glibc/sysdeps/unix/sysv/linux/s390
Joseph Myers 55a38f8236 Add llogb, llogbf, llogbl.
TS 18661-1 defines llogb functions that are like ilogb except that
they return long int instead of int.  Corresponding FP_LLOGB* macros
are defined, whose values are required to have the obvious
correspondence to those of the FP_ILOGB* macros.

This patch implements these functions and macros for glibc.  llogb
uses the type-generic infrastructure, with an implementation similar
to the wrapper for ilogb but with additional conversion from FP_ILOGB*
to FP_LLOGB*; this approach avoids needing to modify or duplicate any
of the architecture-specific ilogb implementations.  Tests are also
based on those for ilogb.

Ideally the llogb functions would alias the ilogb ones when long is
32-bit, but such aliasing requires the associated header declarations
of the different-type alias to be hidden, typically by defining macros
before including the header (see e.g. how
sysdeps/ieee754/dbl-64/wordsize-64/s_llround.c defines lround to
__hidden_lround before including <math.h>).  The infrastructure for
type-generic function implementations does not support defining such
macros at present (since C code can't define a macro whose name is
determined by other macros).  So this patch leaves them as separate
functions (similar to e.g. scalbln and scalbn being separate in such a
case as well), but with the remapping of FP_ILOGB* to FP_LLOGB*
conditioned out in the case where it would be the identity map.

Tested for x86_64, x86, mips64 and powerpc.

	* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (llogb):
	New declaration.
	* math/tgmath.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (llogb): New
	macro.
	* math/math.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (__FP_LONG_MAX):
	New macro.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FP_LLOGB0): Likewise.
	[__GLIBC_USE (IEC_60559_BFP_EXT)] (FP_LLOGBNAN): Likewise.
	* math/Versions (llogb): New libm symbol at version GLIBC_2.25.
	(llogbf): Likewise.
	(llogbl): Likewise.
	* math/Makefile (gen-libm-calls): Add w_llogbF.
	(tests): Add test-fp-llogb-constants.
	* math/w_llogb_template.c: New file.  Based on
	math/w_ilogb_template.c.
	* math/libm-test.inc (llogb_test_data): New array.
	(llogb_test): New function.
	(main): Call llogb_test.
	* math/test-fp-llogb-constants.c: New file.  Based on
	math/test-fp-ilogb-constants.c.
	* math/test-tgmath-ret.c (llogb): New CHECK_RET_CONST call.
	(do_test): Call check_return_llogb.
	* math/test-tgmath.c (NCALLS): Increase to 126.
	(F(compile_test)): Call llogb.
	(F(llogb)): New function.
	* manual/math.texi (Exponents and Logarithms): Document llogb,
	llogbf, llogbl, FP_LLOGB0 and FP_LLOGBNAN.
	* manual/libm-err-tab.pl (@all_functions): Add llogb.
	* sysdeps/ieee754/ldbl-opt/nldbl-llogb.c: New file.
	* sysdeps/ieee754/ldbl-opt/w_llogbl.c: Likewise.
	* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add llogb.
	(CFLAGS-nldbl-llogb.c): New variable.
	* 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.
2016-12-02 01:42:49 +00:00
..
bits Consolidate Linux setrlimit and getrlimit implementation 2016-11-17 15:54:22 -02:00
fpu
s390-32 Add llogb, llogbf, llogbl. 2016-12-02 01:42:49 +00:00
s390-64 Add llogb, llogbf, llogbl. 2016-12-02 01:42:49 +00:00
sys Minor correction to the "installed header hygiene" patches. 2016-09-28 07:19:59 -04:00
arch-fork.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
brk.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
configure
configure.ac
dl-cache.h
dl-procinfo.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
elision-conf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
elision-conf.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
elision-lock.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
elision-timed.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
elision-trylock.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
elision-unlock.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
force-elision.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
Implies
init-first.c S390: Add support for vdso getcpu symbol. 2016-05-09 11:05:45 +02:00
jmp-unwind.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
kernel-features.h Adjust kernel-features.h defaults for recvmsg and sendmsg 2016-05-25 17:27:57 -03:00
ldconfig.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ldd-rewrite.sed
libanl.abilist Simplify the abilist format 2015-11-06 13:58:53 +01:00
libc-vdso.h S390: Add support for vdso getcpu symbol. 2016-05-09 11:05:45 +02:00
localplt.data ld.so: Remove __libc_memalign 2016-11-30 16:23:58 +01:00
longjmp_chk.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
lowlevellock.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
Makefile Do not override objects in libc.a in other static libraries [BZ #20452] 2016-08-17 14:57:01 +02:00
nldbl-abi.h
opensock.c
pt-longjmp.c Use libc_ifunc macro for siglongjmp, longjmp in libpthread. 2016-10-07 10:12:48 +02:00
pt-vfork.S
pthread_mutex_cond_lock.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
pthread_mutex_lock.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
pthread_mutex_timedlock.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
pthread_mutex_trylock.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
readelflib.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
rt-sysdep.S
sa_len.c
semtimedop.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sigcontextinfo.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
sysconf.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
system.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ucontext_i.sym
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