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a3d9ab5070
glibc/sysdeps/ieee754/ldbl-128
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Joseph Myers 1d9ab20c14 Fix ldbl-128/ldbl-128ibm acosl inaccuracy (bug 18038, bug 18039). 
The ldbl-128 and ldbl-128ibm implementations of acosl have similar
bugs, using a threshold of 0x1p-57L to determine when they just return
pi/2.  Since the result pi/2 - asinl (x) is roughly pi/2 - x for small
x, the relevant cut-off is actually x being < 0.5ulp of 1.  This patch
fixes the implementations to use that cut-off and adds tests of small
acos arguments.

Tested for powerpc and mips64.  Also tested for x86_64 and x86; no
ulps updates needed.

	[BZ #18038]
	[BZ #18039]
	* sysdeps/ieee754/ldbl-128/e_acosl.c (__ieee754_acosl): Only
	return pi/2 for arguments below 0x1p-113L.
	* sysdeps/ieee754/ldbl-128ibm/e_acosl.c (__ieee754_acosl): Only
	return pi/2 for arguments below 0x1p-106L.
	* math/auto-libm-test-in: Add more tests of acos.
	* math/auto-libm-test-out: Regenerated.
2015-02-26 21:06:34 +00:00
..
e_acoshl.c
e_acosl.c Fix ldbl-128/ldbl-128ibm acosl inaccuracy (bug 18038, bug 18039). 2015-02-26 21:06:34 +00:00
e_asinl.c Fix asin missing underflows (bug 16351). 2015-02-26 17:18:54 +00:00
e_atan2l.c
e_atanhl.c
e_coshl.c
e_exp10l.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
e_expl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
e_fmodl.c
e_gammal_r.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
e_hypotl.c
e_ilogbl.c
e_j0l.c
e_j1l.c
e_jnl.c
e_lgammal_r.c powerpc: Fix lgammal_r overflow warnings 2014-12-11 07:17:11 -05:00
e_log2l.c
e_log10l.c
e_logl.c
e_powl.c Fix ldbl-128 powl sign of result in overflow / underflow cases (bug 17097). 2014-06-29 11:49:08 +00:00
e_rem_pio2l.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
e_remainderl.c
e_sinhl.c
gamma_productl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
ieee754.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
k_cosl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
k_sincosl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
k_sinl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
k_tanl.c
ldbl2mpn.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
Makefile
math_ldbl.h
mpn2ldbl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
printf_fphex.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_asinhl.c
s_atanl.c Fix atan / atan2 missing underflows (bug 15319). 2015-02-18 21:10:49 +00:00
s_cbrtl.c
s_ceill.c
s_copysignl.c
s_cosl.c
s_erfl.c
s_expm1l.c Fix ldbl-128 expm1l spurious underflow (bug 16539). 2014-06-30 17:38:16 +00:00
s_fabsl.c
s_finitel.c
s_floorl.c
s_fma.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_fmal.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_fpclassifyl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_frexpl.c
s_isinf_nsl.c
s_isinfl.c
s_isnanl.c
s_issignalingl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_llrintl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_llroundl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_log1pl.c
s_logbl.c
s_lrintl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_lroundl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_modfl.c
s_nearbyintl.c
s_nextafterl.c
s_nexttoward.c
s_nexttowardf.c
s_remquol.c Fix sign of remquo zero remainder in round-downward mode (bug 17987). 2015-02-17 00:41:50 +00:00
s_rintl.c
s_roundl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_scalblnl.c
s_scalbnl.c
s_signbitl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_sincosl.c Fix sincos errno setting (bug 15467). 2015-02-11 23:17:25 +00:00
s_sinl.c
s_tanhl.c
s_tanl.c
s_truncl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
strtold_l.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
t_expl.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
t_sincosl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
w_expl.c
x2y2m1l.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00