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8d3f9e85cf
glibc/sysdeps
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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
..
aarch64 Remove all target specific __ieee754_sqrt(f/l) inlines 2018-03-15 19:21:36 +00:00
alpha Remove all target specific __ieee754_sqrt(f/l) inlines 2018-03-15 19:21:36 +00:00
arm hurd: add gscope support 2018-03-11 13:06:33 +01:00
generic hurd: add TLS support 2018-03-17 03:17:36 +01:00
gnu Add TCP_FASTOPEN_KEY, TCP_FASTOPEN_NO_COOKIE from Linux 4.15. 2018-02-06 00:42:22 +00:00
hppa hurd: add gscope support 2018-03-11 13:06:33 +01:00
i386 Add narrowing subtract functions. 2018-03-20 00:34:52 +00:00
ia64 hurd: add gscope support 2018-03-11 13:06:33 +01:00
ieee754 Add narrowing subtract functions. 2018-03-20 00:34:52 +00:00
init_array sysdeps/init_array: Add PREINIT_FUNCTION to crti.S 2018-01-29 10:22:26 -08:00
m68k Revert m68k __ieee754_sqrt change 2018-03-16 14:25:41 +00:00
mach Add narrowing subtract functions. 2018-03-20 00:34:52 +00:00
microblaze hurd: add gscope support 2018-03-11 13:06:33 +01:00
mips hurd: add gscope support 2018-03-11 13:06:33 +01:00
nios2 hurd: add gscope support 2018-03-11 13:06:33 +01:00
nptl Refactor Linux ARCH_FORK implementation 2018-03-07 17:39:40 -03:00
posix Add missing start-of-file descriptive comment. 2018-03-06 09:21:04 +01:00
powerpc Add narrowing subtract functions. 2018-03-20 00:34:52 +00:00
pthread hurd: fix timer_routines.c build 2018-02-27 01:15:39 +01:00
riscv hurd: add gscope support 2018-03-11 13:06:33 +01:00
s390 Remove all target specific __ieee754_sqrt(f/l) inlines 2018-03-15 19:21:36 +00:00
sh hurd: add gscope support 2018-03-11 13:06:33 +01:00
sparc Remove all target specific __ieee754_sqrt(f/l) inlines 2018-03-15 19:21:36 +00:00
tile hurd: add gscope support 2018-03-11 13:06:33 +01:00
unix Add narrowing subtract functions. 2018-03-20 00:34:52 +00:00
wordsize-32 Use libc_hidden_* for strtoumax (bug 15105). 2018-02-28 14:16:21 +00:00
wordsize-64 Use libc_hidden_* for strtoumax (bug 15105). 2018-02-28 14:16:21 +00:00
x86 Remove sysdeps/x86/fpu/bits/mathinline.h __finite inline. 2018-03-16 18:36:53 +00:00
x86_64 Remove all target specific __ieee754_sqrt(f/l) inlines 2018-03-15 19:21:36 +00:00