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59a63cca11
glibc/sysdeps/ieee754/ldbl-96
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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 Fix acosh (1) in round-downward mode (bug 16927). 2014-05-14 12:35:40 +00:00
e_asinl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
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_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_j0l.c Avoid uninitialized warnings in Bessel functions. 2015-02-26 21:49:19 +00:00
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 lgamma (negative) inaccuracy (bug 2542, bug 2543, bug 2558). 2015-09-10 22:27:58 +00:00
e_rem_pio2l.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
e_sinhl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
gamma_product.c Use math_narrow_eval more consistently. 2015-09-23 18:14:57 +00:00
gamma_productl.c 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_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_product.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
math_ldbl.h Fix a typo. 2000-12-21 23:30:28 +00:00
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 Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
s_cbrtl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_copysignl.c Use <> for math.h and math_private.h everywhere. 2012-03-09 16:09:10 -08:00
s_cosl.c Implement ldbl-96 sinl / cosl / sincosl (bug 13851). 2012-03-16 12:30:05 +00:00
s_erfl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
s_fma.c Replace finite with isfinite. 2015-06-03 16:35:44 +01:00
s_fmal.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
s_frexpl.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_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_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 ldbl-96 remquol (finite, Inf) (bug 18244). 2015-05-19 23:44:28 +00:00
s_roundl.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_scalblnl.c Fix ldbl-96 scalblnl underflowing results (bug 17803). 2015-01-12 23:02:14 +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 Implement ldbl-96 sinl / cosl / sincosl (bug 13851). 2012-03-16 12:30:05 +00:00
s_tanhl.c Refactor code forcing underflow exceptions. 2015-09-23 22:42:30 +00:00
s_tanl.c Fix tan, tanl for large inputs. 2012-03-16 20:05:37 +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 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
x2y2m1.c Fix clog, clog10 inaccuracy (bug 19016). 2015-09-28 22:11:22 +00:00
x2y2m1l.c Fix clog, clog10 inaccuracy (bug 19016). 2015-09-28 22:11:22 +00:00