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a84e78c8b3
glibc/sysdeps/i386/fpu
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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
..
doasin.c
e_acos.S Fix x86 acos near 1 (bug 13942). 2012-04-30 18:56:39 +00:00
e_acosf.S Fix acos (-1) in round-downwards mode on x86 (bug 14034). 2012-04-30 09:38:06 +00:00
e_acosh.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
e_acoshf.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
e_acoshl.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
e_acosl.c Fix x86 acos near 1 (bug 13942). 2012-04-30 18:56:39 +00:00
e_asin.S Fix x86 acos near 1 (bug 13942). 2012-04-30 18:56:39 +00:00
e_asinf.S Optimize libm 2011-10-12 11:27:51 -04:00
e_atan2.S Optimize libm 2011-10-12 11:27:51 -04:00
e_atan2f.S Optimize libm 2011-10-12 11:27:51 -04:00
e_atan2l.c Optimize libm 2011-10-12 11:27:51 -04:00
e_atanh.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
e_atanhf.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
e_atanhl.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
e_exp2.S Optimize libm 2011-10-12 11:27:51 -04:00
e_exp2f.S Optimize libm 2011-10-12 11:27:51 -04:00
e_exp2l.S Optimize libm 2011-10-12 11:27:51 -04:00
e_exp10.S Optimize libm 2011-10-12 11:27:51 -04:00
e_exp10f.S Optimize libm 2011-10-12 11:27:51 -04:00
e_exp10l.S Fix exp10 inaccuracy and exceptions (bugs 13884, 13914). 2012-05-06 18:23:44 +00:00
e_exp.S Optimize exp 2011-10-15 20:22:59 -04:00
e_expf.S Optimize exp 2011-10-15 20:22:59 -04:00
e_expl.S Fix x86/x86_64 expl/exp10l spurious underflows (bug 16348). 2014-03-27 18:41:14 +00:00
e_fmod.S Optimize libm 2011-10-12 11:27:51 -04:00
e_fmodf.S Optimize libm 2011-10-12 11:27:51 -04:00
e_fmodl.c Optimize libm 2011-10-12 11:27:51 -04:00
e_hypot.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
e_hypotf.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
e_ilogb.S Remove useless __ilogb*_finite aliases 2012-04-18 00:40:13 +02:00
e_ilogbf.S Remove useless __ilogb*_finite aliases 2012-04-18 00:40:13 +02:00
e_ilogbl.S Remove useless __ilogb*_finite aliases 2012-04-18 00:40:13 +02:00
e_log2.S Get rid of ASM_TYPE_DIRECTIVE{,_PREFIX}. 2012-08-02 21:04:29 +02:00
e_log2f.S Get rid of ASM_TYPE_DIRECTIVE{,_PREFIX}. 2012-08-02 21:04:29 +02:00
e_log2l.S Get rid of ASM_TYPE_DIRECTIVE{,_PREFIX}. 2012-08-02 21:04:29 +02:00
e_log10.S Get rid of ASM_TYPE_DIRECTIVE{,_PREFIX}. 2012-08-02 21:04:29 +02:00
e_log10f.S Get rid of ASM_TYPE_DIRECTIVE{,_PREFIX}. 2012-08-02 21:04:29 +02:00
e_log10l.S Get rid of ASM_TYPE_DIRECTIVE{,_PREFIX}. 2012-08-02 21:04:29 +02:00
e_log.S Fix log (1) in round-downward mode (bug 16731). 2014-03-21 18:13:58 +00:00
e_logf.S Fix log (1) in round-downward mode (bug 16731). 2014-03-21 18:13:58 +00:00
e_logl.S Fix log (1) in round-downward mode (bug 16731). 2014-03-21 18:13:58 +00:00
e_pow.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
e_powf.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
e_powl.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
e_rem_pio2.c
e_remainder.S Optimize libm 2011-10-12 11:27:51 -04:00
e_remainderf.S Optimize libm 2011-10-12 11:27:51 -04:00
e_remainderl.S Optimize libm 2011-10-12 11:27:51 -04:00
e_scalb.S Get rid of ASM_TYPE_DIRECTIVE{,_PREFIX}. 2012-08-02 21:04:29 +02:00
e_scalbf.S Get rid of ASM_TYPE_DIRECTIVE{,_PREFIX}. 2012-08-02 21:04:29 +02:00
e_scalbl.S Get rid of ASM_TYPE_DIRECTIVE{,_PREFIX}. 2012-08-02 21:04:29 +02:00
e_sqrt.S Fix x86 sqrt rounding (bug 14032). 2013-11-29 16:31:16 +00:00
e_sqrtf.S Optimize libm 2011-10-12 11:27:51 -04:00
e_sqrtl.c Optimize libm 2011-10-12 11:27:51 -04:00
fclrexcpt.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
fedisblxcpt.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
feenablxcpt.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
fegetenv.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
fegetexcept.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
fegetround.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
feholdexcpt.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
fenv_private.h Set/restore rounding mode only when needed 2013-06-12 10:36:48 +05:30
fesetenv.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
fesetround.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
feupdateenv.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
fgetexcptflg.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
fraiseexcpt.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
fsetexcptflg.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
ftestexcept.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
halfulp.c
Implies Use x86_64 fpu/bits/fenv.h for i386 and x86_64 2012-06-06 10:13:19 -07:00
k_rem_pio2l.c
libm-test-ulps Fix catan, catanh, __ieee754_logf in round-downward mode (bug 16799, bug 16800). 2014-04-02 17:41:02 +00:00
math_private.h Optimize private 387 fenv access; share code between i386 and x86_64. 2012-03-19 06:51:39 -07:00
math-tests.h Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
mpatan2.c
mpatan.c
mpexp.c
mplog.c
mpsqrt.c
s_asinh.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_asinhf.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_asinhl.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_atan.S
s_atanf.S
s_atanl.c
s_cbrt.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_cbrtf.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_cbrtl.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_ceil.S
s_ceilf.S
s_ceill.S
s_copysign.S
s_copysignf.S
s_copysignl.S
s_expm1.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_expm1f.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_expm1l.S Fix x86/x86_64 expm1l inaccuracy and exceptions (bugs 13885, 13923). 2012-05-07 19:13:08 +00:00
s_fabs.S
s_fabsf.S
s_fabsl.S
s_fdim.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_fdimf.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_fdiml.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_finite.S
s_finitef.S
s_finitel.S
s_floor.S
s_floorf.S
s_floorl.S
s_fmax.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_fmaxf.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_fmaxl.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_fmin.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_fminf.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_fminl.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_fpclassifyl.c Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_frexp.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_frexpf.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_frexpl.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_isinfl.c Use <> for math.h and math_private.h everywhere. 2012-03-09 16:09:10 -08:00
s_isnanl.c Use <> for math.h and math_private.h everywhere. 2012-03-09 16:09:10 -08:00
s_llrint.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_llrintf.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_llrintl.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_log1p.S Remove __ELF__ conditionals 2012-02-07 00:41:11 +01:00
s_log1pf.S Remove __ELF__ conditionals 2012-02-07 00:41:11 +01:00
s_log1pl.S Remove __ELF__ conditionals 2012-02-07 00:41:11 +01:00
s_logb.S
s_logbf.S
s_logbl.c
s_lrint.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_lrintf.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_lrintl.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_nearbyint.S
s_nearbyintf.S
s_nearbyintl.S
s_nextafterl.c Fix nextafter overflow in non-default rounding modes (bug 16677). 2014-03-11 22:24:00 +00:00
s_nexttoward.c Fix nexttoward bugs (bugs 2550, 2570). 2012-05-01 15:37:43 +00:00
s_nexttowardf.c Fix nexttoward bugs (bugs 2550, 2570). 2012-05-01 15:37:43 +00:00
s_remquo.S Remove remaining bounded-pointers support from i386 .S files. 2013-02-21 22:21:52 +00:00
s_remquof.S Remove remaining bounded-pointers support from i386 .S files. 2013-02-21 22:21:52 +00:00
s_remquol.S Remove remaining bounded-pointers support from i386 .S files. 2013-02-21 22:21:52 +00:00
s_rint.S
s_rintf.S
s_rintl.c
s_scalbln.c
s_scalblnf.c
s_scalblnl.c
s_scalbn.S
s_scalbnf.S
s_scalbnl.S
s_significand.S
s_significandf.S
s_significandl.c
s_trunc.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_truncf.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
s_truncl.S Update copyright notices with scripts/update-copyrights 2014-01-01 22:00:23 +10:00
slowexp.c
slowpow.c
t_exp.c
Versions
w_sqrt.c Fix x86 sqrt rounding (bug 14032). 2013-11-29 16:31:16 +00:00