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glibc/sysdeps/ieee754/ldbl-128
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Joseph Myers 59a63cca11 Fix nexttoward overflow in non-default rounding modes (bug 19059). 
ISO C requires overflowing results from nexttoward to be the
appropriate infinity independent of the rounding mode, but some
implementations use a rounding-mode-dependent result (this is the same
issue as was fixed for nextafter in bug 16677).  This patch fixes the
problem by making the nexttoward implementations discard the result
from the floating-point computation that forced an overflow exception
and then return the infinity previously computed with integer
arithmetic.

Tested for x86_64, x86, mips64 and powerpc.

	[BZ #19059]
	* math/s_nexttowardf.c (__nexttowardf): Do not return value from
	overflowing computation.
	* sysdeps/i386/fpu/s_nexttoward.c (__nexttoward): Likewise.
	* sysdeps/i386/fpu/s_nexttowardf.c (__nexttowardf): Likewise.
	* sysdeps/ieee754/ldbl-128/s_nexttoward.c (__nexttoward):
	Likewise.
	* sysdeps/ieee754/ldbl-128/s_nexttowardf.c (__nexttowardf):
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_nexttoward.c (__nexttoward):
	Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_nexttowardf.c (__nexttowardf):
	Likewise.
	* sysdeps/ieee754/ldbl-96/s_nexttoward.c (__nexttoward): Likewise.
	* sysdeps/ieee754/ldbl-96/s_nexttowardf.c (__nexttowardf):
	Likewise.
	* sysdeps/ieee754/ldbl-opt/s_nexttowardfd.c (__nldbl_nexttowardf):
	Likewise.
	* math/libm-test.inc (nexttoward_test_data): Add more tests.
2015-10-02 17:11:13 +00:00
..
e_acoshl.c Use <> for math.h and math_private.h everywhere. 2012-03-09 16:09:10 -08:00
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 Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
e_atan2l.c Use <> for math.h and math_private.h everywhere. 2012-03-09 16:09:10 -08:00
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 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_expl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
e_fmodl.c Use <> for math.h and math_private.h everywhere. 2012-03-09 16:09:10 -08:00
e_gammal_r.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
e_hypotl.c Fix hypot missing underflows (bug 18803). 2015-09-24 23:43:57 +00:00
e_ilogbl.c Finish ilogb changes 2012-04-18 14:31:43 +02:00
e_j0l.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_j1l.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
e_jnl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
e_lgammal_r.c Fix ldbl-128 / ldbl-128ibm lgamma overflow handling (bug 16347, bug 19046). 2015-10-01 17:15:54 +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 log (1) in round-downward mode (bug 16731). 2014-03-21 18:13:58 +00:00
e_powl.c Fix pow missing underflows (bug 18825). 2015-09-25 22:29:10 +00:00
e_rem_pio2l.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
e_remainderl.c Use <> for math.h and math_private.h everywhere. 2012-03-09 16:09:10 -08:00
e_sinhl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +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 Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
k_sinl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
k_tanl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
ldbl2mpn.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
lgamma_negl.c Fix lgamma (negative) inaccuracy (bug 2542, bug 2543, bug 2558). 2015-09-10 22:27:58 +00:00
lgamma_productl.c Fix lgamma (negative) inaccuracy (bug 2542, bug 2543, bug 2558). 2015-09-10 22:27:58 +00:00
Makefile * sysdeps/ieee754/ldbl-128/Makefile: New file. 2007-03-14 17:36:18 +00:00
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 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 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
s_ceill.c Use <> for math.h and math_private.h everywhere. 2012-03-09 16:09:10 -08:00
s_copysignl.c Use <> for math.h and math_private.h everywhere. 2012-03-09 16:09:10 -08:00
s_cosl.c Use <> for math.h and math_private.h everywhere. 2012-03-09 16:09:10 -08:00
s_erfl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
s_expm1l.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
s_fabsl.c Use <> for math.h and math_private.h everywhere. 2012-03-09 16:09:10 -08:00
s_finitel.c Reduce number of constants in __finite* (bug 15384). 2015-09-17 16:47:14 +00:00
s_floorl.c Use <> for math.h and math_private.h everywhere. 2012-03-09 16:09:10 -08:00
s_fma.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_fmal.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
s_fpclassifyl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_frexpl.c Use <> for math.h and math_private.h everywhere. 2012-03-09 16:09:10 -08:00
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_issignalingl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_llrintl.c Use math_narrow_eval more consistently. 2015-09-23 18:14:57 +00:00
s_llroundl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_log1pl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
s_logbl.c Optimize handling of denormals in logb/logbf/logbl 2012-05-26 13:53:22 +02:00
s_lrintl.c Use math_narrow_eval more consistently. 2015-09-23 18:14:57 +00:00
s_lroundl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_modfl.c Use <> for math.h and math_private.h everywhere. 2012-03-09 16:09:10 -08:00
s_nearbyintl.c Fix nearbyint scheduling of arithmetic past fesetenv (bug 15490). 2013-05-19 18:40:25 +00:00
s_nextafterl.c Fix nextafter overflow in non-default rounding modes (bug 16677). 2014-03-11 22:24:00 +00:00
s_nexttoward.c Fix nexttoward overflow in non-default rounding modes (bug 19059). 2015-10-02 17:11:13 +00:00
s_nexttowardf.c Fix nexttoward overflow in non-default rounding modes (bug 19059). 2015-10-02 17:11:13 +00:00
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 Fix set-but-not-used warnings in ldbl-128 nearbyintl, rintl. 2012-11-20 14:26:07 +00:00
s_roundl.c Fix ldbl-128 roundl for exponents in [31, 47] (bug 18346). 2015-04-28 17:27:02 +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 Use the GCC builtin functions for the non-inlined signbit implementations. 2015-09-18 16:39:08 +01:00
s_sincosl.c Since we now inline isinf, isnan and isfinite in math.h, replace uses of __isinf_ns(l/f) 2015-09-18 20:51:52 +01:00
s_sinl.c Use <> for math.h and math_private.h everywhere. 2012-03-09 16:09:10 -08:00
s_tanhl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
s_tanl.c Remove trailing whitespace. 2013-06-05 20:44:03 +00:00
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 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
x2y2m1l.c Fix clog, clog10 inaccuracy (bug 19016). 2015-09-28 22:11:22 +00:00