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glibc/sysdeps/x86_64
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Joseph Myers f8ba1b5654 Fix log2 (1) in round-downward mode (bug 17042). 
As with other issues of this kind, bug 17042 is log2 (1) wrongly
returning -0 instead of +0 in round-downward mode because of
implementations effectively in terms of log1p (x - 1).  This patch
fixes the issue in the same way used for log and log10.

Tested x86_64 and x86 and ulps updated accordingly.  Also tested for
mips64 to confirm a fix was needed for ldbl-128 and to validate that
fix (also applied to ldbl-128ibm since that version of log2l is
essentially the same as the ldbl-128 one).

	[BZ #17042]
	* sysdeps/i386/fpu/e_log2.S (__ieee754_log2): Take absolete value
	when x - 1 is zero.
	* sysdeps/i386/fpu/e_log2f.S (__ieee754_log2f): Likewise.
	* sysdeps/i386/fpu/e_log2l.S (__ieee754_log2l): Likewise.
	* sysdeps/ieee754/ldbl-128/e_log2l.c (__ieee754_log2l): Return
	0.0L for an argument of 1.0L.
	* sysdeps/ieee754/ldbl-128ibm/e_log2l.c (__ieee754_log2l):
	Likewise.
	* sysdeps/x86_64/fpu/e_log2l.S (__ieee754_log2l): Take absolute
	value when x - 1 is zero.
	* math/libm-test.inc (log2_test): Use ALL_RM_TEST.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
2014-06-10 12:07:15 +00:00
..
64
bits Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
fpu Fix log2 (1) in round-downward mode (bug 17042). 2014-06-10 12:07:15 +00:00
multiarch Fix -Wundef warning for FEATURE_INDEX_1. 2014-05-03 00:25:21 -04:00
nptl Move NPTL public ABI headers for x86 to sysdeps/x86/nptl/. 2014-05-14 09:44:56 -07:00
x32 Include generic symbol-hacks.h for x32 2014-01-20 11:11:01 -08:00
____longjmp_chk.S
__longjmp.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
_mcount.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
abort-instr.h
add_n.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
addmul_1.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
backtrace.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
bsd-_setjmp.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
bsd-setjmp.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
bzero.S
cacheinfo.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
configure Save/restore bound registers in _dl_runtime_resolve 2014-04-09 15:38:09 -07:00
configure.ac Save/restore bound registers in _dl_runtime_resolve 2014-04-09 15:38:09 -07:00
crti.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
crtn.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
dl-irel.h Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
dl-lookupcfg.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
dl-machine.h Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
dl-runtime.c
dl-tls.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
dl-tlsdesc.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
dl-tlsdesc.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
dl-trampoline.h Save/restore bound registers for _dl_runtime_profile 2014-04-16 14:46:49 -07:00
dl-trampoline.S Save/restore bound registers for _dl_runtime_profile 2014-04-16 14:46:49 -07:00
ffs.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
ffsll.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
hp-timing.c
hp-timing.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
htonl.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
Implies
jmpbuf-offsets.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
jmpbuf-unwind.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
l10nflist.c
ldbl2mpn.c
ldsodefs.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
link-defines.sym Replace __int128 with __int128_t 2014-05-30 10:50:21 -07:00
locale-defines.sym
lshift.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
machine-gmon.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
Makefile Save and restore AVX-512 zmm registers to x86-64 ld.so 2014-03-13 11:19:08 -07:00
memchr.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
memcmp.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
memcpy_chk.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
memcpy.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
memmove.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
mempcpy_chk.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
mempcpy.S
memrchr.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
memset_chk.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
memset.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
memusage.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
mp_clz_tab.c
mul_1.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
preconfigure
preconfigure.ac
rawmemchr.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
rshift.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
rtld-memcmp.c
rtld-memset.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
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sched_cpucount.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
setjmp.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
stackguard-macros.h
stackinfo.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
start.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
stpcpy_chk.S
stpcpy.S
strcasecmp_l-nonascii.c
strcasecmp_l.S
strcasecmp.S
strcat.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
strchr.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
strchrnul.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
strcmp.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
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strlen.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
strncase_l-nonascii.c
strncase_l.S
strncase.S
strncmp.S
strnlen.S
strpbrk.S
strrchr.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
strspn.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
strtok_r.S
strtok.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
sub_n.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
submul_1.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
sysdep.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
tls-macros.h
tlsdesc.c Factor mmap/munmap of PT_LOAD segments out of _dl_map_object_from_fd et al. 2014-04-03 10:47:14 -07:00
tlsdesc.sym
tst-audit3.c
tst-audit4.c
tst-audit5.c
tst-audit6.c
tst-audit7.c
tst-audit10.c Save and restore AVX-512 zmm registers to x86-64 ld.so 2014-03-13 11:19:08 -07:00
tst-audit.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
tst-auditmod3a.c
tst-auditmod3b.c
tst-auditmod4a.c
tst-auditmod4b.c
tst-auditmod5a.c
tst-auditmod5b.c
tst-auditmod6a.c
tst-auditmod6b.c
tst-auditmod6c.c
tst-auditmod7a.c
tst-auditmod7b.c
tst-auditmod10a.c Save and restore AVX-512 zmm registers to x86-64 ld.so 2014-03-13 11:19:08 -07:00
tst-auditmod10b.c Save and restore AVX-512 zmm registers to x86-64 ld.so 2014-03-13 11:19:08 -07:00
tst-mallocalign1.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
tst-quad1.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
tst-quad1pie.c
tst-quad2.c
tst-quad2pie.c
tst-quadmod1.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
tst-quadmod1pie.S
tst-quadmod2.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
tst-quadmod2pie.S
tst-stack-align.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
Versions
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