Joseph Myers 2ca725c594 Fix ldbl-96, ldbl-128ibm atanhl inaccuracy (bug 18046, bug 18047). ... The threshold in ldbl-96 atanhl for when to return the argument, 0x1p-28, is a bit too big, and that in ldbl-128ibm atanhl is much too big (the relevant condition being x^3/3 being < 0.5ulp of x), resulting in errors a bit above the limits of those considered acceptable in glibc in the ldbl-96 case, and in large errors in the ldbl-128ibm case. This patch changes those implementations to use more appropriate thresholds and adds tests around the thresholds for various formats. Tested for x86_64, x86 and powerpc. x86_64 and x86 ulps updated accordingly. [BZ #18046] [BZ #18047] * sysdeps/ieee754/ldbl-128ibm/e_atanhl.c (__ieee754_atanhl): Use 0x1p-56L as threshold for just returning the argument. * sysdeps/ieee754/ldbl-96/e_atanhl.c (__ieee754_atanhl): Use 0x1p-32L as threshold for just returning the argument. * math/auto-libm-test-in: Add more tests of atanh. * math/auto-libm-test-out: Regenerated. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulp: Likewise.		2015-02-27 17:48:37 +00:00
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e_acoshl.c
e_asinl.c	Fix asin missing underflows (bug 16351).	2015-02-26 17:18:54 +00:00
e_atanhl.c	Fix ldbl-96, ldbl-128ibm atanhl inaccuracy (bug 18046, bug 18047).	2015-02-27 17:48:37 +00:00
e_coshl.c
e_gammal_r.c
e_hypotl.c
e_j0l.c	Avoid uninitialized warnings in Bessel functions.	2015-02-26 21:49:19 +00:00
e_j1l.c	Avoid uninitialized warnings in Bessel functions.	2015-02-26 21:49:19 +00:00
e_jnl.c
e_lgammal_r.c
e_rem_pio2l.c
e_sinhl.c
gamma_product.c
gamma_productl.c
k_cosl.c
k_sinl.c
k_tanl.c
ldbl2mpn.c
math_ldbl.h
mpn2ldbl.c
printf_fphex.c
s_asinhl.c
s_cbrtl.c
s_copysignl.c
s_cosl.c
s_erfl.c
s_fma.c
s_fmal.c
s_frexpl.c
s_isinf_nsl.c
s_issignalingl.c
s_llrintl.c
s_llroundl.c
s_lrintl.c
s_lroundl.c
s_modfl.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_roundl.c
s_scalblnl.c	Fix ldbl-96 scalblnl underflowing results (bug 17803).	2015-01-12 23:02:14 +00:00
s_signbitl.c
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
strtold_l.c
t_sincosl.c
w_expl.c
x2y2m1.c
x2y2m1l.c