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a84e78c8b3
glibc/sysdeps/i386
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Joseph Myers a84e78c8b3 Fix catan, catanh, __ieee754_logf in round-downward mode (bug 16799, bug 16800). 
This patch fixes incorrect results from catan and catanh of certain
special inputs in round-downward mode (bug 16799), and incorrect
results of __ieee754_logf (+/-0) in round-downward mode (bug 16800)
that show up through catan/catanh when tested in all rounding modes,
but not directly in the testing for logf because the bug gets hidden
by the wrappers.

Both bugs involve a zero that should be +0 being -0 instead: one
computed as (1-x)*(1+x) in the catan/catanh case, and one as (x-x) in
the logf case.  The fixes ensure positive zero is used.  Testing of
catan and catanh in all rounding modes is duly enabled.

I expect there are various other bugs in special cases in __ieee754_*
functions that are normally hidden by the wrappers but would show up
for testing with -lieee (or in future with -fno-math-errno if we
replace -lieee and _LIB_VERSION with compile-time redirection to new
*_noerrno symbol names).

Tested x86_64 and x86 and ulps updated accordingly.

	[BZ #16799]
	[BZ #16800]
	* math/s_catan.c (__catan): Avoid passing -0 denominator to atan2
	with 0 numerator.
	* math/s_catanf.c (__catanf): Likewise.
	* math/s_catanh.c (__catanh): Likewise.
	* math/s_catanhf.c (__catanhf): Likewise.
	* math/s_catanhl.c (__catanhl): Likewise.
	* math/s_catanl.c (__catanl): Likewise.
	* sysdeps/ieee754/flt-32/e_logf.c (__ieee754_logf): Always divide
	by positive zero when computing -Inf result.
	* math/libm-test.inc (catan_test): Use ALL_RM_TEST.
	(catanh_test): Likewise.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
2014-04-02 17:41:02 +00:00
..
fpu Fix catan, catanh, __ieee754_logf in round-downward mode (bug 16799, bug 16800). 2014-04-02 17:41:02 +00:00
i486 Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
i586 Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
i686 Fix log (1) in round-downward mode (bug 16731). 2014-03-21 18:13:58 +00:00
i786 Also applying directories. 1999-01-24 10:39:22 +00:00
sys Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
____longjmp_chk.S Add sigstack handling to Linux ____longjmp_chk on i386. 2009-07-30 21:50:14 -07:00
__longjmp.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
abort-instr.h update from main archive 961220 1996-12-21 04:13:58 +00:00
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
asm-syntax.h 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.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
configure rename configure.in to configure.ac 2013-10-30 17:32:08 +10:00
configure.ac rename configure.in to configure.ac 2013-10-30 17:32:08 +10:00
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-procinfo.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
dl-procinfo.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
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.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
ffs.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
gccframe.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
gmp-mparam.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
htons.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
i386-mcount.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
Implies Use x86-64 bits/byteswap.h for both i386 and x86_64 2012-05-30 14:13:18 -07:00
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
ldbl2mpn.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
ldsodefs.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
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 Support crti.S and crtn.S provided directly by architectures. 2012-02-08 01:45:26 +00:00
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
memcopy.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
memset.c 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 Update. 2002-03-14 20:48:50 +00:00
mul_1.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
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
setfpucw.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 BZ #15754: CVE-2013-4788 2013-09-23 00:52:09 -04:00
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.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
stpncpy.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
strcspn.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
string-inlines.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
strlen.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
strpbrk.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
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 Remove remaining bounded-pointers support from i386 .S files. 2013-02-21 22:21:52 +00:00
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 Split tls-macros.h into sysdeps directories. 2012-07-17 11:30:58 +00:00
tlsdesc.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
tlsdesc.sym Introduce TLS descriptors for i386 and x86_64. 2008-05-13 05:41:30 +00:00
tst-audit.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
tst-stack-align.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
Versions Merge sysdeps/i386/elf/Versions into sysdeps/i386/Versions. 2012-03-19 21:02:40 +01:00