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440169d681
glibc/sysdeps/ieee754/ldbl-128ibm
History
Joseph Myers 440169d681 Fix ldbl-128ibm acoshl inaccuracy (bug 18019). 
The ldbl-128ibm implementation of acoshl uses a cut-off of 0x1p28 to
determine when to use log(x) + log(2) as a formula.  That cut-off is
too small for this format, resulting in large errors.  This patch
changes it to a more appropriate cut-off of 0x1p56, adding tests
around the cut-offs for various floating-point formats.

Tested for powerpc.  Also tested for x86_64 and x86 and updated ulps.

	[BZ #18019]
	* sysdeps/ieee754/ldbl-128ibm/e_acoshl.c (__ieee754_acoshl): Use
	2**56 not 2**28 as threshold for log (2x) formula.
	* math/auto-libm-test-in: Add more tests of acosh.
	* math/auto-libm-test-out: Regenerated.
	* sysdeps/i386/fpu/libm-test-ulps: Update.
	* sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
2015-02-25 00:01:15 +00:00
..
e_acoshl.c Fix ldbl-128ibm acoshl inaccuracy (bug 18019). 2015-02-25 00:01:15 +00:00
e_acosl.c Avoid ordered comparisons of NaNs in ldbl-128ibm acosl and asinl. 2013-10-10 19:11:30 +00:00
e_asinl.c Avoid ordered comparisons of NaNs in ldbl-128ibm acosl and asinl. 2013-10-10 19:11:30 +00:00
e_atan2l.c PowerPC floating point little-endian [3 of 15] 2013-10-04 10:32:36 +09:30
e_atanhl.c PowerPC floating point little-endian [2 of 15] 2013-10-04 10:32:19 +09:30
e_coshl.c Fix cosh spurious underflows from expm1 (bug 16354), inaccurate results near 0 (bug 17061). 2014-06-23 20:20:10 +00:00
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 Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
e_gammal_r.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
e_hypotl.c PowerPC floating point little-endian [4 of 15] 2013-10-04 10:32:48 +09:30
e_ilogbl.c PowerPC floating point little-endian [3 of 15] 2013-10-04 10:32:36 +09:30
e_j0l.c 2006-01-27 Dwayne Grant McConnell <decimal@us.ibm.com> 2006-01-28 00:15:15 +00:00
e_j1l.c 2006-01-27 Dwayne Grant McConnell <decimal@us.ibm.com> 2006-01-28 00:15:15 +00:00
e_jnl.c Fix yn overflow handling in non-default rounding modes (bug 16561, bug 16562). 2014-06-27 14:52:13 +00:00
e_lgammal_r.c 2006-01-27 Dwayne Grant McConnell <decimal@us.ibm.com> 2006-01-28 00:15:15 +00:00
e_log2l.c Fix log2 (1) in round-downward mode (bug 17042). 2014-06-10 12:07:15 +00:00
e_log10l.c Fix log10 (1) in round-downward mode (bug 16977). 2014-05-23 12:07:50 +00:00
e_logl.c Fix ldbl-128ibm logl inaccuracy (bug 16386). 2014-01-02 16:35:46 +00:00
e_powl.c PowerPC floating point little-endian [3 of 15] 2013-10-04 10:32:36 +09:30
e_rem_pio2l.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
e_remainderl.c PowerPC floating point little-endian [4 of 15] 2013-10-04 10:32:48 +09:30
e_sinhl.c PowerPC floating point little-endian [2 of 15] 2013-10-04 10:32:19 +09:30
e_sqrtl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
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 PowerPC floating point little-endian [3 of 15] 2013-10-04 10:32:36 +09:30
ldbl2mpn.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
Makefile 2006-01-27 Dwayne Grant McConnell <decimal@us.ibm.com> 2006-01-28 00:15:15 +00:00
math_ldbl.h Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
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 Fix ldbl-128ibm asinhl inaccuracy (bug 16385). 2014-01-02 16:34:24 +00:00
s_atanl.c Fix atan / atan2 missing underflows (bug 15319). 2015-02-18 21:10:49 +00:00
s_cbrtl.c 2006-01-27 Dwayne Grant McConnell <decimal@us.ibm.com> 2006-01-28 00:15:15 +00:00
s_ceill.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_copysignl.c Remove IS_IN_libm 2014-11-24 11:41:47 +05:30
s_cosl.c PowerPC floating point little-endian [2 of 15] 2013-10-04 10:32:19 +09:30
s_cprojl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_ctanhl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_ctanl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_erfl.c Fix erf underflow handling near 0 (bug 16516). 2014-05-14 12:34:03 +00:00
s_expm1l.c Fix ldbl-128ibm expm1l on large arguments (bug 16408). 2014-01-08 13:32:39 +00:00
s_fabsl.c PowerPC floating point little-endian [2 of 15] 2013-10-04 10:32:19 +09:30
s_finitel.c Remove IS_IN_libm 2014-11-24 11:41:47 +05:30
s_floorl.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 FIx ldbl-128ibm frexpl for 32-bit systems (bug 16619, bug 16740). 2014-11-26 13:54:55 +00:00
s_isinf_nsl.c PowerPC floating point little-endian [3 of 15] 2013-10-04 10:32:36 +09:30
s_isinfl.c Remove IS_IN_libm 2014-11-24 11:41:47 +05:30
s_isnanl.c Remove IS_IN_libm 2014-11-24 11:41:47 +05:30
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 Fix log1pl (LDBL_MAX) in FE_UPWARD mode (bug 16564). 2014-05-14 12:38:56 +00:00
s_logbl.c Use glibc_likely instead __builtin_expect. 2014-02-10 15:07:12 +01:00
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 Remove IS_IN_libm 2014-11-24 11:41:47 +05:30
s_nearbyintl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_nextafterl.c Correct IBM long double nextafterl. 2014-04-02 13:46:19 +10:30
s_nexttoward.c PowerPC floating point little-endian [3 of 15] 2013-10-04 10:32:36 +09:30
s_nexttowardf.c PowerPC floating point little-endian [3 of 15] 2013-10-04 10:32:36 +09:30
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 Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_roundl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_scalblnl.c [BZ #6803] Set errno for scalbln, scalbn 2014-06-20 07:48:20 +05:30
s_scalbnl.c Remove IS_IN_libm 2014-11-24 11:41:47 +05:30
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 PowerPC floating point little-endian [2 of 15] 2013-10-04 10:32:19 +09:30
s_tanhl.c PowerPC floating point little-endian [3 of 15] 2013-10-04 10:32:36 +09:30
s_tanl.c PowerPC floating point little-endian [2 of 15] 2013-10-04 10:32:19 +09:30
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_sincosl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
w_expl.c BZ#13889: expl (709.75) wrongly overflows for ldbl-128ibm 2013-03-22 12:39:10 -03:00
w_scalblnl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
x2y2m1l.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00