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glibc/sysdeps/i386/fpu
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Joseph Myers a91fd168a0 Fix x86_64/x86 powl handling of sNaN arguments (bug 20916). 
The x86_64/x86 powl implementations mishandle sNaN arguments, both by
returning sNaN in some cases (instead of doing arithmetic on the
arguments to produce the result when NaN arguments result in NaN
results) and by treating sNaN the same as qNaN for arguments (1, sNaN)
and (sNaN, 0), contrary to TS 18661-1 which requires those cases to
return qNaN instead of 1.

This patch makes the x86_64/x86 powl implementations follow TS 18661-1
semantics for sNaN arguments; sNaN tests are also added for pow.
Given the problems with testing float and double sNaN arguments on
32-bit x86 (sNaN tests disabled because the compiler may convert
unnecessarily to a qNaN when passing arguments), no changes are made
to the powf and pow implementations there.

Tested for x86_64 and x86.

	[BZ #20916]
	* sysdeps/i386/fpu/e_powl.S (__ieee754_powl): Do not return 1 for
	arguments (sNaN, 0) or (1, sNaN).  Do arithmetic on NaN arguments
	to compute result.
	* sysdeps/x86_64/fpu/e_powl.S (__ieee754_powl): Likewise.
	* math/libm-test.inc (pow_test_data): Add tests of sNaN arguments.
2016-12-06 00:33:19 +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 dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
e_acoshf.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
e_acoshl.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
e_acosl.c Fix x86 acos near 1 (bug 13942). 2012-04-30 18:56:39 +00:00
e_asin.S Refactor i386 libm code forcing underflow exceptions. 2015-09-24 21:41:00 +00:00
e_asinf.S Refactor i386 libm code forcing underflow exceptions. 2015-09-24 21:41:00 +00:00
e_atan2.S Refactor i386 libm code forcing underflow exceptions. 2015-09-24 21:41:00 +00:00
e_atan2f.S Refactor i386 libm code forcing underflow exceptions. 2015-09-24 21:41:00 +00:00
e_atan2l.c
e_atanh.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
e_atanhf.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
e_atanhl.S Fix i386 atanhl (sNaN) (bug 20219). 2016-06-07 23:08:32 +00:00
e_exp2.S Avoid excess range in results from i386 exp, hypot, pow functions (bug 18980). 2015-09-18 21:53:22 +00:00
e_exp2f.S Avoid excess range in results from i386 exp, hypot, pow functions (bug 18980). 2015-09-18 21:53:22 +00:00
e_exp2l.S Refactor i386 libm code forcing underflow exceptions. 2015-09-24 21:41:00 +00:00
e_exp10.S Avoid excess range in results from i386 exp, hypot, pow functions (bug 18980). 2015-09-18 21:53:22 +00:00
e_exp10f.S Avoid excess range in results from i386 exp, hypot, pow functions (bug 18980). 2015-09-18 21:53:22 +00:00
e_exp10l.S Fix exp10 inaccuracy and exceptions (bugs 13884, 13914). 2012-05-06 18:23:44 +00:00
e_exp.S Avoid excess range in results from i386 exp, hypot, pow functions (bug 18980). 2015-09-18 21:53:22 +00:00
e_expf.S Avoid excess range in results from i386 exp, hypot, pow functions (bug 18980). 2015-09-18 21:53:22 +00:00
e_expl.S Fix i386/x86_64 expl, exp10l, expm1l for sNaN input (bug 20226). 2016-06-08 21:55:06 +00:00
e_fmod.S
e_fmodf.S
e_fmodl.c
e_hypot.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
e_hypotf.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
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 Fix log2 (1) in round-downward mode (bug 17042). 2014-06-10 12:07:15 +00:00
e_log2f.S Fix log2 (1) in round-downward mode (bug 17042). 2014-06-10 12:07:15 +00:00
e_log2l.S Fix i386/x86_64 log2l (sNaN) (bug 20235). 2016-06-09 18:04:30 +00:00
e_log10.S Fix log10 (1) in round-downward mode (bug 16977). 2014-05-23 12:07:50 +00:00
e_log10f.S Fix log10 (1) in round-downward mode (bug 16977). 2014-05-23 12:07:50 +00:00
e_log10l.S Fix i386/x86_64 log10l (sNaN) (bug 20228). 2016-06-08 22:59:18 +00:00
e_log.S Fix i386/x86_64 log* (1) zero sign for -ffinite-math-only (bug 19213). 2015-11-05 21:56:31 +00:00
e_logf.S Fix i386/x86_64 log* (1) zero sign for -ffinite-math-only (bug 19213). 2015-11-05 21:56:31 +00:00
e_logl.S Fix i386/x86_64 logl (sNaN) (bug 20227). 2016-06-08 22:24:06 +00:00
e_pow.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
e_powf.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
e_powl.S Fix x86_64/x86 powl handling of sNaN arguments (bug 20916). 2016-12-06 00:33:19 +00:00
e_rem_pio2.c
e_remainder.S
e_remainderf.S
e_remainderl.S
e_scalb.S Avoid excess range in results from i386 scalb functions (bug 18981). 2015-09-18 20:34:59 +00:00
e_scalbf.S Avoid excess range in results from i386 scalb functions (bug 18981). 2015-09-18 20:34:59 +00:00
e_scalbl.S Fix i386/x86_64 scalbl with sNaN input (bug 20296). 2016-06-23 22:17:41 +00:00
e_sqrt.S Fix x86 sqrt rounding (bug 14032). 2013-11-29 16:31:16 +00:00
e_sqrtf.S
e_sqrtl.c
fclrexcpt.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
fedisblxcpt.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
feenablxcpt.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
fegetenv.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
fegetexcept.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
fegetmode.c Add femode_t functions. 2016-09-07 16:40:09 +00:00
fegetround.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
feholdexcpt.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
fenv_private.h Fix yn overflow handling in non-default rounding modes (bug 16561, bug 16562). 2014-06-27 14:52:13 +00:00
fesetenv.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
fesetexcept.c Add fesetexcept. 2016-08-16 16:16:10 +00:00
fesetmode.c Add femode_t functions. 2016-09-07 16:40:09 +00:00
fesetround.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
feupdateenv.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
fgetexcptflg.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
fraiseexcpt.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
fsetexcptflg.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ftestexcept.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
halfulp.c
i386-math-asm.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
Implies Use x86_64 fpu/bits/fenv.h for i386 and x86_64 2012-06-06 10:13:19 -07:00
libm-test-ulps i386: move ULPs to i686/multiarch and regenerate new ones for i386 2015-12-20 16:36:45 +01:00
libm-test-ulps-name Do not hardcode platform names in manual/libm-err-tab.pl (bug 14139). 2016-11-04 16:49:06 +00:00
math_private.h Fix math_private.h multiple include guards. 2015-11-20 23:46:23 +00:00
math-tests.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
mpatan2.c
mpatan.c
mpexp.c
mplog.c
mpsqrt.c
s_asinh.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_asinhf.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_asinhl.S Fix i386 asinhl (sNaN) (bug 20218). 2016-06-07 22:54:58 +00:00
s_atan.S Refactor i386 libm code forcing underflow exceptions. 2015-09-24 21:41:00 +00:00
s_atanf.S Refactor i386 libm code forcing underflow exceptions. 2015-09-24 21:41:00 +00:00
s_atanl.c
s_cbrt.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_cbrtf.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_cbrtl.S Fix i386 cbrtl (sNaN) (bug 20224). 2016-06-08 21:02:40 +00:00
s_ceil.S Avoid "inexact" exceptions in i386/x86_64 ceil functions (bug 15479). 2016-06-27 17:24:30 +00:00
s_ceilf.S Avoid "inexact" exceptions in i386/x86_64 ceil functions (bug 15479). 2016-06-27 17:24:30 +00:00
s_ceill.S Avoid "inexact" exceptions in i386/x86_64 ceil functions (bug 15479). 2016-06-27 17:24:30 +00:00
s_copysign.S
s_copysignf.S
s_copysignl.S
s_expm1.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_expm1f.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
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.c Fix i386 fdim double rounding (bug 20255). 2016-06-14 16:41:50 +00:00
s_finite.S
s_finitef.S
s_finitel.S
s_floor.S Avoid "inexact" exceptions in i386/x86_64 floor functions (bug 15479). 2016-06-27 17:25:47 +00:00
s_floorf.S Avoid "inexact" exceptions in i386/x86_64 floor functions (bug 15479). 2016-06-27 17:25:47 +00:00
s_floorl.S Avoid "inexact" exceptions in i386/x86_64 floor functions (bug 15479). 2016-06-27 17:25:47 +00:00
s_fmax.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_fmaxf.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_fmaxl.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_fmin.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_fminf.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_fminl.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_fpclassifyl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_frexp.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_frexpf.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_frexpl.S Fix frexp (NaN) (bug 20250). 2016-06-13 17:27:19 +00:00
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 dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_llrintf.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_llrintl.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_log1p.S Refactor i386 libm code forcing underflow exceptions. 2015-09-24 21:41:00 +00:00
s_log1pf.S Refactor i386 libm code forcing underflow exceptions. 2015-09-24 21:41:00 +00:00
s_log1pl.S Fix i386/x86_64 log1pl (sNaN) (bug 20229). 2016-06-08 23:11:42 +00:00
s_logb.S
s_logbf.S
s_logbl.c
s_lrint.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_lrintf.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_lrintl.S Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_nearbyint.S Simplify x86 nearbyint functions. 2016-06-22 15:40:30 +00:00
s_nearbyintf.S Simplify x86 nearbyint functions. 2016-06-22 15:40:30 +00:00
s_nearbyintl.S Simplify x86 nearbyint functions. 2016-06-22 15:40:30 +00:00
s_nextafterl.c Fix x86/x86_64 nextafterl incrementing negative subnormals (bug 20205). 2016-06-03 21:30:12 +00:00
s_nexttoward.c Make nextafter, nexttoward set errno (bug 6799). 2015-11-02 18:54:19 +00:00
s_nexttowardf.c Make nextafter, nexttoward set errno (bug 6799). 2015-11-02 18:54:19 +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 Avoid excess range in results from i386 scalb functions (bug 18981). 2015-09-18 20:34:59 +00:00
s_scalbnf.S Avoid excess range in results from i386 scalb functions (bug 18981). 2015-09-18 20:34:59 +00:00
s_scalbnl.S Make scalbn set errno (bug 6803). 2015-09-16 21:11:00 +00:00
s_significand.S
s_significandf.S
s_significandl.c
s_trunc.S Avoid "inexact" exceptions in i386/x86_64 trunc functions (bug 15479). 2016-06-27 17:26:52 +00:00
s_truncf.S Avoid "inexact" exceptions in i386/x86_64 trunc functions (bug 15479). 2016-06-27 17:26:52 +00:00
s_truncl.S Avoid "inexact" exceptions in i386/x86_64 trunc functions (bug 15479). 2016-06-27 17:26:52 +00:00
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