x86_64 with no regressions.

Signed-off-by: Carlos O'Donell <carlos@redhat.com>
 2018-01-25 23:43:46 -08:00
Samuel Thibault
107a35a575 i386: Regenerate libm-test-ulps for for gcc 7 on i686 
* sysdeps/i386/fpu/libm-test-ulps: Regenerated for GCC 7 with
	"-O2 -march=i686".
 2018-01-06 22:11:40 +01:00
Samuel Thibault
4a5ce6e908 hurd: Fix build without NO_HIDDEN 
* sysdeps/i386/dl-tlsdesc.S (_dl_tlsdesc_dynamic) [NO_RTLD_HIDDEN]: Call
JUMPTARGET (___tls_get_addr) instead of HIDDEN_JUMPTARGET (___tls_get_addr).
* sysdeps/x86_64/dl-tlsdesc.S (_dl_tlsdesc_dynamic): Likewise.
 2018-01-06 18:20:18 +01:00
Joseph Myers
688903eb3e Update copyright dates with scripts/update-copyrights. 
* All files with FSF copyright notices: Update copyright dates
	using scripts/update-copyrights.
	* locale/programs/charmap-kw.h: Regenerated.
	* locale/programs/locfile-kw.h: Likewise.
 2018-01-01 00:32:25 +00:00
Joseph Myers
f1e005022e Revert exp reimplementation (causes test failures). 
Revert:

	2017-12-19  Joseph Myers  <joseph@codesourcery.com>

	* sysdeps/x86_64/fpu/libm-test-ulps: Update.

	2017-12-19  Patrick McGehearty  <patrick.mcgehearty@oracle.com>

	* sysdeps/ieee754/dbl-64/e_exp.c: Include <math-svid-compat.h> and
	<errno.h>.  Include "eexp.tbl".
	(half): New constant.
	(one): Likewise.
	(__ieee754_exp): Rewrite.
	(__slowexp): Remove prototype.
	* sysdeps/ieee754/dbl-64/eexp.tbl: New file.
	* sysdeps/ieee754/dbl-64/slowexp.c: Remove file.
	* sysdeps/i386/fpu/slowexp.c: Likewise.
	* sysdeps/ia64/fpu/slowexp.c: Likewise.
	* sysdeps/m68k/m680x0/fpu/slowexp.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/slowexp-avx.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/slowexp-fma.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/slowexp-fma4.c: Likewise.
	* sysdeps/generic/math_private.h (__slowexp): Remove prototype.
	* sysdeps/ieee754/dbl-64/e_pow.c: Remove mention of slowexp.c in
	comment.
	* sysdeps/powerpc/power4/fpu/Makefile [$(subdir) = math]
	(CPPFLAGS-slowexp.c): Remove variable.
	* sysdeps/x86_64/fpu/multiarch/Makefile (libm-sysdep_routines):
	Remove slowexp-fma, slowexp-fma4 and slowexp-avx.
	(CFLAGS-slowexp-fma.c): Remove variable.
	(CFLAGS-slowexp-fma4.c): Likewise.
	(CFLAGS-slowexp-avx.c): Likewise.
	* sysdeps/x86_64/fpu/multiarch/e_exp-avx.c (__slowexp): Do not
	define as macro.
	* sysdeps/x86_64/fpu/multiarch/e_exp-fma.c (__slowexp): Likewise.
	* sysdeps/x86_64/fpu/multiarch/e_exp-fma4.c (__slowexp): Likewise.
	* math/Makefile (type-double-routines): Remove slowexp.
	* manual/probes.texi (slowexp_p6): Remove.
	(slowexp_p32): Likewise.
 2017-12-19 18:11:37 +00:00
Patrick McGehearty
6fd0a3c6a8 Improve __ieee754_exp() performance by greater than 5x on sparc/x86. 
These changes will be active for all platforms that don't provide
their own exp() routines. They will also be active for ieee754
versions of ccos, ccosh, cosh, csin, csinh, sinh, exp10, gamma, and
erf.

Typical performance gains is typically around 5x when measured on
Sparc s7 for common values between exp(1) and exp(40).

Using the glibc perf tests on sparc,
      sparc (nsec)    x86 (nsec)
      old     new     old     new
max   17629   395    5173     144
min     399    54      15      13
mean   5317   200    1349      23

The extreme max times for the old (ieee754) exp are due to the
multiprecision computation in the old algorithm when the true value is
very near 0.5 ulp away from an value representable in double
precision. The new algorithm does not take special measures for those
cases. The current glibc exp perf tests overrepresent those values.
Informal testing suggests approximately one in 200 cases might
invoke the high cost computation. The performance advantage of the new
algorithm for other values is still large but not as large as indicated
by the chart above.

Glibc correctness tests for exp() and expf() were run. Within the
test suite 3 input values were found to cause 1 bit differences (ulp)
when "FE_TONEAREST" rounding mode is set. No differences in exp() were
seen for the tested values for the other rounding modes.
Typical example:
exp(-0x1.760cd2p+0)  (-1.46113312244415283203125)
 new code:    2.31973271630014299393707e-01   0x1.db14cd799387ap-3
 old code:    2.31973271630014271638132e-01   0x1.db14cd7993879p-3
    exp    =  2.31973271630014285508337 (high precision)
Old delta: off by 0.49 ulp
New delta: off by 0.51 ulp

In addition, because ieee754_exp() is used by other routines, cexp()
showed test results with very small imaginary input values where the
imaginary portion of the result was off by 3 ulp when in upward
rounding mode, but not in the other rounding modes.  For x86, tgamma
showed a few values where the ulp increased to 6 (max ulp for tgamma
is 5). Sparc tgamma did not show these failures.  I presume the tgamma
differences are due to compiler optimization differences within the
gamma function.The gamma function is known to be difficult to compute
accurately.

	* sysdeps/ieee754/dbl-64/e_exp.c: Include <math-svid-compat.h> and
	<errno.h>.  Include "eexp.tbl".
	(half): New constant.
	(one): Likewise.
	(__ieee754_exp): Rewrite.
	(__slowexp): Remove prototype.
	* sysdeps/ieee754/dbl-64/eexp.tbl: New file.
	* sysdeps/ieee754/dbl-64/slowexp.c: Remove file.
	* sysdeps/i386/fpu/slowexp.c: Likewise.
	* sysdeps/ia64/fpu/slowexp.c: Likewise.
	* sysdeps/m68k/m680x0/fpu/slowexp.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/slowexp-avx.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/slowexp-fma.c: Likewise.
	* sysdeps/x86_64/fpu/multiarch/slowexp-fma4.c: Likewise.
	* sysdeps/generic/math_private.h (__slowexp): Remove prototype.
	* sysdeps/ieee754/dbl-64/e_pow.c: Remove mention of slowexp.c in
	comment.
	* sysdeps/powerpc/power4/fpu/Makefile [$(subdir) = math]
	(CPPFLAGS-slowexp.c): Remove variable.
	* sysdeps/x86_64/fpu/multiarch/Makefile (libm-sysdep_routines):
	Remove slowexp-fma, slowexp-fma4 and slowexp-avx.
	(CFLAGS-slowexp-fma.c): Remove variable.
	(CFLAGS-slowexp-fma4.c): Likewise.
	(CFLAGS-slowexp-avx.c): Likewise.
	* sysdeps/x86_64/fpu/multiarch/e_exp-avx.c (__slowexp): Do not
	define as macro.
	* sysdeps/x86_64/fpu/multiarch/e_exp-fma.c (__slowexp): Likewise.
	* sysdeps/x86_64/fpu/multiarch/e_exp-fma4.c (__slowexp): Likewise.
	* math/Makefile (type-double-routines): Remove slowexp.
	* manual/probes.texi (slowexp_p6): Remove.
	(slowexp_p32): Likewise.
 2017-12-19 17:27:31 +00:00
H.J. Lu
cba595c350 x86: Add feature_1 to tcbhead_t [BZ #22563] 
On x86, padding in struct __jmp_buf_tag is used for shadow stack pointer
to support Shadow Stack in Intel Control-flow Enforcemen Technology.
cancel_jmp_buf has been updated to include saved_mask so that it is as
large as struct __jmp_buf_tag.  We must suport the old cancel_jmp_buf
in existing binaries.  Since symbol versioning doesn't work on
cancel_jmp_buf, feature_1 is added to tcbhead_t so that setjmp and
longjmp can check if shadow stack is enabled.  NB: Shadow stack is
enabled only if all modules are shadow stack enabled.

	[BZ #22563]
	* sysdeps/i386/nptl/tcb-offsets.sym (FEATURE_1_OFFSET): New.
	* sysdeps/i386/nptl/tls.h (tcbhead_t): Add feature_1.
	* sysdeps/x86_64/nptl/tcb-offsets.sym (FEATURE_1_OFFSET): New.
	* sysdeps/x86_64/nptl/tls.h (tcbhead_t): Rename __glibc_unused1
	to feature_1.
 2017-12-19 02:45:34 -08:00
H.J. Lu
9d7a3741c9 Add --enable-static-pie configure option to build static PIE [BZ #19574] 
Static PIE extends address space layout randomization to static
executables.  It provides additional security hardening benefits at
the cost of some memory and performance.

Dynamic linker, ld.so, is a standalone program which can be loaded at
any address.  This patch adds a configure option, --enable-static-pie,
to embed the part of ld.so in static executable to create static position
independent executable (static PIE).  A static PIE is similar to static
executable, but can be loaded at any address without help from a dynamic
linker.  When --enable-static-pie is used to configure glibc, libc.a is
built as PIE and all static executables, including tests, are built as
static PIE.  The resulting libc.a can be used together with GCC 8 or
above to build static PIE with the compiler option, -static-pie.  But
GCC 8 isn't required to build glibc with --enable-static-pie.  Only GCC
with PIE support is needed.  When an older GCC is used to build glibc
with --enable-static-pie, proper input files are passed to linker to
create static executables as static PIE, together with "-z text" to
prevent dynamic relocations in read-only segments, which are not allowed
in static PIE.

The following changes are made for static PIE:

1. Add a new function, _dl_relocate_static_pie, to:
   a. Get the run-time load address.
   b. Read the dynamic section.
   c. Perform dynamic relocations.
Dynamic linker also performs these steps.  But static PIE doesn't load
any shared objects.
2. Call _dl_relocate_static_pie at entrance of LIBC_START_MAIN in
libc.a.  crt1.o, which is used to create dynamic and non-PIE static
executables, is updated to include a dummy _dl_relocate_static_pie.
rcrt1.o is added to create static PIE, which will link in the real
_dl_relocate_static_pie.  grcrt1.o is also added to create static PIE
with -pg.  GCC 8 has been updated to support rcrt1.o and grcrt1.o for
static PIE.

Static PIE can work on all architectures which support PIE, provided:

1. Target must support accessing of local functions without dynamic
relocations, which is needed in start.S to call __libc_start_main with
function addresses of __libc_csu_init, __libc_csu_fini and main.  All
functions in static PIE are local functions.  If PIE start.S can't reach
main () defined in a shared object, the code sequence:

	pass address of local_main to __libc_start_main
	...

local_main:
	tail call to main via PLT

can be used.
2. start.S is updated to check PIC instead SHARED for PIC code path and
avoid dynamic relocation, when PIC is defined and SHARED isn't defined,
to support static PIE.
3. All assembly codes are updated check PIC instead SHARED for PIC code
path to avoid dynamic relocations in read-only sections.
4. All assembly codes are updated check SHARED instead PIC for static
symbol name.
5. elf_machine_load_address in dl-machine.h are updated to support static
PIE.
6. __brk works without TLS nor dynamic relocations in read-only section
so that it can be used by __libc_setup_tls to initializes TLS in static
PIE.

NB: When glibc is built with GCC defaulted to PIE, libc.a is compiled
with -fPIE, regardless if --enable-static-pie is used to configure glibc.
When glibc is configured with --enable-static-pie, libc.a is compiled
with -fPIE, regardless whether GCC defaults to PIE or not.  The same
libc.a can be used to build both static executable and static PIE.
There is no need for separate PIE copy of libc.a.

On x86-64, the normal static sln:

   text	   data	    bss	    dec	    hex	filename
 625425	   8284	   5456	 639165	  9c0bd	elf/sln

the static PIE sln:

   text	   data	    bss	    dec	    hex	filename
 657626	  20636	   5392	 683654	  a6e86	elf/sln

The code size is increased by 5% and the binary size is increased by 7%.

Linker requirements to build glibc with --enable-static-pie:

1. Linker supports --no-dynamic-linker to remove PT_INTERP segment from
static PIE.
2. Linker can create working static PIE.  The x86-64 linker needs the
fix for

https://sourceware.org/bugzilla/show_bug.cgi?id=21782

The i386 linker needs to be able to convert "movl main@GOT(%ebx), %eax"
to "leal main@GOTOFF(%ebx), %eax" if main is defined locally.

Binutils 2.29 or above are OK for i686 and x86-64.  But linker status for
other targets need to be verified.

3. Linker should resolve undefined weak symbols to 0 in static PIE:

https://sourceware.org/bugzilla/show_bug.cgi?id=22269

4. Many ELF backend linkers incorrectly check bfd_link_pic for TLS
relocations, which should check bfd_link_executable instead:

https://sourceware.org/bugzilla/show_bug.cgi?id=22263

Tested on aarch64, i686 and x86-64.

Using GCC 7 and binutils master branch, build-many-glibcs.py with
--enable-static-pie with all patches for static PIE applied have the
following build successes:

PASS: glibcs-aarch64_be-linux-gnu build
PASS: glibcs-aarch64-linux-gnu build
PASS: glibcs-armeb-linux-gnueabi-be8 build
PASS: glibcs-armeb-linux-gnueabi build
PASS: glibcs-armeb-linux-gnueabihf-be8 build
PASS: glibcs-armeb-linux-gnueabihf build
PASS: glibcs-arm-linux-gnueabi build
PASS: glibcs-arm-linux-gnueabihf build
PASS: glibcs-arm-linux-gnueabihf-v7a build
PASS: glibcs-arm-linux-gnueabihf-v7a-disable-multi-arch build
PASS: glibcs-m68k-linux-gnu build
PASS: glibcs-microblazeel-linux-gnu build
PASS: glibcs-microblaze-linux-gnu build
PASS: glibcs-mips64el-linux-gnu-n32 build
PASS: glibcs-mips64el-linux-gnu-n32-nan2008 build
PASS: glibcs-mips64el-linux-gnu-n32-nan2008-soft build
PASS: glibcs-mips64el-linux-gnu-n32-soft build
PASS: glibcs-mips64el-linux-gnu-n64 build
PASS: glibcs-mips64el-linux-gnu-n64-nan2008 build
PASS: glibcs-mips64el-linux-gnu-n64-nan2008-soft build
PASS: glibcs-mips64el-linux-gnu-n64-soft build
PASS: glibcs-mips64-linux-gnu-n32 build
PASS: glibcs-mips64-linux-gnu-n32-nan2008 build
PASS: glibcs-mips64-linux-gnu-n32-nan2008-soft build
PASS: glibcs-mips64-linux-gnu-n32-soft build
PASS: glibcs-mips64-linux-gnu-n64 build
PASS: glibcs-mips64-linux-gnu-n64-nan2008 build
PASS: glibcs-mips64-linux-gnu-n64-nan2008-soft build
PASS: glibcs-mips64-linux-gnu-n64-soft build
PASS: glibcs-mipsel-linux-gnu build
PASS: glibcs-mipsel-linux-gnu-nan2008 build
PASS: glibcs-mipsel-linux-gnu-nan2008-soft build
PASS: glibcs-mipsel-linux-gnu-soft build
PASS: glibcs-mips-linux-gnu build
PASS: glibcs-mips-linux-gnu-nan2008 build
PASS: glibcs-mips-linux-gnu-nan2008-soft build
PASS: glibcs-mips-linux-gnu-soft build
PASS: glibcs-nios2-linux-gnu build
PASS: glibcs-powerpc64le-linux-gnu build
PASS: glibcs-powerpc64-linux-gnu build
PASS: glibcs-tilegxbe-linux-gnu-32 build
PASS: glibcs-tilegxbe-linux-gnu build
PASS: glibcs-tilegx-linux-gnu-32 build
PASS: glibcs-tilegx-linux-gnu build
PASS: glibcs-tilepro-linux-gnu build

and the following build failures:

FAIL: glibcs-alpha-linux-gnu build

elf/sln is failed to link due to:

assertion fail bfd/elf64-alpha.c:4125

This is caused by linker bug and/or non-PIC code in PIE libc.a.

FAIL: glibcs-hppa-linux-gnu build

elf/sln is failed to link due to:

collect2: fatal error: ld terminated with signal 11 [Segmentation fault]

https://sourceware.org/bugzilla/show_bug.cgi?id=22537

FAIL: glibcs-ia64-linux-gnu build

elf/sln is failed to link due to:

collect2: fatal error: ld terminated with signal 11 [Segmentation fault]

FAIL: glibcs-powerpc-linux-gnu build
FAIL: glibcs-powerpc-linux-gnu-soft build
FAIL: glibcs-powerpc-linux-gnuspe build
FAIL: glibcs-powerpc-linux-gnuspe-e500v1 build

elf/sln is failed to link due to:

ld: read-only segment has dynamic relocations.

This is caused by linker bug and/or non-PIC code in PIE libc.a.  See:

https://sourceware.org/bugzilla/show_bug.cgi?id=22264

FAIL: glibcs-powerpc-linux-gnu-power4 build

elf/sln is failed to link due to:

findlocale.c:96:(.text+0x22c): @local call to ifunc memchr

This is caused by linker bug and/or non-PIC code in PIE libc.a.

FAIL: glibcs-s390-linux-gnu build

elf/sln is failed to link due to:

collect2: fatal error: ld terminated with signal 11 [Segmentation fault], core dumped

assertion fail bfd/elflink.c:14299

This is caused by linker bug and/or non-PIC code in PIE libc.a.

FAIL: glibcs-sh3eb-linux-gnu build
FAIL: glibcs-sh3-linux-gnu build
FAIL: glibcs-sh4eb-linux-gnu build
FAIL: glibcs-sh4eb-linux-gnu-soft build
FAIL: glibcs-sh4-linux-gnu build
FAIL: glibcs-sh4-linux-gnu-soft build

elf/sln is failed to link due to:

ld: read-only segment has dynamic relocations.

This is caused by linker bug and/or non-PIC code in PIE libc.a.  See:

https://sourceware.org/bugzilla/show_bug.cgi?id=22263

Also TLS code sequence in SH assembly syscalls in glibc doesn't match TLS
code sequence expected by ld:

https://sourceware.org/bugzilla/show_bug.cgi?id=22270

FAIL: glibcs-sparc64-linux-gnu build
FAIL: glibcs-sparcv9-linux-gnu build
FAIL: glibcs-tilegxbe-linux-gnu build
FAIL: glibcs-tilegxbe-linux-gnu-32 build
FAIL: glibcs-tilegx-linux-gnu build
FAIL: glibcs-tilegx-linux-gnu-32 build
FAIL: glibcs-tilepro-linux-gnu build

elf/sln is failed to link due to:

ld: read-only segment has dynamic relocations.

This is caused by linker bug and/or non-PIC code in PIE libc.a.  See:

https://sourceware.org/bugzilla/show_bug.cgi?id=22263

	[BZ #19574]
	* INSTALL: Regenerated.
	* Makeconfig (real-static-start-installed-name): New.
	(pic-default): Updated for --enable-static-pie.
	(pie-default): New for --enable-static-pie.
	(default-pie-ldflag): Likewise.
	(+link-static-before-libc): Replace $(DEFAULT-LDFLAGS-$(@F))
	with $(if $($(@F)-no-pie),$(no-pie-ldflag),$(default-pie-ldflag)).
	Replace $(static-start-installed-name) with
	$(real-static-start-installed-name).
	(+prectorT): Updated for --enable-static-pie.
	(+postctorT): Likewise.
	(CFLAGS-.o): Add $(pie-default).
	(CFLAGS-.op): Likewise.
	* NEWS: Mention --enable-static-pie.
	* config.h.in (ENABLE_STATIC_PIE): New.
	* configure.ac (--enable-static-pie): New configure option.
	(have-no-dynamic-linker): New LIBC_CONFIG_VAR.
	(have-static-pie): Likewise.
	Enable static PIE if linker supports --no-dynamic-linker.
	(ENABLE_STATIC_PIE): New AC_DEFINE.
	(enable-static-pie): New LIBC_CONFIG_VAR.
	* configure: Regenerated.
	* csu/Makefile (omit-deps): Add r$(start-installed-name) and
	gr$(start-installed-name) for --enable-static-pie.
	(extra-objs): Likewise.
	(install-lib): Likewise.
	(extra-objs): Add static-reloc.o and static-reloc.os
	($(objpfx)$(start-installed-name)): Also depend on
	$(objpfx)static-reloc.o.
	($(objpfx)r$(start-installed-name)): New.
	($(objpfx)g$(start-installed-name)): Also depend on
	$(objpfx)static-reloc.os.
	($(objpfx)gr$(start-installed-name)): New.
	* csu/libc-start.c (LIBC_START_MAIN): Call _dl_relocate_static_pie
	in libc.a.
	* csu/libc-tls.c (__libc_setup_tls): Add main_map->l_addr to
	initimage.
	* csu/static-reloc.c: New file.
	* elf/Makefile (routines): Add dl-reloc-static-pie.
	(elide-routines.os): Likewise.
	(DEFAULT-LDFLAGS-tst-tls1-static-non-pie): Removed.
	(tst-tls1-static-non-pie-no-pie): New.
	* elf/dl-reloc-static-pie.c: New file.
	* elf/dl-support.c (_dl_get_dl_main_map): New function.
	* elf/dynamic-link.h (ELF_DURING_STARTUP): Also check
	STATIC_PIE_BOOTSTRAP.
	* elf/get-dynamic-info.h (elf_get_dynamic_info): Likewise.
	* gmon/Makefile (tests): Add tst-gmon-static-pie.
	(tests-static): Likewise.
	(DEFAULT-LDFLAGS-tst-gmon-static): Removed.
	(tst-gmon-static-no-pie): New.
	(CFLAGS-tst-gmon-static-pie.c): Likewise.
	(CRT-tst-gmon-static-pie): Likewise.
	(tst-gmon-static-pie-ENV): Likewise.
	(tests-special): Likewise.
	($(objpfx)tst-gmon-static-pie.out): Likewise.
	(clean-tst-gmon-static-pie-data): Likewise.
	($(objpfx)tst-gmon-static-pie-gprof.out): Likewise.
	* gmon/tst-gmon-static-pie.c: New file.
	* manual/install.texi: Document --enable-static-pie.
	* sysdeps/generic/ldsodefs.h (_dl_relocate_static_pie): New.
	(_dl_get_dl_main_map): Likewise.
	* sysdeps/i386/configure.ac: Check if linker supports static PIE.
	* sysdeps/x86_64/configure.ac: Likewise.
	* sysdeps/i386/configure: Regenerated.
	* sysdeps/x86_64/configure: Likewise.
	* sysdeps/mips/Makefile (ASFLAGS-.o): Add $(pie-default).
	(ASFLAGS-.op): Likewise.
 2017-12-15 17:12:14 -08:00
Joseph Myers
1f9055ce04 Add _Float32 function aliases. 
This patch concludes filling out TS 18661-3 support for different
types by adding *f32 function aliases of float functions to support
_Float32.  As with _Float64 and _Float32x, this is supported for all
glibc configurations.  As with the previous such patches there are
some x86 ulps updates because of inline functions present for float
but not for _Float32.  The patch also has the usual
bits/floatn-common.h update, symbol versions, ABI baselines updates,
test enablement and documentation.

Tested for x86_64 and x86, and with build-many-glibcs.py, with both
GCC 6 and GCC 7.

	* bits/floatn-common.h (__HAVE_FLOAT32): Define to 1.
	* manual/math.texi (Mathematics): Document support for _Float32.
	* math/Makefile (test-types): Add float32.
	* math/Versions (GLIBC_2.27): Add _Float32 functions.
	* stdlib/Versions (GLIBC_2.27): Likewise.
	* wcsmbs/Versions (GLIBC_2.27): Likewise.
	* sysdeps/unix/sysv/linux/aarch64/libc.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.

	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
 2017-12-07 00:48:31 +00:00
Joseph Myers
0d93b7fd7c Add _Float64, _Float32x function aliases. 
This patch continues filling out TS 18661-3 support by adding *f64 and
*f32x function aliases, supporting _Float64 and _Float32x, as aliases
for double functions.  These types are supported for all glibc
configurations.  The API corresponds exactly to that for _Float128 and
_Float64x.  _Float32 aliases to float functions remain to be added in
subsequent patches to complete this process (then there are a few
miscellaneous functions in TS 18661-3 to implement that aren't simply
versions of existing functions for new types).

The patch enables the feature in bits/floatn-common.h, adds symbol
versions and documentation with updates to ABI baselines, and arranges
for the libm functions for the new types to be tested.  As with the
_Float64x changes there are some x86 ulps updates because of header
inlines not used for the new types (and one other change to the
non-multiarch libm-test-ulps, which I suppose comes from using a
different compiler version / configuration from when it was last
regenerated).

Tested for x86_64 and x86, and with build-many-glibcs.py, with both
GCC 6 and GCC 7.

	* bits/floatn-common.h (__HAVE_FLOAT64): Define to 1.
	(__HAVE_FLOAT32X): Likewise.
	* manual/math.texi (Mathematics): Document support for _Float64
	and _Float32x.
	* math/Makefile (test-types): Add float64 and float32x.
	* math/Versions (GLIBC_2.27): Add _Float64 and _Float32x
	functions.
	* stdlib/Versions (GLIBC_2.27): Likewise.
	* wcsmbs/Versions (GLIBC_2.27): Likewise.
	* sysdeps/unix/sysv/linux/aarch64/libc.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
 2017-12-06 00:58:03 +00:00
Joseph Myers
e4602cba2f Use libm_alias_float for i386. 
Continuing the preparation for additional _FloatN / _FloatNx function
aliases, this patch makes i386 libm function implementations use
libm_alias_float (or libm_alias_float_other in cases where the main
symbol name is defined with versioned_symbol) to define function
aliases.

Tested with build-many-glibcs.py for all its i386 configurations that
installed stripped shared libraries are unchanged by the patch, as
well as running the full glibc testsuite for i686.

	* sysdeps/i386/fpu/s_asinhf.S: Include <libm-alias-float.h>.
	(asinhf): Define using libm_alias_float.
	* sysdeps/i386/fpu/s_atanf.S: Include <libm-alias-float.h>.
	(atanf): Define using libm_alias_float.
	* sysdeps/i386/fpu/s_cbrtf.S: Include <libm-alias-float.h>.
	(cbrtf): Define using libm_alias_float.
	* sysdeps/i386/fpu/s_ceilf.S: Include <libm-alias-float.h>.
	(ceilf): Define using libm_alias_float.
	* sysdeps/i386/fpu/s_copysignf.S: Include <libm-alias-float.h>.
	(copysignf): Define using libm_alias_float.
	* sysdeps/i386/fpu/s_expm1f.S: Include <libm-alias-float.h>.
	(expm1f): Define using libm_alias_float.
	* sysdeps/i386/fpu/s_fabsf.S: Include <libm-alias-float.h>.
	(fabsf): Define using libm_alias_float.
	* sysdeps/i386/fpu/s_floorf.S: Include <libm-alias-float.h>.
	(floorf): Define using libm_alias_float.
	* sysdeps/i386/fpu/s_fmaxf.S: Include <libm-alias-float.h>.
	(fmaxf): Define using libm_alias_float.
	* sysdeps/i386/fpu/s_fminf.S: Include <libm-alias-float.h>.
	(fminf): Define using libm_alias_float.
	* sysdeps/i386/fpu/s_frexpf.S: Include <libm-alias-float.h>.
	(frexpf): Define using libm_alias_float.
	* sysdeps/i386/fpu/s_llrintf.S: Include <libm-alias-float.h>.
	(llrintf): Define using libm_alias_float.
	* sysdeps/i386/fpu/s_logbf.S: Include <libm-alias-float.h>.
	(logbf): Define using libm_alias_float.
	* sysdeps/i386/fpu/s_lrintf.S: Include <libm-alias-float.h>.
	(lrintf): Define using libm_alias_float.
	* sysdeps/i386/fpu/s_nearbyintf.S: Include <libm-alias-float.h>.
	(nearbyintf): Define using libm_alias_float.
	* sysdeps/i386/fpu/s_remquof.S: Include <libm-alias-float.h>.
	(remquof): Define using libm_alias_float.
	* sysdeps/i386/fpu/s_rintf.S: Include <libm-alias-float.h>.
	(rintf): Define using libm_alias_float.
	* sysdeps/i386/fpu/s_truncf.S: Include <libm-alias-float.h>.
	(truncf): Define using libm_alias_float.
	* sysdeps/i386/i686/fpu/multiarch/e_exp2f.c: Include
	<libm-alias-float.h>.
	(exp2f): Define using libm_alias_float, or libm_alias_float_other
	if [SHARED].
	* sysdeps/i386/i686/fpu/multiarch/e_expf.c: Include
	<libm-alias-float.h>.
	(expf): Define using libm_alias_float, or libm_alias_float_other
	if [SHARED].
	* sysdeps/i386/i686/fpu/multiarch/e_log2f.c: Include
	<libm-alias-float.h>.
	(log2f): Define using libm_alias_float, or libm_alias_float_other
	if [SHARED].
	* sysdeps/i386/i686/fpu/multiarch/e_logf.c: Include
	<libm-alias-float.h>.
	(logf): Define using libm_alias_float, or libm_alias_float_other
	if [SHARED].
	* sysdeps/i386/i686/fpu/multiarch/e_powf.c: Include
	<libm-alias-float.h>.
	(powf): Define using libm_alias_float, or libm_alias_float_other
	if [SHARED].
	* sysdeps/i386/i686/fpu/multiarch/s_cosf.c: Include
	<libm-alias-float.h>.
	(cosf): Define using libm_alias_float.
	* sysdeps/i386/i686/fpu/multiarch/s_sincosf.c: Include
	<libm-alias-float.h>.
	(sincosf): Define using libm_alias_float.
	* sysdeps/i386/i686/fpu/multiarch/s_sinf.c: Include
	<libm-alias-float.h>.
	(sinf): Define using libm_alias_float.
	* sysdeps/i386/i686/fpu/s_fmaxf.S: Include <libm-alias-float.h>.
	(fmaxf): Define using libm_alias_float.
	* sysdeps/i386/i686/fpu/s_fminf.S: Include <libm-alias-float.h>.
	(fminf): Define using libm_alias_float.
	* sysdeps/i386/i686/multiarch/s_fmaf.c: Include
	<libm-alias-float.h>.
	(fmaf): Define using libm_alias_float.
 2017-11-29 00:10:35 +00:00
Joseph Myers
bc4e8f9b49 Use libm_alias_double for i386. 
Continuing the preparation for additional _FloatN / _FloatNx function
aliases, this patch makes i386 libm function implementations use
libm_alias_double to define function aliases.

Tested with build-many-glibcs.py for all its i386 configurations that
installed stripped shared libraries are unchanged by the patch, as
well as running the full glibc testsuite for i686.

	* sysdeps/i386/fpu/s_asinh.S: Include <libm-alias-double.h>.
	(asinh): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_atan.S: Include <libm-alias-double.h>.
	(atan): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_cbrt.S: Include <libm-alias-double.h>.
	(cbrt): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_ceil.S: Include <libm-alias-double.h>.
	(ceil): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_copysign.S: Include <libm-alias-double.h>.
	(copysign): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_expm1.S: Include <libm-alias-double.h>.
	(expm1): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_fabs.S: Include <libm-alias-double.h>.
	(fabs): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_fdim.c: Include <libm-alias-double.h>.
	(fdim): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_floor.S: Include <libm-alias-double.h>.
	(floor): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_fmax.S: Include <libm-alias-double.h>.
	(fmax): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_fmin.S: Include <libm-alias-double.h>.
	(fmin): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_frexp.S: Include <libm-alias-double.h>.
	(frexp): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_llrint.S: Include <libm-alias-double.h>.
	(llrint): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_logb.S: Include <libm-alias-double.h>.
	(logb): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_lrint.S: Include <libm-alias-double.h>.
	(lrint): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_nearbyint.S: Include <libm-alias-double.h>.
	(nearbyint): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_remquo.S: Include <libm-alias-double.h>.
	(remquo): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_rint.S: Include <libm-alias-double.h>.
	(rint): Define using libm_alias_double.
	* sysdeps/i386/fpu/s_trunc.S: Include <libm-alias-double.h>.
	(trunc): Define using libm_alias_double.
	* sysdeps/i386/i686/fpu/s_fmax.S: Include <libm-alias-double.h>.
	(fmax): Define using libm_alias_double.
	* sysdeps/i386/i686/fpu/s_fmin.S: Include <libm-alias-double.h>.
	(fmin): Define using libm_alias_double.
	* sysdeps/i386/i686/multiarch/s_fma.c: Include <libm-alias-double.h>.
	(fma): Define using libm_alias_double.
 2017-11-28 18:15:44 +00:00
Joseph Myers
a23aa5b727 Add _Float64x function aliases. 
This patch continues filling out TS 18661-3 support by adding *f64x
function aliases on platforms with _Float64x support.  (It so happens
the set of such platforms is exactly the same as the set of platforms
with _Float128 support, although on x86_64, x86 and ia32 the _Float64x
format is Intel extended rather than binary128.)  The API provided
corresponds exactly to that provided for _Float128, mostly coming from
TS 18661-3.  As these functions always alias those for another type
(long double, _Float128 or both), __* function names are not provided,
as in other cases of alias types.

Given the preparation done in previous patches, this one just enables
the feature via Makeconfig and bits/floatn.h, adds symbol versions,
and updates documentation and ABI baselines.  The symbol versions are
present unconditionally as GLIBC_2.27 in the relevant Versions files,
as it's OK for those to specify versions for functions that may not be
present in some configurations; no additional complexity is needed
unless in future some configuration gains support for this type that
didn't have such support in 2.27.  The Makeconfig additions for ia64
and x86 aren't strictly needed, as those configurations also get
float64x-alias-fcts definitions from
sysdeps/ieee754/float128/Makeconfig, but still seem appropriate given
that _Float64x is not _Float128 for those configurations.

A libm-test-ulps update for x86 is included.  This is because
bits/mathinline.h does not have _Float64x support added and for two
functions the use of out-of-line functions results in increased ulps
(ifloat64x shares ulps with ildouble / ifloat128 as appropriate).
Given that we'd like generally to eliminate bits/mathinline.h
optimizations, preferring to have such optimizations in GCC instead,
it seems reasonable not to add such support there for new types.  GCC
support for _FloatN / _FloatNx built-in functions is limited, but has
been improved in GCC 8, and at some point I hope the full set of libm
built-in functions in GCC, and other optimizations with
per-floating-type aspects, will be enabled for all _FloatN / _FloatNx
types.

Tested for x86_64 and x86, and with build-many-glibcs.py, with both
GCC 6 and GCC 7.

	* sysdeps/ia64/Makeconfig (float64x-alias-fcts): New variable.
	* sysdeps/ieee754/float128/Makeconfig (float64x-alias-fcts):
	Likewise.
	* sysdeps/ieee754/ldbl-128/Makeconfig (float64x-alias-fcts):
	Likewise.
	* sysdeps/x86/Makeconfig: New file.
	* bits/floatn-common.h (__HAVE_FLOAT64X): Remove macro.
	(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
	* bits/floatn.h (__HAVE_FLOAT64X): New macro.
	(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
	* sysdeps/ia64/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
	(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
	* sysdeps/ieee754/ldbl-128/bits/floatn.h (__HAVE_FLOAT64X):
	Likewise.
	(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
	* sysdeps/mips/ieee754/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
	(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
	* sysdeps/powerpc/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
	(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
	* sysdeps/x86/bits/floatn.h (__HAVE_FLOAT64X): Likewise.
	(__HAVE_FLOAT64X_LONG_DOUBLE): Likewise.
	* manual/math.texi (Mathematics): Document support for _Float64x.
	* math/Versions (GLIBC_2.27): Add _Float64x functions.
	* stdlib/Versions (GLIBC_2.27): Likewise.
	* wcsmbs/Versions (GLIBC_2.27): Likewise.
	* sysdeps/unix/sysv/linux/aarch64/libc.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
 2017-11-27 14:16:47 +00:00
Joseph Myers
2ce30701e6 Use libm_alias_ldouble in sysdeps/i386/fpu. 
This patch continues the preparation for additional _FloatN / _FloatNx
function aliases by using libm_alias_ldouble for sysdeps/i386/fpu long
double functions, so that they can have _Float64x aliases added in
future.

Tested for x86_64 (which includes some of these implementations) and
x86, including build-many-glibcs.py tests that installed stripped
shared libraries are unchanged by the patch.

	* sysdeps/i386/fpu/e_expl.S: Include <libm-alias-ldouble.h>.
	[USE_AS_EXPM1L] (expm1l): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_asinhl.S: Include <libm-alias-ldouble.h>.
	(asinhl): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_atanl.c: Include <libm-alias-ldouble.h>.
	(atanl): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_cbrtl.S: Include <libm-alias-ldouble.h>.
	(cbrtl): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_ceill.S: Include <libm-alias-ldouble.h>.
	(ceill): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_copysignl.S: Include <libm-alias-ldouble.h>.
	(copysignl): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_fabsl.S: Include <libm-alias-ldouble.h>.
	(fabsl): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_floorl.S: Include <libm-alias-ldouble.h>.
	(floorl): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_fmaxl.S: Include <libm-alias-ldouble.h>.
	(fmaxl): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_fminl.S: Include <libm-alias-ldouble.h>.
	(fminl): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_frexpl.S: Include <libm-alias-ldouble.h>.
	(frexpl): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_llrintl.S: Include <libm-alias-ldouble.h>.
	(llrintl): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_logbl.c: Include <libm-alias-ldouble.h>.
	(logbl): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_lrintl.S: Include <libm-alias-ldouble.h>.
	(lrintl): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_nearbyintl.S: Include <libm-alias-ldouble.h>.
	(nearbyintl): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_nextafterl.c: Include <libm-alias-ldouble.h>.
	(nextafterl): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_remquol.S: Include <libm-alias-ldouble.h>.
	(remquol): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_rintl.c: Include <libm-alias-ldouble.h>.
	(rintl): Define using libm_alias_ldouble.
	* sysdeps/i386/fpu/s_truncl.S: Include <libm-alias-ldouble.h>.
	(truncl): Define using libm_alias_ldouble.
	* sysdeps/i386/i686/fpu/s_fmaxl.S: Include <libm-alias-ldouble.h>.
	(fmaxl): Define using libm_alias_ldouble.
	* sysdeps/i386/i686/fpu/s_fminl.S: Include <libm-alias-ldouble.h>.
	(fminl): Define using libm_alias_ldouble.
 2017-11-17 22:54:39 +00:00
Adhemerval Zanella
dff91cd45e nptl: Add tests for internal pthread_mutex_t offsets 
This patch adds a new build test to check for internal fields
offsets for user visible internal field.  Although currently
the only field which is statically initialized to a non zero value
is pthread_mutex_t.__data.__kind value, the tests also check the
offset of __kind, __spins, __elision (if supported), and __list
internal member.  A internal header (pthread-offset.h) is added
to each major ABI with the reference value.

Checked on x86_64-linux-gnu and with a build check for all affected
ABIs (aarch64-linux-gnu, alpha-linux-gnu, arm-linux-gnueabihf,
hppa-linux-gnu, i686-linux-gnu, ia64-linux-gnu, m68k-linux-gnu,
microblaze-linux-gnu, mips64-linux-gnu, mips64-n32-linux-gnu,
mips-linux-gnu, powerpc64le-linux-gnu, powerpc-linux-gnu,
s390-linux-gnu, s390x-linux-gnu, sh4-linux-gnu, sparc64-linux-gnu,
sparcv9-linux-gnu, tilegx-linux-gnu, tilegx-linux-gnu-x32,
tilepro-linux-gnu, x86_64-linux-gnu, and x86_64-linux-x32).

	* nptl/pthreadP.h (ASSERT_PTHREAD_STRING,
	ASSERT_PTHREAD_INTERNAL_OFFSET): New macro.
	* nptl/pthread_mutex_init.c (__pthread_mutex_init): Add build time
	checks for internal pthread_mutex_t offsets.
	* sysdeps/aarch64/nptl/pthread-offsets.h
	(__PTHREAD_MUTEX_NUSERS_OFFSET, __PTHREAD_MUTEX_KIND_OFFSET,
	__PTHREAD_MUTEX_SPINS_OFFSET, __PTHREAD_MUTEX_ELISION_OFFSET,
	__PTHREAD_MUTEX_LIST_OFFSET): New macro.
	* sysdeps/alpha/nptl/pthread-offsets.h: Likewise.
	* sysdeps/arm/nptl/pthread-offsets.h: Likewise.
	* sysdeps/hppa/nptl/pthread-offsets.h: Likewise.
	* sysdeps/i386/nptl/pthread-offsets.h: Likewise.
	* sysdeps/ia64/nptl/pthread-offsets.h: Likewise.
	* sysdeps/m68k/nptl/pthread-offsets.h: Likewise.
	* sysdeps/microblaze/nptl/pthread-offsets.h: Likewise.
	* sysdeps/mips/nptl/pthread-offsets.h: Likewise.
	* sysdeps/nios2/nptl/pthread-offsets.h: Likewise.
	* sysdeps/powerpc/nptl/pthread-offsets.h: Likewise.
	* sysdeps/s390/nptl/pthread-offsets.h: Likewise.
	* sysdeps/sh/nptl/pthread-offsets.h: Likewise.
	* sysdeps/sparc/nptl/pthread-offsets.h: Likewise.
	* sysdeps/tile/nptl/pthread-offsets.h: Likewise.
	* sysdeps/x86_64/nptl/pthread-offsets.h: Likewise.

Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
 2017-11-07 09:48:28 -02:00
H.J. Lu
95b93c6e0d x86: Add sysdeps/x86/sysdep.h 
Add a new header file, sysdeps/x86/sysdep.h, for common assembly code
macros between i386 and x86-64.  Tested on i686 and x86-64.  There are
no differences in outputs of "readelf -a" and "objdump -dw" on all glibc
shared objects before and after the patch.

	* sysdeps/i386/sysdep.h: Include <sysdeps/x86/sysdep.h> instead
	of <sysdeps/generic/sysdep.h>.
	(ALIGNARG): Removed.
	(ASM_SIZE_DIRECTIVE): Likewise.
	(ENTRY): Likewise.
	(END): Likewise.
	(ENTRY_CHK): Likewise.
	(END_CHK): Likewise.
	(syscall_error): Likewise.
	(mcount): Likewise.
	(PSEUDO_END): Likewise.
	(L): Likewise.
	(atom_text_section): Likewise.
	* sysdeps/x86/sysdep.h: New file.
	* sysdeps/x86_64/sysdep.h: Include <sysdeps/x86/sysdep.h> instead
	of <sysdeps/generic/sysdep.h>.
	(ALIGNARG): Removed.
	(ASM_SIZE_DIRECTIVE): Likewise.
	(ENTRY): Likewise.
	(END): Likewise.
	(ENTRY_CHK): Likewise.
	(END_CHK): Likewise.
	(syscall_error): Likewise.
	(mcount): Likewise.
	(PSEUDO_END): Likewise.
	(L): Likewise.
	(atom_text_section): Likewise.
 2017-11-01 05:37:26 -07:00
H.J. Lu
c5cc45148c i586: Use conditional branches in strcpy.S [BZ #22353] 
i586 strcpy.S used a clever trick with LEA to implement jump table:

/* ECX has the last 2 bits of the address of source - 1.  */
	andl	$3, %ecx

        call    2f
2:      popl    %edx
	/* 0xb is the distance between 2: and 1:.  */
        leal    0xb(%edx,%ecx,8), %ecx
        jmp     *%ecx

        .align 8
1:  /* ECX == 0 */
        orb     (%esi), %al
        jz      L(end)
        stosb
        xorl    %eax, %eax
        incl    %esi
    /* ECX == 1 */
        orb     (%esi), %al
        jz      L(end)
        stosb
        xorl    %eax, %eax
        incl    %esi
    /* ECX == 2 */
        orb     (%esi), %al
        jz      L(end)
        stosb
        xorl    %eax, %eax
        incl    %esi
    /* ECX == 3 */
L(1):   movl    (%esi), %ecx
        leal    4(%esi),%esi

This fails if there are instruction length changes before L(1):.  This
patch replaces it with conditional branches:

	cmpb	$2, %cl
	je	L(Src2)
	ja	L(Src3)
	cmpb	$1, %cl
	je	L(Src1)

L(Src0):

which have similar performance and work with any instruction lengths.

Tested on i586 and i686 with and without --disable-multi-arch.

	[BZ #22353]
	* sysdeps/i386/i586/strcpy.S (STRCPY): Use conditional branches.
	(1): Renamed to ...
	(L(Src0)): This.
	(L(Src1)): New.
	(L(Src2)): Likewise.
	(L(1)): Renamed to ...
	(L(Src3)): This.
 2017-10-30 10:02:30 -07:00
H.J. Lu
63d3b468c1 i386: Regenerate libm-test-ulps for for gcc 7 
Regenerate libm-test-ulps for gcc 7 with "-m32 -O2 -march=i586".

	* sysdeps/i386/fpu/libm-test-ulps: Regenerated for GCC 7 with
	"-O2 -march=i586".
 2017-10-27 14:09:14 -07:00
H.J. Lu
5313581cb5 i386: Replace assembly versions of e_powf with generic e_powf.c 
This patch replaces i386 assembly versions of e_powf with generic
e_powf.c.  For workload-spec2017.wrf, on Nehalem, it improves
performance by:

                           Before            After     Improvement
reciprocal-throughput      230.855          78.3358       194%
latency                    231.685          94.1259       146%

On Skylake, it improves performance by:

                           Before            After     Improvement
reciprocal-throughput      239.858          47.4713       405%
latency                    247.57           93.8798       163%

On IvyBridge with --disable-multi-arch, it improves performance by:

                           Before            After     Improvement
reciprocal-throughput      269.078          63.3758       324%
latency                    271.473          102.091       165%

	* sysdeps/i386/fpu/e_powf.S: Removed.
	* sysdeps/i386/fpu/e_powf_log2_data.c: Likewise.
	* sysdeps/i386/fpu/w_powf.c: Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Updated for generic e_powf.c.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/Makefile (libm-sysdep_routines):
	Add e_powf-sse2.
	(CFLAGS-e_powf-sse2.c): New.
	* sysdeps/i386/i686/fpu/multiarch/e_powf-sse2.c: New file.
	* sysdeps/i386/i686/fpu/multiarch/e_powf.c: Likewise.
 2017-10-22 08:12:41 -07:00
H.J. Lu
6089a3ee24 i386: Replace assembly versions of e_log2f with generic e_log2f.c 
This patch replaces i386 assembly versions of e_log2f with generic
e_log2f.c.  For workload-spec2017.wrf, on Nehalem, it improves
performance by:

                           Before            After     Improvement
reciprocal-throughput      92.3845          30.8752       199%
latency                    112.855          54.8645       105%

On Skylake, it improves performance by:

                           Before            After     Improvement
reciprocal-throughput      98.7488          22.7507       334%
latency                    118.01           51.6083       128%

On IvyBridge with --disable-multi-arch, it improves performance by:

                           Before            After     Improvement
reciprocal-throughput      106.635          28.8596       269%
latency                    129.888          56.9187       128%

	* sysdeps/i386/fpu/e_log2f.S: Removed.
	* sysdeps/i386/fpu/e_log2f_data.c: Likewise.
	* sysdeps/i386/fpu/w_log2f.c: Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Updated for generic e_log2f.c.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/Makefile (libm-sysdep_routines):
	Add e_log2f-sse2.
	(CFLAGS-e_log2f-sse2.c): New.
	* sysdeps/i386/i686/fpu/multiarch/e_log2f-sse2.c: New file.
	* sysdeps/i386/i686/fpu/multiarch/e_log2f.c: Likewise.
 2017-10-22 08:10:18 -07:00
H.J. Lu
fe596486d6 i386: Replace assembly versions of e_logf with generic e_logf.c 
This patch replaces i386 assembly versions of e_logf with generic
e_logf.c.  For workload-spec2017.wrf, on Nehalem, it improves
performance by:

                           Before            After     Improvement
reciprocal-throughput      73.3865          40.0454       83%
latency                    90.0985          54.4479       65%

On Skylake, it improves performance by:

                           Before            After     Improvement
reciprocal-throughput      75.1384          22.1452       239%
latency                    91.9441          50.7925       81%

On IvyBridge with --disable-multi-arch, it improves performance by:

                           Before            After     Improvement
reciprocal-throughput      84.5575          28.7879       193%
latency                    103.971          57.5231       80%

	* sysdeps/i386/fpu/e_logf.S: Removed.
	* sysdeps/i386/fpu/e_logf_data.c: Likewise.
	* sysdeps/i386/fpu/w_logf.c: Likewise.
	* sysdeps/i386/i686/fpu/e_logf.S: Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Updated for generic e_logf.c.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/Makefile (libm-sysdep_routines):
	Add e_logf-sse2.
	(CFLAGS-e_logf-sse2.c): New.
	* sysdeps/i386/i686/fpu/multiarch/e_logf-sse2.c: New file.
	* sysdeps/i386/i686/fpu/multiarch/e_logf.c: Likewise.
 2017-10-22 08:02:58 -07:00
H.J. Lu
7eda65f69e i386: Replace assembly versions of e_exp2f with generic e_exp2f.c 
This patch replaces i386 assembly versions of e_exp2f with generic
e_exp2f.c.  For workload-spec2017.wrf, on Nehalem, it improves
performance by:

                           Before            After     Improvement
reciprocal-throughput      112.996          40.0454       182%
latency                    126.581          54.4479       132%

On Skylake, it improves performance by:

                           Before            After     Improvement
reciprocal-throughput      113.14           39.447        186%
latency                    136.068          55.684        144%

On IvyBridge with --disable-multi-arch, it improves performance by:

                           Before            After     Improvement
reciprocal-throughput      132.521          40.3759       228%
latency                    145.791          58.4587       149%

	* sysdeps/i386/fpu/e_exp2f.S: Removed.
	* sysdeps/i386/fpu/w_exp2f.c: Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Updated for generic e_exp2f.c.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/Makefile (libm-sysdep_routines):
	Add e_exp2f-sse2.
	(CFLAGS-e_exp2f-sse2.c): New.
	* sysdeps/i386/i686/fpu/multiarch/e_exp2f-sse2.c: New file.
	* sysdeps/i386/i686/fpu/multiarch/e_exp2f.c: Likewise.
 2017-10-22 08:00:18 -07:00
H.J. Lu
b2f6137ea5 i386: Replace assembly versions of e_expf with generic e_expf.c 
This patch replaces i386 assembly versions of e_expf with generic
e_expf.c.  For workload-spec2017.wrf, on Nehalem, it improves
performance by:

                           Before            After     Improvement
reciprocal-throughput      55.5724          40.2664       38%
latency                    80.0687          60.8517       31%

On Skylake, it improves performance by:

                           Before            After     Improvement
reciprocal-throughput      62.4056          39.4188       58%
latency                    85.5496          59.6377       43%

On IvyBridge with --disable-multi-arch, it improves performance by:

                           Before            After     Improvement
reciprocal-throughput      133.707          40.3778       231%
latency                    149.191          63.2515       135%

	* sysdeps/i386/fpu/e_exp2f_data.c: Removed.
	* sysdeps/i386/fpu/e_expf.S: Likewise.
	* sysdeps/i386/fpu/math_errf.c: Likewise.
	* sysdeps/i386/fpu/w_expf.c: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/e_expf-ia32.S: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/e_expf-sse2.S: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/w_expf.c: Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Updated for generic e_expf.c.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/Makefile (libm-sysdep_routines):
	Remove e_expf-ia32.
	(CFLAGS-e_expf-sse2.c): New.
	* sysdeps/i386/i686/fpu/multiarch/e_expf-sse2.c: New file.
	* sysdeps/i386/i686/fpu/multiarch/e_expf.c: Rewritten.
 2017-10-22 07:54:50 -07:00
H.J. Lu
95ccb619f5 i386: Regenerate libm-test-ulps 
Regenerate libm-test-ulps for --disable-multi-arch.

	* sysdeps/i386/fpu/libm-test-ulps: Regenerated.
 2017-10-19 11:51:57 -07:00
H.J. Lu
ee417882e0 Don't use hidden visibility in libc.a with PIE on i386 
On i386, when multi-arch is enabled, all external functions must be
called via PIC PLT in PIE, which requires setting up EBX register,
since they may be IFUNC functions.

	* config.h.in (NO_HIDDEN_EXTERN_FUNC_IN_PIE): New.
	* include/libc-symbols.h (__hidden_proto_hiddenattr): Add check
	for PIC and NO_HIDDEN_EXTERN_FUNC_IN_PIE.
	* sysdeps/i386/configure.ac (NO_HIDDEN_EXTERN_FUNC_IN_PIE): New
	AC_DEFINE if multi-arch is enabled.
	* sysdeps/i386/configure: Regenerated.
 2017-10-04 17:18:42 -07:00
H.J. Lu
955774751b i386: Use "movl main@GOT(%ebx), %eax" in start.S 
Don't use "leal main@GOTOFF(%ebx), %eax" since main may be in a
shared object.  Linker will convert "movl main@GOT(%ebx), %eax"
to "leal main@GOTOFF(%ebx), %eax" if main is defined locally.

	* sysdeps/i386/start.S: Replace "leal main@GOT(%ebx), %eax" with
	"movl main@GOTOFF(%ebx), %eax".
 2017-10-03 17:54:30 -07:00
H.J. Lu
02d2d8927d Revert x86: Allow undefined _DYNAMIC in static executable 
This code is used in non-PIE static executable and static PIE.  It checks
if _DYNAMIC is undefined before using it to compute load address.  But
not all targets can convert access _DYNAMIC via GOT, which needs dynamic
relocation, to PC-relative at link-time.

	* sysdeps/i386/dl-machine.h (elf_machine_load_address): Don't
	allow undefined _DYNAMIC in PIE libc.a.
	* sysdeps/x86_64/dl-machine.h (elf_machine_load_address):
	Likewse.
 2017-10-03 17:49:09 -07:00
Szabolcs Nagy
bd4430c2a6 Do not wrap logf, log2f and powf 
The new generic logf, log2f and powf code don't need wrappers any more,
they set errno inline so only use the wrappers on targets that need it.

	* sysdeps/ieee754/flt-32/e_log2f.c (__log2f): Define without wrapper.
	* sysdeps/ieee754/flt-32/e_logf.c (__logf): Likewise
	* sysdeps/ieee754/flt-32/e_powf.c (__powf): Likewise
	* sysdeps/ieee754/flt-32/w_log2f.c: New file.
	* sysdeps/ieee754/flt-32/w_logf.c: New file.
	* sysdeps/ieee754/flt-32/w_powf.c: New file.
	* sysdeps/i386/fpu/w_log2f.c: New file.
	* sysdeps/i386/fpu/w_logf.c: New file.
	* sysdeps/i386/fpu/w_powf.c: New file.
	* sysdeps/m68k/m680x0/fpu/w_log2f.c: New file.
	* sysdeps/m68k/m680x0/fpu/w_logf.c: New file.
	* sysdeps/m68k/m680x0/fpu/w_powf.c: New file.
 2017-10-02 14:39:38 +01:00
Szabolcs Nagy
f7a0b063e7 Do not wrap expf and exp2f 
The new generic expf and exp2f code don't need wrappers any more, they
set errno inline, so only use the wrappers on targets that need it.
(If the wrapper is needed, then the top level wrapper code is included,
otherwise empty w_exp*f.c is used to suppress the wrapper.)

A powerpc64 expf implementation includes the expf c code directly which
needed some changes.

	* sysdeps/ieee754/flt-32/e_exp2f.c (__exp2f): Define without wrapper.
	* sysdeps/ieee754/flt-32/e_expf.c (__expf): Likewise
	* sysdeps/ieee754/flt-32/w_exp2f.c: New file.
	* sysdeps/ieee754/flt-32/w_expf.c: New file.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/e_expf-ppc64.c: Update for
	the new expf code.
	* sysdeps/powerpc/powerpc64/fpu/multiarch/w_expf.c: New file.
	* sysdeps/powerpc/powerpc64/power8/fpu/w_expf.c: New file.
	* sysdeps/m68k/m680x0/fpu/w_exp2f.c: New file.
	* sysdeps/m68k/m680x0/fpu/w_expf.c: New file.
	* sysdeps/i386/fpu/w_exp2f.c: New file.
	* sysdeps/i386/fpu/w_expf.c: New file.
	* sysdeps/i386/i686/fpu/multiarch/w_expf.c: New file.
	* sysdeps/x86_64/fpu/w_expf.c: New file.
 2017-10-02 14:38:54 +01:00
H.J. Lu
8bcdb7e0c5 Mark internal functions with attribute_hidden [BZ #18822] 
Mark internal functions with attribute_hidden to allow direct access to
internal functions within libc.so and libc.a without using GOT nor PLT.

Size comparison of libc.so:

On x86-64:
        text	   data	    bss	    dec	    hex
Before: 1728577	  20584	  17088	1766249	 1af369
After : 1728593	  20584	  17088	1766265	 1af379

The only change is __gconv_release_shlib in iconv/gconv_dl.c is inlined
since it is hidden, which increases the code size of gconv_dl.os by 18
bytes.

On i686:
        text	   data	    bss	    dec	    hex
Before: 1869039	  11444	  11112	1891595	 1cdd0b
After : 1868635	  11444	  11112	1891191	 1cdb77

The code size is decreased by avoiding GOT/PLT for hidden functions.

	[BZ #18822]
	* iconv/gconv_int.h (__gconv_open): Add attribute_hidden.
	(__gconv_close): Likewise.
	(__gconv): Likewise.
	(__gconv_find_transform): Likewise.
	(__gconv_lookup_cache): Likewise.
	(__gconv_compare_alias_cache): Likewise.
	(__gconv_load_cache): Likewise.
	(__gconv_get_path): Likewise.
	(__gconv_close_transform): Likewise.
	(__gconv_release_cache): Likewise.
	(__gconv_find_shlib): Likewise.
	(__gconv_release_shlib): Likewise.
	(__gconv_get_builtin_trans): Likewise.
	(__gconv_compare_alias): Likewise.
	* include/dlfcn.h (_dlerror_run): Likewise.
	* include/stdio.h (__fortify_fail_abort): Likewise.
	* include/time.h (__tz_compute): Likewise.
	(__strptime_internal): Likewise.
	* intl/gettextP.h (_nl_find_domain): Likewise.
	(_nl_load_domain): Likewise.
	(_nl_find_msg): Likewise.
	* intl/plural-exp.h (FREE_EXPRESSION): Likewise.
	(EXTRACT_PLURAL_EXPRESSION): Likewise.
	* locale/coll-lookup.h (__collidx_table_lookup): Likewise.
	* resolv/gai_misc.h (__gai_enqueue_request): Likewise.
	(__gai_find_request): Likewise.
	(__gai_remove_request): Likewise.
	(__gai_notify): Likewise.
	(__gai_notify_only): Likewise.
	* sysdeps/generic/aio_misc.h (__aio_sigqueue): Likewise.
	* sysdeps/generic/ldsodefs.h (_dl_fini): Likewise.
	(_dl_non_dynamic_init): Likewise.
	(_dl_aux_init): Likewise.
	* sysdeps/i386/machine-gmon.h (mcount_internal): Likewise.
	* sysdeps/unix/sysv/linux/i386/olddirent.h (__old_getdents64):
	Likewise.
	* wcsmbs/wcsmbsload.h (__wcsmbs_load_conv): Likewise.
	(__wcsmbs_clone_conv): Likewise.
	(__wcsmbs_named_conv): Likewise.
 2017-10-01 15:07:23 -07:00
Szabolcs Nagy
4ea49f4c08 New generic powf 
without wrapper on aarch64:
powf reciprocal-throughput: 4.2x faster
powf latency: 2.6x faster
old worst-case error: 1.11 ulp
new worst-case error: 0.82 ulp
aarch64 .text size: -780 bytes
aarch64 .rodata size: +144 bytes

powf(x,y) is implemented as exp2(y*log2(x)) with the same algorithms
that are used in exp2f and log2f, except that the log2f polynomial is
larger for extra precision and its output (and exp2f input) may be
scaled by a power of 2 (POWF_SCALE) to simplify the argument reduction
step of exp2 (possible when efficient round and convert toint operation
is available).

The special case handling tries to minimize the checks in the hot path.
When the input of exp2_inline is checked, int arithmetics is used as
that was faster on the tested aarch64 cores.

	* math/Makefile (type-float-routines): Add e_powf_log2_data.
	* sysdeps/ieee754/flt-32/e_powf.c: New implementation.
	* sysdeps/ieee754/flt-32/e_powf_log2_data.c: New file.
	* sysdeps/ieee754/flt-32/math_config.h (__powf_log2_data): Define.
	(issignalingf_inline): Likewise.
	(POWF_LOG2_TABLE_BITS): Likewise.
	(POWF_LOG2_POLY_ORDER): Likewise.
	(POWF_SCALE_BITS): Likewise.
	(POWF_SCALE): Likewise.
	* sysdeps/i386/fpu/e_powf_log2_data.c: New file.
	* sysdeps/ia64/fpu/e_powf_log2_data.c: New file.
	* sysdeps/m68k/m680x0/fpu/e_powf_log2_data.c: New file.
 2017-09-29 17:30:53 +01:00
Szabolcs Nagy
875c76c704 New generic log2f 
Similar to the new logf: double precision arithmetics and a small
lookup table is used. The argument reduction step is the same as in
the new logf.

without wrapper on aarch64:
log2f reciprocal-throughput: 2.3x faster
log2f latency: 2.1x faster
old worst case error: 1.72 ulp
new worst case error: 0.75 ulp
aarch64 .text size: -252 bytes
aarch64 .rodata size: +244 bytes

	* math/Makefile (type-float-routines): Add e_log2f_data.
	* sysdeps/ieee754/flt-32/e_log2f.c: New implementation.
	* sysdeps/ieee754/flt-32/e_log2f_data.c: New file.
	* sysdeps/ieee754/flt-32/math_config.h (__log2f_data): Define.
	(LOG2F_TABLE_BITS, LOG2F_POLY_ORDER): Define.
	* sysdeps/i386/fpu/e_log2f_data.c: New file.
	* sysdeps/ia64/fpu/e_log2f_data.c: New file.
	* sysdeps/m68k/m680x0/fpu/e_log2f_data.c: New file.
 2017-09-29 17:17:41 +01:00
Szabolcs Nagy
bf27d3973d New generic logf 
without wrapper on aarch64:
logf reciprocal-throughput: 2.2x faster
logf latency: 1.9x faster
old worst case error: 0.89 ulp
new worst case error: 0.82 ulp
aarch64 .text size: -356 bytes
aarch64 .rodata size: +240 bytes

Uses double precision arithmetics and a lookup table to allow smaller
polynomial and avoid the use of division.

Data is in a separate translation unit with fixed layout to prevent the
compiler generating suboptimal literal access.

Errors are handled inline according to POSIX rules, but this patch
keeps the wrapper with SVID compatible error handling.

Needs libm-test-ulps adjustment for clogf in non-nearest rounding mode.

	* math/Makefile (type-float-routines): Add e_logf_data.
	* sysdeps/ieee754/flt-32/e_logf.c: New implementation.
	* sysdeps/ieee754/flt-32/e_logf_data.c: New file.
	* sysdeps/ieee754/flt-32/math_config.h (__logf_data): Define.
	(LOGF_TABLE_BITS, LOGF_POLY_ORDER): Define.
	* sysdeps/i386/fpu/e_logf_data.c: New file.
	* sysdeps/ia64/fpu/e_logf_data.c: New file.
	* sysdeps/m68k/m680x0/fpu/e_logf_data.c: New file.
 2017-09-29 11:46:46 +01:00
H.J. Lu
4088d8dd29 x86: Allow undefined _DYNAMIC in static executable 
When --enable-static-pie is used to build static PIE, _DYNAMIC is used
to compute the load address of static PIE.  But _DYNAMIC is undefined
when creating static executable.  This patch makes _DYNAMIC weak in PIE
libc.a so that it can be undefined.

	* sysdeps/i386/dl-machine.h (elf_machine_load_address): Allow
	undefined _DYNAMIC in PIE libc.a.
	* sysdeps/x86_64/dl-machine.h (elf_machine_load_address):
	Likewse.
 2017-09-28 15:28:12 -07:00
Szabolcs Nagy
72aa623345 Optimized generic expf and exp2f with wrappers 
Based on new expf and exp2f code from
https://github.com/ARM-software/optimized-routines/

with wrapper on aarch64:
expf reciprocal-throughput: 2.3x faster
expf latency: 1.7x faster
without wrapper on aarch64:
expf reciprocal-throughput: 3.3x faster
expf latency: 1.7x faster
without wrapper on aarch64:
exp2f reciprocal-throughput: 2.8x faster
exp2f latency: 1.3x faster
libm.so size on aarch64:
.text size: -152 bytes
.rodata size: -1740 bytes
expf/exp2f worst case nearest rounding error: 0.502 ulp
worst case non-nearest rounding error: 1 ulp

Error checks are inline and errno setting is in separate tail called
functions, but the wrappers are kept in this patch to handle the
_LIB_VERSION==_SVID_ case.  (So e.g. errno is set twice for expf calls
and once for __expf_finite calls on targets where the new code is used.)

Double precision arithmetics is used which is expected to be faster on
most targets (including soft-float) than using single precision and it
is easier to get good precision result with it.

Const data is kept in a separate translation unit which complicates
maintenance a bit, but is expected to give good code for literal loads
on most targets and allows sharing data across expf, exp2f and powf.
(This data is disabled on i386, m68k and ia64 which have their own
expf, exp2f and powf code.)

Some details may need target specific tweaks:
- best convert and round to int operation in the arg reduction may be
different across targets.
- code was optimized on fma target, optimal polynomial eval may be
different without fma.
- gcc does not always generate good code for fp bit representation
access via unions or it may be inherently slow on some targets.

The libm-test-ulps will need adjustment because..
- The argument reduction ideally uses nearest rounded rint, but that is
not efficient on most targets, so the polynomial can get evaluated on a
wider interval in non-nearest rounding mode making 1 ulp errors common
in that case.
- The polynomial is evaluated such that it may have 1 ulp error on
negative tiny inputs with upward rounding.

	* math/Makefile (type-float-routines): Add math_errf and e_exp2f_data.
	* sysdeps/aarch64/fpu/math_private.h (TOINT_INTRINSICS): Define.
	(roundtoint, converttoint): Likewise.
	* sysdeps/ieee754/flt-32/e_expf.c: New implementation.
	* sysdeps/ieee754/flt-32/e_exp2f.c: New implementation.
	* sysdeps/ieee754/flt-32/e_exp2f_data.c: New file.
	* sysdeps/ieee754/flt-32/math_config.h: New file.
	* sysdeps/ieee754/flt-32/math_errf.c: New file.
	* sysdeps/ieee754/flt-32/t_exp2f.h: Remove.
	* sysdeps/i386/fpu/e_exp2f_data.c: New file.
	* sysdeps/i386/fpu/math_errf.c: New file.
	* sysdeps/ia64/fpu/e_exp2f_data.c: New file.
	* sysdeps/ia64/fpu/math_errf.c: New file.
	* sysdeps/m68k/m680x0/fpu/e_exp2f_data.c: New file.
	* sysdeps/m68k/m680x0/fpu/math_errf.c: New file.
 2017-09-25 10:44:39 +01:00
Wilco Dijkstra
ca3a382ea3 Enable unwind info in libc-start.c and backtrace.c 
Add unwind info to __libc_start_main so that unwinding continues one
extra level to _start.  Similarly add unwind info to backtrace.
Given many targets require this, do this in a general way.

	* csu/Makefile: Add -funwind-tables to libc-start.c.
	* debug/Makefile: Add -funwind-tables to backtrace.c.
	* sysdeps/aarch64/Makefile: Remove CFLAGS-backtrace.c.
	* sysdeps/arm/Makefile: Likewise.
	* sysdeps/i386/Makefile: Likewise.
	* sysdeps/m68k/Makefile: Likewise.
	* sysdeps/mips/Makefile: Likewise.
	* sysdeps/nios2/Makefile: Likewise.
	* sysdeps/sh/Makefile: Likewise.
	* sysdeps/sparc/Makefile: Likewise.
 2017-09-19 15:07:58 +01:00
Adhemerval Zanella
65687ac76c Remove remaining _HAVE_STRING_ARCH_* definitions (BZ #18858) 
Since the removal of bits/string.h, _HAVE_STRING_ARCH_* are no
longer used.  This patch removes the unused macros from i686
and x86_64 sysdeps folder.

Checked on x86_64-linux-gnu and i686-linux-gnu.

	* sysdeps/i386/i686/multiarch/strncpy.c (_HAVE_STRING_ARCH_strncpy):
	Remove define.
	* sysdeps/x86_64/multiarch/stpcpy.c (_HAVE_STRING_ARCH_stpcpy):
	Likewise.
	* sysdeps/x86_64/multiarch/strcspn.c (_HAVE_STRING_ARCH_strcspn):
	Likewise.
	* sysdeps/x86_64/multiarch/strncat.c (_HAVE_STRING_ARCH_strncat):
	Likewise.
	* sysdeps/x86_64/multiarch/strncpy.c (_HAVE_STRING_ARCH_strncpy):
	Likewise.
	* sysdeps/x86_64/multiarch/strpbrk.c (_HAVE_STRING_ARCH_strpbrk):
	Likewise.
	* sysdeps/x86_64/multiarch/strspn.c (_HAVE_STRING_ARCH_strspn):
	Likewise.
 2017-09-06 14:35:23 -03:00
Joseph Myers
4f3647e46e Prefer new libm function wrappers for !LIBM_SVID_COMPAT. 
The initial obsoletion of SVID libm error handling left the old
wrappers and __kernel_standard still being used for new ports and
static linking, just with macro definitions of _LIB_VERSION and
matherr that meant symbols with those names were never actually used
and the code for different error handling variants could be optimized
out.

This patch cleans things up further by eliminating the
__kernel_standard use for new ports and static linking.  Now, the old
wrappers no longer generate any code in the !LIBM_SVID_COMPAT case,
while the new errno-only wrappers that were added for float128 support
are now also used for float, double and long double in that case.

The changes are generally straightforward.  The w_scalb*_compat
wrappers continue to be used (scalb is obsolescent in the sense of not
being supported for float128, but is present in supported standards -
the 2001 edition of POSIX and earlier XSI versions - so remains
supported for static linking and new ports, as do the float and long
double variants that are existing GNU extensions).  Those wrappers
would only call __kernel_standard in the _LIB_VERSION == _SVID_ case.
Since we would like to be able to compile most of glibc without
optimization, relying on a static function whose only use is under an
if (0) condition being optimized away to avoid an undefined
__kernel_standard reference may not be a good idea.  Thus, the
relevant code in the scalb wrappers has LIBM_SVID_COMPAT conditionals
added to guarantee it's not built at all in the case where
__kernel_standard does not exist.

Just as i386 has its own w_sqrt_compat.c, so w_sqrt.c is also added.
ia64 gets dummy w_*.c to prevent those files being built where they
would conflict with the ia64 libm, as with its existing w_*_compat.c.

Conditions disabling code for !LIBM_SVID_COMPAT are needed in both the
math/ wrappers and in the long double wrappers in ldbl-opt (to avoid
them setting up aliases and symbol versions for undefined symbols).  I
hope that future cleanups to how libm function aliases and symbol
versioning are done will eliminate the need for most of the ldbl-opt
wrappers.

Tested for x86_64 and x86, and with build-many-glibcs.py.

	* sysdeps/generic/math-type-macros-double.h: Include
	<math-svid-compat.h>.
	(__USE_WRAPPER_TEMPLATE): Define to !LIBM_SVID_COMPAT.
	* sysdeps/generic/math-type-macros-float.h: Include
	<math-svid-compat.h>.
	(__USE_WRAPPER_TEMPLATE): Define to !LIBM_SVID_COMPAT.
	* sysdeps/generic/math-type-macros-ldouble.h: Include
	<math-svid-compat.h>.
	(__USE_WRAPPER_TEMPLATE): Define to !LIBM_SVID_COMPAT.
	* math/lgamma-compat.h (BUILD_LGAMMA): Include LIBM_SVID_COMPAT
	condition.
	* math/w_acos_compat.c: Condition contents on [LIBM_SVID_COMPAT].
	* math/w_acosf_compat.c: Likewise.
	* math/w_acosh_compat.c: Likewise.
	* math/w_acoshf_compat.c: Likewise.
	* math/w_acoshl_compat.c: Likewise.
	* math/w_acosl_compat.c: Likewise.
	* math/w_asin_compat.c: Likewise.
	* math/w_asinf_compat.c: Likewise.
	* math/w_asinl_compat.c: Likewise.
	* math/w_atan2_compat.c: Likewise.
	* math/w_atan2f_compat.c: Likewise.
	* math/w_atan2l_compat.c: Likewise.
	* math/w_atanh_compat.c: Likewise.
	* math/w_atanhf_compat.c: Likewise.
	* math/w_atanhl_compat.c: Likewise.
	* math/w_cosh_compat.c: Likewise.
	* math/w_coshf_compat.c: Likewise.
	* math/w_coshl_compat.c: Likewise.
	* math/w_exp10_compat.c: Likewise.
	* math/w_exp10f_compat.c: Likewise.
	* math/w_exp10l_compat.c: Likewise.
	* math/w_exp2_compat.c: Likewise.
	* math/w_exp2f_compat.c: Likewise.
	* math/w_exp2l_compat.c: Likewise.
	* math/w_fmod_compat.c: Likewise.
	* math/w_fmodf_compat.c: Likewise.
	* math/w_fmodl_compat.c: Likewise.
	* math/w_hypot_compat.c: Likewise.
	* math/w_hypotf_compat.c: Likewise.
	* math/w_hypotl_compat.c: Likewise.
	* math/w_j0_compat.c: Likewise.
	* math/w_j0f_compat.c: Likewise.
	* math/w_j0l_compat.c: Likewise.
	* math/w_j1_compat.c: Likewise.
	* math/w_j1f_compat.c: Likewise.
	* math/w_j1l_compat.c: Likewise.
	* math/w_jn_compat.c: Likewise.
	* math/w_jnf_compat.c: Likewise.
	* math/w_jnl_compat.c: Likewise.
	* math/w_lgamma_r_compat.c: Likewise.
	* math/w_lgammaf_r_compat.c: Likewise.
	* math/w_lgammal_r_compat.c: Likewise.
	* math/w_log10_compat.c: Likewise.
	* math/w_log10f_compat.c: Likewise.
	* math/w_log10l_compat.c: Likewise.
	* math/w_log2_compat.c: Likewise.
	* math/w_log2f_compat.c: Likewise.
	* math/w_log2l_compat.c: Likewise.
	* math/w_log_compat.c: Likewise.
	* math/w_logf_compat.c: Likewise.
	* math/w_logl_compat.c: Likewise.
	* math/w_pow_compat.c: Likewise.
	* math/w_powf_compat.c: Likewise.
	* math/w_powl_compat.c: Likewise.
	* math/w_remainder_compat.c: Likewise.
	* math/w_remainderf_compat.c: Likewise.
	* math/w_remainderl_compat.c: Likewise.
	* math/w_sinh_compat.c: Likewise.
	* math/w_sinhf_compat.c: Likewise.
	* math/w_sinhl_compat.c: Likewise.
	* math/w_sqrt_compat.c: Likewise.
	* math/w_sqrtf_compat.c: Likewise.
	* math/w_sqrtl_compat.c: Likewise.
	* math/w_tgamma_compat.c: Likewise.
	* math/w_tgammaf_compat.c: Likewise.
	* math/w_tgammal_compat.c: Likewise.
	* math/w_scalb_compat.c (sysv_scalb): Condition definition on
	[LIBM_SVID_COMPAT].
	(__scalb): Condition call to sysv_scalb on [LIBM_SVID_COMPAT].
	* math/w_scalbf_compat.c (sysv_scalbf): Condition definition on
	[LIBM_SVID_COMPAT].
	(__scalbf): Condition call to sysv_scalbf on [LIBM_SVID_COMPAT].
	* math/w_scalbl_compat.c (sysv_scalbl): Condition definition on
	[LIBM_SVID_COMPAT].
	(__scalbl): Condition call to sysv_scalbl on [LIBM_SVID_COMPAT].
	* sysdeps/i386/fpu/w_sqrt.c: New file.
	* sysdeps/ia64/fpu/w_acos.c: Likewise.
	* sysdeps/ia64/fpu/w_acosf.c: Likewise.
	* sysdeps/ia64/fpu/w_acosh.c: Likewise.
	* sysdeps/ia64/fpu/w_acoshf.c: Likewise.
	* sysdeps/ia64/fpu/w_acoshl.c: Likewise.
	* sysdeps/ia64/fpu/w_acosl.c: Likewise.
	* sysdeps/ia64/fpu/w_asin.c: Likewise.
	* sysdeps/ia64/fpu/w_asinf.c: Likewise.
	* sysdeps/ia64/fpu/w_asinl.c: Likewise.
	* sysdeps/ia64/fpu/w_atan2.c: Likewise.
	* sysdeps/ia64/fpu/w_atan2f.c: Likewise.
	* sysdeps/ia64/fpu/w_atan2l.c: Likewise.
	* sysdeps/ia64/fpu/w_atanh.c: Likewise.
	* sysdeps/ia64/fpu/w_atanhf.c: Likewise.
	* sysdeps/ia64/fpu/w_atanhl.c: Likewise.
	* sysdeps/ia64/fpu/w_cosh.c: Likewise.
	* sysdeps/ia64/fpu/w_coshf.c: Likewise.
	* sysdeps/ia64/fpu/w_coshl.c: Likewise.
	* sysdeps/ia64/fpu/w_exp.c: Likewise.
	* sysdeps/ia64/fpu/w_exp10.c: Likewise.
	* sysdeps/ia64/fpu/w_exp10f.c: Likewise.
	* sysdeps/ia64/fpu/w_exp10l.c: Likewise.
	* sysdeps/ia64/fpu/w_exp2.c: Likewise.
	* sysdeps/ia64/fpu/w_exp2f.c: Likewise.
	* sysdeps/ia64/fpu/w_exp2l.c: Likewise.
	* sysdeps/ia64/fpu/w_expf.c: Likewise.
	* sysdeps/ia64/fpu/w_expl.c: Likewise.
	* sysdeps/ia64/fpu/w_fmod.c: Likewise.
	* sysdeps/ia64/fpu/w_fmodf.c: Likewise.
	* sysdeps/ia64/fpu/w_fmodl.c: Likewise.
	* sysdeps/ia64/fpu/w_hypot.c: Likewise.
	* sysdeps/ia64/fpu/w_hypotf.c: Likewise.
	* sysdeps/ia64/fpu/w_hypotl.c: Likewise.
	* sysdeps/ia64/fpu/w_lgamma_r.c: Likewise.
	* sysdeps/ia64/fpu/w_lgammaf_r.c: Likewise.
	* sysdeps/ia64/fpu/w_lgammal_r.c: Likewise.
	* sysdeps/ia64/fpu/w_log.c: Likewise.
	* sysdeps/ia64/fpu/w_log10.c: Likewise.
	* sysdeps/ia64/fpu/w_log10f.c: Likewise.
	* sysdeps/ia64/fpu/w_log10l.c: Likewise.
	* sysdeps/ia64/fpu/w_log2.c: Likewise.
	* sysdeps/ia64/fpu/w_log2f.c: Likewise.
	* sysdeps/ia64/fpu/w_log2l.c: Likewise.
	* sysdeps/ia64/fpu/w_logf.c: Likewise.
	* sysdeps/ia64/fpu/w_logl.c: Likewise.
	* sysdeps/ia64/fpu/w_pow.c: Likewise.
	* sysdeps/ia64/fpu/w_powf.c: Likewise.
	* sysdeps/ia64/fpu/w_powl.c: Likewise.
	* sysdeps/ia64/fpu/w_remainder.c: Likewise.
	* sysdeps/ia64/fpu/w_remainderf.c: Likewise.
	* sysdeps/ia64/fpu/w_remainderl.c: Likewise.
	* sysdeps/ia64/fpu/w_sinh.c: Likewise.
	* sysdeps/ia64/fpu/w_sinhf.c: Likewise.
	* sysdeps/ia64/fpu/w_sinhl.c: Likewise.
	* sysdeps/ia64/fpu/w_sqrt.c: Likewise.
	* sysdeps/ia64/fpu/w_sqrtf.c: Likewise.
	* sysdeps/ia64/fpu/w_sqrtl.c: Likewise.
	* sysdeps/ia64/fpu/w_tgamma.c: Likewise.
	* sysdeps/ia64/fpu/w_tgammaf.c: Likewise.
	* sysdeps/ia64/fpu/w_tgammal.c: Likewise.
	* sysdeps/ieee754/dbl-64/w_exp_compat.c: Condition contents on
	[LIBM_SVID_COMPAT].
	* sysdeps/ieee754/flt-32/w_expf_compat.c: Likewise.
	* sysdeps/ieee754/k_standard.c: Likewise.
	* sysdeps/ieee754/k_standardf.c: Likewise.
	* sysdeps/ieee754/k_standardl.c: Likewise.
	* sysdeps/ieee754/ldbl-128/w_expl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/w_expl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-96/w_expl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-64-128/w_expl_compat.c: Condition
	long_double_symbol call on [LIBM_SVID_COMPAT].
	* sysdeps/ieee754/ldbl-opt/w_acoshl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_acosl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_asinl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_atan2l_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_atanhl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_coshl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_fmodl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_hypotl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_j0l_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_j1l_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_jnl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_lgammal_r_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_log10l_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_log2l_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_logl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_powl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_remainderl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_sinhl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_sqrtl_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_tgammal_compat.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/w_exp10l_compat.c: Condition
	long_double_symbol and compat_symbol calls on [LIBM_SVID_COMPAT].
 2017-09-05 23:35:55 +00:00
Joseph Myers
5a80d39d0d Obsolete pow10 functions. 
This patch obsoletes the pow10, pow10f and pow10l functions (makes
them into compat symbols, not available for new ports or static
linking).  The exp10 names for these functions are standardized (in TS
18661-4) and were added in the same glibc version (2.1) as pow10 so
source code can change to use them without any loss of portability.
Since pow10 is deliberately not provided for _Float128, only exp10,
this slightly simplifies moving to the new wrapper templates in the
!LIBM_SVID_COMPAT case, by avoiding needing to arrange for pow10,
pow10f and pow10l to be defined by those templates.

Tested for x86_64, and with build-many-glibcs.py.

	* manual/math.texi (pow10): Do not document.
	(pow10f): Likewise.
	(pow10l): Likewise.
	* math/bits/mathcalls.h [__USE_GNU] (pow10): Do not declare.
	* math/bits/math-finite.h [__USE_GNU] (pow10): Likewise.
	* math/libm-test-exp10.inc (pow10_test): Remove.
	(do_test): Do not call pow10.
	* math/w_exp10_compat.c (pow10): Make into compat symbol.
	[NO_LONG_DOUBLE] (pow10l): Likewise.
	* math/w_exp10f_compat.c (pow10f): Likewise.
	* math/w_exp10l_compat.c (pow10l): Likewise.
	* sysdeps/ia64/fpu/e_exp10.S: Include <shlib-compat.h>.
	(pow10): Make into compat symbol.
	* sysdeps/ia64/fpu/e_exp10f.S: Include <shlib-compat.h>.
	(pow10f): Make into compat symbol.
	* sysdeps/ia64/fpu/e_exp10l.S: Include <shlib-compat.h>.
	(pow10l): Make into compat symbol.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Remove
	pow10.
	(CFLAGS-nldbl-pow10.c): Remove variable..
	* sysdeps/ieee754/ldbl-opt/nldbl-pow10.c: Remove file.
	* sysdeps/ieee754/ldbl-opt/w_exp10_compat.c (pow10l): Condition on
	[SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_27)].
	* sysdeps/ieee754/ldbl-opt/w_exp10l_compat.c (compat_symbol):
	Undefine and redefine.
	(pow10l): Make into compat symbol.
	* sysdeps/aarch64/libm-test-ulps: Remove pow10 ulps.
	* sysdeps/alpha/fpu/libm-test-ulps: Likewise.
	* sysdeps/arm/libm-test-ulps: Likewise.
	* sysdeps/hppa/fpu/libm-test-ulps: Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
	* sysdeps/microblaze/libm-test-ulps: Likewise.
	* sysdeps/mips/mips32/libm-test-ulps: Likewise.
	* sysdeps/mips/mips64/libm-test-ulps: Likewise.
	* sysdeps/nios2/libm-test-ulps: Likewise.
	* sysdeps/powerpc/fpu/libm-test-ulps: Likewise.
	* sysdeps/powerpc/nofpu/libm-test-ulps: Likewise.
	* sysdeps/s390/fpu/libm-test-ulps: Likewise.
	* sysdeps/sh/libm-test-ulps: Likewise.
	* sysdeps/sparc/fpu/libm-test-ulps: Likewise.
	* sysdeps/tile/libm-test-ulps: Likewise.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2017-09-01 21:13:18 +00:00
Florian Weimer
17e00cc69e elf: Remove internal_function attribute 2017-08-31 16:59:37 +02:00
Joseph Myers
4fa9b3bfe6 Fix mcontext_t sigcontext namespace (bug 21457). 
This patch completes the ucontext.h namespace fixes by fixing issues
related to the use of struct sigcontext as mcontext_t, and inclusion
of <bits/sigcontext.h> even when struct sigcontext is not so used.

Inclusion of <bits/sigcontext.h> by <sys/ucontext.h> is removed; the
way to get the sigcontext structure is by including <signal.h> (in a
context where __USE_MISC is defined); the sysdeps/generic version of
sys/ucontext.h keeps the inclusion by necessity, with a comment about
how this is not namespace-clean, but the only configuration that used
it, MicroBlaze, gets its own version of the header in this patch.
Where mcontext_t was typedefed to struct sigcontext, the contents of
struct sigcontext are inserted (with appropriate namespace handling to
prefix fields with __ when __USE_MISC is not defined); review should
check that this has been done correctly in each case, whether the
definition of struct sigcontext comes from glibc headers or from the
Linux kernel.  This changes C++ name mangling on affected
architectures (which do not include x86_64/x86).

Tested for x86_64, and with build-many-glibcs.py.

2017-08-14  Joseph Myers  <joseph@codesourcery.com>

	[BZ #21457]
	* sysdeps/arm/sys/ucontext.h: Do not include <bits/sigcontext.h>.
	* sysdeps/generic/sys/ucontext.h: Add comment about use of struct
	sigcontext and namespace requirements.
	* sysdeps/i386/sys/ucontext.h: Do not include <bits/sigcontext.h>.
	* sysdeps/m68k/sys/ucontext.h: Likewise.
	* sysdeps/mips/sys/ucontext.h: Likewise.  Include <bits/types.h>.
	* sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h: Do not include
	<bits/sigcontext.h>.
	(__ctx): Define earlier.
	(mcontext_t): Define structure contents rather than using struct
	sigcontext.
	* sysdeps/unix/sysv/linux/aarch64/ucontext_i.sym (oEXTENSION): Use
	__glibc_reserved1 instead of __reserved.
	* sysdeps/unix/sysv/linux/alpha/sys/ucontext.h: Do not include
	<bits/sigcontext.h>.
	(__ctx): Define earlier.
	(mcontext_t): Define structure contents rather than using struct
	sigcontext.
	* sysdeps/unix/sysv/linux/alpha/ucontext-offsets.sym: Use
	mcontext_t instead of struct sigcontext.
	* sysdeps/unix/sysv/linux/arm/sys/ucontext.h: Do not include
	<bits/sigcontext.h>.
	(__ctx): Define earlier.
	(mcontext_t): Define structure contents rather than using struct
	sigcontext.
	* sysdeps/unix/sysv/linux/hppa/sys/ucontext.h: Do not include
	<bits/sigcontext.h>.
	(__ctx): Define earlier.
	(mcontext_t): Define structure contents rather than using struct
	sigcontext.
	* sysdeps/unix/sysv/linux/ia64/makecontext.c (__makecontext): Use
	mcontext_t instead of struct sigcontext.
	* sysdeps/unix/sysv/linux/ia64/sigcontext-offsets.sym: Use
	mcontext_t instead of struct sigcontext.
	* sysdeps/unix/sysv/linux/ia64/sys/ucontext.h: Do not include
	<bits/sigcontext.h>.
	(__ctx): New macro.
	(struct __ia64_fpreg_mcontext): New type.
	(mcontext_t): Define structure contents rather than using struct
	sigcontext.
	(_SC_GR0_OFFSET): Use mcontext_t instead of struct sigcontext.
	(uc_sigmask): Define using __ctx.
	(uc_stack): Likewise.
	* sysdeps/unix/sysv/linux/ia64/sys/procfs.h: Include
	<bits/sigcontext.h>.
	* sysdeps/unix/sysv/linux/ia64/sys/ptrace.h: Likewise.
	* sysdeps/unix/sysv/linux/m68k/sys/ucontext.h: Do not include
	<bits/sigcontext.h>.
	* sysdeps/unix/sysv/linux/microblaze/sys/ucontext.h: New file.
	* sysdeps/unix/sysv/linux/mips/sys/ucontext.h: Do not include
	<bits/sigcontext.h>.
	* sysdeps/unix/sysv/linux/nios2/sys/ucontext.h: Do not include
	<bits/sigcontext.h>.
	* sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h: Do not include
	<bits/sigcontext.h>.
	* sysdeps/unix/sysv/linux/s390/sys/ucontext.h: Do not include
	<bits/sigcontext.h>.
	* sysdeps/unix/sysv/linux/sh/sys/ucontext.h: Do not include
	<bits/sigcontext.h>.
	* sysdeps/unix/sysv/linux/sparc/sys/ucontext.h: Do not include
	<bits/sigcontext.h>.
	* sysdeps/unix/sysv/linux/tile/sys/ucontext.h: Do not include
	<bits/sigcontext.h>.
	(__ctx): Define earlier.
	(mcontext_t): Define structure contents rather than using struct
	sigcontext.
	* sysdeps/unix/sysv/linux/x86/sys/ucontext.h: Do not include
	<bits/sigcontext.h>.  Include <bits/types.h>.
	* conform/Makefile (test-xfail-XPG42/signal.h/conform): Remove.
	(test-xfail-XPG42/sys/wait.h/conform): Likewise.
	(test-xfail-XPG42/ucontext.h/conform): Likewise.
	(test-xfail-UNIX98/signal.h/conform): Likewise.
	(test-xfail-UNIX98/sys/wait.h/conform): Likewise.
	(test-xfail-UNIX98/ucontext.h/conform): Likewise.
	(test-xfail-XOPEN2K/signal.h/conform): Likewise.
	(test-xfail-XOPEN2K/sys/wait.h/conform): Likewise.
	(test-xfail-XOPEN2K/ucontext.h/conform): Likewise.
	(test-xfail-POSIX2008/signal.h/conform): Likewise.
	(test-xfail-POSIX2008/sys/wait.h/conform): Likewise.
	(test-xfail-XOPEN2K8/signal.h/conform): Likewise.
	(test-xfail-XOPEN2K8/sys/wait.h/conform): Likewise.
 2017-08-30 22:02:04 +00:00
Florian Weimer
4ebf934e34 i386: Replace internal_function attribute for __mcount_internal 
__mcount_internal is called from assembler code.  Use an explicit
regparm attribute to pass both arguments in registers, to match what
used to happen with internal_function before commit
fbdc1e3e8d (i386: Do not set
internal_function).
 2017-08-15 14:51:55 +02:00
Florian Weimer
fbdc1e3e8d i386: Do not set internal_function 
All calls to functions with the internal_function attribute
have been removed from assembler implementations, which means that
the definition of internal_function can be changed at the C level
without causing ABI issues with assembler code.

_dl_fixup still uses a regparm calling convention on i386, but this
is controlled through ARCH_FIXUP_ATTRIBUTE, not internal_function.
 2017-08-14 15:08:48 +02:00
Florian Weimer
b3f85fd2e4 _dl_init: Remove internal_function attribute 
The function is called from the i386 startup code, which needs minor
adjustments due to the changed ABI.
 2017-08-14 15:08:48 +02:00
Florian Weimer
630bf4916f _dl_start: Remove internal_function attribute 
The i386 startup code needs adjusting because it calls the function
and the ABI has changed.
 2017-08-14 15:08:48 +02:00
Joseph Myers
3d452dabd1 Fix uc_* namespace (bug 21457). 
The standard members of ucontext_t, in all standard versions with that
type, are uc_link, uc_sigmask, uc_stack and uc_mcontext.

The uc_* namespace is mostly reserved for additions to the structure.
However, in XPG4.2, it's only reserved when <ucontext.h> is included,
not when <signal.h> is included, while <signal.h> is required to
define ucontext_t (but not allowed to make visible other symbols from
<ucontext.h>).  Thus, nonstandard members should avoid uc_* names.
Some already do use __uc_*, but others don't; most architectures (all
except ia64, I think) have a member uc_flags and some have additional
members beyond that.

This patch makes nonstandard members have an __ prefix unless
__USE_MISC is defined.  Members whose names indicate they are solely
padding / reserved for future use are renamed unconditionally to use
the __glibc_reserved1 naming convention.

This is part of the preparation for a revised version of the
mcontext_t / sigcontext patch to be able to eliminate all 13 of the
miscellaneous XFAILs in conform/Makefile, rather than only 11 of them
as at present (at least one further fix on top of this one will be
needed for that as well).

Tested for x86_64, and with build-many-glibcs.py.

	[BZ #21457]
	* sysdeps/arm/sys/ucontext.h (__ctx): Move undefine further down.
	(ucontext_t): Use __ctx with uc_flags.  Rename uc_filler to
	__glibc_reserved1.
	* sysdeps/generic/sys/ucontext.h (__ctx): New macro.
	(ucontext_t): Use __ctx with uc_flags.
	* sysdeps/i386/sys/ucontext.h (__ctx): Move undefine further down.
	(__ctxt): Likewise.
	(ucontext_t): Use __ctx with uc_flags.  Rename uc_filler to
	__glibc_reserved1.
	* sysdeps/m68k/sys/ucontext.h (__ctx): Move undefine further down.
	(ucontext_t): Use __ctx with uc_flags.  Rename uc_filler to
	__glibc_reserved1.
	* sysdeps/mips/sys/ucontext.h (__ctx): Move undefine further down.
	(ucontext_t): Use __ctx with uc_flags.  Rename uc_filler to
	__glibc_reserved1.
	* sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h (__ctx): New
	macro.
	(ucontext_t): Use __ctx with uc_flags.
	* sysdeps/unix/sysv/linux/alpha/sys/ucontext.h (__ctx): New macro.
	(ucontext_t): Use __ctx with uc_flags.
	* sysdeps/unix/sysv/linux/arm/sys/ucontext.h (__ctx): New macro.
	(ucontext_t): Use __ctx with uc_flags and uc_regspace.
	* sysdeps/unix/sysv/linux/hppa/sys/ucontext.h (__ctx): New macro.
	(ucontext_t): Use __ctx with uc_flags.
	* sysdeps/unix/sysv/linux/m68k/sys/ucontext.h (__ctx): Move
	undefine further down.
	(ucontext_t): Use __ctx with uc_flags.  Rename uc_filler to
	__glibc_reserved1.
	* sysdeps/unix/sysv/linux/mips/sys/ucontext.h (__ctx): Move
	undefine further down.
	(ucontext_t): Use __ctx with uc_flags.
	* sysdeps/unix/sysv/linux/nios2/sys/ucontext.h (__ctx): Move
	undefine further down.
	(ucontext_t): Use __ctx with uc_flags.
	* sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h (ucontext_t): Use
	__ctx with uc_flags, uc_regs_ptr, uc_regs and uc_reg_space.
	Rename uc_pad to __glibc_reserved1.
	* sysdeps/unix/sysv/linux/s390/sys/ucontext.h (__ctx): Move
	undefine further down.
	(ucontext_t): Use __ctx with uc_flags.
	* sysdeps/unix/sysv/linux/sh/sys/ucontext.h (__ctx): Move undefine
	further down.
	(ucontext_t): Use __ctx with uc_flags.
	* sysdeps/unix/sysv/linux/sparc/sys/ucontext.h (ucontext_t): Use
	__ctx with uc_flags.
	* sysdeps/unix/sysv/linux/tile/sys/ucontext.h (__ctx): New macro.
	(ucontext_t): Use __ctx with uc_flags.
	* sysdeps/unix/sysv/linux/x86/sys/ucontext.h (ucontext_t): Use
	__ctx with uc_flags.
 2017-08-09 17:51:26 +00:00
H.J. Lu
973da22a35 i686: Implement IFUNC selectors in C 
* sysdeps/i386/i686/multiarch/Makefile (sysdep_routines): Add
	bcopy-ia32, bzero-ia32, rawmemchr-ia32 memchr-ia32,
	memcmp-ia32, memcpy-ia32, memmove-ia32, mempcpy-ia32,
	memset-ia32, strcat-ia32, strchr-ia32, strrchr-ia32,
	strcpy-ia32, strcmp-ia32, strcspn-ia32, strpbrk-ia32,
	strspn-ia32, strlen-ia32, stpcpy-ia32, stpncpy-ia32,
	memcpy_chk-nonshared, mempcpy_chk-nonshared,
	memmove_chk-nonshared and memset_chk-nonshared
	* sysdeps/i386/i686/multiarch/bcopy-ia32.S: New file.
	* sysdeps/i386/i686/multiarch/bcopy.c: Likewise.
	* sysdeps/i386/i686/multiarch/bzero-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/bzero.c: Likewise.
	* sysdeps/i386/i686/multiarch/ifunc-memmove.h: Likewise.
	* sysdeps/i386/i686/multiarch/ifunc-memset.h: Likewise.
	* sysdeps/i386/i686/multiarch/ifunc-sse2-bsf.h: Likewise.
	* sysdeps/i386/i686/multiarch/ifunc-sse2-ssse3.h: Likewise.
	* sysdeps/i386/i686/multiarch/ifunc-sse2.h: Likewise.
	* sysdeps/i386/i686/multiarch/ifunc-sse4_2.h: Likewise.
	* sysdeps/i386/i686/multiarch/ifunc-ssse3-sse4_2.h: Likewise.
	* sysdeps/i386/i686/multiarch/memchr-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/memchr.c: Likewise.
	* sysdeps/i386/i686/multiarch/memcmp-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcmp.c: Likewise.
	* sysdeps/i386/i686/multiarch/memcpy-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcpy.c: Likewise.
	* sysdeps/i386/i686/multiarch/memcpy_chk-nonshared.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcpy_chk.c: Likewise.
	* sysdeps/i386/i686/multiarch/memmove-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/memmove.c: Likewise.
	* sysdeps/i386/i686/multiarch/memmove_chk-nonshared.S: Likewise.
	* sysdeps/i386/i686/multiarch/memmove_chk.c: Likewise.
	* sysdeps/i386/i686/multiarch/mempcpy-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/mempcpy.c: Likewise.
	* sysdeps/i386/i686/multiarch/mempcpy_chk-nonshared.S: Likewise.
	* sysdeps/i386/i686/multiarch/mempcpy_chk.c: Likewise.
	* sysdeps/i386/i686/multiarch/memrchr.c: Likewise.
	* sysdeps/i386/i686/multiarch/memset-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/memset.c: Likewise.
	* sysdeps/i386/i686/multiarch/memset_chk-nonshared.S: Likewise.
	* sysdeps/i386/i686/multiarch/rawmemchr-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/rawmemchr.c: Likewise.
	* sysdeps/i386/i686/multiarch/stpcpy-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/stpcpy-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/stpcpy.c: Likewise.
	* sysdeps/i386/i686/multiarch/stpncpy-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/stpncpy.c: Likewise.
	* sysdeps/i386/i686/multiarch/strcasecmp.c: Likewise.
	* sysdeps/i386/i686/multiarch/strcasecmp_l.c: Likewise.
	* sysdeps/i386/i686/multiarch/strcat-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcat.c: Likewise.
	* sysdeps/i386/i686/multiarch/strchr-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strchr.c: Likewise.
	* sysdeps/i386/i686/multiarch/strcmp-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcmp.c: Likewise.
	* sysdeps/i386/i686/multiarch/strcpy-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcpy.c: Likewise.
	* sysdeps/i386/i686/multiarch/strcspn-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcspn.c: Likewise.
	* sysdeps/i386/i686/multiarch/strlen-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strlen.c: Likewise.
	* sysdeps/i386/i686/multiarch/strncase.c: Likewise.
	* sysdeps/i386/i686/multiarch/strncase_l.c: Likewise.
	* sysdeps/i386/i686/multiarch/strncat.c: Likewise.
	* sysdeps/i386/i686/multiarch/strncmp.c: Likewise.
	* sysdeps/i386/i686/multiarch/strncpy.c: Likewise.
	* sysdeps/i386/i686/multiarch/strnlen.c: Likewise.
	* sysdeps/i386/i686/multiarch/strpbrk-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strpbrk.c: Likewise.
	* sysdeps/i386/i686/multiarch/strrchr-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strrchr.c: Likewise.
	* sysdeps/i386/i686/multiarch/strspn-ia32.S: Likewise.
	* sysdeps/i386/i686/multiarch/strspn.c: Likewise.
	* sysdeps/i386/i686/multiarch/wcschr.c: Likewise.
	* sysdeps/i386/i686/multiarch/wcscmp.c: Likewise.
	* sysdeps/i386/i686/multiarch/wcscpy.c: Likewise.
	* sysdeps/i386/i686/multiarch/wcslen.c: Likewise.
	* sysdeps/i386/i686/multiarch/wcsrchr.c: Likewise.
	* sysdeps/i386/i686/multiarch/wmemcmp.c: Likewise.
	* sysdeps/i386/i686/multiarch/bcopy.S: Removed.
	* sysdeps/i386/i686/multiarch/bzero.S: Likewise.
	* sysdeps/i386/i686/multiarch/memchr.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcmp.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcpy_chk.S: Likewise.
	* sysdeps/i386/i686/multiarch/memmove.S: Likewise.
	* sysdeps/i386/i686/multiarch/memmove_chk.S: Likewise.
	* sysdeps/i386/i686/multiarch/mempcpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/mempcpy_chk.S: Likewise.
	* sysdeps/i386/i686/multiarch/memrchr.S: Likewise.
	* sysdeps/i386/i686/multiarch/memset.S: Likewise.
	* sysdeps/i386/i686/multiarch/memset_chk.S: Likewise.
	* sysdeps/i386/i686/multiarch/rawmemchr.S: Likewise.
	* sysdeps/i386/i686/multiarch/stpcpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/stpncpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcasecmp.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcasecmp_l.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcat.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcmp.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcspn.S: Likewise.
	* sysdeps/i386/i686/multiarch/strlen.S: Likewise.
	* sysdeps/i386/i686/multiarch/strncase.S: Likewise.
	* sysdeps/i386/i686/multiarch/strncase_l.S: Likewise.
	* sysdeps/i386/i686/multiarch/strncat.S: Likewise.
	* sysdeps/i386/i686/multiarch/strncmp.S: Likewise.
	* sysdeps/i386/i686/multiarch/strncpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/strnlen.S: Likewise.
	* sysdeps/i386/i686/multiarch/strpbrk.S: Likewise.
	* sysdeps/i386/i686/multiarch/strrchr.S: Likewise.
	* sysdeps/i386/i686/multiarch/strspn.S: Likewise.
	* sysdeps/i386/i686/multiarch/wcschr.S: Likewise.
	* sysdeps/i386/i686/multiarch/wcscmp.S: Likewise.
	* sysdeps/i386/i686/multiarch/wcscpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/wcslen.S: Likewise.
	* sysdeps/i386/i686/multiarch/wcsrchr.S: Likewise.
	* sysdeps/i386/i686/multiarch/wmemcmp.S: Likewise.
 2017-08-04 13:29:38 -07:00
H.J. Lu
1e8e527dd9 i386: Support static PIE in start.S 
Since start.o may be compiled as PIC, we should check PIC instead of
SHARED.  Also avoid dynamic relocation against main in static PIE since
_start is the entry point before the executable is relocated.

	* sysdeps/i386/start.S (_start): Check Check PIC instead of
	SHARED.  Avoid dynamic relocation against main in static PIE.
 2017-08-04 12:59:51 -07:00
H.J. Lu
c8a0e6ec03 x86: Remove __memset_zero_constant_len_parameter [BZ #21790] 
__memset_zero_constant_len_parameter should be removed by

commit 61062f5630
Author: Ulrich Drepper <drepper@redhat.com>
Date:   Tue Mar 1 00:35:23 2005 +0000

    2005-02-24  Roland McGrath  <roland@redhat.com>

            * debug/Versions (libc: GLIBC_2.4): Remove
            __memset_zero_constant_len_parameter.
            * sysdeps/generic/memset_chk.c: Remove alias and warning.
            * misc/sys/cdefs.h (__warndecl): New macro.
            * debug/warning-nop.c: New file.
            * string/bits/string3.h (memset): Call __warn_memset_zero_len with no
            arguments, instead of calling __memset_zero_constant_len_parameter.
            Use __warndecl for __warn_memset_zero_len.
            * debug/Makefile (routines): Add $(static-only-routines).
            (static-only-routines): New variable.

This patch removes the last emaining pieces of it.  Tested it on i586,
i686 and x86-64.

	[BZ #21790]
	* sysdeps/i386/i586/memset.S
	(__memset_zero_constant_len_parameter): Removed.
	* sysdeps/i386/i686/memset.S
	(__memset_zero_constant_len_parameter): Likewise.
	* sysdeps/i386/i686/multiarch/memset_chk.S
	(__memset_zero_constant_len_parameter): Likewise.
	* sysdeps/x86_64/memset.S (__memset_zero_constant_len_parameter):
	Likewise.
 2017-08-04 10:56:51 -07:00
Aurelien Jarno
144bdab050 i686/multiarch: Regenerate ulps 
This comes from running “make regen-ulps” on an AMD Opteron 2378 CPU.

Changelog:
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Regenerated.
 2017-08-03 22:33:19 +00:00
Joseph Myers
24ab7723b8 Consistently use uintN_t not u_intN_t in libm. 
This patch changes libm code to make consistent use of C99 uintN_t
types instead of sometimes using those and sometimes using the older
nonstandard u_intN_t names.  This makes sense as a cleanup in its own
right, and also facilitates merges to GCC's libquadmath (which gets
the types from stdint.h and so may not have u_intN_t available at
all).

Tested for x86_64, and with build-many-glibcs.py.

	* math/s_nextafter.c (__nextafter): Use uintN_t instead of
	u_intN_t.
	* math/s_nexttowardf.c (__nexttowardf): Likewise.
	* sysdeps/generic/math_private.h (ieee_double_shape_type):
	Likewise.
	(ieee_float_shape_type): Likewise.
	* sysdeps/i386/fpu/s_fpclassifyl.c (__fpclassifyl): Likewise.
	* sysdeps/i386/fpu/s_isnanl.c (__isnanl): Likewise.
	* sysdeps/i386/fpu/s_nextafterl.c (__nextafterl): Likewise.
	* sysdeps/i386/fpu/s_nexttoward.c (__nexttoward): Likewise.
	* sysdeps/i386/fpu/s_nexttowardf.c (__nexttowardf): Likewise.
	* sysdeps/ieee754/dbl-64/e_acosh.c (__ieee754_acosh): Likewise.
	* sysdeps/ieee754/dbl-64/e_cosh.c (__ieee754_cosh): Likewise.
	* sysdeps/ieee754/dbl-64/e_fmod.c (__ieee754_fmod): Likewise.
	* sysdeps/ieee754/dbl-64/e_gamma_r.c (__ieee754_gamma_r):
	Likewise.
	* sysdeps/ieee754/dbl-64/e_hypot.c (__ieee754_hypot): Likewise.
	* sysdeps/ieee754/dbl-64/e_jn.c (__ieee754_jn): Likewise.
	(__ieee754_yn): Likewise.
	* sysdeps/ieee754/dbl-64/e_log10.c (__ieee754_log10): Likewise.
	* sysdeps/ieee754/dbl-64/e_log2.c (__ieee754_log2): Likewise.
	* sysdeps/ieee754/dbl-64/e_rem_pio2.c (__ieee754_rem_pio2):
	Likewise.
	* sysdeps/ieee754/dbl-64/e_sinh.c (__ieee754_sinh): Likewise.
	* sysdeps/ieee754/dbl-64/s_ceil.c (__ceil): Likewise.
	* sysdeps/ieee754/dbl-64/s_copysign.c (__copysign): Likewise.
	* sysdeps/ieee754/dbl-64/s_erf.c (__erf): Likewise.
	(__erfc): Likewise.
	* sysdeps/ieee754/dbl-64/s_expm1.c (__expm1): Likewise.
	* sysdeps/ieee754/dbl-64/s_finite.c (FINITE): Likewise.
	* sysdeps/ieee754/dbl-64/s_floor.c (__floor): Likewise.
	* sysdeps/ieee754/dbl-64/s_fpclassify.c (__fpclassify): Likewise.
	* sysdeps/ieee754/dbl-64/s_isnan.c (__isnan): Likewise.
	* sysdeps/ieee754/dbl-64/s_issignaling.c (__issignaling):
	Likewise.
	* sysdeps/ieee754/dbl-64/s_llrint.c (__llrint): Likewise.
	* sysdeps/ieee754/dbl-64/s_llround.c (__llround): Likewise.
	* sysdeps/ieee754/dbl-64/s_lrint.c (__lrint): Likewise.
	* sysdeps/ieee754/dbl-64/s_lround.c (__lround): Likewise.
	* sysdeps/ieee754/dbl-64/s_modf.c (__modf): Likewise.
	* sysdeps/ieee754/dbl-64/s_nextup.c (__nextup): Likewise.
	* sysdeps/ieee754/dbl-64/s_remquo.c (__remquo): Likewise.
	* sysdeps/ieee754/dbl-64/s_round.c (__round): Likewise.
	* sysdeps/ieee754/dbl-64/s_trunc.c (__trunc): Likewise.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_issignaling.c
	(__issignaling): Likewise.
	* sysdeps/ieee754/flt-32/e_atan2f.c (__ieee754_atan2f): Likewise.
	* sysdeps/ieee754/flt-32/e_fmodf.c (__ieee754_fmodf): Likewise.
	* sysdeps/ieee754/flt-32/e_gammaf_r.c (__ieee754_gammaf_r):
	Likewise.
	* sysdeps/ieee754/flt-32/e_jnf.c (__ieee754_ynf): Likewise.
	* sysdeps/ieee754/flt-32/e_log10f.c (__ieee754_log10f): Likewise.
	* sysdeps/ieee754/flt-32/e_powf.c (__ieee754_powf): Likewise.
	* sysdeps/ieee754/flt-32/e_rem_pio2f.c (__ieee754_rem_pio2f):
	Likewise.
	* sysdeps/ieee754/flt-32/e_remainderf.c (__ieee754_remainderf):
	Likewise.
	* sysdeps/ieee754/flt-32/e_sqrtf.c (__ieee754_sqrtf): Likewise.
	* sysdeps/ieee754/flt-32/s_ceilf.c (__ceilf): Likewise.
	* sysdeps/ieee754/flt-32/s_copysignf.c (__copysignf): Likewise.
	* sysdeps/ieee754/flt-32/s_erff.c (__erff): Likewise.
	(__erfcf): Likewise.
	* sysdeps/ieee754/flt-32/s_expm1f.c (__expm1f): Likewise.
	* sysdeps/ieee754/flt-32/s_finitef.c (FINITEF): Likewise.
	* sysdeps/ieee754/flt-32/s_floorf.c (__floorf): Likewise.
	* sysdeps/ieee754/flt-32/s_fpclassifyf.c (__fpclassifyf):
	Likewise.
	* sysdeps/ieee754/flt-32/s_isnanf.c (__isnanf): Likewise.
	* sysdeps/ieee754/flt-32/s_issignalingf.c (__issignalingf):
	Likewise.
	* sysdeps/ieee754/flt-32/s_llrintf.c (__llrintf): Likewise.
	* sysdeps/ieee754/flt-32/s_llroundf.c (__llroundf): Likewise.
	* sysdeps/ieee754/flt-32/s_lrintf.c (__lrintf): Likewise.
	* sysdeps/ieee754/flt-32/s_lroundf.c (__lroundf): Likewise.
	* sysdeps/ieee754/flt-32/s_modff.c (__modff): Likewise.
	* sysdeps/ieee754/flt-32/s_remquof.c (__remquof): Likewise.
	* sysdeps/ieee754/flt-32/s_roundf.c (__roundf): Likewise.
	* sysdeps/ieee754/ldbl-128/e_acoshl.c (__ieee754_acoshl):
	Likewise.
	* sysdeps/ieee754/ldbl-128/e_atan2l.c (__ieee754_atan2l):
	Likewise.
	* sysdeps/ieee754/ldbl-128/e_atanhl.c (__ieee754_atanhl):
	Likewise.
	* sysdeps/ieee754/ldbl-128/e_fmodl.c (__ieee754_fmodl): Likewise.
	* sysdeps/ieee754/ldbl-128/e_gammal_r.c (__ieee754_gammal_r):
	Likewise.
	* sysdeps/ieee754/ldbl-128/e_hypotl.c (__ieee754_hypotl):
	Likewise.
	* sysdeps/ieee754/ldbl-128/e_jnl.c (__ieee754_jnl): Likewise.
	(__ieee754_ynl): Likewise.
	* sysdeps/ieee754/ldbl-128/e_powl.c (__ieee754_powl): Likewise.
	* sysdeps/ieee754/ldbl-128/e_rem_pio2l.c (__ieee754_rem_pio2l):
	Likewise.
	* sysdeps/ieee754/ldbl-128/e_remainderl.c (__ieee754_remainderl):
	Likewise.
	* sysdeps/ieee754/ldbl-128/e_sinhl.c (__ieee754_sinhl): Likewise.
	* sysdeps/ieee754/ldbl-128/k_cosl.c (__kernel_cosl): Likewise.
	* sysdeps/ieee754/ldbl-128/k_sincosl.c (__kernel_sincosl):
	Likewise.
	* sysdeps/ieee754/ldbl-128/k_sinl.c (__kernel_sinl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_ceill.c (__ceill): Likewise.
	* sysdeps/ieee754/ldbl-128/s_copysignl.c (__copysignl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_erfl.c (__erfcl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_fabsl.c (__fabsl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_finitel.c (__finitel): Likewise.
	* sysdeps/ieee754/ldbl-128/s_floorl.c (__floorl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_fpclassifyl.c (__fpclassifyl):
	Likewise.
	* sysdeps/ieee754/ldbl-128/s_frexpl.c (__frexpl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_isnanl.c (__isnanl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_issignalingl.c (__issignalingl):
	Likewise.
	* sysdeps/ieee754/ldbl-128/s_llrintl.c (__llrintl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_llroundl.c (__llroundl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_lrintl.c (__lrintl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_lroundl.c (__lroundl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_modfl.c (__modfl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_nearbyintl.c (__nearbyintl):
	Likewise.
	* sysdeps/ieee754/ldbl-128/s_nextafterl.c (__nextafterl):
	Likewise.
	* sysdeps/ieee754/ldbl-128/s_nexttoward.c (__nexttoward):
	Likewise.
	* sysdeps/ieee754/ldbl-128/s_nexttowardf.c (__nexttowardf):
	Likewise.
	* sysdeps/ieee754/ldbl-128/s_nextupl.c (__nextupl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_remquol.c (__remquol): Likewise.
	* sysdeps/ieee754/ldbl-128/s_rintl.c (__rintl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_roundl.c (__roundl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_tanhl.c (__tanhl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_truncl.c (__truncl): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_fmodl.c (__ieee754_fmodl):
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c (__ieee754_gammal_r):
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_powl.c (__ieee754_powl): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_rem_pio2l.c (__ieee754_rem_pio2l):
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_remainderl.c
	(__ieee754_remainderl): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/k_cosl.c (__kernel_cosl): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/k_sinl.c (__kernel_sinl): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_fabsl.c (__fabsl): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_fpclassifyl.c (___fpclassifyl):
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_modfl.c (__modfl): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_nexttowardf.c (__nexttowardf):
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_remquol.c (__remquol): Likewise.
	* sysdeps/ieee754/ldbl-96/e_acoshl.c (__ieee754_acoshl): Likewise.
	* sysdeps/ieee754/ldbl-96/e_asinl.c (__ieee754_asinl): Likewise.
	* sysdeps/ieee754/ldbl-96/e_atanhl.c (__ieee754_atanhl): Likewise.
	* sysdeps/ieee754/ldbl-96/e_coshl.c (__ieee754_coshl): Likewise.
	* sysdeps/ieee754/ldbl-96/e_gammal_r.c (__ieee754_gammal_r):
	Likewise.
	* sysdeps/ieee754/ldbl-96/e_hypotl.c (__ieee754_hypotl): Likewise.
	* sysdeps/ieee754/ldbl-96/e_j0l.c (__ieee754_j0l): Likewise.
	(__ieee754_y0l): Likewise.
	(pzero): Likewise.
	(qzero): Likewise.
	* sysdeps/ieee754/ldbl-96/e_j1l.c (__ieee754_j1l): Likewise.
	(__ieee754_y1l): Likewise.
	(pone): Likewise.
	(qone): Likewise.
	* sysdeps/ieee754/ldbl-96/e_jnl.c (__ieee754_jnl): Likewise.
	(__ieee754_ynl): Likewise.
	* sysdeps/ieee754/ldbl-96/e_lgammal_r.c (sin_pi): Likewise.
	(__ieee754_lgammal_r): Likewise.
	* sysdeps/ieee754/ldbl-96/e_rem_pio2l.c (__ieee754_rem_pio2l):
	Likewise.
	* sysdeps/ieee754/ldbl-96/e_sinhl.c (__ieee754_sinhl): Likewise.
	* sysdeps/ieee754/ldbl-96/s_copysignl.c (__copysignl): Likewise.
	* sysdeps/ieee754/ldbl-96/s_erfl.c (__erfl): Likewise.
	(__erfcl): Likewise.
	* sysdeps/ieee754/ldbl-96/s_frexpl.c (__frexpl): Likewise.
	* sysdeps/ieee754/ldbl-96/s_issignalingl.c (__issignalingl):
	Likewise.
	* sysdeps/ieee754/ldbl-96/s_llrintl.c (__llrintl): Likewise.
	* sysdeps/ieee754/ldbl-96/s_llroundl.c (__llroundl): Likewise.
	* sysdeps/ieee754/ldbl-96/s_lrintl.c (__lrintl): Likewise.
	* sysdeps/ieee754/ldbl-96/s_lroundl.c (__lroundl): Likewise.
	* sysdeps/ieee754/ldbl-96/s_modfl.c (__modfl): Likewise.
	* sysdeps/ieee754/ldbl-96/s_nexttoward.c (__nexttoward): Likewise.
	* sysdeps/ieee754/ldbl-96/s_nexttowardf.c (__nexttowardf):
	Likewise.
	* sysdeps/ieee754/ldbl-96/s_nextupl.c (__nextupl): Likewise.
	* sysdeps/ieee754/ldbl-96/s_remquol.c (__remquol): Likewise.
	* sysdeps/ieee754/ldbl-96/s_roundl.c (__roundl): Likewise.
	* sysdeps/ieee754/ldbl-96/s_tanhl.c (__tanhl): Likewise.
	* sysdeps/ieee754/ldbl-opt/s_nexttowardfd.c (__nldbl_nexttowardf):
	Likewise.
	* sysdeps/m68k/m680x0/fpu/e_pow.c (s(__ieee754_pow)): Likewise.
	* sysdeps/m68k/m680x0/fpu/s_fpclassifyl.c (__fpclassifyl):
	Likewise.
	* sysdeps/m68k/m680x0/fpu/s_llrint.c (__llrint): Likewise.
	* sysdeps/m68k/m680x0/fpu/s_llrintf.c (__llrintf): Likewise.
	* sysdeps/m68k/m680x0/fpu/s_llrintl.c (__llrintl): Likewise.
	* sysdeps/m68k/m680x0/fpu/s_nextafterl.c (__nextafterl): Likewise.
	* sysdeps/x86/fpu/powl_helper.c (__powl_helper): Likewise.
 2017-08-03 19:55:04 +00:00
H.J. Lu
dfc93c41ee i386: Check PIC to enable PIC setups in multiarch functions 
Check PIC, instead of SHARED, to enable PIC setups.

	* sysdeps/i386/i686/multiarch/memcmp-sse4.S: Check PIC instead
	of SHARED.
	* sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcpy-ssse3-rep.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcpy-ssse3.S: Likewise.
	* sysdeps/i386/i686/multiarch/memset-sse2-rep.S: Likewise.
	* sysdeps/i386/i686/multiarch/memset-sse2.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcat-sse2.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcpy-sse2.S: Likewise.
 2017-08-02 10:25:25 -07:00
H.J. Lu
b358255f95 i386: Don't define multiarch __memmove_chk in libc.a [BZ #21791] 
There is no need to define multiarch __memmove_chk in libc.a since they
aren't used at all.

	[BZ #21791]
	* sysdeps/i386/i686/multiarch/memcpy-sse2-unaligned.S
	(MEMCPY_CHK): Define only if SHARED is defined.
	* sysdeps/i386/i686/multiarch/memcpy-ssse3-rep.S (MEMCPY_CHK):
	Likewise.
	* sysdeps/i386/i686/multiarch/memcpy-ssse3.S (MEMCPY_CHK):
	Likewise.
 2017-08-02 08:34:34 -07:00
H.J. Lu
47f2739659 i386: Test memmove_chk and memset_chk only in libc.so [BZ #21741] 
Since there are no multiarch versions of memmove_chk and memset_chk,
test multiarch versions of memmove_chk and memset_chk only in libc.so.

	[BZ #21741]
	* sysdeps/i386/i686/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Test memmove_chk and memset_chk only
	in libc.so.
 2017-07-19 08:39:18 -07:00
H.J. Lu
4e61a6be44 i386: Increase MALLOC_ALIGNMENT to 16 [BZ #21120] 
GCC 7 changed the definition of max_align_t on i386:

https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=9b5c49ef97e63cc63f1ffa13baf771368105ebe2

As a result, glibc malloc no longer returns memory blocks which are as
aligned as max_align_t requires.

This causes malloc/tst-malloc-thread-fail to fail with an error like this
one:

error: allocation function 0, size 144 not aligned to 16

This patch moves the MALLOC_ALIGNMENT definition to <malloc-alignment.h>
and increases the malloc alignment to 16 for i386.

	[BZ #21120]
	* malloc/malloc-internal.h (MALLOC_ALIGNMENT): Moved to ...
	* sysdeps/generic/malloc-alignment.h: Here.  New file.
	* sysdeps/i386/malloc-alignment.h: Likewise.
	* sysdeps/generic/malloc-machine.h: Include <malloc-alignment.h>.
 2017-06-30 09:11:24 -07:00
Joseph Myers
251287734e Rename struct ucontext tag (bug 21457). 
The ucontext_t type has a tag struct ucontext.  As with previous such
issues for siginfo_t and stack_t, this tag is not permitted by POSIX
(is not in a reserved namespace), and so namespace conformance means
breaking C++ name mangling for this type.

In this case, the type does need to have some tag rather than just a
typedef name, because it includes a pointer to itself.  This patch
uses struct ucontext_t as the new tag, so the type is mangled as
ucontext_t (the POSIX *_t reservation applies in all namespaces, not
just the namespace of ordinary identifiers).  Another reserved name
such as struct __ucontext could of course be used.

Because of other namespace issues, this patch does not by itself fix
bug 21457 or allow any XFAILs to be removed.

Tested for x86_64, and with build-many-glibcs.py.

	[BZ #21457]
	* sysdeps/arm/sys/ucontext.h (struct ucontext): Rename to struct
	ucontext_t.
	* sysdeps/generic/sys/ucontext.h (struct ucontext): Likewise.
	* sysdeps/i386/sys/ucontext.h (struct ucontext): Likewise.
	* sysdeps/m68k/sys/ucontext.h (struct ucontext): Likewise.
	* sysdeps/mips/sys/ucontext.h (struct ucontext): Likewise.
	* sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h (struct
	ucontext): Likewise.
	* sysdeps/unix/sysv/linux/alpha/sys/ucontext.h (struct ucontext):
	Likewise.
	* sysdeps/unix/sysv/linux/arm/sys/ucontext.h (struct ucontext):
	Likewise.
	* sysdeps/unix/sysv/linux/hppa/sys/ucontext.h (struct ucontext):
	Likewise.
	* sysdeps/unix/sysv/linux/ia64/sys/ucontext.h (struct ucontext):
	Likewise.
	* sysdeps/unix/sysv/linux/m68k/sys/ucontext.h (struct ucontext):
	Likewise.
	* sysdeps/unix/sysv/linux/mips/sys/ucontext.h (struct ucontext):
	Likewise.
	* sysdeps/unix/sysv/linux/nios2/sys/ucontext.h (struct ucontext):
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h (struct
	ucontext): Likewise.
	* sysdeps/unix/sysv/linux/s390/sys/ucontext.h (struct ucontext):
	Likewise.
	* sysdeps/unix/sysv/linux/sh/sys/ucontext.h (struct ucontext):
	Likewise.
	* sysdeps/unix/sysv/linux/sparc/sys/ucontext.h (struct ucontext):
	Likewise.
	* sysdeps/unix/sysv/linux/tile/sys/ucontext.h (struct ucontext):
	Likewise.
	* sysdeps/unix/sysv/linux/x86/sys/ucontext.h (struct ucontext):
	Likewise.
	* sysdeps/powerpc/powerpc32/backtrace.c (struct
	rt_signal_frame_32): Likewise.
	* sysdeps/powerpc/powerpc64/backtrace.c (struct signal_frame_64):
	Likewise.
	* sysdeps/unix/sysv/linux/aarch64/kernel_rt_sigframe.h (struct
	kernel_rt_sigframe): Likewise.
	* sysdeps/unix/sysv/linux/aarch64/sigcontextinfo.h (SIGCONTEXT):
	Likewise.
	* sysdeps/unix/sysv/linux/arm/register-dump.h (register_dump):
	Likewise.
	* sysdeps/unix/sysv/linux/arm/sigcontextinfo.h (SIGCONTEXT):
	Likewise.
	* sysdeps/unix/sysv/linux/hppa/profil-counter.h
	(__profil_counter): Likewise.
	* sysdeps/unix/sysv/linux/microblaze/sigcontextinfo.h
	(SIGCONTEXT): Likewise.
	* sysdeps/unix/sysv/linux/mips/kernel_rt_sigframe.h (struct
	kernel_rt_sigframe): Likewise.
	* sysdeps/unix/sysv/linux/nios2/kernel_rt_sigframe.h (struct
	kernel_rt_sigframe): Likewise.
	* sysdeps/unix/sysv/linux/nios2/sigcontextinfo.h (SIGCONTEXT):
	Likewise.
	* sysdeps/unix/sysv/linux/sh/makecontext.S (__makecontext):
	Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/makecontext.c
	(__start_context): Likewise.
	* sysdeps/unix/sysv/linux/tile/sigcontextinfo.h (SIGCONTEXT):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/register-dump.h (register_dump):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/sigcontextinfo.h (SIGCONTEXT):
	Likewise.
 2017-06-26 22:03:58 +00:00
Joseph Myers
c86ed71d63 Add float128 support for x86_64, x86. 
This patch enables float128 support for x86_64 and x86.  All GCC
versions that can build glibc provide the required support, but since
GCC 6 and before don't provide __builtin_nanq / __builtin_nansq, sNaN
tests and some tests of NaN payloads need to be disabled with such
compilers (this does not affect the generated glibc binaries at all,
just the tests).  bits/floatn.h declares float128 support to be
available for GCC versions that provide the required libgcc support
(4.3 for x86_64, 4.4 for i386 GNU/Linux, 4.5 for i386 GNU/Hurd);
compilation-only support was present some time before then, but not
really useful without the libgcc functions.

fenv_private.h needed updating to avoid trying to put _Float128 values
in registers.  I make no assertion of optimality of the
math_opt_barrier / math_force_eval definitions for this case; they are
simply intended to be sufficient to work correctly.

Tested for x86_64 and x86, with GCC 7 and GCC 6.  (Testing for x32 was
compilation tests only with build-many-glibcs.py to verify the ABI
baseline updates.  I have not done any testing for Hurd, although the
float128 support is enabled there as for GNU/Linux.)

	* sysdeps/i386/Implies: Add ieee754/float128.
	* sysdeps/x86_64/Implies: Likewise.
	* sysdeps/x86/bits/floatn.h: New file.
	* sysdeps/x86/float128-abi.h: Likewise.
	* manual/math.texi (Mathematics): Document support for _Float128
	on x86_64 and x86.
	* sysdeps/i386/fpu/fenv_private.h: Include <bits/floatn.h>.
	(math_opt_barrier): Do not put _Float128 values in floating-point
	registers.
	(math_force_eval): Likewise.
	[__x86_64__] (SET_RESTORE_ROUNDF128): New macro.
	* sysdeps/x86/fpu/Makefile [$(subdir) = math] (CPPFLAGS): Append
	to Makefile variable.
	* sysdeps/x86/fpu/e_sqrtf128.c: New file.
	* sysdeps/x86/fpu/sfp-machine.h: Likewise.  Based on libgcc.
	* sysdeps/x86/math-tests.h: New file.
	* math/libm-test-support.h (XFAIL_FLOAT128_PAYLOAD): New macro.
	* math/libm-test-getpayload.inc (getpayload_test_data): Use
	XFAIL_FLOAT128_PAYLOAD.
	* math/libm-test-setpayload.inc (setpayload_test_data): Likewise.
	* math/libm-test-totalorder.inc (totalorder_test_data): Likewise.
	* math/libm-test-totalordermag.inc (totalordermag_test_data):
	Likewise.
	* sysdeps/unix/sysv/linux/i386/libc.abilist: Update.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2017-06-26 22:02:24 +00:00
Joseph Myers
06a5b8f799 Update x86 ulps for GCC 7. 
Testing with GCC 7 for 32-bit x86 showed some ulps differences,
presumably from variation in when values with excess precision get
spilled to the stack and so lose that precision.  This patch updates
the libm-test-ulps files accordingly.

	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
 2017-06-23 20:23:26 +00:00
Zack Weinberg
09a596cc2c Remove bits/string.h. 
These machine-dependent inline string functions have never been on by
default, and even if they were a good idea at the time they were
introduced, they haven't really been touched in ten to fifteen years
and probably aren't a good idea on current-gen processors.  Current
thinking is that this class of optimization is best left to the
compiler.

	* bits/string.h, string/bits/string.h
	* sysdeps/aarch64/bits/string.h
	* sysdeps/m68k/m680x0/m68020/bits/string.h
	* sysdeps/s390/bits/string.h, sysdeps/sparc/bits/string.h
	* sysdeps/x86/bits/string.h: Delete file.

	* string/string.h: Don't include bits/string.h.
	* string/bits/string3.h: Rename to bits/string_fortified.h.
	No need to undef various symbols that the removed headers
	might have defined as macros.
	* string/Makefile (headers): Remove bits/string.h, change
	bits/string3.h to bits/string_fortified.h.
	* string/string-inlines.c: Update commentary.  Remove definitions
	of various macros that nothing looks at anymore.  Don't directly
	include bits/string.h. Set _STRING_INLINE_unaligned here, based on
	compiler-predefined macros.
	* string/strncat.c: If STRNCAT is not defined, or STRNCAT_PRIMARY
	_is_ defined, provide internal hidden alias __strncat.
	* include/string.h: Declare internal hidden alias __strncat.
	Only forward __stpcpy to __builtin_stpcpy if __NO_STRING_INLINES is
	not defined.
	* include/bits/string3.h: Rename to bits/string_fortified.h,
	update to match above.

	* sysdeps/i386/string-inlines.c: Define compat symbols for
	everything formerly defined by sysdeps/x86/bits/string.h.
	Make existing definitions into compat symbols as well.
	Remove some no-longer-necessary messing around with macros.

	* sysdeps/powerpc/powerpc32/power4/multiarch/mempcpy.c
	* sysdeps/powerpc/powerpc64/multiarch/mempcpy.c
	* sysdeps/powerpc/powerpc64/multiarch/stpcpy.c
	* sysdeps/s390/multiarch/mempcpy.c
	No need to define _HAVE_STRING_ARCH_mempcpy.
	Do define __NO_STRING_INLINES and NO_MEMPCPY_STPCPY_REDIRECT.

	* sysdeps/i386/i686/multiarch/strncat-c.c
	* sysdeps/s390/multiarch/strncat-c.c
	* sysdeps/x86_64/multiarch/strncat-c.c
	Define STRNCAT_PRIMARY.  Don't change definition of libc_hidden_def.
 2017-06-20 08:21:24 -04:00
Florian Weimer
69052a3a95 i686: Add missing IS_IN (libc) guards to vectorized strcspn 
Since commit d957c4d3fa (i386: Compile
rtld-*.os with -mno-sse -mno-mmx -mfpmath=387), vector intrinsics can
no longer be used in ld.so, even if the compiled code never makes it
into the final ld.so link.  This commit adds the missing IS_IN (libc)
guard to the SSE 4.2 strcspn implementation, so that it can be used from
ld.so in the future.
 2017-06-14 14:50:11 +02:00
Zack Weinberg
fd860eaaa8 Remove __need macros from errno.h (__need_Emath, __need_error_t). 
This is fairly complicated, not because the users of __need_Emath and
__need_error_t have complicated requirements, but because the core
changes had a lot of fallout.

__need_error_t exists for gnulib compatibility in argz.h and argp.h.
error_t itself is a Hurdism, an enum containing all the E-constants,
so you can do 'p (error_t) errno' in gdb and get a symbolic value.
argz.h and argp.h use it for function return values, and they want to
fall back to 'int' when that's not available.  There is no reason why
these nonstandard headers cannot just go ahead and include all of
errno.h; so we do that.

__need_Emath is defined only by .S files; what they _really_ need is
for errno.h to avoid declaring anything other than the E-constants
(e.g. 'extern int __errno_location(void);' is a syntax error in
assembly language). This is replaced with a check for __ASSEMBLER__ in
errno.h, plus a carefully documented requirement for bits/errno.h not
to define anything other than macros.  That in turn has the
consequence that bits/errno.h must not define errno - fortunately, all
live ports use the same definition of errno, so I've moved it to
errno.h.  The Hurd bits/errno.h must also take care not to define
error_t when __ASSEMBLER__ is defined, which involves repeating all of
the definitions twice, but it's a generated file so that's okay.

	* stdlib/errno.h: Remove __need_Emath and __need_error_t logic.
	Reorganize file.  Declare errno here.  When __ASSEMBLER__ is
	defined, don't declare anything other than the E-constants.

	* include/errno.h: Change conditional for exposing internal
	declarations to (not _ISOMAC and not __ASSEMBLER__).
	* bits/errno.h: Remove logic for __need_Emath.  Document
	requirements for a port-specific bits/errno.h.

	* sysdeps/unix/sysv/linux/bits/errno.h
	* sysdeps/unix/sysv/linux/alpha/bits/errno.h
	* sysdeps/unix/sysv/linux/hppa/bits/errno.h
	* sysdeps/unix/sysv/linux/mips/bits/errno.h
	* sysdeps/unix/sysv/linux/sparc/bits/errno.h:
	Add multiple-include guard and check against improper inclusion.
	Remove __need_Emath logic.  Don't declare errno here.  Ensure all
	constants are defined as simple integer literals.  Consistent
	formatting.
	* sysdeps/mach/hurd/errnos.awk: Likewise.  Only define error_t and
	enum __error_t_codes if __ASSEMBLER__ is not defined.
	* sysdeps/mach/hurd/bits/errno.h: Regenerate.

	* argp/argp.h, string/argz.h: Don't define __need_error_t before
	including errno.h.
	* sysdeps/i386/i686/fpu/multiarch/s_cosf-sse2.S
	* sysdeps/i386/i686/fpu/multiarch/s_sincosf-sse2.S
	* sysdeps/i386/i686/fpu/multiarch/s_sinf-sse2.S
	* sysdeps/x86_64/fpu/s_cosf.S
	* sysdeps/x86_64/fpu/s_sincosf.S
	* sysdeps/x86_64/fpu/s_sinf.S:
	Just include errno.h; don't define __need_Emath or include
	bits/errno.h directly.
 2017-06-14 08:14:34 -04:00
Alan Modra
0572433b5b PowerPC64 ELFv2 PPC64_OPT_LOCALENTRY 
ELFv2 functions with localentry:0 are those with a single entry point,
ie. global entry == local entry, that have no requirement on r2 or
r12 and guarantee r2 is unchanged on return.  Such an external
function can be called via the PLT without saving r2 or restoring it
on return, avoiding a common load-hit-store for small functions.

This patch implements the ld.so changes necessary for this
optimization.  ld.so needs to check that an optimized plt call
sequence is in fact calling a function implemented with localentry:0,
end emit a fatal error otherwise.

The elf/testobj6.c change is to stop "error while loading shared
libraries: expected localentry:0 `preload'" when running
elf/preloadtest, which we'd get otherwise.

	* elf/elf.h (PPC64_OPT_LOCALENTRY): Define.
	* sysdeps/alpha/dl-machine.h (elf_machine_fixup_plt): Add
	refsym and sym parameters.  Adjust callers.
	* sysdeps/aarch64/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/arm/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/generic/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/hppa/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/i386/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/ia64/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/m68k/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/microblaze/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/mips/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/nios2/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/powerpc/powerpc32/dl-machine.h (elf_machine_fixup_plt):
	Likewise.
	* sysdeps/s390/s390-32/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/s390/s390-64/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/sh/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/sparc/sparc32/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/sparc/sparc64/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/tile/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/x86_64/dl-machine.h (elf_machine_fixup_plt): Likewise.
	* sysdeps/powerpc/powerpc64/dl-machine.c (_dl_error_localentry): New.
	(_dl_reloc_overflow): Increase buffser size.  Formatting.
	* sysdeps/powerpc/powerpc64/dl-machine.h (ppc64_local_entry_offset):
	Delete reloc param, add refsym and sym.  Check optimized plt
	call stubs for localentry:0 functions.  Adjust callers.
	(elf_machine_fixup_plt, elf_machine_plt_conflict): Add refsym
	and sym parameters.  Adjust callers.
	(_dl_reloc_overflow): Move attribute.
	(_dl_error_localentry): Declare.
	* elf/dl-runtime.c (_dl_fixup): Save original sym.  Pass
	refsym and sym to elf_machine_fixup_plt.
	* elf/testobj6.c (preload): Call printf.
 2017-06-14 10:47:25 +09:30
Stefan Liebler
12d2dd7060 Optimize generic spinlock code and use C11 like atomic macros. 
This patch optimizes the generic spinlock code.

The type pthread_spinlock_t is a typedef to volatile int on all archs.
Passing a volatile pointer to the atomic macros which are not mapped to the
C11 atomic builtins can lead to extra stores and loads to stack if such
a macro creates a temporary variable by using "__typeof (*(mem)) tmp;".
Thus, those macros which are used by spinlock code - atomic_exchange_acquire,
atomic_load_relaxed, atomic_compare_exchange_weak - have to be adjusted.
According to the comment from  Szabolcs Nagy, the type of a cast expression is
unqualified (see http://www.open-std.org/jtc1/sc22/wg14/www/docs/dr_423.htm):
__typeof ((__typeof (*(mem)) *(mem)) tmp;
Thus from spinlock perspective the variable tmp is of type int instead of
type volatile int.  This patch adjusts those macros in include/atomic.h.
With this construct GCC >= 5 omits the extra stores and loads.

The atomic macros are replaced by the C11 like atomic macros and thus
the code is aligned to it.  The pthread_spin_unlock implementation is now
using release memory order instead of sequentially consistent memory order.
The issue with passed volatile int pointers applies to the C11 like atomic
macros as well as the ones used before.

I've added a glibc_likely hint to the first atomic exchange in
pthread_spin_lock in order to return immediately to the caller if the lock is
free.  Without the hint, there is an additional jump if the lock is free.

I've added the atomic_spin_nop macro within the loop of plain reads.
The plain reads are also realized by C11 like atomic_load_relaxed macro.

The new define ATOMIC_EXCHANGE_USES_CAS determines if the first try to acquire
the spinlock in pthread_spin_lock or pthread_spin_trylock is an exchange
or a CAS.  This is defined in atomic-machine.h for all architectures.

The define SPIN_LOCK_READS_BETWEEN_CMPXCHG is now removed.
There is no technical reason for throwing in a CAS every now and then,
and so far we have no evidence that it can improve performance.
If that would be the case, we have to adjust other spin-waiting loops
elsewhere, too!  Using a CAS loop without plain reads is not a good idea
on many targets and wasn't used by one.  Thus there is now no option to
do so.

Architectures are now using the generic spinlock automatically if they
do not provide an own implementation.  Thus the pthread_spin_lock.c files
in sysdeps folder are deleted.

ChangeLog:

	* NEWS: Mention new spinlock implementation.
	* include/atomic.h:
	(__atomic_val_bysize): Cast type to omit volatile qualifier.
	(atomic_exchange_acq): Likewise.
	(atomic_load_relaxed): Likewise.
	(ATOMIC_EXCHANGE_USES_CAS): Check definition.
	* nptl/pthread_spin_init.c (pthread_spin_init):
	Use atomic_store_relaxed.
	* nptl/pthread_spin_lock.c (pthread_spin_lock):
	Use C11-like atomic macros.
	* nptl/pthread_spin_trylock.c (pthread_spin_trylock):
	Likewise.
	* nptl/pthread_spin_unlock.c (pthread_spin_unlock):
	Use atomic_store_release.
	* sysdeps/aarch64/nptl/pthread_spin_lock.c: Delete File.
	* sysdeps/arm/nptl/pthread_spin_lock.c: Likewise.
	* sysdeps/hppa/nptl/pthread_spin_lock.c: Likewise.
	* sysdeps/m68k/nptl/pthread_spin_lock.c: Likewise.
	* sysdeps/microblaze/nptl/pthread_spin_lock.c: Likewise.
	* sysdeps/mips/nptl/pthread_spin_lock.c: Likewise.
	* sysdeps/nios2/nptl/pthread_spin_lock.c: Likewise.
	* sysdeps/aarch64/atomic-machine.h (ATOMIC_EXCHANGE_USES_CAS): Define.
	* sysdeps/alpha/atomic-machine.h: Likewise.
	* sysdeps/arm/atomic-machine.h: Likewise.
	* sysdeps/i386/atomic-machine.h: Likewise.
	* sysdeps/ia64/atomic-machine.h: Likewise.
	* sysdeps/m68k/coldfire/atomic-machine.h: Likewise.
	* sysdeps/m68k/m680x0/m68020/atomic-machine.h: Likewise.
	* sysdeps/microblaze/atomic-machine.h: Likewise.
	* sysdeps/mips/atomic-machine.h: Likewise.
	* sysdeps/powerpc/powerpc32/atomic-machine.h: Likewise.
	* sysdeps/powerpc/powerpc64/atomic-machine.h: Likewise.
	* sysdeps/s390/atomic-machine.h: Likewise.
	* sysdeps/sparc/sparc32/atomic-machine.h: Likewise.
	* sysdeps/sparc/sparc32/sparcv9/atomic-machine.h: Likewise.
	* sysdeps/sparc/sparc64/atomic-machine.h: Likewise.
	* sysdeps/tile/tilegx/atomic-machine.h: Likewise.
	* sysdeps/tile/tilepro/atomic-machine.h: Likewise.
	* sysdeps/unix/sysv/linux/hppa/atomic-machine.h: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/atomic-machine.h: Likewise.
	* sysdeps/unix/sysv/linux/nios2/atomic-machine.h: Likewise.
	* sysdeps/unix/sysv/linux/sh/atomic-machine.h: Likewise.
	* sysdeps/x86_64/atomic-machine.h: Likewise.
 2017-06-06 09:41:56 +02:00
Joseph Myers
139904b7e4 Fix more namespace issues in sys/ucontext.h (bug 21457). 
Continuing the fixes for namespace issues in sys/ucontext.h, this
patch moves various symbols into the implementation namespace in the
absence of __USE_MISC.  As with previous changes, it is nonexhaustive,
just covering more straightforward cases.

Structure fields are generally changed to have a prefix __ in the
absence of __USE_MISC, via a macro __ctx (used without a space before
the open parenthesis, since the result is a single identifier).
Various macros such as NGREG also have leading __ added.  No changes
are made to structure tags (and thus to C++ name mangling), except
that in the (unused) file sysdeps/i386/sys/ucontext.h, structures
defined inside other structures as the type for a field have their
tags removed in the non-__USE_MISC case (those structure tags would
not in any case have been visible in C++, because in C++ the scope of
such a tag is limited to the containing structure).  No changes are
made to the contents of bits/sigcontext.h, or to whether it is
included.  Because of remaining namespace issues, this patch does not
yet fix the bug or allow any XFAILs to be removed.

Tested for x86_64 and x86, and with build-many-glibcs.py.

	[BZ #21457]
	* sysdeps/arm/sys/ucontext.h (NGREG): Rename to __NGREG and define
	NGREG to __NGREG if [__USE_MISC].
	(gregset_t): Define using __NGREG.
	(__ctx): New macro.
	(mcontext_t): Use __ctx in defining fields.
	* sysdeps/i386/sys/ucontext.h (NGREG): Rename to __NGREG and
	define NGREG to __NGREG if [__USE_MISC].
	(gregset_t): Define using __NGREG.
	(__ctx): New macro.
	(__ctxt): Likewise.
	(fpregset_t): Use __ctx and __ctxt in defining fields.
	(mcontext_t): Likewise.
	* sysdeps/m68k/sys/ucontext.h (NGREG): Rename to __NGREG and
	define NGREG to __NGREG if [__USE_MISC].
	(gregset_t): Define using __NGREG.
	(__ctx): New macro.
	(mcontext_t): Use __ctx in defining fields.
	* sysdeps/mips/sys/ucontext.h (NGREG): Rename to __NGREG and
	define NGREG to __NGREG if [__USE_MISC].
	(gregset_t): Define using __NGREG.
	(__ctx): New macro.
	(fpregset_t): Use __ctx in defining fields.
	(mcontext_t): Likewise.
	* sysdeps/unix/sysv/linux/alpha/sys/ucontext.h (NGREG): Rename to
	__NGREG and define NGREG to __NGREG if [__USE_MISC].
	(gregset_t): Define using __NGREG.
	(NFPREG): Rename to __NFPREG and define NFPREG to __NFPREG if
	[__USE_MISC].
	(fpregset_t): Define using __NFPREG.
	* sysdeps/unix/sysv/linux/m68k/sys/ucontext.h (NGREG): Rename to
	__NGREG and define NGREG to __NGREG if [__USE_MISC].
	(gregset_t): Define using __NGREG.
	(__ctx): New macro.
	(fpregset_t): Use __ctx in defining fields.
	(mcontext_t): Likewise.
	* sysdeps/unix/sysv/linux/mips/sys/ucontext.h (NGREG): Rename to
	__NGREG and define NGREG to __NGREG if [__USE_MISC].
	(NFPREG): Rename to __NFPREG and define NFPREG to __NFPREG if
	[__USE_MISC].
	(gregset_t): Define using __NGREG.
	(__ctx): New macro.
	(fpregset_t): Use __ctx in defining fields.
	(mcontext_t): Likewise.
	* sysdeps/unix/sysv/linux/nios2/sys/ucontext.h (__ctx): New macro.
	(mcontext_t): Use __ctx in defining fields.
	* sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h (__ctx): New
	macro.
	[__WORDSIZE == 32] (NGREG): Rename to __NGREG and define NGREG to
	__NGREG if [__USE_MISC].
	[__WORDSIZE == 32] (gregset_t): Define using __NGREG.
	[__WORDSIZE == 32] (fpregset_t): Use __ctx in defining fields.
	(mcontext_t): Likewise.
	[__WORDSIZE != 32] (NGREG): Rename to __NGREG and define NGREG to
	__NGREG if [__USE_MISC].
	[__WORDSIZE != 32] (NFPREG): Rename to __NFPREG and define NFPREG
	to __NFPREG if [__USE_MISC].
	[__WORDSIZE != 32] (NVRREG): Rename to __NVRREG and define NVRREG
	to __NVRREG if [__USE_MISC].
	[__WORDSIZE != 32] (gregset_t): Define using __NGREG.
	[__WORDSIZE != 32] (fpregset_t): Define using __NFPREG.
	[__WORDSIZE != 32] (vscr_t): Use __ctx in defining fields.
	[__WORDSIZE != 32] (vrregset_t): Likewise.
	[__WORDSIZE != 32] (mcontext_t): Likewise.
	* sysdeps/unix/sysv/linux/s390/sys/ucontext.h (__ctx): New macro.
	(__psw_t): Use __ctx in defining fields.
	(NGREG): Rename to __NGREG and define NGREG to __NGREG if
	[__USE_MISC].
	(gregset_t): Define using __NGREG.
	(fpreg_t): Use __ctx in defining fields.
	(fpregset_t): Likewise.
	(mcontext_t): Likewise.
	* sysdeps/unix/sysv/linux/sh/sys/ucontext.h (NGREG): Rename to
	__NGREG and define NGREG to __NGREG if [__USE_MISC].
	(gregset_t): Define using __NGREG.
	(NFPREG): Rename to __NFPREG and define NFPREG to __NFPREG if
	[__USE_MISC].
	(fpregset_t): Define using __NFPREG.
	(__ctx): New macro.
	(mcontext_t): Use __ctx in defining fields.
	* sysdeps/unix/sysv/linux/x86/sys/ucontext.h (__ctx): New macro.
	[__x86_64__] (NGREG): Rename to __NGREG and define NGREG to
	__NGREG if [__USE_MISC].
	[__x86_64__] (gregset_t): Define using __NGREG.
	[__x86_64__] (struct _libc_fpxreg): Use __ctx in defining fields.
	[__x86_64__] (struct _libc_fpstate): Likewise.
	[__x86_64__] (mcontext_t): Likewise.
	[!__x86_64__] (NGREG): Rename to __NGREG and define NGREG to
	__NGREG if [__USE_MISC].
	[!__x86_64__] (gregset_t): Define using __NGREG.
	[!__x86_64__] (struct _libc_fpreg): Use __ctx in defining fields.
	[!__x86_64__] (struct _libc_fpstate): Likewise.
	[!__x86_64__] (mcontext_t): Likewise.
 2017-06-01 14:07:40 +00:00
Joseph Myers
cfed8ece79 Fix sys/ucontext.h namespace from signal.h etc. inclusion (bug 21457). 
The various sys/ucontext.h headers include <signal.h> and all the
headers split out of <bits/sigstack.h>.  (Except that the powerpc
version does not include <signal.h>.)

None of the standard versions defining ucontext.h require or permit
such inclusions; rather, they all say that the stack_t and sigset_t
types from signal.h are defined.  This patch fixes the headers to
include just the bits/ headers for those types (and the existing
includes of bits/sigcontext.h).  Since bits/types/sigset_t.h is now
being included instead of bits/types/__sigset_t.h, __sigset_t uses in
the headers are replaced by direct use of the public sigset_t type.
sysdeps/unix/sysv/linux/x86/bits/sigcontext.h was relying on the prior
inclusion of <signal.h> to define types such as __uint32_t, so gets a
bits/types.h include added to provide those types.

Although one could keep some or all of the includes under a __USE_MISC
conditional, that seems unnecessary to me, especially given the lack
of a <signal.h> include in the powerpc version meaning that portable
programs already cannot rely on such an include.

Tested for x86_64 and x86, and with build-many-glibcs.py.  As with
other such fixes, more namespace issues remain so this does not permit
any XFAILs to be removed or bugs to be closed.

	[BZ #21457]
	* sysdeps/arm/sys/ucontext.h: Do not include <signal.h>,
	<bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h> instead of
	<bits/types/__sigset_t.h>.
	(ucontext_t): Use sigset_t instead of __sigset_t.
	* sysdeps/generic/sys/ucontext.h: Do not include <signal.h>,
	<bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h> instead of
	<bits/types/__sigset_t.h>.
	(ucontext_t): Use sigset_t instead of __sigset_t.
	* sysdeps/i386/sys/ucontext.h: Do not include <signal.h>,
	<bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h> instead of
	<bits/types/__sigset_t.h>.
	(ucontext_t): Use sigset_t instead of __sigset_t.
	* sysdeps/m68k/sys/ucontext.h: Do not include <signal.h>,
	<bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h> instead of
	<bits/types/__sigset_t.h>.
	(ucontext_t): Use sigset_t instead of __sigset_t.
	* sysdeps/mips/sys/ucontext.h: Do not include <signal.h>,
	<bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h> instead of
	<bits/types/__sigset_t.h>.
	(ucontext_t): Use sigset_t instead of __sigset_t.
	* sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h: Do not include
	<signal.h>, <bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h> instead of
	<bits/types/__sigset_t.h>.
	(ucontext_t): Use sigset_t instead of __sigset_t.
	* sysdeps/unix/sysv/linux/alpha/sys/ucontext.h: Do not include
	<signal.h>, <bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h> instead of
	<bits/types/__sigset_t.h>.
	(ucontext_t): Use sigset_t instead of __sigset_t.
	* sysdeps/unix/sysv/linux/arm/sys/ucontext.h: Do not include
	<signal.h>, <bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h> instead of
	<bits/types/__sigset_t.h>.
	(ucontext_t): Use sigset_t instead of __sigset_t.
	* sysdeps/unix/sysv/linux/hppa/sys/ucontext.h: Do not include
	<signal.h>, <bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h> instead of
	<bits/types/__sigset_t.h>.
	(ucontext_t): Use sigset_t instead of __sigset_t.
	* sysdeps/unix/sysv/linux/ia64/sys/ucontext.h: Do not include
	<signal.h>, <bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h>.
	* sysdeps/unix/sysv/linux/m68k/sys/ucontext.h: Do not include
	<signal.h>, <bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h> instead of
	<bits/types/__sigset_t.h>.
	(ucontext_t): Use sigset_t instead of __sigset_t.
	* sysdeps/unix/sysv/linux/mips/sys/ucontext.h: Do not include
	<signal.h>, <bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h> instead of
	<bits/types/__sigset_t.h>.
	(ucontext_t): Use sigset_t instead of __sigset_t.
	* sysdeps/unix/sysv/linux/nios2/sys/ucontext.h: Do not include
	<signal.h>, <bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h> instead of
	<bits/types/__sigset_t.h>.
	(ucontext_t): Use sigset_t instead of __sigset_t.
	* sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h: Do not include
	<bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.
	* sysdeps/unix/sysv/linux/s390/sys/ucontext.h: Do not include
	<signal.h>, <bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h> instead of
	<bits/types/__sigset_t.h>.
	(ucontext_t): Use sigset_t instead of __sigset_t.
	* sysdeps/unix/sysv/linux/sh/sys/ucontext.h: Do not include
	<signal.h>, <bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h> instead of
	<bits/types/__sigset_t.h>.
	(ucontext_t): Use sigset_t instead of __sigset_t.
	* sysdeps/unix/sysv/linux/sparc/sys/ucontext.h: Do not include
	<signal.h>, <bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h> instead of
	<bits/types/__sigset_t.h>.
	(ucontext_t): Use sigset_t instead of __sigset_t.
	* sysdeps/unix/sysv/linux/tile/sys/ucontext.h: Do not include
	<signal.h>, <bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h> instead of
	<bits/types/__sigset_t.h>.
	(ucontext_t): Use sigset_t instead of __sigset_t.
	* sysdeps/unix/sysv/linux/x86/bits/sigcontext.h: Include
	<bits/types.h>.
	* sysdeps/unix/sysv/linux/x86/sys/ucontext.h: Do not include
	<signal.h>, <bits/sigstack.h>, <bits/types/struct_sigstack.h> or
	<bits/ss_flags.h>.  Include <bits/types/sigset_t.h> instead of
	<bits/types/__sigset_t.h>.
	(ucontext_t): Use sigset_t instead of __sigset_t.
 2017-05-23 11:49:48 +00:00
Zack Weinberg
a992f506ff Remove __need macros from signal.h. 
The types affected are __sig_atomic_t, sig_atomic_t, __sigset_t,
sigset_t, sigval_t, sigevent_t, and siginfo_t. __sig_atomic_t is a
scalar, so it's now directly available from bits/types.h.  The others
get bits/types/ headers.

Side effects include: There have been small changes to which
non-signal headers expose which subset of the signal-related types.
A couple of architectures' nested siginfo_t fields had to be renamed
to prevent undesired macro expansion.  Internal code that wants to
manipulate signal masks must now include <sigsetops.h> (which is not
installed) and should be aware that __sigaddset, __sigandset,
__sigdelset, __sigemptyset, and __sigorset no longer return a value
(unlike the public API).  Relatedly, the public signal.h no longer
declares any of those functions.  The obsolete sigmask() macro no
longer has a system-specific definition -- in the cases where it
matters, it didn't work anyway.

New Linux architectures should create bits/siginfo-arch.h and/or
bits/siginfo-consts-arch.h to customize their siginfo_t, rather than
duplicating everything in bits/siginfo.h (which no longer exists).
Add new __SI_* macros if necessary.  Ports to other operating systems
are strongly encouraged to generalize this scheme further.

	* bits/sigevent-consts.h
	* bits/siginfo-consts.h
	* bits/types/__sigset_t.h
	* bits/types/sigevent_t.h
	* bits/types/siginfo_t.h
	* sysdeps/unix/sysv/linux/bits/sigevent-consts.h
	* sysdeps/unix/sysv/linux/bits/siginfo-consts.h
	* sysdeps/unix/sysv/linux/bits/types/__sigset_t.h
	* sysdeps/unix/sysv/linux/bits/types/sigevent_t.h
	* sysdeps/unix/sysv/linux/bits/types/siginfo_t.h:
	New system-dependent bits headers.

	* sysdeps/unix/sysv/linux/bits/siginfo-arch.h
	* sysdeps/unix/sysv/linux/bits/siginfo-consts-arch.h
	* sysdeps/unix/sysv/linux/ia64/bits/siginfo-arch.h
	* sysdeps/unix/sysv/linux/ia64/bits/siginfo-consts-arch.h
	* sysdeps/unix/sysv/linux/mips/bits/siginfo-arch.h
	* sysdeps/unix/sysv/linux/sparc/bits/siginfo-arch.h
	* sysdeps/unix/sysv/linux/tile/bits/siginfo-arch.h
	* sysdeps/unix/sysv/linux/tile/bits/siginfo-consts-arch.h
	* sysdeps/unix/sysv/linux/x86/bits/siginfo-arch.h:
	New Linux-only system-dependent bits headers.

	* signal/bits/types/sig_atomic_t.h
	* signal/bits/types/sigset_t.h
	* signal/bits/types/sigval_t.h:
	New non-system-dependent bits headers.

	* sysdeps/generic/sigsetops.h
	* sysdeps/unix/sysv/linux/sigsetops.h:
	New internal headers.

	* include/bits/types/sig_atomic_t.h
	* include/bits/types/sigset_t.h
	* include/bits/types/sigval_t.h:
	New wrappers.

	* signal/sigsetops.h
	* bits/siginfo.h
	* bits/sigset.h
	* sysdeps/unix/sysv/linux/bits/siginfo.h
	* sysdeps/unix/sysv/linux/bits/sigset.h
	* sysdeps/unix/sysv/linux/ia64/bits/siginfo.h
	* sysdeps/unix/sysv/linux/mips/bits/siginfo.h
	* sysdeps/unix/sysv/linux/s390/bits/siginfo.h
	* sysdeps/unix/sysv/linux/sparc/bits/siginfo.h
	* sysdeps/unix/sysv/linux/tile/bits/siginfo.h
	* sysdeps/unix/sysv/linux/x86/bits/siginfo.h:
	Deleted.

	* signal/Makefile, sysdeps/unix/sysv/linux/Makefile:
	Update lists of installed headers.

	* posix/bits/types.h: Define __sig_atomic_t here.
	* signal/signal.h: Use the new bits headers; no need to handle
	__need_sig_atomic_t nor __need_sigset_t.  Don't use __sigmask
	to define sigmask.
	* include/signal.h: No need to handle __need_sig_atomic_t
	nor __need_sigset_t.  Don't define __sigemptyset.

	* io/sys/poll.h, setjmp/setjmp.h
	* sysdeps/arm/sys/ucontext.h, sysdeps/generic/sys/ucontext.h
	* sysdeps/i386/sys/ucontext.h, sysdeps/m68k/sys/ucontext.h
	* sysdeps/mach/hurd/i386/bits/sigcontext.h
	* sysdeps/mips/sys/ucontext.h, sysdeps/powerpc/novmxsetjmp.h
	* sysdeps/pthread/bits/sigthread.h
	* sysdeps/unix/sysv/linux/hppa/sys/ucontext.h
	* sysdeps/unix/sysv/linux/m68k/sys/ucontext.h
	* sysdeps/unix/sysv/linux/mips/sys/ucontext.h
	* sysdeps/unix/sysv/linux/nios2/sys/ucontext.h
	* sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h
	* sysdeps/unix/sysv/linux/s390/sys/ucontext.h
	* sysdeps/unix/sysv/linux/sh/sys/ucontext.h
	* sysdeps/unix/sysv/linux/sparc/sys/ucontext.h
	* sysdeps/unix/sysv/linux/tile/sys/ucontext.h
	* sysdeps/unix/sysv/linux/x86/sys/ucontext.h:
	Use bits/types/__sigset_t.h.

	* misc/sys/select.h, posix/spawn.h
	* sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h
	* sysdeps/unix/sysv/linux/sys/epoll.h
	* sysdeps/unix/sysv/linux/sys/signalfd.h:
	Use bits/types/sigset_t.h.

	* resolv/netdb.h, rt/mqueue.h: Use bits/types/sigevent_t.h.
	* rt/aio.h: Use bits/types/sigevent_t.h and bits/sigevent-consts.h.
	* socket/sys/socket.h: Don't include bits/sigset.h.

	* login/utmp_file.c, shadow/lckpwdf.c, signal/sigandset.c
	* signal/sigisempty.c, stdlib/abort.c, sysdeps/posix/profil.c
	* sysdeps/posix/sigignore.c, sysdeps/posix/sigintr.c
	* sysdeps/posix/signal.c, sysdeps/posix/sigset.c
	* sysdeps/posix/sprofil.c, sysdeps/posix/sysv_signal.c
	* sysdeps/unix/sysv/linux/nptl-signals.h:
	Include sigsetops.h.

	* signal/sigaddset.c, signal/sigandset.c, signal/sigdelset.c
	* signal/sigorset.c, stdlib/abort.c, sysdeps/posix/sigignore.c
	* sysdeps/posix/signal.c, sysdeps/posix/sigset.c:
	__sigaddset, __sigandset, __sigdelset, __sigemptyset, __sigorset
	now return no value.

	* signal/sigaddset.c, signal/sigdelset.c, signal/sigismem.c
	Include <errno.h>, <signal.h>, and <sigsetops.h> instead of
	"sigsetops.h".

	* signal/sigsetops.c: Explicitly define __sigismember,
	__sigaddset, and __sigdelset as compatibility symbols.

	* signal/Versions: Correct commentary on __sigpause,
	__sigaddset, __sigdelset, __sigismember.

	* inet/rcmd.c: Include sigsetops.h.  Convert old code using
	__sigblock/__sigsetmask to use __sigprocmask and friends.
 2017-05-20 19:04:43 -04:00
Joseph Myers
0bcec5321f Split up bits/sigstack.h. 
bits/sigstack.h contains four things: the legacy struct sigstack type,
the preferred stack_t type, the SS_* enum values and macros for signal
stack sizes.

These vary in different ways between glibc configurations; in
particular, the stack sizes vary much more than any of the other
pieces.  Furthermore, these pieces have different standard namespace
rules for when they should be visible (not currently visible in
conform/ results both because the relevant tests are XFAILed for
sys/ucontext.h namespace issues, and because some of the expectations
are incorrect in the same way as the headers, e.g. neither
expectations nor headers reflect that current POSIX no longer has
either the sigstack function or the sigstack structure).

To reduce duplication of identical definitions, and facilitate
namespace fixes without requiring the same feature test macro
conditions to be repeated in many versions of the same header, this
patch splits bits/sigstack.h up into four headers.  It keeps the stack
size macros, while new bits/types/struct_sigstack.h,
bits/types/stack_t.h and bits/ss_flags.h are added for the other
pieces.  bits/types/struct_sigstack.h is the same everywhere,
bits/types/stack_t.h has three variants different in the order of the
structure elements (generic = MIPS Linux, and other Linux), and
bits/ss_flags.h has generic and Linux variants.

This patch includes the new headers everywhere that included
<bits/sigstack.h>, so should cause no difference to what any public
header defines.  Subsequent namespace fixes would then remove or
condition some of those includes.

There should be no conflicts with Zack's changes to signal.h types,
beyond the trivial conflict of both making additions to
signal/Makefile's headers list; the two patches affect disjoint sets
of types and other definitions.

Tested for x86_64 and x86, and with build-many-glibcs.py.

	* bits/ss_flags.h: New file.
	* bits/types/stack_t.h: Likewise.
	* include/bits/types/struct_sigstack.h: Likewise.
	* signal/bits/types/struct_sigstack.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/ss_flags.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/types/stack_t.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/types/stack_t.h: Likewise.
	* signal/Makefile (headers): Add bits/types/struct_sigstack.h,
	bits/types/stack_t.h and bits/ss_flags.h.
	* signal/signal.h [__USE_XOPEN_EXTENDED || __USE_XOPEN2K8]:
	Include <bits/types/struct_sigstack.h>, <bits/types/stack_t.h> and
	<bits/ss_flags.h>.
	* bits/sigstack.h (struct sigstack): Remove.
	(stack_t): Likewise.
	(SS_ONSTACK): Likewise.
	(SS_DISABLE): Likewise.
	* sysdeps/unix/sysv/linux/aarch64/bits/sigstack.h
	(struct sigstack): Likewise.
	(stack_t): Likewise.
	(SS_ONSTACK): Likewise.
	(SS_DISABLE): Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/sigstack.h (struct sigstack):
	Likewise.
	(stack_t): Likewise.
	(SS_ONSTACK): Likewise.
	(SS_DISABLE): Likewise.
	* sysdeps/unix/sysv/linux/bits/sigstack.h (struct sigstack):
	Likewise.
	(stack_t): Likewise.
	(SS_ONSTACK): Likewise.
	(SS_DISABLE): Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/sigstack.h: Likewise.
	* sysdeps/unix/sysv/linux/ia64/bits/sigstack.h (struct sigstack):
	Likewise.
	(stack_t): Likewise.
	(SS_ONSTACK): Likewise.
	(SS_DISABLE): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/bits/sigstack.h
	(struct sigstack): Likewise.
	(stack_t): Likewise.
	(SS_ONSTACK): Likewise.
	(SS_DISABLE): Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/sigstack.h (struct sigstack):
	Likewise.
	(stack_t): Likewise.
	(SS_ONSTACK): Likewise.
	(SS_DISABLE): Likewise.
	* sysdeps/arm/sys/ucontext.h: Include
	<bits/types/struct_sigstack.h>, <bits/types/stack_t.h> and
	<bits/ss_flags.h>.
	* sysdeps/generic/sys/ucontext.h: Likewise.
	* sysdeps/i386/sys/ucontext.h: Likewise.
	* sysdeps/m68k/sys/ucontext.h: Likewise.
	* sysdeps/mips/sys/ucontext.h: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/sys/ucontext.h: Likewise.
	* sysdeps/unix/sysv/linux/arm/sys/ucontext.h: Likewise.
	* sysdeps/unix/sysv/linux/hppa/sys/ucontext.h: Likewise.
	* sysdeps/unix/sysv/linux/ia64/bits/sigcontext.h: Likewise.
	* sysdeps/unix/sysv/linux/ia64/sys/ucontext.h: Likewise.
	* sysdeps/unix/sysv/linux/m68k/sys/ucontext.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/sys/ucontext.h: Likewise.
	* sysdeps/unix/sysv/linux/nios2/sys/ucontext.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h: Likewise.
	* sysdeps/unix/sysv/linux/s390/sys/ucontext.h: Likewise.
	* sysdeps/unix/sysv/linux/sh/sys/ucontext.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sys/ucontext.h: Likewise.
	* sysdeps/unix/sysv/linux/tile/sys/ucontext.h: Likewise.
	* sysdeps/unix/sysv/linux/x86/sys/ucontext.h: Likewise.
 2017-05-19 20:35:07 +00:00
H.J. Lu
402bf06952 x86: Optimize SSE2 memchr overflow calculation 
SSE2 memchr computes "edx + ecx - 16" where ecx is less than 16.  Use
"edx - (16 - ecx)", instead of satured math, to avoid possible addition
overflow.  This replaces

	add	%ecx, %edx
	sbb	%eax, %eax
	or	%eax, %edx
	sub	$16, %edx

with

	neg	%ecx
	add	$16, %ecx
	sub	%ecx, %edx

It is the same for x86_64, except for rcx/rdx, instead of ecx/edx.

	* sysdeps/i386/i686/multiarch/memchr-sse2.S (MEMCHR): Use
	"edx + ecx - 16" to avoid possible addition overflow.
	* sysdeps/x86_64/memchr.S (memchr): Likewise.
 2017-05-19 10:48:45 -07:00
Joseph Myers
5df4854ed2 Condition some sys/ucontext.h contents on __USE_MISC (bug 21457). 
Continuing the fixes for namespace issues arising from sys/ucontext.h,
this patch conditions various definitions, that are not needed for
defining mcontext_t / ucontext_t, on __USE_MISC, so they do not appear
in strict POSIX modes.

This patch is non-exhaustive; that is, it only conditions
straightforward cases and there may be more such definitions that can
be conditioned for these and other architectures, to be dealt with
later in separate patches.  Also, using __USE_MISC is the minimum
change for these definitions where they conflict with POSIX; some
headers already have __USE_GNU conditionals on similar definitions of
names for registers.  The patch specifically does not do anything with
definitions in bits/sigcontext.h, and nor does it condition any
inclusions of bits/sigcontext.h even where in fact that is not needed
on some architectures for the definitions of mcontext_t / ucontext_t.

As other namespace issues in these headers remain, this patch does not
fix bug 21457, nor allow any XFAILs to be removed.

Tested with build-many-glibcs.py.

	[BZ #21457]
	* sysdeps/arm/sys/ucontext.h (R0): Condition on [__USE_MISC].
	(R1): Likewise.
	(R2): Likewise.
	(R3): Likewise.
	(R4): Likewise.
	(R5): Likewise.
	(R6): Likewise.
	(R7): Likewise.
	(R8): Likewise.
	(R9): Likewise.
	(R10): Likewise.
	(R11): Likewise.
	(R12): Likewise.
	(R13): Likewise.
	(R14): Likewise.
	(R15): Likewise.
	* sysdeps/i386/sys/ucontext.h (REG_GS): Likewise.
	(REG_FS): Likewise.
	(REG_ES): Likewise.
	(REG_DS): Likewise.
	(REG_EDI): Likewise.
	(REG_ESI): Likewise.
	(REG_EBP): Likewise.
	(REG_ESP): Likewise.
	(REG_EBX): Likewise.
	(REG_EDX): Likewise.
	(REG_ECX): Likewise.
	(REG_EAX): Likewise.
	(REG_TRAPNO): Likewise.
	(REG_ERR): Likewise.
	(REG_EIP): Likewise.
	(REG_CS): Likewise.
	(REG_EFL): Likewise.
	(REG_UESP): Likewise.
	(REG_SS): Likewise.
	* sysdeps/m68k/sys/ucontext.h (R_D0): Likewise.
	(R_D1): Likewise.
	(R_D2): Likewise.
	(R_D3): Likewise.
	(R_D4): Likewise.
	(R_D5): Likewise.
	(R_D6): Likewise.
	(R_D7): Likewise.
	(R_A0): Likewise.
	(R_A1): Likewise.
	(R_A2): Likewise.
	(R_A3): Likewise.
	(R_A4): Likewise.
	(R_A5): Likewise.
	(R_A6): Likewise.
	(R_A7): Likewise.
	(R_SP): Likewise.
	(R_PC): Likewise.
	(R_PS): Likewise.
	(fpregset_t): Likewise.
	(MCONTEXT_VERSION): Likewise.
	* sysdeps/mips/sys/ucontext.h (CTX_R0): Likewise.
	(CTX_AT): Likewise.
	(CTX_V0): Likewise.
	(CTX_V1): Likewise.
	(CTX_A0): Likewise.
	(CTX_A1): Likewise.
	(CTX_A2): Likewise.
	(CTX_A3): Likewise.
	(CTX_T0): Likewise.
	(CTX_T1): Likewise.
	(CTX_T2): Likewise.
	(CTX_T3): Likewise.
	(CTX_T4): Likewise.
	(CTX_T5): Likewise.
	(CTX_T6): Likewise.
	(CTX_T7): Likewise.
	(CTX_S0): Likewise.
	(CTX_S1): Likewise.
	(CTX_S2): Likewise.
	(CTX_S3): Likewise.
	(CTX_S4): Likewise.
	(CTX_S5): Likewise.
	(CTX_S6): Likewise.
	(CTX_S7): Likewise.
	(CTX_T8): Likewise.
	(CTX_T9): Likewise.
	(CTX_K0): Likewise.
	(CTX_K1): Likewise.
	(CTX_GP): Likewise.
	(CTX_SP): Likewise.
	(CTX_S8): Likewise.
	(CTX_RA): Likewise.
	(CTX_MDLO): Likewise.
	(CTX_MDHI): Likewise.
	(CTX_CAUSE): Likewise.
	(CTX_EPC): Likewise.
	* sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h: Condition
	inclusion of <sys/procfs.h> on [__USE_MISC].
	(greg_t): Condition on [__USE_MISC].
	(gregset_t): Likewise.
	(fpregset_t): Likewise.
	* sysdeps/unix/sysv/linux/arm/sys/ucontext.h (greg_t): Likewise.
	(NGREG): Likewise.
	(gregset_t): Likewise.
	(REG_R0): Likewise.
	(REG_R1): Likewise.
	(REG_R2): Likewise.
	(REG_R3): Likewise.
	(REG_R4): Likewise.
	(REG_R5): Likewise.
	(REG_R6): Likewise.
	(REG_R7): Likewise.
	(REG_R8): Likewise.
	(REG_R9): Likewise.
	(REG_R10): Likewise.
	(REG_R11): Likewise.
	(REG_R12): Likewise.
	(REG_R13): Likewise.
	(REG_R14): Likewise.
	(REG_R15): Likewise.
	(struct _libc_fpstate): Likewise.
	(fpregset_t): Likewise.
	* sysdeps/unix/sysv/linux/hppa/sys/ucontext.h (NGREG): Likewise.
	(NFPREG): Likewise.
	(gregset_t): Likewise.
	(fpregset_t): Likewise.
	* sysdeps/unix/sysv/linux/m68k/sys/ucontext.h (R_D0): Likewise.
	(R_D1): Likewise.
	(R_D2): Likewise.
	(R_D3): Likewise.
	(R_D4): Likewise.
	(R_D5): Likewise.
	(R_D6): Likewise.
	(R_D7): Likewise.
	(R_A0): Likewise.
	(R_A1): Likewise.
	(R_A2): Likewise.
	(R_A3): Likewise.
	(R_A4): Likewise.
	(R_A5): Likewise.
	(R_A6): Likewise.
	(R_A7): Likewise.
	(R_SP): Likewise.
	(R_PC): Likewise.
	(R_PS): Likewise.
	(fpregset_t): Likewise.
	(MCONTEXT_VERSION): Likewise.
	* sysdeps/unix/sysv/linux/nios2/sys/ucontext.h (MCONTEXT_VERSION):
	Likewise.
	* sysdeps/unix/sysv/linux/sh/sys/ucontext.h (REG_R0): Likewise.
	(REG_R1): Likewise.
	(REG_R2): Likewise.
	(REG_R3): Likewise.
	(REG_R4): Likewise.
	(REG_R5): Likewise.
	(REG_R6): Likewise.
	(REG_R7): Likewise.
	(REG_R8): Likewise.
	(REG_R9): Likewise.
	(REG_R10): Likewise.
	(REG_R11): Likewise.
	(REG_R12): Likewise.
	(REG_R13): Likewise.
	(REG_R14): Likewise.
	(REG_R15): Likewise.
	* sysdeps/unix/sysv/linux/tile/sys/ucontext.h: Condition inclusion
	of <arch/abi.h> on [__USE_MISC].
	(greg_t): Condition on [__USE_MISC].
	(NGREG): Likewise.
	(gregset_t): Likewise.
 2017-05-11 14:15:26 +00:00
H.J. Lu
1432d38ea0 x86: Set dl_platform and dl_hwcap from CPU features [BZ #21391] 
dl_platform and dl_hwcap are set from AT_PLATFORM and AT_HWCAP very
early during startup.  They are used by dynamic linker to determine
platform and build an array of hardware capability names, which are
added to search path when loading shared object.  dl_platform and
dl_hwcap are unused on x86-64.  On i386, i386, i486, i586 and i686
platforms were supported and only SSE2 capability was used.

On x86, usage of AT_PLATFORM and AT_HWCAP to determine platform and
processor capabilities is obsolete since all information is available
in dl_x86_cpu_features.  This patch sets dl_platform and dl_hwcap from
dl_x86_cpu_features in dynamic linker.  On i386, the available plaforms
are changed to i586 and i686 since i386 has been deprecated.  On x86-64,
the available plaforms are haswell, which is for Haswell class processors
with BMI1, BMI2, LZCNT, MOVBE, POPCNT, AVX2 and FMA, and xeon_phi, which
is for Xeon Phi class processors with AVX512F, AVX512CD, AVX512ER and
AVX512PF.  A capability, avx512_1, is also added to x86-64 for AVX512
ISAs: AVX512F, AVX512CD, AVX512BW, AVX512DQ and AVX512VL.

	[BZ #21391]
	* sysdeps/i386/dl-machine.h (dl_platform_init) [IS_IN (rtld)]:
	Only call init_cpu_features.
	[!IS_IN (rtld)]: Only set GLRO(dl_platform) to NULL if needed.
	* sysdeps/x86_64/dl-machine.h (dl_platform_init): Likewise.
	* sysdeps/i386/dl-procinfo.h: Removed.
	* sysdeps/unix/sysv/linux/i386/dl-procinfo.h: Don't include
	<sysdeps/i386/dl-procinfo.h> nor <ldsodefs.h>.  Include
	<sysdeps/x86/dl-procinfo.h>.
	(_dl_procinfo): Replace _DL_HWCAP_COUNT with 32.
	* sysdeps/unix/sysv/linux/x86_64/dl-procinfo.h [!IS_IN (ldconfig)]:
	Include <sysdeps/x86/dl-procinfo.h> instead of
	 <sysdeps/generic/dl-procinfo.h>.
	* sysdeps/x86/cpu-features.c: Include <dl-hwcap.h>.
	(init_cpu_features): Set dl_platform, dl_hwcap and dl_hwcap_mask.
	* sysdeps/x86/cpu-features.h (bit_cpu_LZCNT): New.
	(bit_cpu_MOVBE): Likewise.
	(bit_cpu_BMI1): Likewise.
	(bit_cpu_BMI2): Likewise.
	(index_cpu_BMI1): Likewise.
	(index_cpu_BMI2): Likewise.
	(index_cpu_LZCNT): Likewise.
	(index_cpu_MOVBE): Likewise.
	(index_cpu_POPCNT): Likewise.
	(reg_BMI1): Likewise.
	(reg_BMI2): Likewise.
	(reg_LZCNT): Likewise.
	(reg_MOVBE): Likewise.
	(reg_POPCNT): Likewise.
	* sysdeps/x86/dl-hwcap.h: New file.
	* sysdeps/x86/dl-procinfo.h: Likewise.
	* sysdeps/x86/dl-procinfo.c (_dl_x86_hwcap_flags): New.
	(_dl_x86_platforms): Likewise.
 2017-05-03 13:44:35 -07:00
H.J. Lu
fda19e0438 Add sysdeps/x86/dl-procinfo.c 
Add sysdeps/x86/dl-procinfo.c for x86 version of processor capability
information to reduce duplication between i386 and x86_64 dl-procinfo.c.

	* sysdeps/i386/dl-procinfo.c: Include
	<sysdeps/x86/dl-procinfo.c>.
	* sysdeps/x86_64/dl-procinfo.c: Likewise.
	* sysdeps/x86/dl-procinfo.c: New file.
 2017-04-10 12:01:45 -07:00
H.J. Lu
bf7730194f Check if SSE is available with HAS_CPU_FEATURE 
Similar to other CPU feature checks, check if SSE is available with
HAS_CPU_FEATURE.

	* sysdeps/i386/fpu/fclrexcpt.c (__feclearexcept): Use
	HAS_CPU_FEATURE to check for SSE.
	* sysdeps/i386/fpu/fedisblxcpt.c (fedisableexcept): Likewise.
	* sysdeps/i386/fpu/feenablxcpt.c (feenableexcept): Likewise.
	* sysdeps/i386/fpu/fegetenv.c (__fegetenv): Likewise.
	* sysdeps/i386/fpu/fegetmode.c (fegetmode): Likewise.
	* sysdeps/i386/fpu/feholdexcpt.c (__feholdexcept): Likewise.
	* sysdeps/i386/fpu/fesetenv.c (__fesetenv): Likewise.
	* sysdeps/i386/fpu/fesetmode.c (fesetmode): Likewise.
	* sysdeps/i386/fpu/fesetround.c (__fesetround): Likewise.
	* sysdeps/i386/fpu/feupdateenv.c (__feupdateenv): Likewise.
	* sysdeps/i386/fpu/fgetexcptflg.c (__fegetexceptflag): Likewise.
	* sysdeps/i386/fpu/fsetexcptflg.c (__fesetexceptflag): Likewise.
	* sysdeps/i386/fpu/ftestexcept.c (fetestexcept): Likewise.
	* sysdeps/i386/setfpucw.c (__setfpucw): Likewise.
	* sysdeps/x86/cpu-features.h (bit_cpu_SSE): New.
	(index_cpu_SSE): Likewise.
	(reg_SSE): Likewise.
 2017-04-07 07:44:59 -07:00
Adhemerval Zanella
db3d848e15 Build divdi3 only for architecture that required it 
As noted in [1], divdi3 object is only exported in a handful ABIs
(i386, m68k, powerpc32, s390-32, and ia64), however it is built
for all current architectures regardless.

This patch refact the make rules for this object to so only the
aforementioned architectures that actually require it builds it.

Also, to avoid internal PLT calls to the exported symbol from the
module, glibc uses an internal header (symbol-hacks.h) which is
unrequired (and in fact breaks the build for architectures that
intend to get symbol definitions from libgcc.a).  The patch also
changes it to create its own header (divdi3-symbol-hacks.h) and
adjust the architectures that require it accordingly.

I checked the build/check (with run-built-tests=no) on the
following architectures (which I think must cover all supported
ABI/builds) using GCC 6.3:

aarch64-linux-gnu
alpha-linux-gnu
arm-linux-gnueabihf
hppa-linux-gnu
ia64-linux-gnu
m68k-linux-gnu
microblaze-linux-gnu
mips64-n32-linux-gnu
mips-linux-gnu
mips64-linux-gnu
nios2-linux-gnu
powerpc-linux-gnu
powerpc-linux-gnu-power4
powerpc64-linux-gnu
powerpc64le-linux-gnu
s390x-linux-gnu
s390-linux-gnu
sh4-linux-gnu
sh4-linux-gnu-soft
sparc64-linux-gnu
sparcv9-linux-gnu
tilegx-linux-gnu
tilegx-linux-gnu-32
tilepro-linux-gnu
x86_64-linux-gnu
x86_64-linux-gnu-x32
i686-linux-gnu

I only saw one regression on sparcv9-linux-gnu (extra PLT call to
.udiv) which I address in next patch in the set.  It also correctly
build SH with GCC 7.0.1 (without any regression from c89721e25d).

[1] https://sourceware.org/ml/libc-alpha/2017-03/msg00243.html

	* sysdeps/i386/symbol-hacks.h: New file.
	* sysdeps/m68k/symbol-hacks.h: New file.
	* sysdeps/powerpc/powerpc32/symbol-hacks.h: New file.
	* sysdeps/s390/s390-32/symbol-hacks.h: New file.
	* sysdeps/unix/sysv/linux/i386/Makefile
	[$(subdir) = csu] (sysdep_routines): New rule: divdi3 object.
	[$(subdir) = csu] (sysdep-only-routines): Likewise.
	[$(subdir) = csu] (CFLAGS-divdi3.c): Likewise.
	* sysdeps/unix/sysv/linux/m68k/Makefile
	[$(subdir) = csu] (sysdep_routines): Likewise.
	[$(subdir) = csu] (sysdep-only-routines): Likewise.
	[$(subdir) = csu] (CFLAGS-divdi3.c): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/Makefile
	[$(subdir) = csu] (sysdep_routines): Likewise.
	[$(subdir) = csu] (sysdep-only-routines): Likewise.
	[$(subdir) = csu] (CFLAGS-divdi3.c): Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/Makefile
	[$(subdir) = csu] (sysdep_routines): Likewise.
	[$(subdir) = csu] (sysdep-only-routines): Likewise.
	[$(subdir) = csu] (CFLAGS-divdi3.c): Likewise.
	* sysdeps/wordsize-32/Makefile: Remove file.
	* sysdeps/wordsize-32/symbol-hacks.h: Definitions move to ...
	* sysdeps/wordsize-32/divdi3-symbol-hacks.h: ... here.
 2017-04-06 15:14:34 -03:00
Adhemerval Zanella
a358c80530 Remove CALL_THREAD_FCT macro 
This patch removes CALL_THREAD_FCT macro usage and its defition for
x86.  For 32 bits it usage is only for force 16 stack alignment,
however stack is already explicit aligned in clone syscall.  For
64 bits and x32 it just a function call and there is no need to
code it with inline assembly.

Checked on i686-linux-gnu, x86_64-linux-gnu, and x86_64-linux-gnu-x32.

	* nptl/pthread_create.c (START_THREAD_DEFN): Remove
	CALL_THREAD_FCT macro usage.
	* sysdeps/i386/nptl/tls.h (CALL_THREAD_FCT): Remove definition.
	* sysdeps/x86_64/nptl/tls.h (CALL_THREAD_FCT): Likewise.
	* sysdeps/x86_64/32/nptl/tls.h: Remove file.
 2017-04-04 18:03:35 -03:00
Adhemerval Zanella
3abeeec5f4 Fix i686 memchr overflow calculation (BZ#21182) 
This patch fixes the regression added by 23d2770 for final address
overflow calculation.  The subtraction of the considered size (16)
at line 120 is at wrong place, for sizes less than 16 subsequent
overflow check will not take in consideration an invalid size (since
the subtraction will be negative).  Also, the lea instruction also
does not raise the carry flag (CF) that is used in subsequent jbe
to check for overflow.

The fix is to follow x86_64 logic from 3daef2c where the overflow
is first check and a sub instruction is issued.  In case of resulting
negative size, CF will be set by the sub instruction and a NULL
result will be returned.  The patch also add similar tests reported
in bug report.

Checked on i686-linux-gnu and x86_64-linux-gnu.

	* string/test-memchr.c (do_test): Add BZ#21182 checks for address
	near end of a page.
	* sysdeps/i386/i686/multiarch/memchr-sse2.S (__memchr): Fix
	overflow calculation.
 2017-03-29 09:54:14 -03:00
Andreas Schwab
605c5ef4fb Remove _dl_platform_string 
There are no non-trivial uses of _dl_platform_string.
 2017-03-14 17:18:52 +01:00
Zack Weinberg
9090848d06 Narrowing the visibility of libc-internal.h even further. 
posix/wordexp-test.c used libc-internal.h for PTR_ALIGN_DOWN; similar
to what was done with libc-diag.h, I have split the definitions of
cast_to_integer, ALIGN_UP, ALIGN_DOWN, PTR_ALIGN_UP, and PTR_ALIGN_DOWN
to a new header, libc-pointer-arith.h.

It then occurred to me that the remaining declarations in libc-internal.h
are mostly to do with early initialization, and probably most of the
files including it, even in the core code, don't need it anymore.  Indeed,
only 19 files actually need what remains of libc-internal.h.  23 others
need libc-diag.h instead, and 12 need libc-pointer-arith.h instead.
No file needs more than one of them, and 16 don't need any of them!

So, with this patch, libc-internal.h stops including libc-diag.h as
well as losing the pointer arithmetic macros, and all including files
are adjusted.

        * include/libc-pointer-arith.h: New file.  Define
	cast_to_integer, ALIGN_UP, ALIGN_DOWN, PTR_ALIGN_UP, and
        PTR_ALIGN_DOWN here.
        * include/libc-internal.h: Definitions of above macros
	moved from here.  Don't include libc-diag.h anymore either.
	* posix/wordexp-test.c: Include stdint.h and libc-pointer-arith.h.
        Don't include libc-internal.h.

	* debug/pcprofile.c, elf/dl-tunables.c, elf/soinit.c, io/openat.c
	* io/openat64.c, misc/ptrace.c, nptl/pthread_clock_gettime.c
	* nptl/pthread_clock_settime.c, nptl/pthread_cond_common.c
	* string/strcoll_l.c, sysdeps/nacl/brk.c
	* sysdeps/unix/clock_settime.c
	* sysdeps/unix/sysv/linux/i386/get_clockfreq.c
	* sysdeps/unix/sysv/linux/ia64/get_clockfreq.c
	* sysdeps/unix/sysv/linux/powerpc/get_clockfreq.c
	* sysdeps/unix/sysv/linux/sparc/sparc64/get_clockfreq.c:
	Don't include libc-internal.h.

	* elf/get-dynamic-info.h, iconv/loop.c
	* iconvdata/iso-2022-cn-ext.c, locale/weight.h, locale/weightwc.h
	* misc/reboot.c, nis/nis_table.c, nptl_db/thread_dbP.h
	* nscd/connections.c, resolv/res_send.c, soft-fp/fmadf4.c
	* soft-fp/fmasf4.c, soft-fp/fmatf4.c, stdio-common/vfscanf.c
	* sysdeps/ieee754/dbl-64/e_lgamma_r.c
	* sysdeps/ieee754/dbl-64/k_rem_pio2.c
	* sysdeps/ieee754/flt-32/e_lgammaf_r.c
	* sysdeps/ieee754/flt-32/k_rem_pio2f.c
	* sysdeps/ieee754/ldbl-128/k_tanl.c
	* sysdeps/ieee754/ldbl-128ibm/k_tanl.c
	* sysdeps/ieee754/ldbl-96/e_lgammal_r.c
	* sysdeps/ieee754/ldbl-96/k_tanl.c, sysdeps/nptl/futex-internal.h:
	Include libc-diag.h instead of libc-internal.h.

        * elf/dl-load.c, elf/dl-reloc.c, locale/programs/locarchive.c
        * nptl/nptl-init.c, string/strcspn.c, string/strspn.c
	* malloc/malloc.c, sysdeps/i386/nptl/tls.h
	* sysdeps/nacl/dl-map-segments.h, sysdeps/x86_64/atomic-machine.h
	* sysdeps/unix/sysv/linux/spawni.c
        * sysdeps/x86_64/nptl/tls.h:
        Include libc-pointer-arith.h instead of libc-internal.h.

	* elf/get-dynamic-info.h, sysdeps/nacl/dl-map-segments.h
	* sysdeps/x86_64/atomic-machine.h:
        Add multiple include guard.
 2017-03-01 20:33:46 -05:00
Joseph Myers
2c51dfd05d Move tests of catan, catanh to auto-libm-test-*. 
This patch moves tests of catan and catanh with finite inputs (other
than the divide-by-zero cases producing an exact infinity) to using
the auto-libm-test machinery.  Each of auto-libm-test-out-catan and
auto-libm-test-out-catanh takes about three seconds to generate on my
system (so in fact it wasn't necessary after all to defer the move to
auto-libm-test-* until the output files were split up by function).

Tested for x86_64 and x86 and ulps updated accordingly.

	* math/auto-libm-test-in: Add tests of catan and catanh.
	* math/auto-libm-test-out-catan: New generated file.
	* math/auto-libm-test-out-catanh: Likewise.
	* math/libm-test-catan.inc (catan_test_data): Use AUTO_TESTS_c_c.
	Move tests with finite inputs, except divide-by-zero cases, to
	auto-libm-test-in.
	* math/libm-test-catanh.inc (catanh_test_data): Likewise.
	* math/Makefile (libm-test-funcs-auto): Add catan and catanh.
	(libm-test-funcs-noauto): Remove catan and catanh.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2017-02-17 18:42:37 +00:00
Joseph Myers
fa2a3dd7a3 Move tests of casin, casinh to auto-libm-test-*. 
This patch moves tests of casin and casinh with finite inputs to using
the auto-libm-test machinery.  Each of auto-libm-test-out-casin and
auto-libm-test-out-casinh takes about 38 minutes to generate on my
system because of MPC slowness on special cases that appear in the
tests (with MPC 1.0.3; I don't know to what extent current MPC master
might speed it up).

Tested for x86_64 and x86 and ulps updated accordingly.

	* math/auto-libm-test-in: Add tests of casin and casinh.
	* math/auto-libm-test-out-casin: New generated file.
	* math/auto-libm-test-out-casinh: Likewise.
	* math/libm-test-casin.inc (casin_test_data): Use AUTO_TESTS_c_c.
	Move tests with finite inputs to auto-libm-test-in.
	* math/libm-test-casinh.inc (casinh_test_data): Likewise.
	* math/Makefile (libm-test-funcs-auto): Add casin and casinh.
	(libm-test-funcs-noauto): Remove casin and casinh.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2017-02-17 18:14:02 +00:00
Joseph Myers
6b8303a383 Move tests of cacos, cacosh to auto-libm-test-*. 
This patch moves tests of cacos and cacosh with finite inputs to using
the auto-libm-test machinery.  Each of auto-libm-test-out-cacos and
auto-libm-test-out-cacosh takes about 80 minutes to generate on my
system because of MPC slowness on special cases that appear in the
tests (with MPC 1.0.3; I don't know to what extent current MPC master
might speed it up).

Tested for x86_64 and x86 and ulps updated accordingly.

	* math/auto-libm-test-in: Add tests of cacos and cacosh.
	* math/auto-libm-test-out-cacos: New generated file.
	* math/auto-libm-test-out-cacosh: Likewise.
	* math/libm-test-cacos.inc (cacos_test_data): Use AUTO_TESTS_c_c.
	Move tests with finite inputs to auto-libm-test-in.
	* math/libm-test-cacosh.inc (cacosh_test_data): Likewise.
	* math/Makefile (libm-test-funcs-auto): Add cacos and cacosh.
	(libm-test-funcs-noauto): Remove cacos and cacosh.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2017-02-17 17:44:23 +00:00
Adhemerval Zanella
37f8abad1c nptl: Remove COLORING_INCREMENT 
This patch removes the COLORING_INCREMENT define and usage on allocatestack.c.
It has not been used since 564cd8b67e (glibc-2.3.3) by any architecture.
The idea is to simplify the code by removing obsolete code.

	* nptl/allocatestack.c [COLORING_INCREMENT] (nptl_ncreated): Remove.
	(allocate_stack): Remove COLORING_INCREMENT usage.
	* nptl/stack-aliasing.h (COLORING_INCREMENT). Likewise.
	* sysdeps/i386/i686/stack-aliasing.h (COLORING_INCREMENT): Likewise.
 2017-02-06 15:58:32 -02:00
Adhemerval Zanella
f2d7f23a30 Remove i686, x86_64, and powerpc strtok implementations 
Based on comments on previous attempt to address BZ#16640 [1],
the idea is not support invalid use of strtok (the original
bug report proposal).  This leader to a new strtok optimized
strtok implementation [2].

The idea of this patch is to fix BZ#16640 to align all the
implementations to a same contract.  However, with newer strtok
code it is better to get remove the old assembly ones instead of
fix them.

For x86 is a gain in all cases since the new implementation can
potentially use sse2/sse42 implementation for strspn and strcspn.
This shows a better performance on both i686 and x86_64 using
the string benchtests.

On powerpc64 the gains are mixed, where only for larger inputs
or keys some gains are showns (based on benchtest it seems that
it shows some gains for keys larger than 10 and inputs larger
than 32).  I would prefer to remove the optimized implementation
based on first code simplicity and second because some more gain
could be optimized using a better optimized strcspn/strspn
code (as for x86).  However if powerpc arch maintainers prefer I
can send a v2 with the assembly code adjusted instead.

Checked on x86_64-linux-gnu, i686-linux-gnu, and powerpc64le-linux-gnu.

	[BZ #16640]
	* sysdeps/i386/i686/strtok.S: Remove file.
	* sysdeps/i386/i686/strtok_r.S: Likewise.
	* sysdeps/i386/strtok.S: Likewise.
	* sysdeps/i386/strtok_r.S: Likewise.
	* sysdeps/powerpc/powerpc64/strtok.S: Likewise.
	* sysdeps/powerpc/powerpc64/strtok_r.S: Likewise.
	* sysdeps/x86_64/strtok.S: Likewise.
	* sysdeps/x86_64/strtok_r.S: Likewise.

[1] https://sourceware.org/ml/libc-alpha/2016-10/msg00411.html
[2] https://sourceware.org/ml/libc-alpha/2016-12/msg00461.html
 2017-02-06 10:24:17 -02:00
H.J. Lu
6fab532b47 Allow IFUNC relocation against unrelocated shared library 
IFUNC relocation against definition in unrelocated shared library
will lead to segfault when the IFUNC function is called.  This
patch allows such IFUNC relocations with a warning.  This isn't
a real fix for

https://sourceware.org/bugzilla/show_bug.cgi?id=21041

It simply allows the program to load.  The program will segfault
when longjmp is called.

	* sysdeps/i386/dl-machine.h (elf_machine_rel): Replace
	_dl_fatal_printf with _dl_error_printf for IFUNC relocation
	against unrelocated shared library.
	* sysdeps/x86_64/dl-machine.h (elf_machine_rela): Likewise.
 2017-02-02 13:14:59 -08:00
Gabriel F. T. Gomes
f67d78192c Move wrappers to libm-compat-calls-auto 
This commit moves one step towards the deprecation of wrappers that
use _LIB_VERSION / matherr / __kernel_standard functionality, by
adding the suffix '_compat' to their filenames and adjusting Makefiles
and #includes accordingly.

New template wrappers that do not use such functionality will be added
by future patches and will be first used by the float128 wrappers.
 2017-01-04 16:25:04 -02:00
Joseph Myers
785fcbaef3 Update i386 libm-test-ulps. 
When testing changes to i386 libm functions (that are shadowed for
i686 builds by i686 versions) recently, I saw that the plain i386
libm-test-ulps (as opposed to the i686 multiarch version) needed
updating for tests that had been added since it was last updated.
This patch updates it accordingly.

	* sysdeps/i386/fpu/libm-test-ulps: Update.
 2017-01-03 21:05:46 +00:00
Adhemerval Zanella
8dad72997a Fix x86 strncat optimized implementation for large sizes 
Similar to BZ#19387, BZ#21014, and BZ#20971, both x86 sse2 strncat
optimized assembly implementations do not handle the size overflow
correctly.

The x86_64 one is in fact an issue with strcpy-sse2-unaligned, but
that is triggered also with strncat optimized implementation.

This patch uses a similar strategy used on 3daef2c8ee, where
saturared math is used for overflow case.

Checked on x86_64-linux-gnu and i686-linux-gnu.  It fixes BZ #19390.

	[BZ #19390]
	* string/test-strncat.c (test_main): Add tests with SIZE_MAX as
	maximum string size.
	* sysdeps/i386/i686/multiarch/strcat-sse2.S (STRCAT): Avoid overflow
	in pointer addition.
	* sysdeps/x86_64/multiarch/strcpy-sse2-unaligned.S (STRCPY):
	Likewise.
 2017-01-03 14:24:53 -02:00
Adhemerval Zanella
23d27709a4 Fix i686 memchr for large input sizes 
Similar to BZ#19387 and BZ#20971, both i686 memchr optimized assembly
implementations (memchr-sse2-bsf and memchr-sse2) do not handle the
size overflow correctly.

It is shown by the new tests added by commit 3daef2c8ee, where
both implementation fails with size as SIZE_MAX.

This patch uses a similar strategy used on 3daef2c8ee, where
saturared math is used for overflow case.

Checked on i686-linux-gnu.

	[BZ #21014]
	* sysdeps/i386/i686/multiarch/memchr-sse2-bsf.S (MEMCHR): Avoid overflow
	in pointer addition.
	* sysdeps/i386/i686/multiarch/memchr-sse2.S (MEMCHR): Likewise.
 2017-01-02 17:52:51 -02:00
Joseph Myers
bfff8b1bec Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Dmitry V. Levin
12f1ae05c0 Fix typos in the spelling of "implementation" 
Apply the following spelling fix:
$ git grep -El 'implemetn?ation' |
  xargs sed -ri 's/implemetn?ation/implementation/g'

[BZ #19514]
* resolv/res_send.c: Fix typo in comment.
* sysdeps/i386/i386-mcount.S: Likewise.
* sysdeps/s390/s390-32/s390-mcount.S: Likewise.
* sysdeps/s390/s390-64/s390x-mcount.S: Likewise.
* sysdeps/sparc/sparc-mcount.S: Likewise.
 2016-12-27 20:13:35 +00:00
Nick Alcock
995635f95b Compile the dynamic linker without stack protection [BZ #7065] 
Also compile corresponding routines in the static libc.a with the same
flag.
 2016-12-26 10:08:48 +01:00
Joseph Myers
0a2546cdaa Fix x86, x86_64 fmax, fmin sNaN handling, add tests (bug 20947). 
Various fmax and fmin function implementations mishandle sNaN
arguments:

(a) When both arguments are NaNs, the return value should be a qNaN,
but sometimes it is an sNaN if at least one argument is an sNaN.

(b) Under TS 18661-1 semantics, if either argument is an sNaN then the
result should be a qNaN (whereas if one argument is a qNaN and the
other is not a NaN, the result should be the non-NaN argument).
Various implementations treat sNaNs like qNaNs here.

This patch fixes the x86 and x86_64 versions (ignoring float and
double for 32-bit x86 given the inability to reliably avoid the sNaN
turning into a qNaN before it gets to the called function).  Tests of
sNaN inputs to these functions are added.

Note on architecture versions I haven't changed for this issue:
AArch64 already gets this right (it uses a hardware instruction with
the correct semantics for both quiet and signaling NaNs) and does not
need changes.  It's possible Alpha, IA64, SPARC might need changes
(this would be shown by the testsuite if so).

Tested for x86_64 and x86 (both i686 and i586 builds, to cover the
different x86 implementations).

	[BZ #20947]
	* sysdeps/i386/fpu/s_fmaxl.S (__fmaxl): Add the arguments when
	either is a signaling NaN.
	* sysdeps/i386/fpu/s_fminl.S (__fminl): Likewise.  Make code
	follow fmaxl more closely.
	* sysdeps/i386/i686/fpu/s_fmaxl.S (__fmaxl): Add the arguments
	when either is a signaling NaN.
	* sysdeps/i386/i686/fpu/s_fminl.S (__fminl): Likewise.
	* sysdeps/x86_64/fpu/s_fmax.S (__fmax): Likewise.
	* sysdeps/x86_64/fpu/s_fmaxf.S (__fmaxf): Likewise.
	* sysdeps/x86_64/fpu/s_fmaxl.S (__fmaxl): Likewise.
	* sysdeps/x86_64/fpu/s_fmin.S (__fmin): Likewise.
	* sysdeps/x86_64/fpu/s_fminf.S (__fminf): Likewise.
	* sysdeps/x86_64/fpu/s_fminl.S (__fminl): Likewise.
	* math/libm-test.inc (fmax_test_data): Add tests of sNaN inputs.
	(fmin_test_data): Likewise.
 2016-12-15 23:52:18 +00:00
Joseph Myers
a91fd168a0 Fix x86_64/x86 powl handling of sNaN arguments (bug 20916). 
The x86_64/x86 powl implementations mishandle sNaN arguments, both by
returning sNaN in some cases (instead of doing arithmetic on the
arguments to produce the result when NaN arguments result in NaN
results) and by treating sNaN the same as qNaN for arguments (1, sNaN)
and (sNaN, 0), contrary to TS 18661-1 which requires those cases to
return qNaN instead of 1.

This patch makes the x86_64/x86 powl implementations follow TS 18661-1
semantics for sNaN arguments; sNaN tests are also added for pow.
Given the problems with testing float and double sNaN arguments on
32-bit x86 (sNaN tests disabled because the compiler may convert
unnecessarily to a qNaN when passing arguments), no changes are made
to the powf and pow implementations there.

Tested for x86_64 and x86.

	[BZ #20916]
	* sysdeps/i386/fpu/e_powl.S (__ieee754_powl): Do not return 1 for
	arguments (sNaN, 0) or (1, sNaN).  Do arithmetic on NaN arguments
	to compute result.
	* sysdeps/x86_64/fpu/e_powl.S (__ieee754_powl): Likewise.
	* math/libm-test.inc (pow_test_data): Add tests of sNaN arguments.
 2016-12-06 00:33:19 +00:00
Adhemerval Zanella
c579f48edb Remove cached PID/TID in clone 
This patch remove the PID cache and usage in current GLIBC code.  Current
usage is mainly used a performance optimization to avoid the syscall,
however it adds some issues:

  - The exposed clone syscall will try to set pid/tid to make the new
    thread somewhat compatible with current GLIBC assumptions.  This cause
    a set of issue with new workloads and usecases (such as BZ#17214 and
    [1]) as well for new internal usage of clone to optimize other algorithms
    (such as clone plus CLONE_VM for posix_spawn, BZ#19957).

  - The caching complexity also added some bugs in the past [2] [3] and
    requires more effort of each port to handle such requirements (for
    both clone and vfork implementation).

  - Caching performance gain in mainly on getpid and some specific
    code paths.  The getpid performance leverage is questionable [4],
    either by the idea of getpid being a hotspot as for the getpid
    implementation itself (if it is indeed a justifiable hotspot a
    vDSO symbol could let to a much more simpler solution).

    Other usage is mainly for non usual code paths, such as pthread
    cancellation signal and handling.

For thread creation (on stack allocation) the code simplification in fact
adds some performance gain due the no need of transverse the stack cache
and invalidate each element pid.

Other thread usages will require a direct getpid syscall, such as
cancellation/setxid signal, thread cancellation, thread fail path (at
create_thread), and thread signal (pthread_kill and pthread_sigqueue).
However these are hardly usual hotspots and I think adding a syscall is
justifiable.

It also simplifies both the clone and vfork arch-specific implementation.
And by review each fork implementation there are some discrepancies that
this patch also solves:

  - microblaze clone/vfork does not set/reset the pid/tid field
  - hppa uses the default vfork implementation that fallback to fork.
    Since vfork is deprecated I do not think we should bother with it.

The patch also removes the TID caching in clone. My understanding for
such semantic is try provide some pthread usage after a user program
issue clone directly (as done by thread creation with CLONE_PARENT_SETTID
and pthread tid member).  However, as stated before in multiple discussions
threads, GLIBC provides clone syscalls without further supporting all this
semantics.

I ran a full make check on x86_64, x32, i686, armhf, aarch64, and powerpc64le.
For sparc32, sparc64, and mips I ran the basic fork and vfork tests from
posix/ folder (on a qemu system).  So it would require further testing
on alpha, hppa, ia64, m68k, nios2, s390, sh, and tile (I excluded microblaze
because it is already implementing the patch semantic regarding clone/vfork).

[1] https://codereview.chromium.org/800183004/
[2] https://sourceware.org/ml/libc-alpha/2006-07/msg00123.html
[3] https://sourceware.org/bugzilla/show_bug.cgi?id=15368
[4] http://yarchive.net/comp/linux/getpid_caching.html

	* sysdeps/nptl/fork.c (__libc_fork): Remove pid cache setting.
	* nptl/allocatestack.c (allocate_stack): Likewise.
	(__reclaim_stacks): Likewise.
	(setxid_signal_thread): Obtain pid through syscall.
	* nptl/nptl-init.c (sigcancel_handler): Likewise.
	(sighandle_setxid): Likewise.
	* nptl/pthread_cancel.c (pthread_cancel): Likewise.
	* sysdeps/unix/sysv/linux/pthread_kill.c (__pthread_kill): Likewise.
	* sysdeps/unix/sysv/linux/pthread_sigqueue.c (pthread_sigqueue):
	Likewise.
	* sysdeps/unix/sysv/linux/createthread.c (create_thread): Likewise.
	* sysdeps/unix/sysv/linux/getpid.c: Remove file.
	* nptl/descr.h (struct pthread): Change comment about pid value.
	* nptl/pthread_getattr_np.c (pthread_getattr_np): Remove thread
	pid assert.
	* sysdeps/unix/sysv/linux/pthread-pids.h (__pthread_initialize_pids):
	Do not set pid value.
	* nptl_db/td_ta_thr_iter.c (iterate_thread_list): Remove thread
	pid cache check.
	* nptl_db/td_thr_validate.c (td_thr_validate): Likewise.
	* sysdeps/aarch64/nptl/tcb-offsets.sym: Remove pid offset.
	* sysdeps/alpha/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/arm/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/hppa/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/i386/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/ia64/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/m68k/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/microblaze/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/mips/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/nios2/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/powerpc/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/s390/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/sh/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/sparc/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/tile/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/x86_64/nptl/tcb-offsets.sym: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/clone.S: Remove pid and tid caching.
	* sysdeps/unix/sysv/linux/alpha/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/arm/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/hppa/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/ia64/clone2.S: Likewise.
	* sysdeps/unix/sysv/linux/mips/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/nios2/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/sh/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/tile/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/aarch64/vfork.S: Remove pid set and reset.
	* sysdeps/unix/sysv/linux/alpha/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/arm/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/ia64/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/m68k/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/m68k/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/mips/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/nios2/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/sh/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/tile/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/vfork.S: Likewise.
	* sysdeps/unix/sysv/linux/tst-clone2.c (f): Remove direct pthread
	struct access.
	(clone_test): Remove function.
	(do_test): Rewrite to take in consideration pid is not cached anymore.
 2016-11-24 19:38:51 -02:00
Joseph Myers
799131036e Do not hardcode platform names in manual/libm-err-tab.pl (bug 14139). 
manual/libm-err-tab.pl hardcodes a list of names for particular
platforms (mapping from sysdeps directory name to friendly name for
the manual).  This goes against the principle of keeping information
about individual platforms in their corresponding sysdeps directory,
and the list is also very out-of-date regarding supported platforms
and their corresponding sysdeps directories.

This patch fixes this by adding a libm-test-ulps-name file alongside
each libm-test-ulps file.  The script then gets the friendly name from
that file, which is required to exist, so it no longer needs to allow
for the mapping being missing.

Tested for x86_64.

	[BZ #14139]
	* manual/libm-err-tab.pl (%pplatforms): Initialize to empty.
	(find_files): Obtain platform name from libm-test-ulps-name and
	store in %pplatforms.
	(canonicalize_platform): Remove.
	(print_platforms): Use $pplatforms directly.
	(by_platforms): Do not allow for platforms missing from
	%pplatforms.
	* sysdeps/aarch64/libm-test-ulps-name: New file.
	* sysdeps/alpha/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/arm/libm-test-ulps-name: Likewise.
	* sysdeps/generic/libm-test-ulps-name: Likewise.
	* sysdeps/hppa/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/i386/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps-name: Likewise.
	* sysdeps/ia64/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/m68k/coldfire/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/m68k/m680x0/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/microblaze/libm-test-ulps-name: Likewise.
	* sysdeps/mips/mips32/libm-test-ulps-name: Likewise.
	* sysdeps/mips/mips64/libm-test-ulps-name: Likewise.
	* sysdeps/nios2/libm-test-ulps-name: Likewise.
	* sysdeps/powerpc/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/powerpc/nofpu/libm-test-ulps-name: Likewise.
	* sysdeps/s390/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/sh/libm-test-ulps-name: Likewise.
	* sysdeps/sparc/fpu/libm-test-ulps-name: Likewise.
	* sysdeps/tile/libm-test-ulps-name: Likewise.
	* sysdeps/x86_64/fpu/libm-test-ulps-name: Likewise.
 2016-11-04 16:49:06 +00:00
H.J. Lu
0e6d3adc60 Check IFUNC definition in unrelocated shared library [BZ #20019] 
Calling an IFUNC function defined in unrelocated shared library may
lead to segfault.  This patch issues an error message to request
relinking the shared library if it references IFUNC function defined
in the unrelocated shared library.

	[BZ #20019]
	* sysdeps/i386/dl-machine.h (elf_machine_rel): Check IFUNC
	definition in unrelocated shared library.
	* sysdeps/x86_64/dl-machine.h (elf_machine_rela): Likewise.
 2016-10-28 09:12:15 -07:00
Zack Weinberg
c66b29f9cc Installed-header hygiene (BZ#20366): stack_t. 
sys/ucontext.h unconditionally uses stack_t, and it does not make
sense to change that.  But signal.h only declares stack_t under
__USE_XOPEN_EXTENDED || __USE_XOPEN2K8.  The actual definition is
already in a bits header, bits/sigstack.h, but that header insists on
only being included by signal.h, so we have to change that as well as
all of the sys/ucontext.h variants.  (Some but not all variants of
bits/sigcontext.h, which sys/ucontext.h may also need, had already
received this adjustment; for consistency, I made them all the same,
even if that's not strictly necessary in some configurations.)
bits/sigcontext.h and bits/sigstack.h also all need to receive
multiple inclusion guards.

	* sysdeps/generic/sys/ucontext.h
	* sysdeps/arm/sys/ucontext.h
	* sysdeps/i386/sys/ucontext.h
	* sysdeps/m68k/sys/ucontext.h
	* sysdeps/mips/sys/ucontext.h
	* sysdeps/unix/sysv/linux/aarch64/sys/ucontext.h
	* sysdeps/unix/sysv/linux/alpha/sys/ucontext.h
	* sysdeps/unix/sysv/linux/arm/sys/ucontext.h
	* sysdeps/unix/sysv/linux/hppa/sys/ucontext.h
	* sysdeps/unix/sysv/linux/ia64/sys/ucontext.h
	* sysdeps/unix/sysv/linux/m68k/sys/ucontext.h
	* sysdeps/unix/sysv/linux/mips/sys/ucontext.h
	* sysdeps/unix/sysv/linux/nios2/sys/ucontext.h
	* sysdeps/unix/sysv/linux/powerpc/sys/ucontext.h
	* sysdeps/unix/sysv/linux/s390/sys/ucontext.h
	* sysdeps/unix/sysv/linux/sh/sys/ucontext.h
	* sysdeps/unix/sysv/linux/sparc/sys/ucontext.h
	* sysdeps/unix/sysv/linux/tile/sys/ucontext.h
	* sysdeps/unix/sysv/linux/x86/sys/ucontext.h:
	Include both bits/sigcontext.h and bits/sigstack.h.
	Fix grammar error in comment, if present.

	* bits/sigstack.h
	* sysdeps/unix/sysv/linux/aarch64/bits/sigstack.h
	* sysdeps/unix/sysv/linux/alpha/bits/sigstack.h
	* sysdeps/unix/sysv/linux/bits/sigstack.h
	* sysdeps/unix/sysv/linux/ia64/bits/sigstack.h
	* sysdeps/unix/sysv/linux/mips/bits/sigstack.h
	* sysdeps/unix/sysv/linux/powerpc/bits/sigstack.h
	* sysdeps/unix/sysv/linux/sparc/bits/sigstack.h
	* bits/sigcontext.h
	* sysdeps/mach/hurd/i386/bits/sigcontext.h
	* sysdeps/unix/sysv/linux/bits/sigcontext.h
	* sysdeps/unix/sysv/linux/ia64/bits/sigcontext.h
	* sysdeps/unix/sysv/linux/sparc/bits/sigcontext.h:
	Add multiple inclusion guard.  Permit inclusion by sys/ucontext.h
	as well as signal.h, if this was not already allowed.  Request
	definition of size_t if necessary.  Minimize semantically-null
	differences across files.
 2016-09-23 08:43:56 -04:00
Florian Weimer
8837917cf1 Remove remnants of .og patterns 
This was used by --enable-omitfp, and the bulk of it was removed in this
commit:

commit bdeba1354b
Author: Ulrich Drepper <drepper@gmail.com>
Date:   Sat Jan 7 11:29:31 2012 -0500

    Remove --enable-omitfp support
 2016-09-20 12:18:13 +02:00
Joseph Myers
ec94343f59 Add femode_t functions. 
TS 18661-1 defines a type femode_t to represent the set of dynamic
floating-point control modes (such as the rounding mode and trap
enablement modes), and functions fegetmode and fesetmode to manipulate
those modes (without affecting other state such as the raised
exception flags) and a corresponding macro FE_DFL_MODE.

This patch series implements those interfaces for glibc.  This first
patch adds the architecture-independent pieces, the x86 and x86_64
implementations, and the <bits/fenv.h> and ABI baseline updates for
all architectures so glibc keeps building and passing the ABI tests on
all architectures.  Subsequent patches add the fegetmode and fesetmode
implementations for other architectures.

femode_t is generally an integer type - the same type as fenv_t, or as
the single element of fenv_t where fenv_t is a structure containing a
single integer (or the single relevant element, where it has elements
for both status and control registers) - except where architecture
properties or consistency with the fenv_t implementation indicate
otherwise.  FE_DFL_MODE follows FE_DFL_ENV in whether it's a magic
pointer value (-1 cast to const femode_t *), a value that can be
distinguished from valid pointers by its high bits but otherwise
contains a representation of the desired register contents, or a
pointer to a constant variable (the powerpc case; __fe_dfl_mode is
added as an exported constant object, an alias to __fe_dfl_env).

Note that where architectures (that share a register between control
and status bits) gain definitions of new floating-point control or
status bits in future, the implementations of fesetmode for those
architectures may need updating (depending on whether the new bits are
control or status bits and what the implementation does with
previously unknown bits), just like existing implementations of
<fenv.h> functions that take care not to touch reserved bits may need
updating when the set of reserved bits changes.  (As any new bits are
outside the scope of ISO C, that's just a quality-of-implementation
issue for supporting them, not a conformance issue.)

As with fenv_t, femode_t should properly include any software DFP
rounding mode (and for both fenv_t and femode_t I'd consider that
fragment of DFP support appropriate for inclusion in glibc even in the
absence of the rest of libdfp; hardware DFP rounding modes should
already be included if the definitions of which bits are status /
control bits are correct).

Tested for x86_64, x86, mips64 (hard float, and soft float to test the
fallback version), arm (hard float) and powerpc (hard float, soft
float and e500).  Other architecture versions are untested.

	* math/fegetmode.c: New file.
	* math/fesetmode.c: Likewise.
	* sysdeps/i386/fpu/fegetmode.c: Likewise.
	* sysdeps/i386/fpu/fesetmode.c: Likewise.
	* sysdeps/x86_64/fpu/fegetmode.c: Likewise.
	* sysdeps/x86_64/fpu/fesetmode.c: Likewise.
	* math/fenv.h: Update comment on inclusion of <bits/fenv.h>.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (fegetmode): New function
	declaration.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (fesetmode): Likewise.
	* bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (femode_t): New
	typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/aarch64/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/alpha/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/arm/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/hppa/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/ia64/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/m68k/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/microblaze/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/mips/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/nios2/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/powerpc/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (__fe_dfl_mode): New variable
	declaration.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/s390/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/sh/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/sparc/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/tile/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* sysdeps/x86/fpu/bits/fenv.h [__GLIBC_USE (IEC_60559_BFP_EXT)]
	(femode_t): New typedef.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FE_DFL_MODE): New macro.
	* manual/arith.texi (FE_DFL_MODE): Document macro.
	(fegetmode): Document function.
	(fesetmode): Likewise.
	* math/Versions (fegetmode): New libm symbol at version
	GLIBC_2.25.
	(fesetmode): Likewise.
	* math/Makefile (libm-support): Add fegetmode and fesetmode.
	(tests): Add test-femode and test-femode-traps.
	* math/test-femode-traps.c: New file.
	* math/test-femode.c: Likewise.
	* sysdeps/powerpc/fpu/fenv_const.c (__fe_dfl_mode): Declare as
	alias for __fe_dfl_env.
	* sysdeps/powerpc/nofpu/fenv_const.c (__fe_dfl_mode): Likewise.
	* sysdeps/powerpc/powerpc32/e500/nofpu/fenv_const.c
	(__fe_dfl_mode): Likewise.
	* sysdeps/powerpc/Versions (__fe_dfl_mode): New libm symbol at
	version GLIBC_2.25.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
 2016-09-07 16:40:09 +00:00
Paul E. Murphy
2bad840e9d Remove unneeded stubs for k_rem_pio2l. 
This is only used for the float and double variants.

Instead, just add it to the type specific list of files,
and remove all stubs, and remove the declaration from
math_private.h.

I verified x86_64, i486, ia64, m68k, and ppc64 build.
 2016-09-01 09:31:06 -05:00
Joseph Myers
5146356f5a Add fesetexcept. 
TS 18661-1 defines an fesetexcept function for setting floating-point
exception flags without the side-effect of causing enabled traps to be
taken.

This patch series implements this function for glibc.  The present
patch adds the fallback stub implementation, x86 and x86_64
implementations, documentation, tests and ABI baseline updates.  The
remaining patches, some of them untested, add implementations for
other architectures.  The implementations generally follow those of
the fesetexceptflag function.

As for fesetexceptflag, the approach taken for architectures where
setting flags causes enabled traps to be taken is to set the flags
(and potentially cause traps) rather than refusing to set the flags
and returning an error.  Since ISO C and TS 18661 provide no way to
enable traps, this is formally in accordance with the standards.

The NEWS entry should be considered a placeholder, since this patch
series is intended to be followed by further such series adding other
TS 18661-1 features, so that the NEWS entry would end up looking more
like

* New <fenv.h> features from TS 18661-1:2014 are added to libm: the
  fesetexcept, fetestexceptflag, fegetmode and fesetmode functions,
  the femode_t type and the FE_DFL_MODE macro.

with hopefully more such entries for other features, rather than
having an entry for a single function in the end.

I believe we have consensus for adding TS 18661-1 interfaces as per
<https://sourceware.org/ml/libc-alpha/2016-06/msg00421.html>.

Tested for x86_64, x86, mips64 (hard float, and soft float to test the
fallback version), arm (hard float) and powerpc (hard float, soft
float and e500).

	* math/fesetexcept.c: New file.
	* sysdeps/i386/fpu/fesetexcept.c: Likewise.
	* sysdeps/x86_64/fpu/fesetexcept.c: Likewise.
	* math/fenv.h: Define
	__GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION and include
	<bits/libc-header-start.h> instead of including <features.h>.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (fesetexcept): New function
	declaration.
	* manual/arith.texi (fesetexcept): Document function.
	* math/Versions (fesetexcept): New libm symbol at version
	GLIBC_2.25.
	* math/Makefile (libm-support): Add fesetexcept.
	(tests): Add test-fesetexcept and test-fesetexcept-traps.
	* math/test-fesetexcept.c: New file.
	* math/test-fesetexcept-traps.c: Likewise.
	* sysdeps/nacl/libm.abilist: Update.
	* sysdeps/unix/sysv/linux/aarch64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/alpha/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/arm/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/hppa/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/i386/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/ia64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/nios2/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm-le.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sh/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libm.abilist:
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libm.abilist: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libm.abilist: Likewise.
 2016-08-16 16:16:10 +00:00
H.J. Lu
d957c4d3fa i386: Compile rtld-*.os with -mno-sse -mno-mmx -mfpmath=387 
Compile i386 rtld-*.os with -mno-sse -mno-mmx -mfpmath=387 so that no
code in ld.so uses mm/xmm/ymm/zmm registers on i386 since the first 3
mm/xmm/ymm/zmm registers are used to pass vector parameters which must
be preserved.

	* sysdeps/i386/Makefile (rtld-CFLAGS): New.
	[subdir == elf] (CFLAGS-.os): Replace -mno-sse -mno-mmx
	-mfpmath=387 with $(rtld-CFLAGS).
	[subdir != elf] (CFLAGS-.os): Compile rtld-*.os with
	$(rtld-CFLAGS).
 2016-07-18 15:16:24 -07:00
H.J. Lu
e15eaa8f33 Regenerate i686 libm-test-ulps with GCC 6.1 at -O3 [BZ #20347] 
This fixes with GCC 6.1 and -O3 on i686:

Failure: Test: j0_downward (0xap+0)
Result:
 is:         -2.45935813e-01  -0x1.f7ad32p-3
 should be:  -2.45935768e-01  -0x1.f7ad2cp-3
 difference:  4.47034835e-08   0x1.800000p-25
 ulp       :  3.0000
 max.ulp   :  2.0000
Maximal error of `j0_downward'
 is      : 3 ulp
 accepted: 2 ulp

	[BZ #20347]
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Regenerated.
 2016-07-13 08:02:10 -07:00
Aurelien Jarno
6a40d8df0c i686/multiarch: Regenerate ulps 
This comes from running “make regen-ulps” on AMD Opteron 6272 CPUs.

Changelog:
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Regenerated.
 2016-06-30 00:31:11 +02:00
Joseph Myers
30dcf959d2 Avoid "inexact" exceptions in i386/x86_64 trunc functions (bug 15479). 
As discussed in
<https://sourceware.org/ml/libc-alpha/2016-05/msg00577.html>, TS
18661-1 disallows ceil, floor, round and trunc functions from raising
the "inexact" exception, in accordance with general IEEE 754 semantics
for when that exception is raised.  Fixing this for x87 floating point
is more complicated than for the other versions of these functions,
because they use the frndint instruction that raises "inexact" and
this can only be avoided by saving and restoring the whole
floating-point environment.

As I noted in
<https://sourceware.org/ml/libc-alpha/2016-06/msg00128.html>, I have
now implemented a GCC option -fno-fp-int-builtin-inexact for GCC 7,
such that GCC will inline these functions on x86, without caring about
"inexact", when the default -ffp-int-builtin-inexact is in effect.
This allows users to get optimized code depending on the options they
pass to the compiler, while making the out-of-line functions follow TS
18661-1 semantics and avoid "inexact".

This patch duly fixes the out-of-line trunc function implementations
to avoid "inexact", in the same way as the nearbyint implementations.

I do not know how the performance of implementations such as these
based on saving the environment and changing the rounding mode
temporarily compares to that of the C versions or SSE 4.1 versions (of
course, for 32-bit x86 SSE implementations still need to get the
return value in an x87 register); it's entirely possible other
implementations could be faster in some cases.

Tested for x86_64 and x86.

	[BZ #15479]
	* sysdeps/i386/fpu/s_trunc.S (__trunc): Save and restore
	floating-point environment rather than just control word.
	* sysdeps/i386/fpu/s_truncf.S (__truncf): Likewise.
	* sysdeps/i386/fpu/s_truncl.S (__truncl): Save and restore
	floating-point environment, with "invalid" exceptions merged in,
	rather than just control word.
	* sysdeps/x86_64/fpu/s_truncl.S (__truncl): Likewise.
	* math/libm-test.inc (trunc_test_data): Do not allow spurious
	"inexact" exceptions.
 2016-06-27 17:26:52 +00:00
Joseph Myers
623629de06 Avoid "inexact" exceptions in i386/x86_64 floor functions (bug 15479). 
As discussed in
<https://sourceware.org/ml/libc-alpha/2016-05/msg00577.html>, TS
18661-1 disallows ceil, floor, round and trunc functions from raising
the "inexact" exception, in accordance with general IEEE 754 semantics
for when that exception is raised.  Fixing this for x87 floating point
is more complicated than for the other versions of these functions,
because they use the frndint instruction that raises "inexact" and
this can only be avoided by saving and restoring the whole
floating-point environment.

As I noted in
<https://sourceware.org/ml/libc-alpha/2016-06/msg00128.html>, I have
now implemented a GCC option -fno-fp-int-builtin-inexact for GCC 7,
such that GCC will inline these functions on x86, without caring about
"inexact", when the default -ffp-int-builtin-inexact is in effect.
This allows users to get optimized code depending on the options they
pass to the compiler, while making the out-of-line functions follow TS
18661-1 semantics and avoid "inexact".

This patch duly fixes the out-of-line floor function implementations
to avoid "inexact", in the same way as the nearbyint implementations.

I do not know how the performance of implementations such as these
based on saving the environment and changing the rounding mode
temporarily compares to that of the C versions or SSE 4.1 versions (of
course, for 32-bit x86 SSE implementations still need to get the
return value in an x87 register); it's entirely possible other
implementations could be faster in some cases.

Tested for x86_64 and x86.

	[BZ #15479]
	* sysdeps/i386/fpu/s_floor.S (__floor): Save and restore
	floating-point environment rather than just control word.
	* sysdeps/i386/fpu/s_floorf.S (__floorf): Likewise.
	* sysdeps/i386/fpu/s_floorl.S (__floorl): Save and restore
	floating-point environment, with "invalid" exceptions merged in,
	rather than just control word.
	* sysdeps/x86_64/fpu/s_floorl.S (__floorl): Likewise.
	* math/libm-test.inc (floor_test_data): Do not allow spurious
	"inexact" exceptions.
 2016-06-27 17:25:47 +00:00
Joseph Myers
26b0bf9600 Avoid "inexact" exceptions in i386/x86_64 ceil functions (bug 15479). 
As discussed in
<https://sourceware.org/ml/libc-alpha/2016-05/msg00577.html>, TS
18661-1 disallows ceil, floor, round and trunc functions from raising
the "inexact" exception, in accordance with general IEEE 754 semantics
for when that exception is raised.  Fixing this for x87 floating point
is more complicated than for the other versions of these functions,
because they use the frndint instruction that raises "inexact" and
this can only be avoided by saving and restoring the whole
floating-point environment.

As I noted in
<https://sourceware.org/ml/libc-alpha/2016-06/msg00128.html>, I have
now implemented a GCC option -fno-fp-int-builtin-inexact for GCC 7,
such that GCC will inline these functions on x86, without caring about
"inexact", when the default -ffp-int-builtin-inexact is in effect.
This allows users to get optimized code depending on the options they
pass to the compiler, while making the out-of-line functions follow TS
18661-1 semantics and avoid "inexact".

This patch duly fixes the out-of-line ceil function implementations to
avoid "inexact", in the same way as the nearbyint implementations.

I do not know how the performance of implementations such as these
based on saving the environment and changing the rounding mode
temporarily compares to that of the C versions or SSE 4.1 versions (of
course, for 32-bit x86 SSE implementations still need to get the
return value in an x87 register); it's entirely possible other
implementations could be faster in some cases.

Tested for x86_64 and x86.

	[BZ #15479]
	* sysdeps/i386/fpu/s_ceil.S (__ceil): Save and restore
	floating-point environment rather than just control word.
	* sysdeps/i386/fpu/s_ceilf.S (__ceilf): Likewise.
	* sysdeps/i386/fpu/s_ceill.S (__ceill): Save and restore
	floating-point environment, with "invalid" exceptions merged in,
	rather than just control word.
	* sysdeps/x86_64/fpu/s_ceill.S (__ceill): Likewise.
	* math/libm-test.inc (ceil_test_data): Do not allow spurious
	"inexact" exceptions.
 2016-06-27 17:24:30 +00:00
Joseph Myers
40244be372 Fix i386/x86_64 scalbl with sNaN input (bug 20296). 
The x86_64 and i386 versions of scalbl return sNaN for some cases of
sNaN input and are missing "invalid" exceptions for other cases.  This
results from overly complicated code that either returns a NaN input,
or discards both inputs when one is NaN and loads a NaN from memory.
This patch fixes this by simplifying the code to add the arguments
when either one is NaN.

Tested for x86_64 and x86.

	[BZ #20296]
	* sysdeps/i386/fpu/e_scalbl.S (__ieee754_scalbl): Add arguments
	when either argument is a NaN.
	* sysdeps/x86_64/fpu/e_scalbl.S (__ieee754_scalbl): Likewise.
	* math/libm-test.inc (scalb_test_data): Add sNaN tests.
 2016-06-23 22:17:41 +00:00
Joseph Myers
4e9bf327ad Simplify x86 nearbyint functions. 
The i386 implementations of nearbyint functions, and x86_64
nearbyintl, contain code to mask the "inexact" exception.  However,
the fnstenv instruction has the effect of masking all exceptions, so
this masking code has been redundant since fnstenv was added to those
implementations (by commit 846d9a4a3acdb4939ca7bf6aed48f9f6f26911be;
commit 71d1b0166b added the test
math/test-nearbyint-except-2.c that verifies these functions do work
when called with "inexact" traps enabled); this patch removes the
redundant code.

Tested for x86_64 and x86.

	* sysdeps/i386/fpu/s_nearbyint.S (__nearbyint): Do not mask
	"inexact" exceptions after fnstenv.
	* sysdeps/i386/fpu/s_nearbyintf.S (__nearbyintf): Likewise.
	* sysdeps/i386/fpu/s_nearbyintl.S (__nearbyintl): Likewise.
	* sysdeps/x86_64/fpu/s_nearbyintl.S (__nearbyintl): Likewise.
 2016-06-22 15:40:30 +00:00
Florian Weimer
aca1daef29 elf: Consolidate machine-agnostic DTV definitions in <dl-dtv.h> 
Identical definitions of dtv_t and TLS_DTV_UNALLOCATED were
repeated for all architectures using DTVs.
 2016-06-20 14:31:40 +02:00
Joseph Myers
228a78c21b Fix i386 fdim double rounding (bug 20255). 
fdim suffers from double rounding on i386 because subtracting two
double values can produce an inexact long double value exactly half
way between two double values.  This patch fixes this by creating an
i386-specific version of fdim - C, based on the generic version,
unlike the previous .S version - which sets the x87 precision control
to double precision for the subtraction and then restores it
afterwards.  As noted in the comment added, there are no issues of
double rounding for subnormals (a case that setting precision control
does not address) because subtraction cannot produce an inexact result
in the subnormal range.

Tested for x86_64 and x86.

	[BZ #20255]
	* sysdeps/i386/fpu/s_fdim.c: New file.  Based on math/s_fdim.c.
	* math/libm-test.inc (fdim_test_data): Add another test.
 2016-06-14 16:41:50 +00:00
Joseph Myers
f4015c8a86 Use generic fdim on more architectures (bug 6796, bug 20255, bug 20256). 
Some architectures have their own versions of fdim functions, which
are missing errno setting (bug 6796) and may also return sNaN instead
of qNaN for sNaN input, in the case of the x86 / x86_64 long double
versions (bug 20256).

These versions are not actually doing anything that a compiler
couldn't generate, just straightforward comparisons / arithmetic (and,
in the x86 / x86_64 case, testing for NaNs with fxam, which isn't
actually needed once you use an unordered comparison and let the NaNs
pass through the same subtraction as non-NaN inputs).  This patch
removes the x86 / x86_64 / powerpc versions, so that those
architectures use the generic C versions, which correctly handle
setting errno and deal properly with sNaN inputs.  This seems better
than dealing with setting errno in lots of .S versions.

The i386 versions also return results with excess range and precision,
which is not appropriate for a function exactly defined by reference
to IEEE operations.  For errno setting to work correctly on overflow,
it's necessary to remove excess range with math_narrow_eval, which
this patch duly does in the float and double versions so that the
tests can reliably pass on x86.  For float, this avoids any double
rounding issues as the long double precision is more than twice that
of float.  For double, double rounding issues will need to be
addressed separately, so this patch does not fully fix bug 20255.

Tested for x86_64, x86 and powerpc.

	[BZ #6796]
	[BZ #20255]
	[BZ #20256]
	* math/s_fdim.c: Include <math_private.h>.
	(__fdim): Use math_narrow_eval on result.
	* math/s_fdimf.c: Include <math_private.h>.
	(__fdimf): Use math_narrow_eval on result.
	* sysdeps/i386/fpu/s_fdim.S: Remove file.
	* sysdeps/i386/fpu/s_fdimf.S: Likewise.
	* sysdeps/i386/fpu/s_fdiml.S: Likewise.
	* sysdeps/i386/i686/fpu/s_fdim.S: Likewise.
	* sysdeps/i386/i686/fpu/s_fdimf.S: Likewise.
	* sysdeps/i386/i686/fpu/s_fdiml.S: Likewise.
	* sysdeps/powerpc/fpu/s_fdim.c: Likewise.
	* sysdeps/powerpc/fpu/s_fdimf.c: Likewise.
	* sysdeps/powerpc/powerpc32/fpu/s_fdim.c: Likewise.
	* sysdeps/powerpc/powerpc64/fpu/s_fdim.c: Likewise.
	* sysdeps/x86_64/fpu/s_fdiml.S: Likewise.
	* math/libm-test.inc (fdim_test_data): Expect errno setting on
	overflow.  Add sNaN tests.
 2016-06-14 16:04:19 +00:00
Joseph Myers
88283451b2 Fix frexp (NaN) (bug 20250). 
Various implementations of frexp functions return sNaN for sNaN
input.  This patch fixes them to add such arguments to themselves so
that qNaN is returned.

Tested for x86_64, x86, mips64 and powerpc.

	[BZ #20250]
	* sysdeps/i386/fpu/s_frexpl.S (__frexpl): Add non-finite input to
	itself.
	* sysdeps/ieee754/dbl-64/s_frexp.c (__frexp): Add non-finite or
	zero input to itself.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_frexp.c (__frexp):
	Likewise.
	* sysdeps/ieee754/flt-32/s_frexpf.c (__frexpf): Likewise.
	* sysdeps/ieee754/ldbl-128/s_frexpl.c (__frexpl): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_frexpl.c (__frexpl): Likewise.
	* sysdeps/ieee754/ldbl-96/s_frexpl.c (__frexpl): Likewise.
	* math/libm-test.inc (frexp_test_data): Add sNaN tests.
 2016-06-13 17:27:19 +00:00
Joseph Myers
f00faa4a43 Fix i386/x86_64 log2l (sNaN) (bug 20235). 
The i386/x86_64 versions of log2l return sNaN for sNaN input.  This
patch fixes them to add NaN inputs to themselves so that qNaN is
returned in this case.

Tested for x86_64 and x86.

	[BZ #20235]
	* sysdeps/i386/fpu/e_log2l.S (__ieee754_log2l): Add NaN input to
	itself.
	* sysdeps/x86_64/fpu/e_log2l.S (__ieee754_log2l): Likewise.
	* math/libm-test.inc (log2_test_data): Add sNaN tests.
 2016-06-09 18:04:30 +00:00
Joseph Myers
8c010e2f71 Fix i386/x86_64 log1pl (sNaN) (bug 20229). 
The i386/x86_64 versions of log1pl return sNaN for sNaN input.  This
patch fixes them to add a NaN input to itself so that qNaN is returned
in this case.

Tested for x86_64 and x86.

	[BZ #20229]
	* sysdeps/i386/fpu/s_log1pl.S (__log1pl): Add NaN input to itself.
	* sysdeps/x86_64/fpu/s_log1pl.S (__log1pl): Likewise.
	* math/libm-test.inc (log1p_test_data): Add sNaN tests.
 2016-06-08 23:11:42 +00:00
Joseph Myers
09096b3615 Fix i386/x86_64 log10l (sNaN) (bug 20228). 
The i386/x86_64 versions of log10l return sNaN for sNaN input.  This
patch fixes them to add a NaN input to itself so that qNaN is returned
in this case.

Tested for x86_64 and x86.

	[BZ #20228]
	* sysdeps/i386/fpu/e_log10l.S (__ieee754_log10l): Add NaN input to
	itself.
	* sysdeps/x86_64/fpu/e_log10l.S (__ieee754_log10l): Likewise.
	* math/libm-test.inc (log10_test_data): Add sNaN tests.
 2016-06-08 22:59:18 +00:00
Joseph Myers
df179d8808 Fix i386/x86_64 logl (sNaN) (bug 20227). 
The i386/x86_64 versions of logl return sNaN for sNaN input.  This
patch fixes them to add a NaN input to itself so that qNaN is returned
in this case.

Tested for x86_64 and x86 (including a build for i586 to cover the
non-i686 logl version).

	[BZ #20227]
	* sysdeps/i386/fpu/e_logl.S (__ieee754_logl): Add NaN input to
	itself.
	* sysdeps/i386/i686/fpu/e_logl.S (__ieee754_logl): Likewise.
	* sysdeps/x86_64/fpu/e_logl.S (__ieee754_logl): Likewise.
	* math/libm-test.inc (log_test_data): Add sNaN tests.
 2016-06-08 22:24:06 +00:00
Joseph Myers
9bd3ef8e19 Fix i386/x86_64 expl, exp10l, expm1l for sNaN input (bug 20226). 
The i386 and x86_64 implementations of expl, exp10l and expm1l (code
shared between the functions) return sNaN for sNaN input.  This patch
fixes them to add NaN inputs to themselves so that qNaN is returned in
this case.

Tested for x86_64 and x86.

	[BZ #20226]
	* sysdeps/i386/fpu/e_expl.S (IEEE754_EXPL): Add NaN argument to
	itself.
	* sysdeps/x86_64/fpu/e_expl.S (IEEE754_EXPL): Likewise.
	* math/libm-test.inc (exp_test_data): Add sNaN tests.
	(exp10_test_data): Likewise.
	(expm1_test_data): Likewise.
 2016-06-08 21:55:06 +00:00
Joseph Myers
40720ec9f9 Fix i386 cbrtl (sNaN) (bug 20224). 
The i386 version of cbrtl returns sNaN (without raising any
exceptions) for sNaN input.  This patch fixes it to add non-finite
arguments to themselves (the code path in question is also reached for
zero arguments, for which adding them to themselves is also harmless),
so that "invalid" is raised and qNaN returned.

Tested for x86_64 and x86.

	[BZ #20224]
	* sysdeps/i386/fpu/s_cbrtl.S (__cbrtl): Add non-finite or zero
	argument to itself.
	* math/libm-test.inc (cbrt_test_data): Add sNaN tests.
 2016-06-08 21:02:40 +00:00
Joseph Myers
8fa8a330f9 Fix i386 atanhl (sNaN) (bug 20219). 
The i386 version of atanhl returns sNaN for sNaN input.  This patch
fixes it to add NaN arguments to themselves so it returns qNaN in this
case.

Tested for x86_64 and x86.

	[BZ #20219]
	* sysdeps/i386/fpu/e_atanhl.S (__ieee754_atanhl): Add NaN argument
	to itself.
	* math/libm-test.inc (atanh_test_data): Add sNaN tests.
 2016-06-07 23:08:32 +00:00
Joseph Myers
c23805a95d Fix i386 asinhl (sNaN) (bug 20218). 
The i386 version of asinhl returns sNaN (without raising any
exceptions) for sNaN input.  This patch fixes it to add non-finite
arguments to themselves, so that "invalid" is raised and qNaN
returned.

Tested for x86_64 and x86.

	[BZ #20218]
	* sysdeps/i386/fpu/s_asinhl.S (__asinhl): Add non-finite argument
	to itself.
	* math/libm-test.inc (asinh_test_data): Add sNaN tests.
 2016-06-07 22:54:58 +00:00
Joseph Myers
8cbd1453ec Fix x86/x86_64 nextafterl incrementing negative subnormals (bug 20205). 
The x86 / x86_64 implementation of nextafterl (also used for
nexttowardl) produces incorrect results (NaNs) when negative
subnormals, the low 32 bits of whose mantissa are zero, are
incremented towards zero.  This patch fixes this by disabling the
logic to decrement the exponent in that case.

Tested for x86_64 and x86.

	[BZ #20205]
	* sysdeps/i386/fpu/s_nextafterl.c (__nextafterl): Do not adjust
	exponent when incrementing negative subnormal with low mantissa
	word zero.
	* math/libm-test.inc (nextafter_test_data) [TEST_COND_intel96]:
	Add another test.
 2016-06-03 21:30:12 +00:00
H.J. Lu
4facca0b0e Call init_cpu_features only if SHARED is defined 
In static executable, since init_cpu_features is called early from
__libc_start_main, there is no need to call it again in dl_platform_init.

	[BZ #20072]
	* sysdeps/i386/dl-machine.h (dl_platform_init): Call
	init_cpu_features only if SHARED is defined.
	* sysdeps/x86_64/dl-machine.h (dl_platform_init): Likewise.
 2016-05-13 08:29:33 -07:00
H.J. Lu
2a1f15b1a9 Remove x86 ifunc-defines.sym and rtld-global-offsets.sym 
Merge x86 ifunc-defines.sym with x86 cpu-features-offsets.sym.  Remove
x86 ifunc-defines.sym and rtld-global-offsets.sym.  No code changes on
i686 and x86-64.

	* sysdeps/i386/i686/multiarch/Makefile (gen-as-const-headers):
	Remove ifunc-defines.sym.
	* sysdeps/x86_64/multiarch/Makefile (gen-as-const-headers):
	Likewise.
	* sysdeps/i386/i686/multiarch/ifunc-defines.sym: Removed.
	* sysdeps/x86/rtld-global-offsets.sym: Likewise.
	* sysdeps/x86_64/multiarch/ifunc-defines.sym: Likewise.
	* sysdeps/x86/Makefile (gen-as-const-headers): Remove
	rtld-global-offsets.sym.
	* sysdeps/x86_64/multiarch/ifunc-defines.sym: Merged with ...
	* sysdeps/x86/cpu-features-offsets.sym: This.
	* sysdeps/x86/cpu-features.h: Include <cpu-features-offsets.h>
	instead of <ifunc-defines.h> and <rtld-global-offsets.h>.
 2016-05-11 05:51:39 -07:00
H.J. Lu
a9558b49b3 Move sysdeps/x86_64/cacheinfo.c to sysdeps/x86 
Move sysdeps/x86_64/cacheinfo.c to sysdeps/x86.  No code changes on x86
and x86_64.

	* sysdeps/i386/cacheinfo.c: Include <sysdeps/x86/cacheinfo.c>
	instead of <sysdeps/x86_64/cacheinfo.c>.
	* sysdeps/x86_64/cacheinfo.c: Moved to ...
	* sysdeps/x86/cacheinfo.c: Here.
 2016-05-08 08:49:18 -07:00
Khem Raj
1a5d01e79e When disabling SSE, make sure -fpmath is not set to use SSE either 
This fixes errors when we inject sse options through CFLAGS and now
that we have -Werror turned on by default this warning turns into an
error on x86:

$ gcc -m32 -march=core2 -mtune=core2 -msse3 -mfpmath=sse -x c /dev/null -S -mno-sse -mno-mmx
/dev/null:1:0: warning: SSE instruction set disabled, using 387 arithmetics

Where as:

$ gcc -m32 -march=core2 -mtune=core2 -msse3 -mfpmath=sse -x c /dev/null -S -mno-sse -mno-mmx -mfpmath=387

Generates no warnings.
 2016-04-09 22:14:24 -04:00
Mike Frysinger
b2d4456b33 configure: fix test == usage 
POSIX defines the = operator, but not ==.  Fix the few places where we
incorrectly used ==.
 2016-04-09 20:05:13 -04:00
Wilco Dijkstra
d3496c9f4f Improve generic strcspn performance 
Improve strcspn performance using a much faster algorithm.  It is kept simple
so it works well on most targets.  It is generally at least 10 times faster
than the existing implementation on bench-strcspn on a few AArch64
implementations, and for some tests 100 times as fast (repeatedly calling
strchr on a small string is extremely slow...).

In fact the string/bits/string2.h inlines make no longer sense, as GCC
already uses strlen if reject is an empty string, strchrnul is 5 times as
fast as __strcspn_c1, while __strcspn_c2 and __strcspn_c3 are slower than
the strcspn main loop for large strings (though reject length 2-4 could be
special cased in the future to gain even more performance).

Tested on x86_64, i686, and aarch64.

	* string/Version (libc): Add GLIBC_2.24.
	* string/strcspn.c (strcspn): Rewrite function.
	* string/bits/string2.h (strcspn): Use __builtin_strcspn.
	(__strcspn_c1): Remove inline function.
	(__strcspn_c2): Likewise.
	(__strcspn_c3): Likewise.
	* string/string-inline.c
	[SHLIB_COMPAT(libc, GLIBC_2_1_1, GLIBC_2_24)] (__strcspn_c1): Add
	compatibility symbol.
	[SHLIB_COMPAT(libc, GLIBC_2_1_1, GLIBC_2_24)] (__strcspn_c2):
	Likewise.
	[SHLIB_COMPAT(libc, GLIBC_2_1_1, GLIBC_2_24)] (__strcspn_c3):
	Likewise.
	* sysdeps/i386/string-inlines.c: Include generic string-inlines.c.
 2016-04-01 10:44:40 -03:00
Joseph Myers
c898991d8b Fix x86_64 / x86 powl inaccuracy for integer exponents (bug 19848). 
Bug 19848 reports cases where powl on x86 / x86_64 has error
accumulation, for small integer exponents, larger than permitted by
glibc's accuracy goals, at least in some rounding modes.  This patch
further restricts the exponent range for which the
small-integer-exponent logic is used to limit the possible error
accumulation.

Tested for x86_64 and x86 and ulps updated accordingly.

	[BZ #19848]
	* sysdeps/i386/fpu/e_powl.S (p3): Rename to p2 and change value
	from 8 to 4.
	(__ieee754_powl): Compare integer exponent against 4 not 8.
	* sysdeps/x86_64/fpu/e_powl.S (p3): Rename to p2 and change value
	from 8 to 4.
	(__ieee754_powl): Compare integer exponent against 4 not 8.
	* math/auto-libm-test-in: Add more tests of pow.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2016-03-24 01:32:52 +00:00
Carlos O'Donell
b4f518ecfa Fix building glibc master with NDEBUG and --with-cpu. 
When building on i686, x86_64, and arm, and with NDEBUG, or --with-cpu
there are various variables and functions which are unused based on
these settings.

This patch marks all such variables with __attribute__((unused)) to
avoid the compiler warnings when building with the aformentioned
options.
 2016-03-15 23:23:24 -04:00
H.J. Lu
4e940b2f4b Use HAS_ARCH_FEATURE with Fast_Rep_String 
HAS_ARCH_FEATURE, not HAS_CPU_FEATURE, should be used with
Fast_Rep_String.

	[BZ #19762]
	* sysdeps/i386/i686/multiarch/bcopy.S (bcopy): Use
	HAS_ARCH_FEATURE with Fast_Rep_String.
	* sysdeps/i386/i686/multiarch/bzero.S (__bzero): Likewise.
	* sysdeps/i386/i686/multiarch/memcpy.S (memcpy): Likewise.
	* sysdeps/i386/i686/multiarch/memcpy_chk.S (__memcpy_chk):
	Likewise.
	* sysdeps/i386/i686/multiarch/memmove_chk.S (__memmove_chk):
	Likewise.
	* sysdeps/i386/i686/multiarch/mempcpy.S (__mempcpy): Likewise.
	* sysdeps/i386/i686/multiarch/mempcpy_chk.S (__mempcpy_chk):
	Likewise.
	* sysdeps/i386/i686/multiarch/memset.S (memset): Likewise.
	* sysdeps/i386/i686/multiarch/memset_chk.S (__memset_chk):
	Likewise.
 2016-03-06 08:23:51 -08:00
Marko Myllynen
48d0341cdd Make shebang interpreter directives consistent 2016-01-07 04:03:21 -05:00
Joseph Myers
f7a9f785e5 Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
Aurelien Jarno
5537f466d6 i386: move ULPs to i686/multiarch and regenerate new ones for i386 
The i386 ULPs are actually the i686/multiarch ones. The i686/multiarch
float ULPs are more precise as the SSE2 version (when available) uses
double for the cosf and sinf functions.

On the other hand the higher precision of the x86 FPU improves the
precision for a few other math functions.

	* sysdeps/i386/fpu/libm-test-ulps: Move to ....
	* sysdeps/i386/i686/multiarch/fpu/libm-test-ulps: ...here.
	* sysdeps/i386/fpu/libm-test-ulps: Regenerate.
 2015-12-20 16:36:45 +01:00
Samuel Thibault
6e45e6ef4d Fix hurd build with hidden support 
* hurd/sigunwind.c (_hurdsig_longjmp_from_handler): Destroy reply port
	of interrupted RPC instead of restoring it.

	* sysdeps/i386/setjmp.S (__sigsetjmp): Add hidden_def.
	* sysdeps/mach/hurd/accept4.c (__libc_accept4): Remove
	libc_hidden_def.
	* sysdeps/mach/hurd/dl-sysdep.c (__libc_stack_end): Add relro
	attribute, define rtld_hidden_data_def.
	* sysdeps/mach/hurd/fxstatat64.c (__fxstatat64): Add libc_hidden_def.
	* sysdeps/mach/hurd/if_index.c (__if_freenameindex): Add
	libc_hidden_def.
	(if_freenameindex): Add libc_hidden_weak.
	(if_nameindex): Add libc_hidden_weak.
	* sysdeps/mach/hurd/open.c (_open64): Rename libc_hidden_weak into
	__open64.
	* sysdeps/mach/hurd/sigwait.c (__sigwait): Add libc_hidden_def.
	* sysdeps/mach/hurd/xmknodat.c (__xmknodat): Add libc_hidden_def.
	* sysdeps/mach/nanosleep.c: Include <time.h>
	(__nanosleep): Rename to __libc_nanosleep.
	(__nanosleep): Add weak_alias.
	(nanosleep): Update alias.
	* sysdeps/mach/hurd/configure.ac (NO_HIDDEN): Do not define.
	* sysdeps/mach/hurd/configure: Regenerate.
 2015-11-25 02:35:18 +01:00
Joseph Myers
2d2c271aea Fix math_private.h multiple include guards. 
Various math_private.h headers are guarded by "#ifndef
_MATH_PRIVATE_H", but never define the macro.  Nothing else defines
the macro either (the generic math_private.h that they include defines
a different macro, _MATH_PRIVATE_H_), so those guards are ineffective.

With the recent inclusion of s_sin.c in s_sincos.c, this breaks the
build for MIPS, since the build of s_sincos.c ends up including
<math_private.h> twice and the MIPS version defines inline functions
such as libc_feholdexcept_mips, without a separate fenv_private.h
header with its own guards such as some architectures have.

This patch fixes all the problem headers to use architecture-specific
guard macro names, and to define those macros in the headers they
guard, just as some architectures already do.

Tested for x86 (testsuite, and that installed shared libraries are
unchanged by the patch), and for mips64 (that it fixes the build).

	* sysdeps/arm/math_private.h [!_MATH_PRIVATE_H]: Change guard to
	[!ARM_MATH_PRIVATE_H].
	[!ARM_MATH_PRIVATE_H] (ARM_MATH_PRIVATE_H): Define macro.
	* sysdeps/hppa/math_private.h [!_MATH_PRIVATE_H]: Change guard to
	[!HPPA_MATH_PRIVATE_H].
	[!HPPA_MATH_PRIVATE_H] (HPPA_MATH_PRIVATE_H): Define macro.
	* sysdeps/i386/fpu/math_private.h [!_MATH_PRIVATE_H]: Change guard
	to [!I386_MATH_PRIVATE_H].
	[!I386_MATH_PRIVATE_H] (I386_MATH_PRIVATE_H): Define macro.
	* sysdeps/m68k/m680x0/fpu/math_private.h [!_MATH_PRIVATE_H]:
	Change guard to [!M68K_MATH_PRIVATE_H].
	[!M68K_MATH_PRIVATE_H] (M68K_MATH_PRIVATE_H): Define macro.
	* sysdeps/microblaze/math_private.h [!_MATH_PRIVATE_H]: Change
	guard to [!MICROBLAZE_MATH_PRIVATE_H].
	[!MICROBLAZE_MATH_PRIVATE_H] (MICROBLAZE_MATH_PRIVATE_H): Define
	macro.
	* sysdeps/mips/math_private.h [!_MATH_PRIVATE_H]: Change guard to
	[!MIPS_MATH_PRIVATE_H].
	[!MIPS_MATH_PRIVATE_H] (MIPS_MATH_PRIVATE_H): Define macro.
	* sysdeps/nios2/math_private.h [!_MATH_PRIVATE_H]: Change guard to
	[!NIO2_MATH_PRIVATE_H].
	[!NIO2_MATH_PRIVATE_H] (NIO2_MATH_PRIVATE_H): Define macro.
	* sysdeps/tile/math_private.h [!_MATH_PRIVATE_H]: Change guard to
	[!TILE_MATH_PRIVATE_H].
	[!TILE_MATH_PRIVATE_H] (TILE_MATH_PRIVATE_H): Define macro.
 2015-11-20 23:46:23 +00:00
Joseph Myers
01189b083b Fix i386/x86_64 log* (1) zero sign for -ffinite-math-only (bug 19213). 
For the -ffinite-math-only versions of various x86_64 and x86 log*
functions, a zero result from log* (1) is returned with incorrect sign
in round-downward mode.  This patch fixes this in a similar way to the
previous fixes for the non-*_finite versions of the functions.

Tested for x86_64 and x86 (including an i586 build), together with a
patch that will be applied separately to enable the main libm-test.inc
tests for the finite-math-only functions.

	[BZ #19213]
	* sysdeps/i386/fpu/e_log.S (__log_finite): Ensure +0 is always
	returned for argument 1.
	* sysdeps/i386/fpu/e_logf.S (__logf_finite): Likewise.
	* sysdeps/i386/fpu/e_logl.S (__logl_finite): Likewise.
	* sysdeps/i386/i686/fpu/e_logl.S (__logl_finite): Likewise.
	* sysdeps/x86_64/fpu/e_log10l.S (__log10l_finite): Likewise.
	* sysdeps/x86_64/fpu/e_log2l.S (__log2l_finite): Likewise.
	* sysdeps/x86_64/fpu/e_logl.S (__logl_finite): Likewise.
 2015-11-05 21:56:31 +00:00
Joseph Myers
9f9f27248b Remove miscellaneous GCC >= 4.7 version conditionals. 
This patch removes miscellaneous __GNUC_PREREQ (4, 7) conditionals
that are now dead.

Tested for x86_64 and x86 (testsuite, and that installed stripped
shared libraries are unchanged by the patch).

	* sysdeps/arm/atomic-machine.h
	[__GNUC_PREREQ (4, 7) && __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4]:
	Change conditional to [__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4].
	[__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 && !__GNUC_PREREQ (4, 7)]:
	Remove conditional code.
	[!__GNUC_PREREQ (4, 7) || !__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4]:
	Change conditional to [!__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4].
	* sysdeps/i386/sysdep.h [__ASSEMBLER__ && __GNUC_PREREQ (4, 7)]:
	Change conditional to [__ASSEMBLER__].
	[__ASSEMBLER__ && !__GNUC_PREREQ (4, 7)]: Remove conditional code.
	[!__ASSEMBLER__ && __GNUC_PREREQ (4, 7)]: Change conditional to
	[!__ASSEMBLER__].
	[!__ASSEMBLER__ && !__GNUC_PREREQ (4, 7)]: Remove conditional
	code.
	* sysdeps/unix/sysv/linux/sh/atomic-machine.h (rNOSP): Remove
	conditional macro definitions.
	(__arch_compare_and_exchange_val_8_acq): Use "u" instead of rNOSP.
	(__arch_compare_and_exchange_val_16_acq): Likewise.
	(__arch_compare_and_exchange_val_32_acq): Likewise.
	(atomic_exchange_and_add): Likewise.
	(atomic_add): Likewise.
	(atomic_add_negative): Likewise.
	(atomic_add_zero): Likewise.
	(atomic_bit_set): Likewise.
	(atomic_bit_test_set): Likewise.
	* sysdeps/x86_64/atomic-machine.h [__GNUC_PREREQ (4, 7)]: Make
	code unconditional.
	[!__GNUC_PREREQ (4, 7)]: Remove conditional code.
 2015-11-04 21:34:36 +00:00
Joseph Myers
199a338654 Add more libm tests (scalb*, signbit, sin, sincos, sinh, sqrt, tan, tanh, tgamma, y0, y1, yn, significand). 
This patch improves the libm test coverage for a few more functions.

Tested for x86_64 and x86.

	* math/auto-libm-test-in: Add more tests of sin, sincos, sinh,
	sqrt, tan, tanh, y0, y1 and yn.
	* math/auto-libm-test-out: Regenerated.
	* math/libm-test.inc (scalb_test_data): Add more tests.
	(scalbn_test_data): Likewise.
	(scalbln_test_data): Likewise.
	(signbit_test_data): Likewise.
	(sin_test_data): Likewise.
	(sincos_test_data): Likewise.
	(sinh_test_data): Likewise.
	(sqrt_test_data): Likewise.
	(tan_test_data): Likewise.
	(tanh_test_data): Likewise.
	(tgamma_test_data): Likewise.
	(y0_test_data): Likewise.
	(y1_test_data): Likewise.
	(yn_test_data): Likewise.
	(significand_test_data): Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
 2015-11-04 00:45:23 +00:00
Joseph Myers
85422c2acb Make nextafter, nexttoward set errno (bug 6799). 
nextafter and nexttoward fail to set errno on overflow and underflow.
This patch makes them do so in cases that should include all the cases
where such errno setting is required by glibc's goals for when to set
errno (but not all cases of underflow where the result is nonzero and
so glibc's goals do not require errno setting).

Tested for x86_64, x86, mips64 and powerpc.

	[BZ #6799]
	* math/s_nextafter.c: Include <errno.h>.
	(__nextafter): Set errno on overflow and underflow.
	* math/s_nexttowardf.c: Include <errno.h>.
	(__nexttowardf): Set errno on overflow and underflow.
	* sysdeps/i386/fpu/s_nextafterl.c: Include <errno.h>.
	(__nextafterl): Set errno on overflow and underflow.
	* sysdeps/i386/fpu/s_nexttoward.c: Include <errno.h>.
	(__nexttoward): Set errno on overflow and underflow.
	* sysdeps/i386/fpu/s_nexttowardf.c: Include <errno.h>.
	(__nexttowardf): Set errno on overflow and underflow.
	* sysdeps/ieee754/flt-32/s_nextafterf.c: Include <errno.h>.
	(__nextafterf): Set errno on overflow and underflow.
	* sysdeps/ieee754/ldbl-128/s_nextafterl.c: Include <errno.h>.
	(__nextafterl): Set errno on overflow and underflow.
	* sysdeps/ieee754/ldbl-128/s_nexttoward.c: Include <errno.h>.
	(__nexttoward): Set errno on overflow and underflow.
	* sysdeps/ieee754/ldbl-128/s_nexttowardf.c: Include <errno.h>.
	(__nexttowardf): Set errno on overflow and underflow.
	* sysdeps/ieee754/ldbl-128ibm/s_nextafterl.c: Include <errno.h>.
	(__nextafterl): Set errno on overflow and underflow.
	* sysdeps/ieee754/ldbl-128ibm/s_nexttoward.c: Include <errno.h>.
	(__nexttoward): Set errno on overflow and underflow.
	* sysdeps/ieee754/ldbl-128ibm/s_nexttowardf.c: Include <errno.h>.
	(__nexttowardf): Set errno on overflow and underflow.
	* sysdeps/ieee754/ldbl-96/s_nexttoward.c: Include <errno.h>.
	(__nexttoward): Set errno on overflow and underflow.
	* sysdeps/ieee754/ldbl-96/s_nexttowardf.c: Include <errno.h>.
	(__nexttowardf): Set errno on overflow and underflow.
	* sysdeps/ieee754/ldbl-opt/s_nexttowardfd.c: Include <errno.h>.
	(__nldbl_nexttowardf): Set errno on overflow and underflow.
	* sysdeps/m68k/m680x0/fpu/s_nextafterl.c: Include <errno.h>.
	(__nextafterl): Set errno on overflow and underflow.
	* math/libm-test.inc (nextafter_test_data): Do not allow errno
	setting to be missing on overflow.  Add more tests.
	(nexttoward_test_data): Likewise.
 2015-11-02 18:54:19 +00:00
Joseph Myers
91bcb95ad4 Remove cpuid.h configure tests. 
There are configure tests for the cpuid.h header for x86 / x86_64.
GCC 4.3 and later install this header, so those tests are obsolete.
This patch removes them.

Tested for x86_64 and x86 (testsuite, and that installed shared
libraries are unchanged by the patch).

	* sysdeps/i386/configure.ac (cpuid.h): Do not test for header.
	* sysdeps/i386/configure: Regenerated.
	* sysdeps/x86_64/configure.ac (cpuid.h): Do not test for header.
	* sysdeps/x86_64/configure: Regenerated.
 2015-10-29 14:43:46 +00:00
Joseph Myers
2145f97cee Handle more state in i386/x86_64 fesetenv (bug 16068). 
fenv_t should include architecture-specific floating-point modes and
status flags.  i386 and x86_64 fesetenv limit which bits they use from
the x87 status and control words, when using saved state, and limit
which parts of the state they set to fixed values, when using
FE_DFL_ENV / FE_NOMASK_ENV.  The following should be included but are
excluded in at least some cases: status and masking for the "denormal
operand" exception (which isn't part of FE_ALL_EXCEPT); precision
control (explicitly mentioned in Annex F as something that counts as
part of the floating-point environment); MXCSR FZ and DAZ bits (for
FE_DFL_ENV and FE_NOMASK_ENV).  This patch arranges for this extra
state to be handled by fesetenv (and thereby by feupdateenv, which
calls fesetenv).

(Note that glibc functions using floating point are not generally
expected to work correctly with non-default values of this state,
especially precision control, but it is still logically part of the
floating-point environment and should be handled as such by fesetenv.
Changes to the state relating to subnormals ought generally to work
with libm functions when the arguments aren't subnormal and neither
are the expected results; that's a consequence of functions avoiding
spurious internal underflows.)

A question arising from this is whether FE_NOMASK_ENV should or should
not mask the "denormal operand" exception.  I decided it should mask
that exception.  This is the status quo - previously that exception
could only be unmasked by direct manipulation of control registers
(possibly via <fpu_control.h>).  In addition, it means that use of
FE_NOMASK_ENV leaves a floating-point environment the same as could be
obtained by fesetenv (FE_DFL_ENV); feenableexcept (FE_ALL_EXCEPT);,
rather than an environment in which an exception is unmasked that
could only be masked again by using fesetenv with FE_DFL_ENV (or a
previously saved environment) - this exception not being usable with
other <fenv.h> functions because it's outside FE_ALL_EXCEPT.

Tested for x86_64 and x86.

	[BZ #16068]
	* sysdeps/i386/fpu/fesetenv.c: Include <fpu_control.h>.
	(FE_ALL_EXCEPT_X86): New macro.
	(__fesetenv): Use FE_ALL_EXCEPT_X86 in most places instead of
	FE_ALL_EXCEPT.  Ensure precision control is included in
	floating-point state.  Ensure that FE_DFL_ENV and FE_NOMASK_ENV
	handle "denormal operand exception" and clear FZ and DAZ bits.
	* sysdeps/x86_64/fpu/fesetenv.c: Include <fpu_control.h>.
	(FE_ALL_EXCEPT_X86): New macro.
	(__fesetenv): Use FE_ALL_EXCEPT_X86 in most places instead of
	FE_ALL_EXCEPT.  Ensure precision control is included in
	floating-point state.  Ensure that FE_DFL_ENV and FE_NOMASK_ENV
	handle "denormal operand exception" and clear FZ and DAZ bits.
	* sysdeps/x86/fpu/test-fenv-sse-2.c: New file.
	* sysdeps/x86/fpu/test-fenv-x87.c: Likewise.
	* sysdeps/x86/fpu/Makefile [$(subdir) = math] (tests): Add
	test-fenv-x87 and test-fenv-sse-2.
	[$(subdir) = math] (CFLAGS-test-fenv-sse-2.c): New variable.
 2015-10-28 22:58:29 +00:00
Joseph Myers
0b9af583a5 Fix i386/x86_64 fesetenv SSE exception clearing (bug 19181). 
The i386 and x86_64 versions of fesetenv, when called with FE_DFL_ENV
or FE_NOMASK_ENV as argument, do not clear SSE exceptions raised in
MXCSR.  These arguments should, like other fenv_t values, represent
the whole of the floating-point state, so such exceptions should be
cleared; this patch adds the required clearing.  (Discovered while
working on bug 16068.)

Tested for x86_64 and x86.

	[BZ #19181]
	* sysdeps/i386/fpu/fesetenv.c (__fesetenv): Clear already-raised
	SSE exceptions when argument is FE_DFL_ENV or FE_NOMASK_ENV.
	* sysdeps/x86_64/fpu/fesetenv.c (__fesetenv): Likewise.
	* math/test-fenv-clear-main.c: New file.
	* math/test-fenv-clear.c: Likewise.
	* math/Makefile (tests): Add test-fenv-clear.
	* sysdeps/x86/fpu/test-fenv-clear-sse.c: New file.
	* sysdeps/x86/fpu/Makefile [$(subdir) = math] (tests): Add
	test-fenv-clear-sse.
	[$(subdir) = math] (CFLAGS-test-fenv-clear-sse.c): New variable.
 2015-10-28 18:50:20 +00:00
Joseph Myers
c871b9b096 Remove -mavx2 configure tests. 
There are configure tests for the -mavx2 compiler option.  AVX2
support was added in GCC 4.7, so these tests are now obsolete; this
patch removes them.

Tested for x86_64 and x86 (testsuite, and that installed stripped
shared libraries are unchanged by the patch).

	* sysdeps/i386/configure.ac (libc_cv_cc_avx2): Remove configure
	test.
	* sysdeps/i386/configure: Regenerated.
	* sysdeps/x86_64/configure.ac (libc_cv_cc_avx2): Remove configure
	test.
	* sysdeps/x86_64/configure: Regenerated.
	* config.h.in (HAVE_AVX2_SUPPORT): Remove #undef.
	* sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add
	memset-avx2 unconditionally instead of conditionally on
	[$(config-cflags-avx2) = yes].
	* sysdeps/x86_64/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list) [HAVE_AVX2_SUPPORT]: Make code
	unconditional.
	* sysdeps/x86_64/multiarch/memset.S [HAVE_AVX2_SUPPORT]: Likewise.
	* sysdeps/x86_64/multiarch/memset_chk.S
	[IS_IN (libc) && SHARED && HAVE_AVX2_SUPPORT]: Change conditional
	to [IS_IN (libc) && SHARED].
 2015-10-28 13:29:03 +00:00
Joseph Myers
846d9a4a3a Fix i386 / x86_64 nearbyint exception clearing (bug 15491). 
The implementations of nearbyint functions using x87 floating point
(i386 all versions, x86_64 long double only) use the fclex
instruction, which clears any exceptions that were raised before the
function was called.  These functions must not clear exceptions that
were raised before they were called.

This patch fixes these functions to save and restore the whole
floating-point environment (fnstenv / fldenv) as the way of avoiding
raising "inexact" (recall that there isn't an x87 instruction for
loading just the status word, so the whole environment has to be saved
and loaded instead - the code already saved and loaded the control
word, which is now obtained from the saved environment after this
patch, to disable traps on "inexact").  In the case of the long double
functions, any "invalid" exception from frndint (applied to a
signaling NaN) needs merging into the saved state; this issue doesn't
apply to the float and double functions because that exception would
have been raised when the argument is loaded, before the environment
is saved.

	[BZ #15491]
	* sysdeps/i386/fpu/s_nearbyint.S (__nearbyint): Save and restore
	floating-point environment instead of clearing all exceptions.
	* sysdeps/i386/fpu/s_nearbyintf.S (__nearbyintf): Likewise.
	* sysdeps/i386/fpu/s_nearbyintl.S (__nearbyintl): Likewise,
	merging in "invalid" exceptions from frndint.
	* sysdeps/x86_64/fpu/s_nearbyintl.S (__nearbyintl): Likewise.
	* math/test-nearbyint-except.c: New file.
	* math/Makefile (tests): Add test-nearbyint-except.
 2015-10-22 23:14:55 +00:00
Joseph Myers
bd2260a206 Convert 231 sysdeps function definitions to prototype style. 
This mostly automatically-generated patch converts 231 sysdeps
function definitions in glibc from old-style K&R to prototype-style.

For __aio_sigqueue and __gai_sigqueue I had to add internal_function
to the definitions as noted by Florian in
<https://sourceware.org/ml/libc-alpha/2015-10/msg00595.html> to keep
the functions compiling on x86 after conversion to prototype
definitions.  Otherwise, the patch is automatically generated with all
the same exclusions and caveats as in
<https://sourceware.org/ml/libc-alpha/2015-10/msg00594.html> except
that it's a patch for sysdeps files.

Tested for x86_64 and x86 (testsuite, and that installed stripped
shared libraries are unchanged by the patch).  Also tested for arm,
mips64 and powerpc32 that installed stripped shared libraries are
unchanged by the patch.

	* sysdeps/arm/backtrace.c (__backtrace): Convert to
	prototype-style function definition.
	* sysdeps/i386/backtrace.c (__backtrace): Likewise.
	* sysdeps/i386/ffs.c (__ffs): Likewise.
	* sysdeps/i386/i686/ffs.c (__ffs): Likewise.
	* sysdeps/ia64/nptl/pthread_spin_lock.c (pthread_spin_lock):
	Likewise.
	* sysdeps/ia64/nptl/pthread_spin_trylock.c (pthread_spin_trylock):
	Likewise.
	* sysdeps/ieee754/ldbl-128/e_log2l.c (__ieee754_log2l): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_log2l.c (__ieee754_log2l):
	Likewise.
	* sysdeps/m68k/ffs.c (__ffs): Likewise.
	* sysdeps/m68k/m680x0/fpu/e_acos.c (FUNC): Likewise.
	* sysdeps/m68k/m680x0/fpu/e_fmod.c (FUNC): Likewise.
	* sysdeps/mach/adjtime.c (__adjtime): Likewise.
	* sysdeps/mach/gettimeofday.c (__gettimeofday): Likewise.
	* sysdeps/mach/hurd/_exit.c (_exit): Likewise.
	* sysdeps/mach/hurd/access.c (__access): Likewise.
	* sysdeps/mach/hurd/adjtime.c (__adjtime): Likewise.
	* sysdeps/mach/hurd/chdir.c (__chdir): Likewise.
	* sysdeps/mach/hurd/chmod.c (__chmod): Likewise.
	* sysdeps/mach/hurd/chown.c (__chown): Likewise.
	* sysdeps/mach/hurd/cthreads.c (cthread_keycreate): Likewise.
	(cthread_getspecific): Likewise.
	(cthread_setspecific): Likewise.
	(__libc_getspecific): Likewise.
	* sysdeps/mach/hurd/euidaccess.c (__euidaccess): Likewise.
	* sysdeps/mach/hurd/faccessat.c (faccessat): Likewise.
	* sysdeps/mach/hurd/fchdir.c (__fchdir): Likewise.
	* sysdeps/mach/hurd/fchmod.c (__fchmod): Likewise.
	* sysdeps/mach/hurd/fchmodat.c (fchmodat): Likewise.
	* sysdeps/mach/hurd/fchown.c (__fchown): Likewise.
	* sysdeps/mach/hurd/fchownat.c (fchownat): Likewise.
	* sysdeps/mach/hurd/flock.c (__flock): Likewise.
	* sysdeps/mach/hurd/fsync.c (fsync): Likewise.
	* sysdeps/mach/hurd/ftruncate.c (__ftruncate): Likewise.
	* sysdeps/mach/hurd/getgroups.c (__getgroups): Likewise.
	* sysdeps/mach/hurd/gethostname.c (__gethostname): Likewise.
	* sysdeps/mach/hurd/getitimer.c (__getitimer): Likewise.
	* sysdeps/mach/hurd/getlogin_r.c (__getlogin_r): Likewise.
	* sysdeps/mach/hurd/getpgid.c (__getpgid): Likewise.
	* sysdeps/mach/hurd/getrusage.c (__getrusage): Likewise.
	* sysdeps/mach/hurd/getsockname.c (__getsockname): Likewise.
	* sysdeps/mach/hurd/group_member.c (__group_member): Likewise.
	* sysdeps/mach/hurd/isatty.c (__isatty): Likewise.
	* sysdeps/mach/hurd/lchown.c (__lchown): Likewise.
	* sysdeps/mach/hurd/link.c (__link): Likewise.
	* sysdeps/mach/hurd/linkat.c (linkat): Likewise.
	* sysdeps/mach/hurd/listen.c (__listen): Likewise.
	* sysdeps/mach/hurd/mkdir.c (__mkdir): Likewise.
	* sysdeps/mach/hurd/mkdirat.c (mkdirat): Likewise.
	* sysdeps/mach/hurd/openat.c (__openat): Likewise.
	* sysdeps/mach/hurd/poll.c (__poll): Likewise.
	* sysdeps/mach/hurd/readlink.c (__readlink): Likewise.
	* sysdeps/mach/hurd/readlinkat.c (readlinkat): Likewise.
	* sysdeps/mach/hurd/recv.c (__recv): Likewise.
	* sysdeps/mach/hurd/rename.c (rename): Likewise.
	* sysdeps/mach/hurd/renameat.c (renameat): Likewise.
	* sysdeps/mach/hurd/revoke.c (revoke): Likewise.
	* sysdeps/mach/hurd/rewinddir.c (__rewinddir): Likewise.
	* sysdeps/mach/hurd/rmdir.c (__rmdir): Likewise.
	* sysdeps/mach/hurd/seekdir.c (seekdir): Likewise.
	* sysdeps/mach/hurd/send.c (__send): Likewise.
	* sysdeps/mach/hurd/setdomain.c (setdomainname): Likewise.
	* sysdeps/mach/hurd/setegid.c (setegid): Likewise.
	* sysdeps/mach/hurd/seteuid.c (seteuid): Likewise.
	* sysdeps/mach/hurd/setgid.c (__setgid): Likewise.
	* sysdeps/mach/hurd/setgroups.c (setgroups): Likewise.
	* sysdeps/mach/hurd/sethostid.c (sethostid): Likewise.
	* sysdeps/mach/hurd/sethostname.c (sethostname): Likewise.
	* sysdeps/mach/hurd/setlogin.c (setlogin): Likewise.
	* sysdeps/mach/hurd/setpgid.c (__setpgid): Likewise.
	* sysdeps/mach/hurd/setregid.c (__setregid): Likewise.
	* sysdeps/mach/hurd/setreuid.c (__setreuid): Likewise.
	* sysdeps/mach/hurd/settimeofday.c (__settimeofday): Likewise.
	* sysdeps/mach/hurd/setuid.c (__setuid): Likewise.
	* sysdeps/mach/hurd/shutdown.c (shutdown): Likewise.
	* sysdeps/mach/hurd/sigaction.c (__sigaction): Likewise.
	* sysdeps/mach/hurd/sigaltstack.c (__sigaltstack): Likewise.
	* sysdeps/mach/hurd/sigpending.c (sigpending): Likewise.
	* sysdeps/mach/hurd/sigprocmask.c (__sigprocmask): Likewise.
	* sysdeps/mach/hurd/sigsuspend.c (__sigsuspend): Likewise.
	* sysdeps/mach/hurd/socket.c (__socket): Likewise.
	* sysdeps/mach/hurd/symlink.c (__symlink): Likewise.
	* sysdeps/mach/hurd/symlinkat.c (symlinkat): Likewise.
	* sysdeps/mach/hurd/telldir.c (telldir): Likewise.
	* sysdeps/mach/hurd/truncate.c (__truncate): Likewise.
	* sysdeps/mach/hurd/umask.c (__umask): Likewise.
	* sysdeps/mach/hurd/unlink.c (__unlink): Likewise.
	* sysdeps/mach/hurd/unlinkat.c (unlinkat): Likewise.
	* sysdeps/mips/mips64/__longjmp.c (__longjmp): Likewise.
	* sysdeps/posix/alarm.c (alarm): Likewise.
	* sysdeps/posix/cuserid.c (cuserid): Likewise.
	* sysdeps/posix/dirfd.c (dirfd): Likewise.
	* sysdeps/posix/dup.c (__dup): Likewise.
	* sysdeps/posix/dup2.c (__dup2): Likewise.
	* sysdeps/posix/euidaccess.c (euidaccess): Likewise.
	(main): Likewise.
	* sysdeps/posix/flock.c (__flock): Likewise.
	* sysdeps/posix/fpathconf.c (__fpathconf): Likewise.
	* sysdeps/posix/getcwd.c (__getcwd): Likewise.
	* sysdeps/posix/gethostname.c (__gethostname): Likewise.
	* sysdeps/posix/gettimeofday.c (__gettimeofday): Likewise.
	* sysdeps/posix/isatty.c (__isatty): Likewise.
	* sysdeps/posix/killpg.c (killpg): Likewise.
	* sysdeps/posix/libc_fatal.c (__libc_fatal): Likewise.
	* sysdeps/posix/mkfifoat.c (mkfifoat): Likewise.
	* sysdeps/posix/raise.c (raise): Likewise.
	* sysdeps/posix/remove.c (remove): Likewise.
	* sysdeps/posix/rename.c (rename): Likewise.
	* sysdeps/posix/rewinddir.c (__rewinddir): Likewise.
	* sysdeps/posix/seekdir.c (seekdir): Likewise.
	* sysdeps/posix/sigblock.c (__sigblock): Likewise.
	* sysdeps/posix/sigignore.c (sigignore): Likewise.
	* sysdeps/posix/sigintr.c (siginterrupt): Likewise.
	* sysdeps/posix/signal.c (__bsd_signal): Likewise.
	* sysdeps/posix/sigset.c (sigset): Likewise.
	* sysdeps/posix/sigsuspend.c (__sigsuspend): Likewise.
	* sysdeps/posix/sysconf.c (__sysconf): Likewise.
	* sysdeps/posix/sysv_signal.c (__sysv_signal): Likewise.
	* sysdeps/posix/time.c (time): Likewise.
	* sysdeps/posix/ttyname.c (getttyname): Likewise.
	(ttyname): Likewise.
	* sysdeps/posix/ttyname_r.c (__ttyname_r): Likewise.
	* sysdeps/posix/utime.c (utime): Likewise.
	* sysdeps/powerpc/fpu/s_isnan.c (__isnan): Likewise.
	* sysdeps/powerpc/nptl/pthread_spin_lock.c (pthread_spin_lock):
	Likewise.
	* sysdeps/powerpc/nptl/pthread_spin_trylock.c
	(pthread_spin_trylock): Likewise.
	* sysdeps/pthread/aio_error.c (aio_error): Likewise.
	* sysdeps/pthread/aio_read.c (aio_read): Likewise.
	* sysdeps/pthread/aio_read64.c (aio_read64): Likewise.
	* sysdeps/pthread/aio_write.c (aio_write): Likewise.
	* sysdeps/pthread/aio_write64.c (aio_write64): Likewise.
	* sysdeps/pthread/flockfile.c (__flockfile): Likewise.
	* sysdeps/pthread/ftrylockfile.c (__ftrylockfile): Likewise.
	* sysdeps/pthread/funlockfile.c (__funlockfile): Likewise.
	* sysdeps/pthread/timer_create.c (timer_create): Likewise.
	* sysdeps/pthread/timer_getoverr.c (timer_getoverrun): Likewise.
	* sysdeps/pthread/timer_gettime.c (timer_gettime): Likewise.
	* sysdeps/s390/ffs.c (__ffs): Likewise.
	* sysdeps/s390/nptl/pthread_spin_lock.c (pthread_spin_lock):
	Likewise.
	* sysdeps/s390/nptl/pthread_spin_trylock.c (pthread_spin_trylock):
	Likewise.
	* sysdeps/sh/nptl/pthread_spin_lock.c (pthread_spin_lock):
	Likewise.
	* sysdeps/sparc/nptl/pthread_barrier_destroy.c
	(pthread_barrier_destroy): Likewise.
	* sysdeps/sparc/nptl/pthread_barrier_wait.c
	(__pthread_barrier_wait): Likewise.
	* sysdeps/sparc/sparc32/e_sqrt.c (__ieee754_sqrt): Likewise.
	* sysdeps/sparc/sparc32/pthread_barrier_wait.c
	(__pthread_barrier_wait): Likewise.
	* sysdeps/sparc/sparc32/sem_init.c (__old_sem_init): Likewise.
	* sysdeps/tile/memcmp.c (memcmp_common_alignment): Likewise.
	(memcmp_not_common_alignment): Likewise.
	(MEMCMP): Likewise.
	* sysdeps/tile/wordcopy.c (_wordcopy_fwd_aligned): Likewise.
	(_wordcopy_fwd_dest_aligned): Likewise.
	(_wordcopy_bwd_aligned): Likewise.
	(_wordcopy_bwd_dest_aligned): Likewise.
	* sysdeps/unix/bsd/ftime.c (ftime): Likewise.
	* sysdeps/unix/bsd/gtty.c (gtty): Likewise.
	* sysdeps/unix/bsd/stty.c (stty): Likewise.
	* sysdeps/unix/bsd/tcflow.c (tcflow): Likewise.
	* sysdeps/unix/bsd/tcflush.c (tcflush): Likewise.
	* sysdeps/unix/bsd/tcgetattr.c (__tcgetattr): Likewise.
	* sysdeps/unix/bsd/tcgetpgrp.c (tcgetpgrp): Likewise.
	* sysdeps/unix/bsd/tcsendbrk.c (tcsendbreak): Likewise.
	* sysdeps/unix/bsd/tcsetattr.c (tcsetattr): Likewise.
	* sysdeps/unix/bsd/tcsetpgrp.c (tcsetpgrp): Likewise.
	* sysdeps/unix/bsd/ualarm.c (ualarm): Likewise.
	* sysdeps/unix/bsd/wait3.c (__wait3): Likewise.
	* sysdeps/unix/getlogin_r.c (__getlogin_r): Likewise.
	* sysdeps/unix/sockatmark.c (sockatmark): Likewise.
	* sysdeps/unix/stime.c (stime): Likewise.
	* sysdeps/unix/sysv/linux/_exit.c (_exit): Likewise.
	* sysdeps/unix/sysv/linux/aio_sigqueue.c (__aio_sigqueue):
	Likewise.  Use internal_function.
	* sysdeps/unix/sysv/linux/arm/sigaction.c (__libc_sigaction):
	Convert to prototype-style function definition.
	* sysdeps/unix/sysv/linux/faccessat.c (faccessat): Likewise.
	* sysdeps/unix/sysv/linux/fchmodat.c (fchmodat): Likewise.
	* sysdeps/unix/sysv/linux/fpathconf.c (__fpathconf): Likewise.
	* sysdeps/unix/sysv/linux/gai_sigqueue.c (__gai_sigqueue):
	Likewise.  Use internal_function.
	* sysdeps/unix/sysv/linux/gethostid.c (sethostid): Convert to
	prototype-style function definition
	* sysdeps/unix/sysv/linux/getlogin_r.c (__getlogin_r_loginuid):
	Likewise.
	(__getlogin_r): Likewise.
	* sysdeps/unix/sysv/linux/getpt.c (__posix_openpt): Likewise.
	* sysdeps/unix/sysv/linux/hppa/pthread_cond_broadcast.c
	(__pthread_cond_broadcast): Likewise.
	* sysdeps/unix/sysv/linux/hppa/pthread_cond_destroy.c
	(__pthread_cond_destroy): Likewise.
	* sysdeps/unix/sysv/linux/hppa/pthread_cond_init.c
	(__pthread_cond_init): Likewise.
	* sysdeps/unix/sysv/linux/hppa/pthread_cond_signal.c
	(__pthread_cond_signal): Likewise.
	* sysdeps/unix/sysv/linux/hppa/pthread_cond_wait.c
	(__pthread_cond_wait): Likewise.
	* sysdeps/unix/sysv/linux/i386/getmsg.c (getmsg): Likewise.
	* sysdeps/unix/sysv/linux/i386/setegid.c (setegid): Likewise.
	* sysdeps/unix/sysv/linux/ia64/sigaction.c (__libc_sigaction):
	Likewise.
	* sysdeps/unix/sysv/linux/ia64/sigpending.c (sigpending):
	Likewise.
	* sysdeps/unix/sysv/linux/ia64/sigprocmask.c (__sigprocmask):
	Likewise.
	* sysdeps/unix/sysv/linux/mips/sigaction.c (__libc_sigaction):
	Likewise.
	* sysdeps/unix/sysv/linux/msgget.c (msgget): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/ftruncate64.c
	(__ftruncate64): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/truncate64.c
	(truncate64): Likewise.
	* sysdeps/unix/sysv/linux/pt-raise.c (raise): Likewise.
	* sysdeps/unix/sysv/linux/pthread_getcpuclockid.c
	(pthread_getcpuclockid): Likewise.
	* sysdeps/unix/sysv/linux/pthread_getname.c (pthread_getname_np):
	Likewise.
	* sysdeps/unix/sysv/linux/pthread_setname.c (pthread_setname_np):
	Likewise.
	* sysdeps/unix/sysv/linux/pthread_sigmask.c (pthread_sigmask):
	Likewise.
	* sysdeps/unix/sysv/linux/pthread_sigqueue.c (pthread_sigqueue):
	Likewise.
	* sysdeps/unix/sysv/linux/raise.c (raise): Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/sigaction.c
	(__libc_sigaction): Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/sigpending.c (sigpending):
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/sigprocmask.c
	(__sigprocmask): Likewise.
	* sysdeps/unix/sysv/linux/semget.c (semget): Likewise.
	* sysdeps/unix/sysv/linux/semop.c (semop): Likewise.
	* sysdeps/unix/sysv/linux/setrlimit64.c (setrlimit64): Likewise.
	* sysdeps/unix/sysv/linux/shmat.c (shmat): Likewise.
	* sysdeps/unix/sysv/linux/shmdt.c (shmdt): Likewise.
	* sysdeps/unix/sysv/linux/shmget.c (shmget): Likewise.
	* sysdeps/unix/sysv/linux/sigaction.c (__libc_sigaction):
	Likewise.
	* sysdeps/unix/sysv/linux/sigpending.c (sigpending): Likewise.
	* sysdeps/unix/sysv/linux/sigprocmask.c (__sigprocmask): Likewise.
	* sysdeps/unix/sysv/linux/sigqueue.c (__sigqueue): Likewise.
	* sysdeps/unix/sysv/linux/sigstack.c (sigstack): Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/sigpending.c (sigpending):
	Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/sigprocmask.c
	(__sigprocmask): Likewise.
	* sysdeps/unix/sysv/linux/speed.c (cfgetospeed): Likewise.
	(cfgetispeed): Likewise.
	(cfsetospeed): Likewise.
	(cfsetispeed): Likewise.
	* sysdeps/unix/sysv/linux/tcflow.c (tcflow): Likewise.
	* sysdeps/unix/sysv/linux/tcflush.c (tcflush): Likewise.
	* sysdeps/unix/sysv/linux/tcgetattr.c (__tcgetattr): Likewise.
	* sysdeps/unix/sysv/linux/tcsetattr.c (tcsetattr): Likewise.
	* sysdeps/unix/sysv/linux/time.c (time): Likewise.
	* sysdeps/unix/sysv/linux/timer_create.c (timer_create): Likewise.
	* sysdeps/unix/sysv/linux/timer_delete.c (timer_delete): Likewise.
	* sysdeps/unix/sysv/linux/timer_getoverr.c (timer_getoverrun):
	Likewise.
	* sysdeps/unix/sysv/linux/timer_gettime.c (timer_gettime):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/sigpending.c (sigpending):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/sigprocmask.c (__sigprocmask):
	Likewise.
	* sysdeps/x86_64/backtrace.c (__backtrace): Likewise.
 2015-10-19 12:04:33 +00:00
H.J. Lu
9edf9b18b1 Mark x86 _dl_unmap/_dl_make_tlsdesc_dynamic hidden 
Since x86 _dl_unmap and _dl_make_tlsdesc_dynamic are only used
internally in ld.so, they can be made hidden.

	[BZ #19122]
	* sysdeps/i386/dl-lookupcfg.h (_dl_unmap): Add attribute_hidden.
	* sysdeps/i386/dl-tlsdesc.h (_dl_make_tlsdesc_dynamic):
	Likewise.
	* sysdeps/x86_64/dl-tlsdesc.h (_dl_make_tlsdesc_dynamic):
	Likewise.
	* sysdeps/x86_64/dl-lookupcfg.h (_dl_unmap): Likewise.
 2015-10-15 13:48:54 -07:00
Joseph Myers
b7d09f0d63 Remove assembler -mtune=i686 configure test. 
There is a configure test for assembler support for -mtune=i686.  This
option was added in binutils 2.18 so the test is obsolete; this patch
removes it.

Tested for x86 (testsuite, and that installed shared libraries are
unchanged by the patch).

	* sysdeps/i386/configure.ac (libc_cv_as_i686): Remove configure
	test.
	* sysdeps/i386/configure: Regenerated.
	* sysdeps/i386/i686/Makefile [$(config-asflags-i686) = yes]: Make
	code unconditional.
 2015-10-15 20:28:27 +00:00
Joseph Myers
ae5d8eaed0 Remove configure tests for -mno-vzeroupper support. 
GCC added support for -mno-vzeroupper in version 4.6.  Thus the
configure tests for this support are obsolete, and this patch removes
them.

Tested for x86_64 and x86 (testsuite, and that installed stripped
shared libraries are unchanged by this patch).

	* sysdeps/i386/configure.ac (libc_cv_cc_novzeroupper): Remove
	configure test.
	* sysdeps/i386/configure: Regenerated.
	* sysdeps/x86_64/configure.ac (libc_cv_cc_novzeroupper): Remove
	configure test.
	* sysdeps/x86_64/configure: Regenerated.
	* sysdeps/x86_64/Makefile [$(config-cflags-novzeroupper) = yes]:
	Make code unconditional.
 2015-10-09 16:03:48 +00:00
Joseph Myers
b7848899a5 Remove configure tests for FMA4 support. 
GCC added support for -mfma4 in version 4.5.  Thus the configure tests
for this support are obsolete, and this patch removes them.

Tested for x86_64 and x86 (testsuite, and that installed stripped
shared libraries are unchanged by this patch).

	* sysdeps/i386/configure.ac (libc_cv_cc_fma4): Remove configure
	test.
	* sysdeps/i386/configure: Regenerated.
	* sysdeps/x86_64/configure.ac (libc_cv_cc_fma4): Remove configure
	test.
	* sysdeps/x86_64/configure: Regenerated.
	* sysdeps/x86_64/fpu/multiarch/Makefile [$(have-mfma4) = yes]:
	Make code unconditional.
	* sysdeps/x86_64/fpu/multiarch/e_asin.c [HAVE_FMA4_SUPPORT]:
	Likewise.
	* sysdeps/x86_64/fpu/multiarch/e_atan2.c [HAVE_FMA4_SUPPORT]:
	Likewise.
	[!HAVE_FMA4_SUPPORT]: Remove conditional code.
	* sysdeps/x86_64/fpu/multiarch/e_exp.c [HAVE_FMA4_SUPPORT]: Make
	code unconditional.
	[!HAVE_FMA4_SUPPORT]: Remove conditional code.
	* sysdeps/x86_64/fpu/multiarch/e_log.c [HAVE_FMA4_SUPPORT]: Make
	code unconditional.
	[!HAVE_FMA4_SUPPORT]: Remove conditional code.
	* sysdeps/x86_64/fpu/multiarch/e_pow.c [HAVE_FMA4_SUPPORT]: Make
	code unconditional.
	* sysdeps/x86_64/fpu/multiarch/s_atan.c [HAVE_FMA4_SUPPORT]: Make
	code unconditional.
	[!HAVE_FMA4_SUPPORT]: Remove conditional code.
	* sysdeps/x86_64/fpu/multiarch/s_fma.c [HAVE_FMA4_SUPPORT]: Make
	code unconditional.
	[!HAVE_FMA4_SUPPORT]: Remove conditional code.
	* sysdeps/x86_64/fpu/multiarch/s_fmaf.c [HAVE_FMA4_SUPPORT]: Make
	code unconditional.
	[!HAVE_FMA4_SUPPORT]: Remove conditional code.
	* sysdeps/x86_64/fpu/multiarch/s_sin.c [HAVE_FMA4_SUPPORT]: Make
	code unconditional.
	[!HAVE_FMA4_SUPPORT]: Remove conditional code.
	* sysdeps/x86_64/fpu/multiarch/s_tan.c [HAVE_FMA4_SUPPORT]: Make
	code unconditional.
	[!HAVE_FMA4_SUPPORT]: Remove conditional code.
	* config.h.in (HAVE_FMA4_SUPPORT): Remove #undef.
 2015-10-09 16:02:54 +00:00
Joseph Myers
1b12cd7f4d Remove configure tests for AVX support. 
GCC added support for -mavx and -msse2avx in version 4.4.  Thus the
configure tests for this support are obsolete, and this patch removes
them.

Tested for x86_64 and x86 (testsuite, and that installed stripped
shared libraries are unchanged by this patch).

	* sysdeps/i386/configure.ac (libc_cv_cc_avx): Remove configure
	test.
	(libc_cv_cc_sse2avx): Likewise.
	* sysdeps/i386/configure: Regenerated.
	* sysdeps/i386/i686/multiarch/Makefile
	[$(subdir)$(config-cflags-avx) = mathyes]: Change conditional to
	[$(subdir) = math].
	* sysdeps/i386/i686/multiarch/s_fma-fma.c [HAVE_AVX_SUPPORT]: Make
	code unconditional.
	* sysdeps/i386/i686/multiarch/s_fma.c [HAVE_AVX_SUPPORT]:
	Likewise.
	* sysdeps/i386/i686/multiarch/s_fmaf-fma.c [HAVE_AVX_SUPPORT]:
	Likewise.
	* sysdeps/i386/i686/multiarch/s_fmaf.c [HAVE_AVX_SUPPORT]:
	Likewise.
	* sysdeps/x86_64/configure.ac (libc_cv_cc_avx): Remove configure
	test.
	(libc_cv_cc_sse2avx): Likewise.
	* sysdeps/x86_64/configure: Regenerated.
	* sysdeps/x86_64/Makefile [$(config-cflags-avx) = yes]: Make code
	unconditional.
	* sysdeps/x86_64/dl-trampoline.h (_dl_runtime_profile)
	[HAVE_AVX_SUPPORT || HAVE_AVX512_ASM_SUPPORT]: Make code
	unconditional.
	(_dl_runtime_profile)
	[!(HAVE_AVX_SUPPORT || HAVE_AVX512_ASM_SUPPORT)]: Remove
	conditional code.
	* sysdeps/x86_64/fpu/multiarch/Makefile
	[$(config-cflags-sse2avx) = yes]: Make code unconditional.
	* sysdeps/x86_64/fpu/multiarch/e_atan2.c
	[HAVE_FMA4_SUPPORT || HAVE_AVX_SUPPORT]: Likewise.
	* sysdeps/x86_64/fpu/multiarch/e_exp.c
	[HAVE_FMA4_SUPPORT || HAVE_AVX_SUPPORT]: Likewise.
	* sysdeps/x86_64/fpu/multiarch/e_log.c
	[HAVE_FMA4_SUPPORT || HAVE_AVX_SUPPORT]: Likewise.
	* sysdeps/x86_64/fpu/multiarch/s_atan.c
	[HAVE_FMA4_SUPPORT || HAVE_AVX_SUPPORT]: Likewise.
	* sysdeps/x86_64/fpu/multiarch/s_fma.c [HAVE_AVX_SUPPORT]:
	Likewise.
	* sysdeps/x86_64/fpu/multiarch/s_fmaf.c [HAVE_AVX_SUPPORT]:
	Likewise.
	* sysdeps/x86_64/fpu/multiarch/s_sin.c
	[HAVE_FMA4_SUPPORT || HAVE_AVX_SUPPORT]: Likewise.
	* sysdeps/x86_64/fpu/multiarch/s_tan.c
	[HAVE_FMA4_SUPPORT || HAVE_AVX_SUPPORT]: Likewise.
	* sysdeps/x86_64/multiarch/strcmp.S [HAVE_AVX_SUPPORT]: Likewise.
	* config.h.in (HAVE_AVX_SUPPORT): Remove #undef.
	(HAVE_SSE2AVX_SUPPORT): Likewise.
 2015-10-08 15:59:32 +00:00
Joseph Myers
3b7aa5bf59 Remove configure tests for SSE4 support. 
GCC added support for -msse4 in version 4.3.  Thus the configure tests
for it are obsolete, and this patch removes them.

Tested for x86_64 and x86 (testsuite, and that installed stripped
shared libraries are unchanged by this patch).

	* sysdeps/i386/configure.ac (libc_cv_cc_sse4): Remove configure
	test.
	* sysdeps/i386/configure: Regenerated.
	* sysdeps/i386/i686/multiarch/Makefile
	[$(config-cflags-sse4) = yes]: Make code unconditional.
	* sysdeps/i386/i686/multiarch/strcspn.S [HAVE_SSE4_SUPPORT]:
	Likewise.
	* sysdeps/i386/i686/multiarch/strspn.S [HAVE_SSE4_SUPPORT]:
	Likewise.
	* sysdeps/x86_64/configure.ac (libc_cv_cc_sse4): Remove configure
	test.
	* sysdeps/x86_64/configure: Regenerated.
	* sysdeps/x86_64/multiarch/Makefile [$(config-cflags-sse4) = yes]:
	Make code unconditional.
	* sysdeps/x86_64/multiarch/strcspn.S [HAVE_SSE4_SUPPORT]:
	Likewise.
	* sysdeps/x86_64/multiarch/strspn.S [HAVE_SSE4_SUPPORT]: Likewise.
	* config.h.in (HAVE_SSE4_SUPPORT): Remove #undef.
 2015-10-06 20:47:40 +00:00
Joseph Myers
59a63cca11 Fix nexttoward overflow in non-default rounding modes (bug 19059). 
ISO C requires overflowing results from nexttoward to be the
appropriate infinity independent of the rounding mode, but some
implementations use a rounding-mode-dependent result (this is the same
issue as was fixed for nextafter in bug 16677).  This patch fixes the
problem by making the nexttoward implementations discard the result
from the floating-point computation that forced an overflow exception
and then return the infinity previously computed with integer
arithmetic.

Tested for x86_64, x86, mips64 and powerpc.

	[BZ #19059]
	* math/s_nexttowardf.c (__nexttowardf): Do not return value from
	overflowing computation.
	* sysdeps/i386/fpu/s_nexttoward.c (__nexttoward): Likewise.
	* sysdeps/i386/fpu/s_nexttowardf.c (__nexttowardf): Likewise.
	* sysdeps/ieee754/ldbl-128/s_nexttoward.c (__nexttoward):
	Likewise.
	* sysdeps/ieee754/ldbl-128/s_nexttowardf.c (__nexttowardf):
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_nexttoward.c (__nexttoward):
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_nexttowardf.c (__nexttowardf):
	Likewise.
	* sysdeps/ieee754/ldbl-96/s_nexttoward.c (__nexttoward): Likewise.
	* sysdeps/ieee754/ldbl-96/s_nexttowardf.c (__nexttowardf):
	Likewise.
	* sysdeps/ieee754/ldbl-opt/s_nexttowardfd.c (__nldbl_nexttowardf):
	Likewise.
	* math/libm-test.inc (nexttoward_test_data): Add more tests.
 2015-10-02 17:11:13 +00:00
Joseph Myers
8c6c923636 Fix i386 acosh (-qNaN) spurious "invalid" exception. 
The i386 versions of acoshf and acosh raise a spurious "invalid"
exception for an argument that is a quiet NaN with the sign bit set.
The integer arithmetic to detect arguments < 1 also detects -NaN, and
then the computation 0 / 0 in that case raises the exception.  This
patch fixes this by using (x - x) / (x - x) as the computation in that
case instead, which will always raise the exception for non-NaN
arguments reaching that code, but not for quiet NaN arguments.

Tested for x86_64 and x86.

	[BZ #19032]
	* sysdeps/i386/fpu/e_acosh.S (__ieee754_acosh): For arguments < 1,
	compute result as (x - x) / (x - x) not as 0 / 0.
	* sysdeps/i386/fpu/e_acoshf.S (__ieee754_acoshf): Likewise.
	* math/libm-test.inc (acosh_test_data): Add another test of acosh.
 2015-09-30 21:44:42 +00:00
Joseph Myers
a5721ebc68 Fix clog, clog10 inaccuracy (bug 19016). 
For arguments with X^2 + Y^2 close to 1, clog and clog10 avoid large
errors from log(hypot) by computing X^2 + Y^2 - 1 in a way that avoids
cancellation error and then using log1p.

However, the thresholds for using that approach still result in log
being used on argument as large as sqrt(13/16) > 0.9, leading to
significant errors, in some cases above the 9ulp maximum allowed in
glibc libm.  This patch arranges for the approach using log1p to be
used in any cases where |X|, |Y| < 1 and X^2 + Y^2 >= 0.5 (with the
existing allowance for cases where one of X and Y is very small),
adjusting the __x2y2m1 functions to work with the wider range of
inputs.  This way, log only gets used on arguments below sqrt(1/2) (or
substantially above 1), where the error involved is much less.

Tested for x86_64, x86, mips64 and powerpc.  For the ulps regeneration
I removed the existing clog and clog10 ulps before regenerating to
allow any reduced ulps to appear.  Tests added include those found by
random test generation to produce large ulps either before or after
the patch, and some found by trying inputs close to the (0.75, 0.5)
threshold where the potential errors from using log are largest.

	[BZ #19016]
	* sysdeps/generic/math_private.h (__x2y2m1f): Update comment to
	allow more cases with X^2 + Y^2 >= 0.5.
	* sysdeps/ieee754/dbl-64/x2y2m1.c (__x2y2m1): Likewise.  Add -1 as
	normal element in sum instead of special-casing based on values of
	arguments.
	* sysdeps/ieee754/dbl-64/x2y2m1f.c (__x2y2m1f): Update comment.
	* sysdeps/ieee754/ldbl-128/x2y2m1l.c (__x2y2m1l): Likewise.  Add
	-1 as normal element in sum instead of special-casing based on
	values of arguments.
	* sysdeps/ieee754/ldbl-128ibm/x2y2m1l.c (__x2y2m1l): Likewise.
	* sysdeps/ieee754/ldbl-96/x2y2m1.c [FLT_EVAL_METHOD != 0]
	(__x2y2m1): Update comment.
	* sysdeps/ieee754/ldbl-96/x2y2m1l.c (__x2y2m1l): Likewise.  Add -1
	as normal element in sum instead of special-casing based on values
	of arguments.
	* math/s_clog.c (__clog): Handle more cases using log1p without
	hypot.
	* math/s_clog10.c (__clog10): Likewise.
	* math/s_clog10f.c (__clog10f): Likewise.
	* math/s_clog10l.c (__clog10l): Likewise.
	* math/s_clogf.c (__clogf): Likewise.
	* math/s_clogl.c (__clogl): Likewise.
	* math/auto-libm-test-in: Add more tests of clog and clog10.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2015-09-28 22:11:22 +00:00
Joseph Myers
6ace393821 Fix pow missing underflows (bug 18825). 
Similar to various other bugs in this area, pow functions can fail to
raise the underflow exception when the result is tiny and inexact but
one or more low bits of the intermediate result that is scaled down
(or, in the i386 case, converted from a wider evaluation format) are
zero.  This patch forces the exception in a similar way to previous
fixes, thereby concluding the fixes for known bugs with missing
underflow exceptions currently filed in Bugzilla.

Tested for x86_64, x86, mips64 and powerpc.

	[BZ #18825]
	* sysdeps/i386/fpu/i386-math-asm.h (FLT_NARROW_EVAL_UFLOW_NONNAN):
	New macro.
	(DBL_NARROW_EVAL_UFLOW_NONNAN): Likewise.
	(LDBL_CHECK_FORCE_UFLOW_NONNAN): Likewise.
	* sysdeps/i386/fpu/e_pow.S: Use DEFINE_DBL_MIN.
	(__ieee754_pow): Use DBL_NARROW_EVAL_UFLOW_NONNAN instead of
	DBL_NARROW_EVAL, reloading the PIC register as needed.
	* sysdeps/i386/fpu/e_powf.S: Use DEFINE_FLT_MIN.
	(__ieee754_powf): Use FLT_NARROW_EVAL_UFLOW_NONNAN instead of
	FLT_NARROW_EVAL.  Use separate return path for case when first
	argument is NaN.
	* sysdeps/i386/fpu/e_powl.S: Include <i386-math-asm.h>.  Use
	DEFINE_LDBL_MIN.
	(__ieee754_powl): Use LDBL_CHECK_FORCE_UFLOW_NONNAN, reloading the
	PIC register.
	* sysdeps/ieee754/dbl-64/e_pow.c (__ieee754_pow): Use
	math_check_force_underflow_nonneg.
	* sysdeps/ieee754/flt-32/e_powf.c (__ieee754_powf): Force
	underflow for subnormal result.
	* sysdeps/ieee754/ldbl-128/e_powl.c (__ieee754_powl): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_powl.c (__ieee754_powl): Use
	math_check_force_underflow_nonneg.
	* sysdeps/x86/fpu/powl_helper.c (__powl_helper): Use
	math_check_force_underflow.
	* sysdeps/x86_64/fpu/x86_64-math-asm.h
	(LDBL_CHECK_FORCE_UFLOW_NONNAN): New macro.
	* sysdeps/x86_64/fpu/e_powl.S: Include <x86_64-math-asm.h>.  Use
	DEFINE_LDBL_MIN.
	(__ieee754_powl): Use LDBL_CHECK_FORCE_UFLOW_NONNAN.
	* math/auto-libm-test-in: Add more tests of pow.
	* math/auto-libm-test-out: Regenerated.
 2015-09-25 22:29:10 +00:00
Joseph Myers
f6987f5aa4 Fix hypot missing underflows (bug 18803). 
Similar to various other bugs in this area, hypot functions can fail
to raise the underflow exception when the result is tiny and inexact
but one or more low bits of the intermediate result that is scaled
down (or, in the i386 case, converted from a wider evaluation format)
are zero.  This patch forces the exception in a similar way to
previous fixes.

Note that this issue cannot arise for implementations of hypotf using
double (or wider) for intermediate evaluation (if hypotf should
underflow, that means the double square root is being computed of some
number of the form N*2^-298, for 0 < N < 2^46, which is exactly
represented as a double, and whatever the rounding mode such a square
root cannot have a mantissa with all zeroes after the initial 23
bits).  Thus no changes are made to hypotf implementations in this
patch, only to hypot and hypotl.

Tested for x86_64, x86, mips64 and powerpc.

	[BZ #18803]
	* sysdeps/i386/fpu/e_hypot.S: Use DEFINE_DBL_MIN.
	(MO): New macro.
	(__ieee754_hypot) [PIC]: Load PIC register.
	(__ieee754_hypot): Use DBL_NARROW_EVAL_UFLOW_NONNEG instead of
	DBL_NARROW_EVAL.
	* sysdeps/ieee754/dbl-64/e_hypot.c (__ieee754_hypot): Use
	math_check_force_underflow_nonneg in case where result might be
	tiny.
	* sysdeps/ieee754/ldbl-128/e_hypotl.c (__ieee754_hypotl):
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_hypotl.c (__ieee754_hypotl):
	Likewise.
	* sysdeps/ieee754/ldbl-96/e_hypotl.c (__ieee754_hypotl): Likewise.
	* sysdeps/powerpc/fpu/e_hypot.c (__ieee754_hypot): Likewise.
	* math/auto-libm-test-in: Add more tests of hypot.
	* math/auto-libm-test-out: Regenerated.
 2015-09-24 23:43:57 +00:00
Joseph Myers
1a19b8894f Use LOAD_PIC_REG in i386 atanh. 
sysdeps/i386/fpu/e_atanh.S, unlike all other functions in that
directory, loads the PIC register with its own code using
_GLOBAL_OFFSET_TABLE_, rather than with the LOAD_PIC_REG macro.  I see
no good reason for the difference; this patch makes it use the common
macro.

Tested for x86.

	* sysdeps/i386/fpu/e_atanh.S (__ieee754_atanh) [PIC]: Use
	LOAD_PIC_REG.
 2015-09-24 21:48:22 +00:00
Joseph Myers
37825319ee Refactor i386 libm code forcing underflow exceptions. 
This patch refactors code in sysdeps/i386/fpu that forces underflow
exceptions to use common macros for that purpose as far as possible.
(Although some of the macros end up used in only one place, I think
it's cleanest to define all these macros together so that all the code
forcing underflow uses such macros.  Some more uses of such macros
will also be introduced when fixing remaining bugs about missing
underflow exceptions, and it would be possible to do further
refactoring of the macros in i386-math-asm.h to share more code by
using other macros internally.  Places that test for underflow by
examining the representation of the argument with integer operations,
rather that using floating-point comparisons on the argument or
result, are unchanged by this patch.)

Most of this code uses a macro MO to abstract away the differences
between PIC and non-PIC memory references to constants.  log1p
functions, however, hardcoded PIC conditionals for this.  Because the
common macros rely on the use of MO, I changed the log1p functions to
use the normal style here, and, for consistency, also made that change
to log1pl which is otherwise unaffected by this patch.

Tested for x86.

	* sysdeps/i386/fpu/i386-math-asm.h (DEFINE_LDBL_MIN): New macro.
	(FLT_CHECK_FORCE_UFLOW): Likewise.
	(DBL_CHECK_FORCE_UFLOW): Likewise.
	(FLT_CHECK_FORCE_UFLOW_NARROW): Likewise.
	(DBL_CHECK_FORCE_UFLOW_NARROW): Likewise.
	(LDBL_CHECK_FORCE_UFLOW_NONNEG_NAN): Likewise.
	(FLT_CHECK_FORCE_UFLOW_NONNAN): Likewise.
	(DBL_CHECK_FORCE_UFLOW_NONNAN): Likewise.
	(FLT_CHECK_FORCE_UFLOW_NONNEG): Likewise.
	(DBL_CHECK_FORCE_UFLOW_NONNEG): Likewise.
	(LDBL_CHECK_FORCE_UFLOW_NONNEG): Likewise.
	* sysdeps/i386/fpu/e_asin.S: Include <i386-math-asm.h>.
	(dbl_min): Replace with use of DEFINE_DBL_MIN.
	(__ieee754_asin): Use DBL_CHECK_FORCE_UFLOW.
	* sysdeps/i386/fpu/e_asinf.S: Include <i386-math-asm.h>.
	(flt_min): Replace with use of DEFINE_FLT_MIN.
	(__ieee754_asinf): Use FLT_CHECK_FORCE_UFLOW.
	* sysdeps/i386/fpu/e_atan2.S: Include <i386-math-asm.h>.
	(dbl_min): Replace with use of DEFINE_DBL_MIN.
	(__ieee754_atan2): Use DBL_CHECK_FORCE_UFLOW_NARROW.
	* sysdeps/i386/fpu/e_atan2f.S: Include <i386-math-asm.h>.
	(flt_min): Replace with use of DEFINE_FLT_MIN.
	(__ieee754_atan2f): Use FLT_CHECK_FORCE_UFLOW_NARROW.
	* sysdeps/i386/fpu/e_atanh.S: Include <i386-math-asm.h>.
	(dbl_min): Replace with use of DEFINE_DBL_MIN.
	(__ieee754_atanh): Use DBL_CHECK_FORCE_UFLOW_NONNEG.
	* sysdeps/i386/fpu/e_atanhf.S: Include <i386-math-asm.h>.
	(flt_min): Replace with use of DEFINE_FLT_MIN.
	(__ieee754_atanhf): Use FLT_CHECK_FORCE_UFLOW_NONNEG.
	* sysdeps/i386/fpu/e_exp2l.S: Include <i386-math-asm.h>.
	(ldbl_min): Replace with use of DEFINE_LDBL_MIN.
	(__ieee754_exp2l): Use LDBL_CHECK_FORCE_UFLOW_NONNEG_NAN.
	* sysdeps/i386/fpu/e_expl.S: Include <i386-math-asm.h>.
	[!USE_AS_EXPM1L] (cmin): Replace with use of DEFINE_LDBL_MIN.
	(IEEE754_EXPL): Use LDBL_CHECK_FORCE_UFLOW_NONNEG.
	* sysdeps/i386/fpu/s_atan.S: Include <i386-math-asm.h>.
	(dbl_min): Replace with use of DEFINE_DBL_MIN.
	(__atan): Use DBL_CHECK_FORCE_UFLOW.
	* sysdeps/i386/fpu/s_atanf.S: Include <i386-math-asm.h>.
	(flt_min): Replace with use of DEFINE_FLT_MIN.
	(__atanf): Use FLT_CHECK_FORCE_UFLOW.
	* sysdeps/i386/fpu/s_expm1.S: Include <i386-math-asm.h>.
	(dbl_min): Replace with use of DEFINE_DBL_MIN.
	(__expm1): Use DBL_CHECK_FORCE_UFLOW.  Move underflow check after
	main computation.
	* sysdeps/i386/fpu/s_expm1f.S: Include <i386-math-asm.h>.
	(flt_min): Replace with use of DEFINE_FLT_MIN.
	(__expm1f): Use FLT_CHECK_FORCE_UFLOW.  Move underflow check after
	main computation.
	* sysdeps/i386/fpu/s_log1p.S: Include <i386-math-asm.h>.
	(dbl_min): Replace with use of DEFINE_DBL_MIN.
	(MO): New macro.
	(__log1p): Use MO.  Use DBL_CHECK_FORCE_UFLOW_NONNAN.
	* sysdeps/i386/fpu/s_log1pf.S: Include <i386-math-asm.h>.
	(flt_min): Replace with use of DEFINE_FLT_MIN.
	(MO): New macro.
	(__log1pf): Use MO.  Use FLT_CHECK_FORCE_UFLOW_NONNAN.
	* sysdeps/i386/fpu/s_log1pl.S (MO): New macro.
	(__log1pl): Use MO.
 2015-09-24 21:41:00 +00:00
Joseph Myers
54142c44e9 Use math_narrow_eval more consistently. 
Where glibc code needs to avoid excess range and precision in
floating-point arithmetic, code variously uses either asms or volatile
to force the results of that arithmetic to memory; mostly this is
conditional on FLT_EVAL_METHOD, but in the case of lrint / llrint
functions some use of volatile is unconditional (and is present
unnecessarily in versions for long double).  This patch make such code
use the recently-added math_narrow_eval macro consistently, removing
the unnecessary uses of volatile in long double lrint / llrint
implementations completely.

Tested for x86_64, x86, mips64 and powerpc.

	* math/s_nexttowardf.c (__nexttowardf): Use math_narrow_eval.
	* stdlib/strtod_l.c: Include <math_private.h>.
	(overflow_value): Use math_narrow_eval.
	(underflow_value): Likewise.
	* sysdeps/i386/fpu/s_nexttoward.c (__nexttoward): Likewise.
	* sysdeps/i386/fpu/s_nexttowardf.c (__nexttowardf): Likewise.
	* sysdeps/ieee754/dbl-64/e_gamma_r.c (gamma_positive): Likewise.
	(__ieee754_gamma_r): Likewise.
	* sysdeps/ieee754/dbl-64/gamma_productf.c (__gamma_productf):
	Likewise.
	* sysdeps/ieee754/dbl-64/k_rem_pio2.c (__kernel_rem_pio2):
	Likewise.
	* sysdeps/ieee754/dbl-64/lgamma_neg.c (__lgamma_neg): Likewise.
	* sysdeps/ieee754/dbl-64/s_erf.c (__erfc): Likewise.
	* sysdeps/ieee754/dbl-64/s_llrint.c (__llrint): Likewise.
	* sysdeps/ieee754/dbl-64/s_lrint.c (__lrint): Likewise.
	* sysdeps/ieee754/flt-32/e_gammaf_r.c (gammaf_positive): Likewise.
	(__ieee754_gammaf_r): Likewise.
	* sysdeps/ieee754/flt-32/k_rem_pio2f.c (__kernel_rem_pio2f):
	Likewise.
	* sysdeps/ieee754/flt-32/lgamma_negf.c (__lgamma_negf): Likewise.
	* sysdeps/ieee754/flt-32/s_erff.c (__erfcf): Likewise.
	* sysdeps/ieee754/flt-32/s_llrintf.c (__llrintf): Likewise.
	* sysdeps/ieee754/flt-32/s_lrintf.c (__lrintf): Likewise.
	* sysdeps/ieee754/ldbl-128/s_llrintl.c (__llrintl): Do not use
	volatile.
	* sysdeps/ieee754/ldbl-128/s_lrintl.c (__lrintl): Likewise.
	* sysdeps/ieee754/ldbl-128/s_nexttoward.c (__nexttoward): Use
	math_narrow_eval.
	* sysdeps/ieee754/ldbl-128ibm/s_nexttoward.c (__nexttoward):
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_nexttowardf.c (__nexttowardf):
	Likewise.
	* sysdeps/ieee754/ldbl-96/gamma_product.c (__gamma_product):
	Likewise.
	* sysdeps/ieee754/ldbl-96/s_llrintl.c (__llrintl): Do not use
	volatile.
	* sysdeps/ieee754/ldbl-96/s_lrintl.c (__lrintl): Likewise.
	* sysdeps/ieee754/ldbl-96/s_nexttoward.c (__nexttoward): Use
	math_narrow_eval.
	* sysdeps/ieee754/ldbl-96/s_nexttowardf.c (__nexttowardf):
	Likewise.
	* sysdeps/ieee754/ldbl-opt/s_nexttowardfd.c (__nldbl_nexttowardf):
	Likewise.
 2015-09-23 18:14:57 +00:00
Joseph Myers
6f0f237bf5 Avoid excess range in results from i386 exp, hypot, pow functions (bug 18980). 
i386 exp, hypot and pow functions can return overflowing and
underflowing values with excess range and precision; ; Wilco
Dijkstra's patches to make isfinite etc. expand inline cause this
pre-existing issue to result in test failures.

This patch fixes those functions to avoid excess range and precision
in their return values.  Appropriate macros are added for the repeated
code sequences; in future I'll add more such macros and refactor
existing code forcing underflow (with or without also eliminating
excess range and precision from the return value) to use such macros.

Tested for x86.  If, after this patch, you still see x86 libm test
failures with excess range or precision, please file bugs in Bugzilla.

	[BZ #18980]
	* sysdeps/i386/fpu/i386-math-asm.h (DEFINE_FLT_MIN): New macro.
	(DEFINE_DBL_MIN): Likewise.
	(FLT_NARROW_EVAL_UFLOW_NONNEG_NAN): Likewise.
	(DBL_NARROW_EVAL_UFLOW_NONNEG_NAN): Likewise.
	(FLT_NARROW_EVAL_UFLOW_NONNEG): Likewise.
	(DBL_NARROW_EVAL_UFLOW_NONNEG): Likewise.
	* sysdeps/i386/fpu/e_exp.S: Include <i386-math-asm.h>.
	(dbl_min): Replace with use of DEFINE_DBL_MIN.
	(__ieee754_exp): Use DBL_NARROW_EVAL_UFLOW_NONNEG_NAN.
	(__exp_finite): Use DBL_NARROW_EVAL_UFLOW_NONNEG.
	* sysdeps/i386/fpu/e_exp10.S: Include <i386-math-asm.h>.
	(dbl_min): Replace with use of DEFINE_DBL_MIN.
	(__ieee754_exp10): Use DBL_NARROW_EVAL_UFLOW_NONNEG_NAN.
	* sysdeps/i386/fpu/e_exp10f.S: Include <i386-math-asm.h>.
	(flt_min): Replace with use of DEFINE_FLT_MIN.
	(__ieee754_exp10f): Use FLT_NARROW_EVAL_UFLOW_NONNEG_NAN.
	* sysdeps/i386/fpu/e_exp2.S: Include <i386-math-asm.h>.
	(dbl_min): Replace with use of DEFINE_DBL_MIN.
	(__ieee754_exp2): Use DBL_NARROW_EVAL_UFLOW_NONNEG_NAN.
	* sysdeps/i386/fpu/e_exp2f.S: Include <i386-math-asm.h>.
	(flt_min): Replace with use of DEFINE_FLT_MIN.
	(__ieee754_exp2f): Use FLT_NARROW_EVAL_UFLOW_NONNEG_NAN.
	* sysdeps/i386/fpu/e_expf.S: Include <i386-math-asm.h>.
	(flt_min): Replace with use of DEFINE_FLT_MIN.
	(__ieee754_expf): Use FLT_NARROW_EVAL_UFLOW_NONNEG_NAN.
	(__expf_finite): Use FLT_NARROW_EVAL_UFLOW_NONNEG.
	* sysdeps/i386/fpu/e_hypot.S: Include <i386-math-asm.h>.
	(__ieee754_hypot): Use DBL_NARROW_EVAL.
	* sysdeps/i386/fpu/e_hypotf.S: Include <i386-math-asm.h>.
	(__ieee754_hypotf): Use FLT_NARROW_EVAL.
	* sysdeps/i386/fpu/e_pow.S: Include <i386-math-asm.h>.
	(__ieee754_pow): Use DBL_NARROW_EVAL.
	* sysdeps/i386/fpu/e_powf.S: Include <i386-math-asm.h>.
	(__ieee754_powf): Use FLT_NARROW_EVAL.
	* sysdeps/i386/i686/fpu/multiarch/e_expf-sse2.S
	(__ieee754_expf_sse2): Convert double-precision result to single
	precision.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
 2015-09-18 21:53:22 +00:00
Joseph Myers
94ced920a9 Avoid excess range in results from i386 scalb functions (bug 18981). 
i386 scalb / scalbn / scalbln (and thus ldexp) functions for float and
double can return results with excess range (and consequently excess
precision for subnormal results).  As the results of these functions
are fully determined by reference to IEEE 754 operations, this is
unambiguously a bug, apart from the testsuite failures it causes.

This patch makes those functions store their results on the stack and
load them back to eliminate the excess range.  Double rounding is not
a problem, as the only cases where it could occur are when the result
overflows or underflows for extended precision, and then the
double-rounded results are the same as the single-rounded results.

The new macros will be used for more functions, more such macros
added, and existing code refactored to use such macros, in subsequent
patches.

Tested for x86.  Committed.

	[BZ #18981]
	* sysdeps/i386/fpu/i386-math-asm.h: New file.
	* sysdeps/i386/fpu/e_scalb.S: Include <i386-math-asm.h>.
	(__ieee754_scalb): Use DBL_NARROW_EVAL.
	* sysdeps/i386/fpu/e_scalbf.S: Include <i386-math-asm.h>.
	(__ieee754_scalbf): Use FLT_NARROW_EVAL.
	* sysdeps/i386/fpu/s_scalbn.S: Include <i386-math-asm.h>.
	(__scalbn): Use DBL_NARROW_EVAL.
	* sysdeps/i386/fpu/s_scalbnf.S: Include <i386-math-asm.h>.
	(__scalbnf): Use FLT_NARROW_EVAL.
 2015-09-18 20:34:59 +00:00
Joseph Myers
da2f4f2dd5 Make scalbn set errno (bug 6803). 
As noted in bug 6803, scalbn fails to set errno on overflow and
underflow.  This patch fixes this by making scalbn an alias of ldexp,
which has exactly the same semantics (for floating-point types with
radix 2) and already has wrappers that deal with setting errno,
instead of an alias of the internal __scalbn (which ldexp calls).

Notes:

* Where compat symbols were defined for scalbn functions, I didn't
  change what they point to (to keep the patch minimal), so such
  compat symbols continue to go directly to the non-errno-setting
  functions.

* Mike, I didn't do anything with the IA64 versions of these
  functions, where I think both the ldexp and scalbn functions already
  deal with setting errno.  As a cleanup (not needed to fix this bug)
  however you might want to make those functions into aliases for
  IA64; there is no need for them to be separate function
  implementations at all.

* This concludes the fix for bug 6803 since the scalb and scalbln
  cases of that bug were fixed some time ago.

Tested for x86_64, x86, mips64 and powerpc.

	[BZ #6803]
	* math/s_ldexp.c (scalbn): Define as weak alias of __ldexp.
	[NO_LONG_DOUBLE] (scalbnl): Define as weak alias of __ldexp.
	* math/s_ldexpf.c (scalbnf): Define as weak alias of __ldexpf.
	* math/s_ldexpl.c (scalbnl): Define as weak alias of __ldexpl.
	* sysdeps/i386/fpu/s_scalbn.S (scalbn): Remove alias.
	* sysdeps/i386/fpu/s_scalbnf.S (scalbnf): Likewise.
	* sysdeps/i386/fpu/s_scalbnl.S (scalbnl): Likewise.
	* sysdeps/ieee754/dbl-64/s_scalbn.c (scalbn): Likewise.
	[NO_LONG_DOUBLE] (scalbnl): Likewise.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_scalbn.c (scalbn):
	Likewise.
	[NO_LONG_DOUBLE] (scalbnl): Likewise.
	* sysdeps/ieee754/flt-32/s_scalbnf.c (scalbnf): Likewise.
	* sysdeps/ieee754/ldbl-128/s_scalbnl.c (scalbnl): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_scalbnl.c (scalbnl): Remove
	long_double_symbol calls.
	* sysdeps/ieee754/ldbl-64-128/s_scalbnl.c (scalbnl): Likewise.
	* sysdeps/ieee754/ldbl-opt/s_ldexpl.c (__ldexpl_2): Define as
	strong alias of __ldexpl.
	(scalbnl): Define using long_double_symbol.
	* sysdeps/m68k/m680x0/fpu/s_scalbn.c (__CONCATX(scalbn,suffix)):
	Remove alias.
	* sysdeps/sparc/sparc64/soft-fp/s_scalbnl.c (scalbnl): Likewise.
	* sysdeps/x86_64/fpu/s_scalbnl.S (scalbnl): Likewise.
	* math/libm-test.inc (scalbn_test_data): Add errno expectations.
	(scalbln_test_data): Add more errno expectations.
 2015-09-16 21:11:00 +00:00
Joseph Myers
828bf6828b Fix i386 exp10 missing underflows (bug 18966). 
On i386, the double version of exp10 can miss underflow exceptions if
the result is in the subnormal range for double but the last 11 bits
of the 64-bit extended-precision mantissa happen to be zero.  This
patch forces the exception in a similar way to previous fixes.

As with the exp2 and exp fixes, the exp10f changes may in fact not be
needed to ensure underflow exceptions, but are included for
consistency and to fix the exp10 part of bug 18875 by ensuring that
excess range and precision is removed from underflowing return values.

Tested for x86_64 and x86.

	[BZ #18875]
	[BZ #18966]
	* sysdeps/i386/fpu/e_exp10.S (dbl_min): New object.
	(MO): New macro.
	(__ieee754_exp10): For small results, force underflow exception
	and remove excess range and precision from return value.
	* sysdeps/i386/fpu/e_exp10f.S (flt_min): New object.
	(MO): New macro.
	(__ieee754_exp10f): For small results, force underflow exception
	and remove excess range and precision from return value.
	* math/auto-libm-test-in: Add more tests of exp10.
	* math/auto-libm-test-out: Regenerated.
 2015-09-15 16:50:02 +00:00
Joseph Myers
de5e81691c Fix i386 exp missing underflows (bug 18961). 
On i386, the double version of exp can miss underflow exceptions if
the result is in the subnormal range for double but the last 11 bits
of the 64-bit extended-precision mantissa happen to be zero.  This
patch forces the exception in a similar way to previous fixes.

As with the exp2 fixes, the expf changes may in fact not be needed to
ensure underflow exceptions, but are included for consistency and to
fix the exp part of bug 18875 by ensuring that excess range and
precision is removed from underflowing return values.

Tested for x86_64 and x86.

	[BZ #18875]
	[BZ #18961]
	* sysdeps/i386/fpu/e_exp.S (dbl_min): New object.
	(MO): New macro.
	(__ieee754_exp): For small results, force underflow exception and
	remove excess range and precision from return value.
	(__exp_finite): Likewise.
	* sysdeps/i386/fpu/e_expf.S (flt_min): New object.
	(MO): New macro.
	(__ieee754_expf): For small results, force underflow exception and
	remove excess range and precision from return value.
	(__expf_finite): Likewise.
	* math/auto-libm-test-in: Add more tests of exp.
	* math/auto-libm-test-out: Regenerated.
 2015-09-14 22:40:05 +00:00
Joseph Myers
903af5af9a Fix exp2 missing underflows (bug 16521). 
Various exp2 implementations in glibc can miss underflow exceptions
when the scaling down part of the calculation is exact (or, in the x86
case, when the conversion from extended precision to the target
precision is exact).  This patch forces the exception in a similar way
to previous fixes.

The x86 exp2f changes may in fact not be needed for this purpose -
it's likely to be the case that no argument of type float has an exp2
result so close to an exact subnormal float value that it equals that
value when rounded to 64 bits (even taking account of variation
between different x86 implementations).  However, they are included
for consistency with the changes to exp2 and so as to fix the exp2f
part of bug 18875 by ensuring that excess range and precision is
removed from underflowing return values.

Tested for x86_64, x86 and mips64.

	[BZ #16521]
	[BZ #18875]
	* math/e_exp2l.c (__ieee754_exp2l): Force underflow exception for
	small results.
	* sysdeps/i386/fpu/e_exp2.S (dbl_min): New object.
	(MO): New macro.
	(__ieee754_exp2): For small results, force underflow exception and
	remove excess range and precision from return value.
	* sysdeps/i386/fpu/e_exp2f.S (flt_min): New object.
	(MO): New macro.
	(__ieee754_exp2f): For small results, force underflow exception
	and remove excess range and precision from return value.
	* sysdeps/i386/fpu/e_exp2l.S (ldbl_min): New object.
	(MO): New macro.
	(__ieee754_exp2l): Force underflow exception for small results.
	* sysdeps/ieee754/dbl-64/e_exp2.c (__ieee754_exp2): Likewise.
	* sysdeps/ieee754/flt-32/e_exp2f.c (__ieee754_exp2f): Likewise.
	* sysdeps/x86_64/fpu/e_exp2l.S (ldbl_min): New object.
	(MO): New macro.
	(__ieee754_exp2l): Force underflow exception for small results.
	* math/auto-libm-test-in: Add more tests or exp2.
	* math/auto-libm-test-out: Regenerated.
 2015-09-14 22:00:12 +00:00
Joseph Myers
a1f99ba28b Add more random libm test inputs (mainly for ldbl-128). 
This patch adds more libm test inputs found through random test
generation to increase previously known ulps.  This particular test
generation was run for mips64, so most of the increased ulps are for
ldbl-128 (float and double having been fairly well covered by such
testing for x86_64), but there's the odd ulps increase for other
formats.

Tested for x86_64, x86 and mips64.

	* math/auto-libm-test-in: Add more tests of acos, acosh, asin,
	asinh, atan, atan2, atanh, cabs, carg, cos, csqrt, erfc, exp,
	exp10, exp2, log, log1p, log2, pow, sin, sincos, sinh, tan and
	tanh.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/mips/mips32/libm-test-ulps: Likewise.
	* sysdeps/mips/mips64/libm-test-ulps: Likewise.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2015-09-12 00:01:38 +00:00
Joseph Myers
de071d199a Move bits/atomic.h to atomic-machine.h (bug 14912). 
It was noted in
<https://sourceware.org/ml/libc-alpha/2012-09/msg00305.html> that the
bits/*.h naming scheme should only be used for installed headers.
This patch renames bits/atomic.h to atomic-machine.h to follow that
convention.

This is the only change in this series that needs to change the
filename rather than simply removing a directory level (because both
atomic.h and bits/atomic.h exist at present).

Tested for x86_64 (testsuite, and that installed stripped shared
libraries are unchanged by the patch).

	[BZ #14912]
	* sysdeps/aarch64/bits/atomic.h: Move to ...
	* sysdeps/aarch64/atomic-machine.h: ...here.
	(_AARCH64_BITS_ATOMIC_H): Rename macro to
	_AARCH64_ATOMIC_MACHINE_H.
	* sysdeps/alpha/bits/atomic.h: Move to ...
	* sysdeps/alpha/atomic-machine.h: ...here.
	* sysdeps/arm/bits/atomic.h: Move to ...
	* sysdeps/arm/atomic-machine.h: ...here.  Update comments.
	* bits/atomic.h: Move to ...
	* sysdeps/generic/atomic-machine.h: ...here.
	(_BITS_ATOMIC_H): Rename macro to _ATOMIC_MACHINE_H.
	* sysdeps/i386/bits/atomic.h: Move to ...
	* sysdeps/i386/atomic-machine.h: ...here.
	* sysdeps/ia64/bits/atomic.h: Move to ...
	* sysdeps/ia64/atomic-machine.h: ...here.
	* sysdeps/m68k/coldfire/bits/atomic.h: Move to ...
	* sysdeps/m68k/coldfire/atomic-machine.h: ...here.
	(_BITS_ATOMIC_H): Rename macro to _ATOMIC_MACHINE_H.
	* sysdeps/m68k/m680x0/m68020/bits/atomic.h: Move to ...
	* sysdeps/m68k/m680x0/m68020/atomic-machine.h: ...here.
	* sysdeps/microblaze/bits/atomic.h: Move to ...
	* sysdeps/microblaze/atomic-machine.h: ...here.
	* sysdeps/mips/bits/atomic.h: Move to ...
	* sysdeps/mips/atomic-machine.h: ...here.
	(_MIPS_BITS_ATOMIC_H): Rename macro to _MIPS_ATOMIC_MACHINE_H.
	* sysdeps/powerpc/bits/atomic.h: Move to ...
	* sysdeps/powerpc/atomic-machine.h: ...here.  Update comments.
	* sysdeps/powerpc/powerpc32/bits/atomic.h: Move to ...
	* sysdeps/powerpc/powerpc32/atomic-machine.h: ...here.  Update
	comments.  Include <atomic-machine.h> instead of <bits/atomic.h>.
	* sysdeps/powerpc/powerpc64/bits/atomic.h: Move to ...
	* sysdeps/powerpc/powerpc64/atomic-machine.h: ...here.  Include
	<atomic-machine.h> instead of <bits/atomic.h>.
	* sysdeps/s390/bits/atomic.h: Move to ...
	* sysdeps/s390/atomic-machine.h: ...here.
	* sysdeps/sparc/sparc32/bits/atomic.h: Move to ...
	* sysdeps/sparc/sparc32/atomic-machine.h: ...here.
	(_BITS_ATOMIC_H): Rename macro to _ATOMIC_MACHINE_H.
	* sysdeps/sparc/sparc32/sparcv9/bits/atomic.h: Move to ...
	* sysdeps/sparc/sparc32/sparcv9/atomic-machine.h: ...here.
	* sysdeps/sparc/sparc64/bits/atomic.h: Move to ...
	* sysdeps/sparc/sparc64/atomic-machine.h: ...here.
	* sysdeps/tile/bits/atomic.h: Move to ...
	* sysdeps/tile/atomic-machine.h: ...here.
	* sysdeps/tile/tilegx/bits/atomic.h: Move to ...
	* sysdeps/tile/tilegx/atomic-machine.h: ...here.  Include
	<sysdeps/tile/atomic-machine.h> instead of
	<sysdeps/tile/bits/atomic.h>.
	(_BITS_ATOMIC_H): Rename macro to _ATOMIC_MACHINE_H.
	* sysdeps/tile/tilepro/bits/atomic.h: Move to ...
	* sysdeps/tile/tilepro/atomic-machine.h: ...here.  Include
	<sysdeps/tile/atomic-machine.h> instead of
	<sysdeps/tile/bits/atomic.h>.
	(_BITS_ATOMIC_H): Rename macro to _ATOMIC_MACHINE_H.
	* sysdeps/unix/sysv/linux/arm/bits/atomic.h: Move to ...
	* sysdeps/unix/sysv/linux/arm/atomic-machine.h: ...here.  Include
	<sysdeps/arm/atomic-machine.h> instead of
	<sysdeps/arm/bits/atomic.h>.
	* sysdeps/unix/sysv/linux/hppa/bits/atomic.h: Move to ...
	* sysdeps/unix/sysv/linux/hppa/atomic-machine.h: ...here.
	(_BITS_ATOMIC_H): Rename macro to _ATOMIC_MACHINE_H.
	* sysdeps/unix/sysv/linux/m68k/coldfire/bits/atomic.h: Move to ...
	* sysdeps/unix/sysv/linux/m68k/coldfire/atomic-machine.h: ...here.
	(_BITS_ATOMIC_H): Rename macro to _ATOMIC_MACHINE_H.
	* sysdeps/unix/sysv/linux/nios2/bits/atomic.h: Move to ...
	* sysdeps/unix/sysv/linux/nios2/atomic-machine.h: ...here.
	(_NIOS2_BITS_ATOMIC_H): Rename macro to _NIOS2_ATOMIC_MACHINE_H.
	* sysdeps/unix/sysv/linux/sh/bits/atomic.h: Move to ...
	* sysdeps/unix/sysv/linux/sh/atomic-machine.h: ...here.
	* sysdeps/x86_64/bits/atomic.h: Move to ...
	* sysdeps/x86_64/atomic-machine.h: ...here.
	* include/atomic.h: Include <atomic-machine.h> instead of
	<bits/atomic.h>.
 2015-09-11 20:00:19 +00:00
Joseph Myers
00a7073c38 Add more randomly-generated libm tests. 
This patch adds more libm test inputs found through random test
generation to increase observed ulps on x86_64.

Tested for x86_64 and x86.

	* math/auto-libm-test-in: Add more tests of acosh, atanh, cbrt,
	cosh, csqrt, erfc, expm1 and lgamma.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2015-09-11 15:03:10 +00:00
Joseph Myers
050f29c188 Fix lgamma (negative) inaccuracy (bug 2542, bug 2543, bug 2558). 
The existing implementations of lgamma functions (except for the ia64
versions) use the reflection formula for negative arguments.  This
suffers large inaccuracy from cancellation near zeros of lgamma (near
where the gamma function is +/- 1).

This patch fixes this inaccuracy.  For arguments above -2, there are
no zeros and no large cancellation, while for sufficiently large
negative arguments the zeros are so close to integers that even for
integers +/- 1ulp the log(gamma(1-x)) term dominates and cancellation
is not significant.  Thus, it is only necessary to take special care
about cancellation for arguments around a limited number of zeros.

Accordingly, this patch uses precomputed tables of relevant zeros,
expressed as the sum of two floating-point values.  The log of the
ratio of two sines can be computed accurately using log1p in cases
where log would lose accuracy.  The log of the ratio of two gamma(1-x)
values can be computed using Stirling's approximation (the difference
between two values of that approximation to lgamma being computable
without computing the two values and then subtracting), with
appropriate adjustments (which don't reduce accuracy too much) in
cases where 1-x is too small to use Stirling's approximation directly.

In the interval from -3 to -2, using the ratios of sines and of
gamma(1-x) can still produce too much cancellation between those two
parts of the computation (and that interval is also the worst interval
for computing the ratio between gamma(1-x) values, which computation
becomes more accurate, while being less critical for the final result,
for larger 1-x).  Because this can result in errors slightly above
those accepted in glibc, this interval is instead dealt with by
polynomial approximations.  Separate polynomial approximations to
(|gamma(x)|-1)(x-n)/(x-x0) are used for each interval of length 1/8
from -3 to -2, where n (-3 or -2) is the nearest integer to the
1/8-interval and x0 is the zero of lgamma in the relevant half-integer
interval (-3 to -2.5 or -2.5 to -2).

Together, the two approaches are intended to give sufficient accuracy
for all negative arguments in the problem range.  Outside that range,
the previous implementation continues to be used.

Tested for x86_64, x86, mips64 and powerpc.  The mips64 and powerpc
testing shows up pre-existing problems for ldbl-128 and ldbl-128ibm
with large negative arguments giving spurious "invalid" exceptions
(exposed by newly added tests for cases this patch doesn't affect the
logic for); I'll address those problems separately.

	[BZ #2542]
	[BZ #2543]
	[BZ #2558]
	* sysdeps/ieee754/dbl-64/e_lgamma_r.c (__ieee754_lgamma_r): Call
	__lgamma_neg for arguments from -28.0 to -2.0.
	* sysdeps/ieee754/flt-32/e_lgammaf_r.c (__ieee754_lgammaf_r): Call
	__lgamma_negf for arguments from -15.0 to -2.0.
	* sysdeps/ieee754/ldbl-128/e_lgammal_r.c (__ieee754_lgammal_r):
	Call __lgamma_negl for arguments from -48.0 or -50.0 to -2.0.
	* sysdeps/ieee754/ldbl-96/e_lgammal_r.c (__ieee754_lgammal_r):
	Call __lgamma_negl for arguments from -33.0 to -2.0.
	* sysdeps/ieee754/dbl-64/lgamma_neg.c: New file.
	* sysdeps/ieee754/dbl-64/lgamma_product.c: Likewise.
	* sysdeps/ieee754/flt-32/lgamma_negf.c: Likewise.
	* sysdeps/ieee754/flt-32/lgamma_productf.c: Likewise.
	* sysdeps/ieee754/ldbl-128/lgamma_negl.c: Likewise.
	* sysdeps/ieee754/ldbl-128/lgamma_productl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/lgamma_negl.c: Likewise.
	* sysdeps/ieee754/ldbl-128ibm/lgamma_productl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/lgamma_negl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/lgamma_product.c: Likewise.
	* sysdeps/ieee754/ldbl-96/lgamma_productl.c: Likewise.
	* sysdeps/generic/math_private.h (__lgamma_negf): New prototype.
	(__lgamma_neg): Likewise.
	(__lgamma_negl): Likewise.
	(__lgamma_product): Likewise.
	(__lgamma_productl): Likewise.
	* math/Makefile (libm-calls): Add lgamma_neg and lgamma_product.
	* math/auto-libm-test-in: Add more tests of lgamma.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2015-09-10 22:27:58 +00:00
Joseph Myers
ec999b8e5e Move bits/libc-lock.h and bits/libc-lockP.h out of bits/ (bug 14912). 
It was noted in
<https://sourceware.org/ml/libc-alpha/2012-09/msg00305.html> that the
bits/*.h naming scheme should only be used for installed headers.
This patch renames bits/libc-lock.h to plain libc-lock.h and
bits/libc-lockP.h to plain libc-lockP.h to follow that convention.

Note that I don't know where libc-lockP.h comes from for Hurd (the
Hurd libc-lock.h includes libc-lockP.h, but the only libc-lockP.h in
the glibc source tree is for NPTL) - some unmerged patch? - but I
updated the #include in the Hurd libc-lock.h anyway.

Tested for x86_64 (testsuite, and that installed stripped shared
libraries are unchanged by the patch).

	[BZ #14912]
	* bits/libc-lock.h: Move to ...
	* sysdeps/generic/libc-lock.h: ...here.
	(_BITS_LIBC_LOCK_H): Rename macro to _LIBC_LOCK_H.
	* sysdeps/mach/hurd/bits/libc-lock.h: Move to ...
	* sysdeps/mach/hurd/libc-lock.h: ...here.
	(_BITS_LIBC_LOCK_H): Rename macro to _LIBC_LOCK_H.
	[_LIBC]: Include <libc-lockP.h> instead of <bits/libc-lockP.h>.
	* sysdeps/mach/bits/libc-lock.h: Move to ...
	* sysdeps/mach/libc-lock.h: ...here.
	(_BITS_LIBC_LOCK_H): Rename macro to _LIBC_LOCK_H.
	* sysdeps/nptl/bits/libc-lock.h: Move to ...
	* sysdeps/nptl/libc-lock.h: ...here.
	(_BITS_LIBC_LOCK_H): Rename macro to _LIBC_LOCK_H.
	* sysdeps/nptl/bits/libc-lockP.h: Move to ...
	* sysdeps/nptl/libc-lockP.h: ...here.
	(_BITS_LIBC_LOCKP_H): Rename macro to _LIBC_LOCKP_H.
	* crypt/crypt_util.c: Include <libc-lock.h> instead of
	<bits/libc-lock.h>.
	* dirent/scandir-tail.c: Likewise.
	* dlfcn/dlerror.c: Likewise.
	* elf/dl-close.c: Likewise.
	* elf/dl-iteratephdr.c: Likewise.
	* elf/dl-lookup.c: Likewise.
	* elf/dl-open.c: Likewise.
	* elf/dl-support.c: Likewise.
	* elf/dl-writev.h: Likewise.
	* elf/rtld.c: Likewise.
	* grp/fgetgrent.c: Likewise.
	* gshadow/fgetsgent.c: Likewise.
	* gshadow/sgetsgent.c: Likewise.
	* iconv/gconv_conf.c: Likewise.
	* iconv/gconv_db.c: Likewise.
	* iconv/gconv_dl.c: Likewise.
	* iconv/gconv_int.h: Likewise.
	* iconv/gconv_trans.c: Likewise.
	* include/link.h: Likewise.
	* inet/getnameinfo.c: Likewise.
	* inet/getnetgrent.c: Likewise.
	* inet/getnetgrent_r.c: Likewise.
	* intl/bindtextdom.c: Likewise.
	* intl/dcigettext.c: Likewise.
	* intl/finddomain.c: Likewise.
	* intl/gettextP.h: Likewise.
	* intl/loadmsgcat.c: Likewise.
	* intl/localealias.c: Likewise.
	* intl/textdomain.c: Likewise.
	* libidn/idn-stub.c: Likewise.
	* libio/libioP.h: Likewise.
	* locale/duplocale.c: Likewise.
	* locale/freelocale.c: Likewise.
	* locale/newlocale.c: Likewise.
	* locale/setlocale.c: Likewise.
	* login/getutent_r.c: Likewise.
	* login/getutid_r.c: Likewise.
	* login/getutline_r.c: Likewise.
	* login/utmp-private.h: Likewise.
	* login/utmpname.c: Likewise.
	* malloc/mtrace.c: Likewise.
	* misc/efgcvt.c: Likewise.
	* misc/error.c: Likewise.
	* misc/fstab.c: Likewise.
	* misc/getpass.c: Likewise.
	* misc/mntent.c: Likewise.
	* misc/syslog.c: Likewise.
	* nis/nis_call.c: Likewise.
	* nis/nis_callback.c: Likewise.
	* nis/nss-default.c: Likewise.
	* nis/nss_compat/compat-grp.c: Likewise.
	* nis/nss_compat/compat-initgroups.c: Likewise.
	* nis/nss_compat/compat-pwd.c: Likewise.
	* nis/nss_compat/compat-spwd.c: Likewise.
	* nis/nss_nis/nis-alias.c: Likewise.
	* nis/nss_nis/nis-ethers.c: Likewise.
	* nis/nss_nis/nis-grp.c: Likewise.
	* nis/nss_nis/nis-hosts.c: Likewise.
	* nis/nss_nis/nis-network.c: Likewise.
	* nis/nss_nis/nis-proto.c: Likewise.
	* nis/nss_nis/nis-pwd.c: Likewise.
	* nis/nss_nis/nis-rpc.c: Likewise.
	* nis/nss_nis/nis-service.c: Likewise.
	* nis/nss_nis/nis-spwd.c: Likewise.
	* nis/nss_nisplus/nisplus-alias.c: Likewise.
	* nis/nss_nisplus/nisplus-ethers.c: Likewise.
	* nis/nss_nisplus/nisplus-grp.c: Likewise.
	* nis/nss_nisplus/nisplus-hosts.c: Likewise.
	* nis/nss_nisplus/nisplus-initgroups.c: Likewise.
	* nis/nss_nisplus/nisplus-network.c: Likewise.
	* nis/nss_nisplus/nisplus-proto.c: Likewise.
	* nis/nss_nisplus/nisplus-pwd.c: Likewise.
	* nis/nss_nisplus/nisplus-rpc.c: Likewise.
	* nis/nss_nisplus/nisplus-service.c: Likewise.
	* nis/nss_nisplus/nisplus-spwd.c: Likewise.
	* nis/ypclnt.c: Likewise.
	* nptl/libc_pthread_init.c: Likewise.
	* nss/getXXbyYY.c: Likewise.
	* nss/getXXent.c: Likewise.
	* nss/getXXent_r.c: Likewise.
	* nss/nss_db/db-XXX.c: Likewise.
	* nss/nss_db/db-netgrp.c: Likewise.
	* nss/nss_db/nss_db.h: Likewise.
	* nss/nss_files/files-XXX.c: Likewise.
	* nss/nss_files/files-alias.c: Likewise.
	* nss/nsswitch.c: Likewise.
	* posix/regex_internal.h: Likewise.
	* posix/wordexp.c: Likewise.
	* pwd/fgetpwent.c: Likewise.
	* resolv/res_hconf.c: Likewise.
	* resolv/res_libc.c: Likewise.
	* shadow/fgetspent.c: Likewise.
	* shadow/lckpwdf.c: Likewise.
	* shadow/sgetspent.c: Likewise.
	* socket/opensock.c: Likewise.
	* stdio-common/reg-modifier.c: Likewise.
	* stdio-common/reg-printf.c: Likewise.
	* stdio-common/reg-type.c: Likewise.
	* stdio-common/vfprintf.c: Likewise.
	* stdio-common/vfscanf.c: Likewise.
	* stdlib/abort.c: Likewise.
	* stdlib/cxa_atexit.c: Likewise.
	* stdlib/fmtmsg.c: Likewise.
	* stdlib/random.c: Likewise.
	* stdlib/setenv.c: Likewise.
	* string/strsignal.c: Likewise.
	* sunrpc/auth_none.c: Likewise.
	* sunrpc/bindrsvprt.c: Likewise.
	* sunrpc/create_xid.c: Likewise.
	* sunrpc/key_call.c: Likewise.
	* sunrpc/rpc_thread.c: Likewise.
	* sysdeps/arm/backtrace.c: Likewise.
	* sysdeps/generic/ldsodefs.h: Likewise.
	* sysdeps/generic/stdio-lock.h: Likewise.
	* sysdeps/generic/unwind-dw2-fde.c: Likewise.
	* sysdeps/i386/backtrace.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/nldbl-compat.c: Likewise.
	* sysdeps/m68k/backtrace.c: Likewise.
	* sysdeps/mach/hurd/cthreads.c: Likewise.
	* sysdeps/mach/hurd/dirstream.h: Likewise.
	* sysdeps/mach/hurd/malloc-machine.h: Likewise.
	* sysdeps/nptl/malloc-machine.h: Likewise.
	* sysdeps/nptl/stdio-lock.h: Likewise.
	* sysdeps/posix/dirstream.h: Likewise.
	* sysdeps/posix/getaddrinfo.c: Likewise.
	* sysdeps/posix/system.c: Likewise.
	* sysdeps/pthread/aio_suspend.c: Likewise.
	* sysdeps/s390/s390-32/backtrace.c: Likewise.
	* sysdeps/s390/s390-64/backtrace.c: Likewise.
	* sysdeps/unix/sysv/linux/check_pf.c: Likewise.
	* sysdeps/unix/sysv/linux/if_index.c: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/getutent_r.c: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/getutid_r.c: Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/getutline_r.c: Likewise.
	* sysdeps/unix/sysv/linux/shm-directory.c: Likewise.
	* sysdeps/unix/sysv/linux/system.c: Likewise.
	* sysdeps/x86_64/backtrace.c: Likewise.
	* time/alt_digit.c: Likewise.
	* time/era.c: Likewise.
	* time/tzset.c: Likewise.
	* wcsmbs/wcsmbsload.c: Likewise.
	* nptl/tst-initializers1.c (do_test): Refer to <libc-lock.h>
	instead of <bits/libc-lock.h> in comment.
 2015-09-08 21:11:03 +00:00
H.J. Lu
75dd0a8f3d Detect and select i586/i686 implementation at run-time 
We detect i586 and i686 features at run-time by checking CX8 and CMOV
CPUID features bits.  We can use these information to select the best
implementation in ix86 multiarch.  HAS_I586/HAS_I686 is true if i586/i686
instructions are available on the processor.

Due to the reordering and the other nifty extensions in i686, it is not
really good to use heavily i586 optimized code on an i686.  It's better
to use i486 code if it isn't an i586.  USE_I586/USE_I686 is true if
i586/i686 implementation should be used for the processor.  USE_I586
is true only if i686 instructions aren't available.  If i686 instructions
are available, we always choose i686 or i486 implementation, in that order,
and we never choose i586 implementation for i686-class processors.

	* sysdeps/i386/init-arch.h: New file.
	* sysdeps/i386/i586/init-arch.h: Likewise.
	* sysdeps/i386/i686/init-arch.h: Likewise.
	* sysdeps/x86/cpu-features.c (init_cpu_features): Set bit_I586
	bit if CX8 is available.  Set bit_I686 bit if CMOV is available.
	* sysdeps/x86/cpu-features.h (bit_I586): New.
	(bit_I686): Likewise.
	(bit_CX8): Likewise.
	(bit_CMOV): Likewise.
	(index_CX8): Likewise.
	(index_CMOV): Likewise.
	(index_I586): Likewise.
	(index_I686): Likewise.
	(reg_CX8): Likewise.
	(reg_CMOV): Likewise.
	(HAS_I586): Defined as HAS_ARCH_FEATURE (I586) if i586 isn't
	available at compile-time.
	(HAS_I686): Defined as HAS_ARCH_FEATURE (I686) if i686 isn't
	available at compile-time.
	* sysdeps/x86/init-arch.h (USE_I586): New macro.
	(USE_I686): Likewise.
 2015-08-27 09:06:44 -07:00
H.J. Lu
d226114b9b Add i386 memset and memcpy assembly functions 
Add i386 memset and memcpy assembly functions with REP MOVSB/STOSB
instructions.

	* sysdeps/i386/bcopy.S: New file.
	* sysdeps/i386/bzero.S: Likewise.
	* sysdeps/i386/memcpy.S: Likewise.
	* sysdeps/i386/memmove.S: Likewise.
	* sysdeps/i386/mempcpy.S: Likewise.
	* sysdeps/i386/memset.S: Likewise.
	* sysdeps/i386/bzero.c: Removed.
	* sysdeps/i386/memset.c: Likewise.
	* sysdeps/i386/i586/memcpy_chk.S: Likewise.
	* sysdeps/i386/i586/mempcpy_chk.S: Likewise.
	* sysdeps/i386/i586/memset_chk.S: Likewise.
	* sysdeps/i386/i686/memcpy_chk.S: Moved to ...
	* sysdeps/i386/memcpy_chk.S: Here.
	* sysdeps/i386/i686/memmove_chk.S: Moved to ...
	* sysdeps/i386/memmove_chk.S: Here.
	* sysdeps/i386/i686/mempcpy_chk.S: Moved to ...
	* sysdeps/i386/mempcpy_chk.S: Likewise.
	* sysdeps/i386/i686/memset_chk.S: Moved to ...
	* sysdeps/i386/memset_chk.S: Likewise.
 2015-08-27 09:04:54 -07:00
H.J. Lu
ae857215dd Remove i486 subdirectory 
Since glibc doesn't support i386 any more, we can remove i486 subdirectory.

	* sysdeps/i386/i586/Implies: Removed.
	* sysdeps/i386/i686/Implies: Likewise.
 2015-08-27 07:59:29 -07:00
H.J. Lu
892bb11e4e Move i486/strlen.S to strlen.S 
Since glibc doesn't support i386 any more, we can move i486/strlen.S
to strlen.S.

	* sysdeps/i386/i486/strlen.S: Moved to ...
	* sysdeps/i386/strlen.S: Here.
 2015-08-27 07:57:55 -07:00
H.J. Lu
8964482ab8 Move i486/strcat.S to strcat.S 
Since glibc doesn't support i386 any more, we can move i486/strcat.S
to strcat.S.

	* sysdeps/i386/i486/strcat.S: Moved to ...
	* sysdeps/i386/strcat.S: Here.
	* sysdeps/i386/i686/multiarch/strcat.S: Updated.
 2015-08-27 07:56:41 -07:00
H.J. Lu
413db45d1b Move i486/pthread_spin_trylock.S to pthread_spin_trylock.S 
Since glibc doesn't support i386 any more, we can move
i486/pthread_spin_trylock.S to pthread_spin_trylock.S

	* sysdeps/i386/i486/pthread_spin_trylock.S: Moved to ...
	* sysdeps/i386/pthread_spin_trylock.S: Here.
	* sysdeps/i386/i586/pthread_spin_trylock.S: Removed.
	* sysdeps/i386/i686/pthread_spin_trylock.S: Updated.
 2015-08-27 07:55:29 -07:00
H.J. Lu
1894b3ea3c Move i486/string-inlines.c to string-inlines.c 
Since glibc doesn't support i386 any more, we can move
i486/string-inlines.c to string-inlines.c.

	* sysdeps/i386/i486/string-inlines.c: Moved to ...
	* sysdeps/i386/string-inlines.c: Here.
 2015-08-27 07:51:55 -07:00
H.J. Lu
267dfab1bd Move i486/htonl.S to htonl.S 
Since glibc doesn't support i386 any more, we can move i486/htonl.S to
htonl.S.

	* sysdeps/i386/i486/htonl.S: Moved ...
	* sysdeps/i386/htonl.S: here.
 2015-08-27 07:50:34 -07:00
H.J. Lu
e30680c07a Move i486/bits/atomic.h to bits/atomic.h 
Since glibc doesn't support i386 any more, we can move i486/bits/atomic.h
to bits/atomic.h.

	* sysdeps/i386/i486/bits/atomic.h: Moved to ...
	* sysdeps/i386/bits/atomic.h: Here.
 2015-08-27 07:49:22 -07:00
H.J. Lu
4d374e4d38 Remove sysdeps/i386/i486/Versions 
sysdeps/i386/i486/Versions isn't needed since it duplicates contents
in sysdeps/i386/Versions.

	* sysdeps/i386/i486/Versions: Removed.
 2015-08-27 07:45:14 -07:00
H.J. Lu
f6b71eada3 Replace BZERO_P/PIC with USE_AS_BZERO/SHARED 
Replace BZERO_P with USE_AS_BZERO in i586/i686 memset.S to support i386
multi-arch memset.  Also we should check SHARED not PIC for libc.so
since libc.a may be compiled with PIC.

	* sysdeps/i386/i586/bzero.S (USE_AS_BZERO): New.
	* sysdeps/i386/i686/bzero.S (USE_AS_BZERO): Likewise.
	* sysdeps/i386/i586/memset.S (BZERO_P): Removed.
	Check USE_AS_BZERO/SHARED instead of BZERO_P/PIC.
	(__memset_zero_constant_len_parameter): New.
	* sysdeps/i386/i686/memset.S (BZERO_P): Removed.
	Check USE_AS_BZERO/SHARED instead of BZERO_P/PIC.
	(__memset_zero_constant_len_parameter): Don't define if
	__memset_chk or USE_AS_BZERO are defined.
 2015-08-26 08:01:03 -07:00
H.J. Lu
b6e19c4bdc Replace MEMPCPY_P/PIC with USE_AS_MEMPCPY/SHARED 
Replace MEMPCPY_P with USE_AS_MEMPCPY in i586 memcpy.S to support i386
multi-arch memcpy.  Also we should check SHARED not PIC for libc.so
since libc.a may be compiled with PIC.

	* sysdeps/i386/i586/memcpy.S (MEMPCPY_P): Removed.
	Check USE_AS_MEMPCPY/SHARED instead of MEMPCPY_P/PIC.
	* sysdeps/i386/i586/mempcpy.S (USE_AS_MEMPCPY): New.
 2015-08-26 07:59:32 -07:00
H.J. Lu
38d22f9f48 Don't disable SSE in x86-64 ld.so 
Since x86-64 ld.so preserves vector registers now, we can use SSE in
x86-64 ld.so.  We should run tst-ld-sse-use.sh only on i386.

	* sysdeps/x86/Makefile [$(subdir) == elf] (CFLAGS-.os,
	tests-special, $(objpfx)tst-ld-sse-use.out): Moved to ...
	* sysdeps/i386/Makefile [$(subdir) == elf] (CFLAGS-.os,
	tests-special, $(objpfx)tst-ld-sse-use.out): Here.  Update
	comments.
	* sysdeps/x86_64/Makefile [$(subdir) == elf] (CFLAGS-.os): Add
	-mno-mmx for $(all-rtld-routines).
	* sysdeps/x86/tst-ld-sse-use.sh: Moved to ...
	* sysdeps/i386/tst-ld-sse-use.sh: Here.  Replace x86-64 with
	i386.
 2015-08-26 07:55:42 -07:00
H.J. Lu
daa4db69fc Remove the unused IFUNC files 
sysdeps/i386/i686/multiarch/strcasestr-c.c became unused after

commit 1818483b15
Author: Andreas Schwab <schwab@suse.de>
Date:   Wed Dec 18 11:53:27 2013 +1000

    Remove use of SSE4.2 functions for strstr on i686

which contains

-sysdep_routines += strcspn-c strpbrk-c strspn-c strstr-c strcasestr-c
+sysdep_routines += strcspn-c strpbrk-c strspn-c

sysdeps/x86_64/multiarch/strcasestr.c became useless after

t 584b18eb4d
Author: Ondřej Bílka <neleai@seznam.cz>
Date:   Sat Dec 14 19:33:56 2013 +0100

    Add strstr with unaligned loads. Fixes bug 12100.

which changes sysdeps/x86_64/multiarch/strcasestr.c to

libc_ifunc (__strcasestr, __strcasestr_sse2);

This patch removes these file.

	* i386/i686/multiarch/strcasestr-c.c: Removed.
	* x86_64/multiarch/strcasestr.c: Likewise.
	* x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list):
	Remove strcasestr.
 2015-08-20 12:47:20 -07:00
H.J. Lu
1ae6c72dc1 Move x86_64 init-arch.h to sysdeps/x86/init-arch.h 
Move sysdeps/x86_64/multiarch/init-arch.h to sysdeps/x86/init-arch.h
which can be used for both i386 and x86_64.

	* sysdeps/i386/i686/multiarch/init-arch.h: Removed.
	* sysdeps/unix/sysv/linux/x86/init-arch.h: Likewise.
	* sysdeps/x86_64/cacheinfo.c: Include <init-arch.h> instead
	of "multiarch/init-arch.h".
	* sysdeps/x86_64/multiarch/init-arch.h: Renamed to ...
	* sysdeps/x86/init-arch.h: This.
 2015-08-20 04:29:23 -07:00
H.J. Lu
a452ef24d5 Remove x86 init-arch.c 
Both files include sysdeps/x86_64/multiarch/init-arch.c which has been
removed.

	* sysdeps/i386/i686/multiarch/init-arch.c: Removed.
	* sysdeps/unix/sysv/linux/x86/init-arch.c: Likewise.
 2015-08-20 04:19:59 -07:00
Joseph Myers
948e12a238 Fix csqrt missing underflows (bug 18370). 
The csqrt implementations in glibc can miss underflow exceptions when
the real or imaginary part of the result becomes tiny in the course of
scaling down (in particular, multiplication by 0.5) and that scaling
is exact although the relevant part of the mathematical result isn't.
This patch forces the exception in a similar way to previous fixes.

Tested for x86_64 and x86.

	[BZ #18370]
	* math/s_csqrt.c (__csqrt): Force underflow exception for results
	whose real or imaginary part has small absolute value.
	* math/s_csqrtf.c (__csqrtf): Likewise.
	* math/s_csqrtl.c (__csqrtl): Likewise.
	* math/auto-libm-test-in: Add more tests of csqrt.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
 2015-08-19 22:42:01 +00:00
H.J. Lu
3552daa7ac Use x86-64 cacheinfo.c and sysconf.c for x86 
Since _dl_x86_cpu_features is always available, we can use x86-64
cacheinfo.c and sysconf.c for both i386 and x86-64.

	* sysdeps/i386/i686/Makefile
	[$(subdir) == string] (sysdep_routines): Moved to ...
	* sysdeps/i386/Makefile: Here.
	* sysdeps/i386/i686/cacheinfo.c: Moved to ...
	* sysdeps/i386/cacheinfo.c: Here.
	* sysdeps/unix/sysv/linux/i386/sysconf.c: Removed.
	* sysdeps/unix/sysv/linux/i386/i686/sysconf.c: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/sysconf.c: Moved to ...
	* sysdeps/unix/sysv/linux/x86/sysconf.c: Here.
 2015-08-19 04:27:04 -07:00
Paul Pluzhnikov
d5dff793af Fix BZ #18084 -- backtrace (..., 0) dumps core on x86. 
Other architectures also had bugs, or did unnecessary work.
 2015-08-15 11:42:43 -07:00
Joseph Myers
3ba0ac10fa Add more random libm-test inputs. 
This patch adds more test inputs to various libm functions found
through random generation to have larger ulps errors than previously
listed in libm-test-ulp, on at least one of x86_64 and x86.

Tested for x86_64 and x86.

	* math/auto-libm-test-in: Add more tests of acos, acosh, asin,
	asinh, atan, atan2, atanh, cabs, cbrt, cosh, csqrt, erf, erfc,
	exp, exp2, lgamma, log, log1p, log2, pow, sin, sincos, tan, tanh
	and tgamma.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2015-08-13 23:23:23 +00:00
Joseph Myers
37d83a089d Fix tanh missing underflows (bug 16520). 
Similar to various other bugs in this area, some tanh implementations
do not raise the underflow exception for subnormal arguments, when the
result is tiny and inexact.  This patch forces the exception in a
similar way to previous fixes.

Tested for x86_64, x86, mips64 and powerpc.

	[BZ #16520]
	* sysdeps/ieee754/dbl-64/s_tanh.c: Include <float.h>.
	(__tanh): Force underflow exception for arguments with small
	absolute value.
	* sysdeps/ieee754/flt-32/s_tanhf.c: Include <float.h>.
	(__tanhf): Force underflow exception for arguments with small
	absolute value.
	* sysdeps/ieee754/ldbl-128/s_tanhl.c: Include <float.h>.
	(__tanhl): Force underflow exception for arguments with small
	absolute value.
	* sysdeps/ieee754/ldbl-128ibm/s_tanhl.c: Include <float.h>.
	(__tanhl): Force underflow exception for arguments with small
	absolute value.
	* sysdeps/ieee754/ldbl-96/s_tanhl.c: Include <float.h>.
	(__tanhl): Force underflow exception for arguments with small
	absolute value.
	* math/auto-libm-test-in: Add more tests of tanh.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
 2015-08-13 16:40:39 +00:00
H.J. Lu
1aee37a22e Update i686 multiarch functions for <cpu-features.h> 
This patch updates i686 multiarch functions to use the newly defined
HAS_CPU_FEATURE, HAS_ARCH_FEATURE, LOAD_GOT_AND_RTLD_GLOBAL_RO and
LOAD_FUNC_GOT_EAX from <cpu-features.h>.

	* sysdeps/i386/i686/fpu/multiarch/e_expf.c: Replace HAS_XXX
	with HAS_CPU_FEATURE/HAS_ARCH_FEATURE (XXX).
	* sysdeps/i386/i686/fpu/multiarch/s_cosf.c: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/s_cosf.c: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/s_sincosf.c: Likewise.
	* sysdeps/i386/i686/fpu/multiarch/s_sinf.c: Likewise.
	* sysdeps/i386/i686/multiarch/ifunc-impl-list.c: Likewise.
	* sysdeps/i386/i686/multiarch/s_fma.c: Likewise.
	* sysdeps/i386/i686/multiarch/s_fmaf.c: Likewise.
	* sysdeps/i386/i686/multiarch/bcopy.S: Remove __init_cpu_features
	call.  Merge SHARED and !SHARED.  Add LOAD_GOT_AND_RTLD_GLOBAL_RO.
	Use LOAD_FUNC_GOT_EAX to load function address.  Replace HAS_XXX
	with HAS_CPU_FEATURE/HAS_ARCH_FEATURE (XXX).
	* sysdeps/i386/i686/multiarch/bzero.S: Likewise.
	* sysdeps/i386/i686/multiarch/memchr.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcmp.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/memcpy_chk.S: Likewise.
	* sysdeps/i386/i686/multiarch/memmove.S: Likewise.
	* sysdeps/i386/i686/multiarch/memmove_chk.S: Likewise.
	* sysdeps/i386/i686/multiarch/mempcpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/mempcpy_chk.S: Likewise.
	* sysdeps/i386/i686/multiarch/memrchr.S: Likewise.
	* sysdeps/i386/i686/multiarch/memset.S: Likewise.
	* sysdeps/i386/i686/multiarch/memset_chk.S: Likewise.
	* sysdeps/i386/i686/multiarch/rawmemchr.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcasecmp.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcat.S: Likewise.
	* sysdeps/i386/i686/multiarch/strchr.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcmp.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/strcspn.S: Likewise.
	* sysdeps/i386/i686/multiarch/strlen.S: Likewise.
	* sysdeps/i386/i686/multiarch/strncase.S: Likewise.
	* sysdeps/i386/i686/multiarch/strnlen.S: Likewise.
	* sysdeps/i386/i686/multiarch/strrchr.S: Likewise.
	* sysdeps/i386/i686/multiarch/strspn.S: Likewise.
	* sysdeps/i386/i686/multiarch/wcschr.S: Likewise.
	* sysdeps/i386/i686/multiarch/wcscmp.S: Likewise.
	* sysdeps/i386/i686/multiarch/wcscpy.S: Likewise.
	* sysdeps/i386/i686/multiarch/wcslen.S: Likewise.
	* sysdeps/i386/i686/multiarch/wcsrchr.S: Likewise.
	* sysdeps/i386/i686/multiarch/wmemcmp.S: Likewise.
 2015-08-13 03:41:37 -07:00
H.J. Lu
e2e4f56056 Add _dl_x86_cpu_features to rtld_global 
This patch adds _dl_x86_cpu_features to rtld_global in x86 ld.so
and initializes it early before __libc_start_main is called so that
cpu_features is always available when it is used and we can avoid
calling __init_cpu_features in IFUNC selectors.

	* sysdeps/i386/dl-machine.h: Include <cpu-features.c>.
	(dl_platform_init): Call init_cpu_features.
	* sysdeps/i386/dl-procinfo.c (_dl_x86_cpu_features): New.
	* sysdeps/i386/i686/cacheinfo.c
	(DISABLE_PREFERRED_MEMORY_INSTRUCTION): Removed.
	* sysdeps/i386/i686/multiarch/Makefile (aux): Remove init-arch.
	* sysdeps/i386/i686/multiarch/Versions: Removed.
	* sysdeps/i386/i686/multiarch/ifunc-defines.sym (KIND_OFFSET):
	Removed.
	* sysdeps/i386/ldsodefs.h: Include <cpu-features.h>.
	* sysdeps/unix/sysv/linux/x86/Makefile
	(libpthread-sysdep_routines): Remove init-arch.
	* sysdeps/unix/sysv/linux/x86_64/dl-procinfo.c: Include
	<sysdeps/x86_64/dl-procinfo.c> instead of
	sysdeps/generic/dl-procinfo.c>.
	* sysdeps/x86/Makefile [$(subdir) == csu] (gen-as-const-headers):
	Add cpu-features-offsets.sym and rtld-global-offsets.sym.
	[$(subdir) == elf] (sysdep-dl-routines): Add dl-get-cpu-features.
	[$(subdir) == elf] (tests): Add tst-get-cpu-features.
	[$(subdir) == elf] (tests-static): Add
	tst-get-cpu-features-static.
	* sysdeps/x86/Versions: New file.
	* sysdeps/x86/cpu-features-offsets.sym: Likewise.
	* sysdeps/x86/cpu-features.c: Likewise.
	* sysdeps/x86/cpu-features.h: Likewise.
	* sysdeps/x86/dl-get-cpu-features.c: Likewise.
	* sysdeps/x86/libc-start.c: Likewise.
	* sysdeps/x86/rtld-global-offsets.sym: Likewise.
	* sysdeps/x86/tst-get-cpu-features-static.c: Likewise.
	* sysdeps/x86/tst-get-cpu-features.c: Likewise.
	* sysdeps/x86_64/dl-procinfo.c: Likewise.
	* sysdeps/x86_64/cacheinfo.c (__cpuid_count): Removed.
	Assume USE_MULTIARCH is defined and don't check it.
	(is_intel): Replace __cpu_features with GLRO(dl_x86_cpu_features).
	(is_amd): Likewise.
	(max_cpuid): Likewise.
	(intel_check_word): Likewise.
	(__cache_sysconf): Don't call __init_cpu_features.
	(__x86_preferred_memory_instruction): Removed.
	(init_cacheinfo): Don't call __init_cpu_features. Replace
	__cpu_features with GLRO(dl_x86_cpu_features).
	* sysdeps/x86_64/dl-machine.h: <cpu-features.c>.
	(dl_platform_init): Call init_cpu_features.
	* sysdeps/x86_64/ldsodefs.h: Include <cpu-features.h>.
	* sysdeps/x86_64/multiarch/Makefile (aux): Remove init-arch.
	* sysdeps/x86_64/multiarch/Versions: Removed.
	* sysdeps/x86_64/multiarch/cacheinfo.c: Likewise.
	* sysdeps/x86_64/multiarch/init-arch.c: Likewise.
	* sysdeps/x86_64/multiarch/ifunc-defines.sym (KIND_OFFSET):
	Removed.
	* sysdeps/x86_64/multiarch/init-arch.h: Rewrite.
 2015-08-13 03:41:22 -07:00
Joseph Myers
4afe4b20ce Add more tests of various libm functions. 
This patch adds more tests of various libm functions found through
random test generation to give increased ulps on 32-bit x86.

Tested for x86_64 and x86.

	* math/auto-libm-test-in: Add more tests of acosh, asin, asinh,
	atanh, cabs, carg, cbrt, cosh, csqrt, erf, erfc, exp, exp10,
	expm1, hypot, log, log10, log1p, log2, pow, sinh, tan and tgamma.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2015-08-11 00:58:28 +00:00
Joseph Myers
7ee06ef158 Fix ldbl-128ibm tanhl inaccuracy (bug 18790). 
ldbl-128ibm tanhl uses a too-small threshold to decide when to return
+/-1, resulting in large errors.  This patch changes it to a more
appropriate threshold (the requirement is for 2*exp(-2|x|) to be small
in terms of ulps of 1).

Tested for x86_64, x86 and powerpc.

	[BZ #18790]
	* sysdeps/ieee754/ldbl-128ibm/s_tanhl.c (__tanhl): Increase
	threshold for returning +/- 1.
	* math/auto-libm-test-in: Add more tests of tanh.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
 2015-08-10 20:35:30 +00:00
Joseph Myers
d0649b2d8e Fix ldbl-128ibm sinhl inaccuracy near 0 (bug 18789). 
ldbl-128ibm sinhl uses a too-big threshold to decide when to return
the argument, resulting in large errors.  This patch fixes it to use a
more appropriate threshold.

Tested for x86_64, x86 and powerpc.

	[BZ #18789]
	* sysdeps/ieee754/ldbl-128ibm/e_sinhl.c (__ieee754_sinhl): Use
	smaller threshold for returning the argument.
	* math/auto-libm-test-in: Add more tests of sinh.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
 2015-08-10 15:25:10 +00:00
H.J. Lu
d2ff039fa1 Add a missing break in tst-auditmod3b.c 
[BZ #18674]
	* sysdeps/i386/tst-auditmod3b.c (la_objsearch): Add a missing
	break.
 2015-08-09 08:06:50 -07:00
Joseph Myers
5e29dd5737 Fix sinh missing underflows (bug 16519). 
Similar to various other bugs in this area, some sinh implementations
do not raise the underflow exception for subnormal arguments, when the
result is tiny and inexact.  This patch forces the exception in a
similar way to previous fixes.

Tested for x86_64, x86, mips64 and powerpc.

	[BZ #16519]
	* sysdeps/ieee754/dbl-64/e_sinh.c: Include <float.h>.
	(__ieee754_sinh): Force underflow exception for arguments with
	small absolute value.
	* sysdeps/ieee754/flt-32/e_sinhf.c: Include <float.h>.
	(__ieee754_sinhf): Force underflow exception for arguments with
	small absolute value.
	* sysdeps/ieee754/ldbl-128/e_sinhl.c: Include <float.h>.
	(__ieee754_sinhl): Force underflow exception for arguments with
	small absolute value.
	* sysdeps/ieee754/ldbl-128ibm/e_sinhl.c: Include <float.h>.
	(__ieee754_sinhl): Force underflow exception for arguments with
	small absolute value.
	* sysdeps/ieee754/ldbl-96/e_sinhl.c: Include <float.h>.
	(__ieee754_sinhl): Force underflow exception for arguments with
	small absolute value.
	* math/auto-libm-test-in: Add more tests of sinh.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
 2015-08-06 23:01:09 +00:00
Andreas Schwab
bbab82c25d Properly terminate FDE in makecontext for ix86 (bug 18635) 2015-08-04 17:46:56 +02:00
Stefan Liebler
f6267fd880 i686: Mark stdlib/tst-makecontext as XFAIL. 
The testcase stdlib/tst-makecontext fails on i686 because
_Unwind_Backtrace from libgcc produces a segmentation fault if it was
called within a context created by makecontext. See Bug 18635.

ChangeLog:

	* sysdeps/i386/i686/Makefile (test-xfail-tst-makecontext):
	New variable.
 2015-07-15 09:33:15 +02:00
Igor Zamyatin
14c5cbabc2 Preserve bound registers for pointer pass/return 
We need to save/restore bound registers and add a BND prefix before
branches in _dl_runtime_profile so that bound registers for pointer
pass and return are preserved when LD_AUDIT is used.

	[BZ #18134]
	* sysdeps/i386/configure.ac: Set HAVE_MPX_SUPPORT.
	* sysdeps/i386/configure: Regenerated.
	* sysdeps/i386/dl-trampoline.S (PRESERVE_BND_REGS_PREFIX): New.
	(_dl_runtime_profile): Save and restore Intel MPX return bound
	registers when calling _dl_call_pltexit.  Add
	PRESERVE_BND_REGS_PREFIX before return.
	* sysdeps/i386/link-defines.sym (LRV_BND0_OFFSET): New.
	(LRV_BND1_OFFSET): Likewise.
	* sysdeps/x86/bits/link.h (La_i86_retval): Add lrv_bnd0 and
	lrv_bnd1.
	* sysdeps/x86_64/dl-trampoline.S (_dl_runtime_profile): Fix
	typo in bndmov encoding.
	* sysdeps/x86_64/dl-trampoline.h: Properly save and restore
	Intel MPX bound registers.  Add PRESERVE_BND_REGS_PREFIX before
	branch instructions to preserve bounds.
 2015-07-09 06:50:12 -07:00
H.J. Lu
ddd85a65b6 Add and use sysdeps/i386/link-defines.sym 
Define macros for fields in La_i86_regs and La_i86_retval and use them
in dl-trampoline.S, instead of hardcoded values.

	* sysdeps/i386/Makefile (gen-as-const-headers)[elf]: Add
	link-defines.sym.
	* sysdeps/i386/dl-trampoline.S: Include <link-defines.h>.
	(_dl_runtime_profile): Use LONG_DOUBLE_SIZE, LRV_SIZE,
	LRV_EAX_OFFSET, LRV_EDX_OFFSET, LRV_ST0_OFFSET, LRV_ST1_OFFSET
	and LR_SIZE.
	* sysdeps/i386/link-defines.sym: New file.
 2015-07-07 05:23:40 -07:00
H.J. Lu
fa9fef1f9b Add a testcase for i386 LD_AUDIT 
This patch adds a testcase for i386 LD_AUDIT to check function return
and parameters passed in registers.

	* sysdeps/i386/Makefile (tests)[elf]: Add tst-audit3.
	(modules-names): Add tst-auditmod3a tst-auditmod3b.
	($(objpfx)tst-audit3): New rule.
	($(objpfx)tst-audit3.out): Likewise.
	* sysdeps/i386/tst-audit3.c: New file.
	* sysdeps/i386/tst-audit3.h: Likewise.
	* sysdeps/i386/tst-auditmod3a.c: Likewise.
	* sysdeps/i386/tst-auditmod3b.c: Likewise.
 2015-07-07 05:09:30 -07:00
Torvald Riegel
4eb984d3ab Clean up BUSY_WAIT_NOP and atomic_delay. 
This patch combines BUSY_WAIT_NOP and atomic_delay into a new
atomic_spin_nop function and adjusts all clients.  The new function is
put into atomic.h because what is best done in a spin loop is
architecture-specific, and atomics must be used for spinning.  The
function name is meant to tell users that this has no effect on
synchronization semantics but is a performance aid for spinning.
 2015-06-30 15:57:15 +02:00
Joseph Myers
e02920bc02 Improve tgamma accuracy (bug 18613). 
In non-default rounding modes, tgamma can be slightly less accurate
than permitted by glibc's accuracy goals.

Part of the problem is error accumulation, addressed in this patch by
setting round-to-nearest for internal computations.  However, there
was also a bug in the code dealing with computing pow (x + n, x + n)
where x + n is not exactly representable, providing another source of
error even in round-to-nearest mode; it was necessary to address both
bugs to get errors for all testcases within glibc's accuracy goals.
Given this second fix, accuracy in round-to-nearest mode is also
improved (hence regeneration of ulps for tgamma should be from scratch
- truncate libm-test-ulps or at least remove existing tgamma entries -
so that the expected ulps can be reduced).

Some additional complications also arose.  Certain tgamma tests should
strictly, according to IEEE semantics, overflow or not depending on
the rounding mode; this is beyond the scope of glibc's accuracy goals
for any function without exactly-determined results, but
gen-auto-libm-tests doesn't handle being lax there as it does for
underflow.  (libm-test.inc also doesn't handle being lax about whether
the result in cases very close to the overflow threshold is infinity
or a finite value close to overflow, but that doesn't cause problems
in this case though I've seen it cause problems with random test
generation for some functions.)  Thus, spurious-overflow markings,
with a comment, are added to auto-libm-test-in (no bug in Bugzilla
because the issue is with the testsuite, not a user-visible bug in
glibc).  And on x86, after the patch I saw ERANGE issues as previously
reported by Carlos (see my commentary in
<https://sourceware.org/ml/libc-alpha/2015-01/msg00485.html>), which
needed addressing by ensuring excess range and precision were
eliminated at various points if FLT_EVAL_METHOD != 0.

I also noticed and fixed a cosmetic issue where 1.0f was used in long
double functions and should have been 1.0L.

This completes the move of all functions to testing in all rounding
modes with ALL_RM_TEST, so gen-libm-have-vector-test.sh is updated to
remove the workaround for some functions not using ALL_RM_TEST.

Tested for x86_64, x86, mips64 and powerpc.

	[BZ #18613]
	* sysdeps/ieee754/dbl-64/e_gamma_r.c (gamma_positive): Take log of
	X_ADJ not X when adjusting exponent.
	(__ieee754_gamma_r): Do intermediate computations in
	round-to-nearest then adjust overflowing and underflowing results
	as needed.
	* sysdeps/ieee754/flt-32/e_gammaf_r.c (gammaf_positive): Take log
	of X_ADJ not X when adjusting exponent.
	(__ieee754_gammaf_r): Do intermediate computations in
	round-to-nearest then adjust overflowing and underflowing results
	as needed.
	* sysdeps/ieee754/ldbl-128/e_gammal_r.c (gammal_positive): Take
	log of X_ADJ not X when adjusting exponent.
	(__ieee754_gammal_r): Do intermediate computations in
	round-to-nearest then adjust overflowing and underflowing results
	as needed.  Use 1.0L not 1.0f as numerator of division.
	* sysdeps/ieee754/ldbl-128ibm/e_gammal_r.c (gammal_positive): Take
	log of X_ADJ not X when adjusting exponent.
	(__ieee754_gammal_r): Do intermediate computations in
	round-to-nearest then adjust overflowing and underflowing results
	as needed.  Use 1.0L not 1.0f as numerator of division.
	* sysdeps/ieee754/ldbl-96/e_gammal_r.c (gammal_positive): Take log
	of X_ADJ not X when adjusting exponent.
	(__ieee754_gammal_r): Do intermediate computations in
	round-to-nearest then adjust overflowing and underflowing results
	as needed.  Use 1.0L not 1.0f as numerator of division.
	* math/libm-test.inc (tgamma_test_data): Remove one test.  Moved
	to auto-libm-test-in.
	(tgamma_test): Use ALL_RM_TEST.
	* math/auto-libm-test-in: Add one test of tgamma.  Mark some other
	tests of tgamma with spurious-overflow.
	* math/auto-libm-test-out: Regenerated.
	* math/gen-libm-have-vector-test.sh: Do not check for START.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2015-06-29 23:29:35 +00:00
Joseph Myers
a8e2112ae3 Use round-to-nearest internally in jn, test with ALL_RM_TEST (bug 18602). 
Some existing jn tests, if run in non-default rounding modes, produce
errors above those accepted in glibc, which causes problems for moving
tests of jn to use ALL_RM_TEST.  This patch makes jn set rounding
to-nearest internally, as was done for yn some time ago, then computes
the appropriate underflowing value for results that underflowed to
zero in to-nearest, and moves the tests to ALL_RM_TEST.  It does
nothing about the general inaccuracy of Bessel function
implementations in glibc, though it should make jn more accurate on
average in non-default rounding modes through reduced error
accumulation.  The recomputation of results that underflowed to zero
should as a side-effect fix some cases of bug 16559, where jn just
used an exact zero, but that is *not* the goal of this patch and other
cases of that bug remain unfixed.

(Most of the changes in the patch are reindentation to add new scopes
for SET_RESTORE_ROUND*.)

Tested for x86_64, x86, powerpc and mips64.

	[BZ #16559]
	[BZ #18602]
	* sysdeps/ieee754/dbl-64/e_jn.c (__ieee754_jn): Set
	round-to-nearest internally then recompute results that
	underflowed to zero in the original rounding mode.
	* sysdeps/ieee754/flt-32/e_jnf.c (__ieee754_jnf): Likewise.
	* sysdeps/ieee754/ldbl-128/e_jnl.c (__ieee754_jnl): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/e_jnl.c (__ieee754_jnl): Likewise.
	* sysdeps/ieee754/ldbl-96/e_jnl.c (__ieee754_jnl): Likewise
	* math/libm-test.inc (jn_test): Use ALL_RM_TEST.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2015-06-25 21:46:02 +00:00
Joseph Myers
a67894c505 Fix cexp, ccos, ccosh, csin, csinh spurious underflows (bug 18594). 
cexp, ccos, ccosh, csin and csinh have spurious underflows in cases
where they compute sin of the smallest normal, that produces an
underflow exception (depending on which sin implementation is in use)
but the final result does not underflow.  ctan and ctanh may also have
such underflows, or they may be latent (the issue there is that
e.g. ctan (DBL_MIN) should, rounded upwards, be the next double value
above DBL_MIN, which under glibc's accuracy goals may not have an
underflow exception, but the intermediate computation of sin (DBL_MIN)
would legitimately underflow on before-rounding architectures).

This patch fixes all those functions so they use plain comparisons (>
DBL_MIN etc.) instead of comparing the result of fpclassify with
FP_SUBNORMAL (in all these cases, we already know the number being
compared is finite).  Note that in the case of csin / csinf / csinl,
there is no need for fabs calls in the comparison because the real
part has already been reduced to its absolute value.

As the patch fixes the failures that previously obstructed moving
tests of cexp to use ALL_RM_TEST, those tests are moved to ALL_RM_TEST
by the patch (two functions remain yet to be converted).

Tested for x86_64 and x86 and ulps updated accordingly.

	[BZ #18594]
	* math/s_ccosh.c (__ccosh): Compare with least normal value
	instead of comparing class with FP_SUBNORMAL.
	* math/s_ccoshf.c (__ccoshf): Likewise.
	* math/s_ccoshl.c (__ccoshl): Likewise.
	* math/s_cexp.c (__cexp): Likewise.
	* math/s_cexpf.c (__cexpf): Likewise.
	* math/s_cexpl.c (__cexpl): Likewise.
	* math/s_csin.c (__csin): Likewise.
	* math/s_csinf.c (__csinf): Likewise.
	* math/s_csinh.c (__csinh): Likewise.
	* math/s_csinhf.c (__csinhf): Likewise.
	* math/s_csinhl.c (__csinhl): Likewise.
	* math/s_csinl.c (__csinl): Likewise.
	* math/s_ctan.c (__ctan): Likewise.
	* math/s_ctanf.c (__ctanf): Likewise.
	* math/s_ctanh.c (__ctanh): Likewise.
	* math/s_ctanhf.c (__ctanhf): Likewise.
	* math/s_ctanhl.c (__ctanhl): Likewise.
	* math/s_ctanl.c (__ctanl): Likewise.
	* math/auto-libm-test-in: Add more tests of ccos, ccosh, cexp,
	csin, csinh, ctan and ctanh.
	* math/auto-libm-test-out: Regenerated.
	* math/libm-test.inc (cexp_test): Use ALL_RM_TEST.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2015-06-24 21:04:51 +00:00
Torvald Riegel
c47ca9647f Fix atomic_full_barrier on x86 and x86_64. 
This fixes BZ #17403 by defining atomic_full_barrier,
atomic_read_barrier, and atomic_write_barrier on x86 and x86_64.  A full
barrier is implemented through an atomic idempotent modification to the
stack and not through using mfence because the latter can supposedly be
somewhat slower due to having to provide stronger guarantees wrt.
self-modifying code, for example.
 2015-06-23 19:20:52 +02:00
Joseph Myers
718d34a309 Fix csqrt spurious underflows (bug 18371). 
The csqrt implementations in glibc can cause spurious underflows in
some cases as a side-effect of the scaling for large arguments (when
underflow is correct for the square root of the argument that was
scaled down to avoid overflow, but not for the original argument).
This patch arranges to avoid the underflowing intermediate computation
(eliminating a multiplication in 0.5 in the problem cases where a
subsequent scaling by 2 would follow).

Tested for x86_64 and x86 and ulps updated accordingly (only needed
for x86).

	[BZ #18371]
	* math/s_csqrt.c (__csqrt): Avoid multiplication by 0.5 where
	intermediate but not final result might underflow.
	* math/s_csqrtf.c (__csqrtf): Likewise.
	* math/s_csqrtl.c (__csqrtl): Likewise.
	* math/auto-libm-test-in: Add more tests of csqrt.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
 2015-06-23 16:01:54 +00:00
Joseph Myers
554edb23ff Fix expm1 missing underflows (bug 16353). 
Similar to various other bugs in this area, some expm1 implementations
do not raise the underflow exception for subnormal arguments, when the
result is tiny and inexact.  This patch forces the exception in a
similar way to previous fixes.

(The issue does not apply to the ldbl-* implementations or to those
for x86 / x86_64 long double.  The change to
sysdeps/ieee754/dbl-64/wordsize-64/e_cosh.c is one I missed when
previously fixing bug 16354; the bug in that implementation was
previously latent, but the expm1 fixes stopped it being latent and so
required it to be fixed to avoid spurious underflows from cosh.)

Tested for x86_64 and x86.

	[BZ #16353]
	* sysdeps/i386/fpu/s_expm1.S (dbl_min): New object.
	(__expm1): Force underflow exception for arguments with small
	absolute value.
	* sysdeps/i386/fpu/s_expm1f.S (flt_min): New object.
	(__expm1f): Force underflow exception for arguments with small
	absolute value.
	* sysdeps/ieee754/dbl-64/s_expm1.c: Include <float.h>.
	(__expm1): Force underflow exception for arguments with small
	absolute value.
	* sysdeps/ieee754/flt-32/s_expm1f.c: Include <float.h>.
	(__expm1f): Force underflow exception for arguments with small
	absolute value.
	* sysdeps/ieee754/dbl-64/wordsize-64/e_cosh.c (__ieee754_cosh):
	Check for small arguments before calling __expm1.
	* math/auto-libm-test-in: Do not mark underflow exceptions as
	possibly missing for bug 16353.
	* math/auto-libm-test-out: Regenerated.
 2015-06-22 21:06:19 +00:00
Joseph Myers
cb0937b299 Fix x86_64 / x86 expm1l (-min_subnorm) result sign (bug 18569). 
In the x86 / x86_64 implementations of expm1l, when expm1l's result
should underflow to 0 (argument minus the least subnormal, in some
rounding modes), it can be a zero of the wrong sign.  This patch fixes
this by returning the argument with underflow forced in that case
(this is a 1ulp error relative to the correctly rounded result of -0,
which is OK in terms of the documented accuracy goals, whereas a
result with the wrong sign never is).

Tested for x86_64 and x86.

	[BZ #18569]
	* sysdeps/i386/fpu/e_expl.S (IEEE754_EXPL) [USE_AS_EXPM1L]: Force
	underflow and return argument in case of subnormal argument.
	* sysdeps/x86_64/fpu/e_expl.S (IEEE754_EXPL) [USE_AS_EXPM1L]:
	Likewise.
	* math/auto-libm-test-in: Add more tests of expm1.
	* math/auto-libm-test-out: Regenerated.
 2015-06-21 18:43:10 +00:00
Joseph Myers
7540cfc5a8 Fix x86 / x86_64 expl, exp10l missing underflows (bug 16361). 
Similar to various other bugs in this area, the x86 and x86_64
implementations of expl / exp10l can fail to produce underflow
exceptions when the unscaled result has trailing 0 bits so the scaling
down to subnormal precision is exact.  This patch fixes this by
forcing the exception in the case of tiny results.

Tested for x86_64 and x86.

	[BZ #16361]
	* sysdeps/i386/fpu/e_expl.S [!USE_AS_EXPM1L] (cmin): New object.
	[!USE_AS_EXPM1L] (IEEE754_EXPL): Force underflow exception for
	tiny results.
	* sysdeps/x86_64/fpu/e_expl.S [!USE_AS_EXPM1L] (cmin): New object.
	[!USE_AS_EXPM1L] (IEEE754_EXPL): Force underflow exception for
	tiny results.
	* math/auto-libm-test-in: Add more tests of exp and exp10.  Do not
	mark underflow exceptions as possibly missing for bug 16361.
	* math/auto-libm-test-out: Regenerated.
 2015-06-21 17:48:04 +00:00
Joseph Myers
8db3cdefef Fix asinh missing underflows (bug 16350). 
Similar to various other bugs in this area, some asinh implementations
do not raise the underflow exception for subnormal arguments, when the
result is tiny and inexact.  This patch forces the exception in a
similar way to previous fixes.

Tested for x86_64, x86 and mips64.

	[BZ #16350]
	* sysdeps/i386/fpu/s_asinh.S (__asinh): Force underflow exception
	for arguments with small absolute value.
	* sysdeps/i386/fpu/s_asinhf.S (__asinhf): Likewise.
	* sysdeps/i386/fpu/s_asinhl.S (__asinhl): Likewise.
	* sysdeps/ieee754/dbl-64/s_asinh.c: Include <float.h>.
	(__asinh): Force underflow exception for arguments with small
	absolute value.
	* sysdeps/ieee754/flt-32/s_asinhf.c: Include <float.h>.
	(__asinhf): Force underflow exception for arguments with small
	absolute value.
	* sysdeps/ieee754/ldbl-128/s_asinhl.c: Include <float.h>.
	(__asinhl): Force underflow exception for arguments with small
	absolute value.
	* sysdeps/ieee754/ldbl-128ibm/s_asinhl.c: Include <float.h>.
	(__asinhl): Force underflow exception for arguments with small
	absolute value.
	* sysdeps/ieee754/ldbl-96/s_asinhl.c: Include <float.h>.
	(__asinhl): Force underflow exception for arguments with small
	absolute value.
	* math/auto-libm-test-in: Do not mark underflow exceptions as
	possibly missing for bug 16350.
	* math/auto-libm-test-out: Regenerated.
 2015-06-18 23:27:41 +00:00
Joseph Myers
2f44ee08db Fix regcomp wcscoll, wcscmp namespace (bug 18497). 
regcomp brings in references to wcscoll, which isn't in all the
standards that contain regcomp.  In turn, wcscoll brings in references
to wcscmp, also not in all those standards.  This patch fixes this by
making those functions into weak aliases of __wcscoll and __wcscmp and
calling those names instead as needed.

Tested for x86_64 and x86 (testsuite, and that disassembly of
installed shared libraries is unchanged by the patch).

	[BZ #18497]
	* wcsmbs/wcscmp.c [!WCSCMP] (WCSCMP): Define as __wcscmp instead
	of wcscmp.
	(wcscmp): Define as weak alias of WCSCMP.
	* wcsmbs/wcscoll.c (STRCOLL): Define as __wcscoll instead of
	wcscoll.
	(USE_HIDDEN_DEF): Define.
	[!USE_IN_EXTENDED_LOCALE_MODEL] (wcscoll): Define as weak alias of
	__wcscoll.  Don't use libc_hidden_weak.
	* wcsmbs/wcscoll_l.c (STRCMP): Define as __wcscmp instead of
	wcscmp.
	* sysdeps/i386/i686/multiarch/wcscmp-c.c
	[SHARED] (libc_hidden_def): Define __GI___wcscmp instead of
	__GI_wcscmp.
	(weak_alias): Undefine and redefine.
	* sysdeps/i386/i686/multiarch/wcscmp.S (wcscmp): Rename to
	__wcscmp and define as weak alias of __wcscmp.
	* sysdeps/x86_64/wcscmp.S (wcscmp): Likewise.
	* include/wchar.h (__wcscmp): Declare.  Use libc_hidden_proto.
	(__wcscoll): Likewise.
	(wcscmp): Don't use libc_hidden_proto.
	(wcscoll): Likewise.
	* posix/regcomp.c (build_range_exp): Call __wcscoll instead of
	wcscoll.
	* posix/regexec.c (check_node_accept_bytes): Likewise.
	* conform/Makefile (test-xfail-XPG3/regex.h/linknamespace): Remove
	variable.
	(test-xfail-XPG4/regex.h/linknamespace): Likewise.
	(test-xfail-POSIX/regex.h/linknamespace): Likewise.
 2015-06-09 21:07:30 +00:00
Joseph Myers
1769608794 Use libc_hidden_proto / libc_hidden_def with __strnlen. 
Various code in glibc uses __strnlen instead of strnlen for namespace
reasons.  However, __strnlen does not use libc_hidden_proto /
libc_hidden_def (as is normally done for any function defined and
called within the same library, whether or not exported from the
library and whatever namespace it is in), so the compiler does not
know that those calls are to a function within libc.

This patch uses libc_hidden_proto / libc_hidden_def with __strnlen.
On x86_64, it makes no difference to the installed stripped shared
libraries.  On 32-bit x86, it causes __strnlen calls to go to the same
place as strnlen calls (the fallback strnlen implementation), rather
than through a PLT entry for the strnlen IFUNC; I'm not sure of the
logic behind when calls from within libc should use IFUNCs versus when
they should go direct to a particular function implementation, but
clearly it doesn't make sense for strnlen and __strnlen to be handled
differently in this regard.

Tested for x86_64 and x86 (testsuite, and comparison of installed
shared libraries as described above).

	* string/strnlen.c [!STRNLEN] (__strnlen): Use libc_hidden_def.
	* include/string.h (__strnlen): Use libc_hidden_proto.
	* sysdeps/aarch64/strnlen.S (__strnlen): Use libc_hidden_def.
	* sysdeps/i386/i686/multiarch/strnlen-c.c [SHARED]
	(libc_hidden_def): Define __GI___strnlen as well as __GI_strnlen.
	* sysdeps/powerpc/powerpc32/power4/multiarch/strnlen-power7.S
	(libc_hidden_def): Undefine and redefine.
	* sysdeps/powerpc/powerpc32/power4/multiarch/strnlen-ppc32.c
	[SHARED] (libc_hidden_def): Define __GI___strnlen as well as
	__GI_strnlen.
	* sysdeps/powerpc/powerpc32/power7/strnlen.S (__strnlen): Use
	libc_hidden_def.
	* sysdeps/tile/tilegx/strnlen.c (__strnlen): Likewise.
 2015-06-02 20:24:25 +00:00
Joseph Myers
526af54142 Fix i386 atanhl spurious underflows (bug 18049). 
The i386 implementation of atanhl, for small arguments, does a
calculation that involves computing twice the square of the argument,
resulting in spurious underflows for some arguments.  This patch fixes
this by just returning the argument when its exponent is below -32,
with underflow being forced as needed for subnormal arguments.

Tested for x86 and x86_64.

	[BZ #18049]
	* sysdeps/i386/fpu/e_atanhl.S (__ieee754_atanhl): For exponents
	below -32, return the argument, with underflow if subnormal.
	* math/auto-libm-test-in: Add more tests of atanh.
	* math/auto-libm-test-out: Regenerated.
 2015-05-19 23:05:22 +00:00
Joseph Myers
8020a80887 Fix atanhl missing underflows (bug 16352). 
Similar to various other bugs in this area, some atanh implementations
do not raise the underflow exception for subnormal arguments, when the
result is tiny and inexact.  This patch forces the exception in a
similar way to previous fixes.  (No change in this regard is needed
for the i386 implementation; special handling to force underflows in
these cases will only be needed there when the spurious underflows,
bug 18049, get fixed.)

Tested for x86_64, x86, powerpc and mips64.

	[BZ #16352]
	* sysdeps/i386/fpu/e_atanh.S (dbl_min): New object.
	(__ieee754_atanh): Force underflow exception for results with
	small absolute value.
	* sysdeps/i386/fpu/e_atanhf.S (flt_min): New object.
	(__ieee754_atanhf): Force underflow exception for results with
	small absolute value.
	* sysdeps/ieee754/dbl-64/e_atanh.c: Include <float.h>.
	(__ieee754_atanh): Force underflow exception for results with
	small absolute value.
	* sysdeps/ieee754/flt-32/e_atanhf.c: Include <float.h>.
	(__ieee754_atanhf): Force underflow exception for results with
	small absolute value.
	* sysdeps/ieee754/ldbl-128/e_atanhl.c: Include <float.h>.
	(__ieee754_atanhl): Force underflow exception for results with
	small absolute value.
	* sysdeps/ieee754/ldbl-128ibm/e_atanhl.c: Include <float.h>.
	(__ieee754_atanhl): Force underflow exception for results with
	small absolute value.
	* sysdeps/ieee754/ldbl-96/e_atanhl.c: Include <float.h>.
	(__ieee754_atanhl): Force underflow exception for results with
	small absolute value.
	* math/auto-libm-test-in: Do not allow missing underflow
	exceptions from atanh.
	* math/auto-libm-test-out: Regenerated.
 2015-05-15 22:07:57 +00:00
Joseph Myers
0b7a5f9201 Fix log1p missing underflows (bug 16339). 
Similar to various other bugs in this area, some log1p implementations
do not raise the underflow exception for subnormal arguments, when the
result is tiny and inexact.  This patch forces the exception in a
similar way to previous fixes.  (The ldbl-128ibm implementation
doesn't currently need any change as it already generates this
exception, albeit through code that would generate spurious exceptions
in other cases; special code for this issue will only be needed there
when fixing the spurious exceptions.)

Tested for x86_64, x86, powerpc and mips64.

	[BZ #16339]
	* sysdeps/i386/fpu/s_log1p.S (dbl_min): New object.
	(__log1p): Force underflow exception for results with small
	absolute value.
	* sysdeps/i386/fpu/s_log1pf.S (flt_min): New object.
	(__log1pf): Force underflow exception for results with small
	absolute value.
	* sysdeps/ieee754/dbl-64/s_log1p.c: Include <float.h>.
	(__log1p): Force underflow exception for results with small
	absolute value.
	* sysdeps/ieee754/flt-32/s_log1pf.c: Include <float.h>.
	(__log1pf): Force underflow exception for results with small
	absolute value.
	* sysdeps/ieee754/ldbl-128/s_log1pl.c: Include <float.h>.
	(__log1pl): Force underflow exception for results with small
	absolute value.
	* math/auto-libm-test-in: Do not allow missing underflow
	exceptions from log1p.
	* math/auto-libm-test-out: Regenerated.
 2015-05-14 23:38:07 +00:00
Joseph Myers
14f36098f2 Add more tests of csqrt, lgamma, log10, sinh. 
This patch adds more randomly-generated tests of various libm
functions that are observed to increase ulps on x86_64.

Tested for x86_64 and x86 and ulps updated accordingly.

	* math/auto-libm-test-in: Add more tests of csqrt, lgamma, log10
	and sinh.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2015-05-08 17:55:11 +00:00
Joseph Myers
471dffa12c Add more tests of acosh, atanh, cos, csqrt, erfc, sin, sincos. 
This patch adds more randomly-generated tests of various libm
functions that are observed to increase ulps on x86_64.

Tested for x86_64 and x86 and ulps updated accordingly.

	* math/auto-libm-test-in: Add more tests of acosh, atanh, cos,
	csqrt, erfc, sin and sincos.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
 2015-05-06 17:30:18 +00:00