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c091488e51
glibc/sysdeps/ieee754/ldbl-128ibm
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Joseph Myers c091488e51 Fix ldbl-128ibm powl overflow handling (bug 19674). 
The ldbl-128ibm implementation of powl has some problems in the case
of overflow or underflow, which are mainly visible in non-default
rounding modes.

* When overflow or underflow is detected early, the correct sign of an
  overflowing or underflowing result is not allowed for.  This is
  mostly hidden in the default rounding mode by the errno-setting
  wrappers recomputing the result (except in non-default
  error-handling modes such as -lieee), but visible in other rounding
  modes where a result that is not zero or infinity causes the
  wrappers not to do the recomputation.

* The final scaling is done before the sign is incorporated in the
  result, but should be done afterwards for correct overflowing and
  underflowing results in directed rounding modes.

This patch fixes those problems.  Tested for powerpc.

	[BZ #19674]
	* sysdeps/ieee754/ldbl-128ibm/e_powl.c (__ieee754_powl): Include
	sign in overflowing and underflowing results when overflow or
	underflow is detected early.  Include sign in result before rather
	than after scaling.
2016-02-19 01:07:40 +00:00
..
e_acoshl.c Fix ldbl-128ibm acoshl inaccuracy (bug 18019). 2015-02-25 00:01:15 +00:00
e_acosl.c This patch renames all uses of __isinf*, __isnan*, __finite* and __signbit* to use standard C99 macros. This has no effect on generated code. 2015-06-03 15:41:36 +01:00
e_asinl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
e_atan2l.c PowerPC floating point little-endian [3 of 15] 2013-10-04 10:32:36 +09:30
e_atanhl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
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. 2016-01-04 16:05:18 +00:00
e_expl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
e_fmodl.c Fix ldbl-128ibm fmodl handling of equal arguments with low part zero (bug 19602). 2016-02-18 22:54:07 +00:00
e_gammal_r.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
e_hypotl.c Fix hypot missing underflows (bug 18803). 2015-09-24 23:43:57 +00:00
e_ilogbl.c Fix ldbl-128ibm ilogbl near powers of 2 (bug 18029). 2015-02-26 12:57:21 +00:00
e_j0l.c
e_j1l.c
e_jnl.c Fix j1, jn missing errno setting on underflow (bug 18611). 2015-10-23 21:37:33 +00:00
e_lgammal_r.c
e_log2l.c Convert 231 sysdeps function definitions to prototype style. 2015-10-19 12:04:33 +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 near 1 (bug 19351). 2015-12-09 23:51:11 +00:00
e_powl.c Fix ldbl-128ibm powl overflow handling (bug 19674). 2016-02-19 01:07:40 +00:00
e_rem_pio2l.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
e_remainderl.c Fix ldbl-128ibm remainderl, remquol equality tests (bug 19603). 2016-02-19 00:55:46 +00:00
e_sinhl.c Fix ldbl-128ibm sinhl spurious overflows (bug 19350). 2015-12-09 22:37:08 +00:00
e_sqrtl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
gamma_productl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ieee754.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
k_cosl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
k_sincosl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
k_sinl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
k_tanl.c Remove GCC version conditionals on -Wmaybe-uninitialized pragmas. 2015-10-27 23:42:20 +00:00
ldbl2mpn.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
lgamma_negl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
lgamma_productl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
Makefile Fix ldbl-128ibm fmodl handling of equal arguments with low part zero (bug 19602). 2016-02-18 22:54:07 +00:00
math_ldbl.h Fix ldbl-128ibm floorl for non-default rounding modes (bug 17899). 2016-02-18 21:31:10 +00:00
mpn2ldbl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
printf_fphex.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_asinhl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
s_atanl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
s_cbrtl.c
s_ceill.c Fix ldbl-128ibm ceill for non-default rounding modes (bug 19592). 2016-02-18 21:40:39 +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_erfl.c Remove unused variables 2016-01-27 09:30:16 +01:00
s_expm1l.c Clean up ldbl-128 / ldbl-128ibm expm1l dead code (bug 16415). 2015-09-16 16:42:46 +00:00
s_fabsl.c PowerPC floating point little-endian [2 of 15] 2013-10-04 10:32:19 +09:30
s_finitel.c Reduce number of constants in __finite* (bug 15384). 2015-09-17 16:47:14 +00:00
s_floorl.c Fix ldbl-128ibm floorl for non-default rounding modes (bug 17899). 2016-02-18 21:31:10 +00:00
s_fmal.c 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_frexpl.c FIx ldbl-128ibm frexpl for 32-bit systems (bug 16619, bug 16740). 2014-11-26 13:54:55 +00:00
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. 2016-01-04 16:05:18 +00:00
s_llrintl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_llroundl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_log1pl.c Remove unused variables 2016-01-27 09:30:16 +01:00
s_logbl.c Work around powerpc32 integer 0 converting to -0 (bug 887, bug 19049, bug 19050). 2015-10-05 17:46:50 +00:00
s_lrintl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_lroundl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +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. 2016-01-04 16:05:18 +00:00
s_nextafterl.c Make nextafter, nexttoward set errno (bug 6799). 2015-11-02 18:54:19 +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_remquol.c Fix ldbl-128ibm remainderl, remquol equality tests (bug 19603). 2016-02-19 00:55:46 +00:00
s_rintl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_roundl.c Fix ldbl-128ibm roundl for non-default rounding modes (bug 19594). 2016-02-18 22:24:32 +00:00
s_scalblnl.c [BZ #6803] Set errno for scalbln, scalbn 2014-06-20 07:48:20 +05:30
s_scalbnl.c Make scalbn set errno (bug 6803). 2015-09-16 21:11:00 +00:00
s_signbitl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_sincosl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
s_sinl.c PowerPC floating point little-endian [2 of 15] 2013-10-04 10:32:19 +09:30
s_tanhl.c Fix ldbl-128ibm tanhl inaccuracy for small arguments (bug 19349). 2015-12-09 21:20:18 +00:00
s_tanl.c PowerPC floating point little-endian [2 of 15] 2013-10-04 10:32:19 +09:30
s_truncl.c Fix ldbl-128ibm truncl for non-default rounding modes (bug 19593). 2016-02-18 21:52:07 +00:00
strtod_nan_ldouble.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strtold_l.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
t_sincosl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-fmodl-ldbl-128ibm.c Fix ldbl-128ibm fmodl handling of equal arguments with low part zero (bug 19602). 2016-02-18 22:54:07 +00:00
tst-strtold-ldbl-128ibm.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
w_expl.c Fix ldbl-128ibm expl overflow in non-default rounding modes (bug 19078). 2015-10-06 17:37:49 +00:00
w_log1pl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
w_scalblnl.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
x2y2m1l.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00