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glibc/sysdeps/ieee754/flt-32
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Joseph Myers ce8fc784e6 Fix sign of remquo zero remainder in round-downward mode (bug 17987). 
Various remquo implementations produce a zero remainder with the wrong
sign (a zero remainder should always have the sign of the first
argument, as specified in IEEE 754) in round-downward mode, resulting
from the sign of 0 - 0.  This patch checks for zero results and fixes
their sign accordingly.

Tested for x86_64, x86, mips64 and powerpc.

	[BZ #17987]
	* sysdeps/ieee754/dbl-64/s_remquo.c (__remquo): Ensure sign of
	zero result does not depend on the sign resulting from
	subtraction.
	* sysdeps/ieee754/dbl-64/wordsize-64/s_remquo.c (__remquo):
	Likewise.
	* sysdeps/ieee754/flt-32/s_remquof.c (__remquof): Likewise.
	* sysdeps/ieee754/ldbl-128/s_remquol.c (__remquol): Likewise.
	* sysdeps/ieee754/ldbl-128ibm/s_remquol.c (__remquol): Likewise.
	* sysdeps/ieee754/ldbl-96/s_remquol.c (__remquol): Likewise.
	* math/libm-test.inc (remquo_test_data): Add more tests.
 		2015-02-17 00:41:50 +00:00
..
e_acosf.c
…
e_acoshf.c
…
e_asinf.c
…
e_atan2f.c
…
e_atanhf.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
e_coshf.c Fix cosh spurious underflows from expm1 (bug 16354), inaccurate results near 0 (bug 17061). 2014-06-23 20:20:10 +00:00
e_exp2f.c Fix exp2 spurious underflows (bug 16560). 2015-02-12 19:02:45 +00:00
e_expf.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
e_fmodf.c
…
e_gammaf_r.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
e_hypotf.c
…
e_ilogbf.c
…
e_j0f.c
…
e_j1f.c Set errno for y1 overflow (bug 17050). 2014-06-23 20:17:13 +00:00
e_jnf.c Fix yn overflow handling in non-default rounding modes (bug 16561, bug 16562). 2014-06-27 14:52:13 +00:00
e_lgammaf_r.c
…
e_log2f.c
…
e_log10f.c
…
e_logf.c Fix catan, catanh, __ieee754_logf in round-downward mode (bug 16799, bug 16800). 2014-04-02 17:41:02 +00:00
e_powf.c
…
e_rem_pio2f.c
…
e_remainderf.c
…
e_sinhf.c
…
e_sqrtf.c
…
k_cosf.c
…
k_rem_pio2f.c
…
k_sinf.c
…
k_tanf.c
…
math_private.h
…
mpn2flt.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_asinhf.c
…
s_atanf.c
…
s_cbrtf.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_ceilf.c
…
s_copysignf.c
…
s_cosf.c
…
s_erff.c Fix erf underflow handling near 0 (bug 16516). 2014-05-14 12:34:03 +00:00
s_expm1f.c
…
s_fabsf.c
…
s_finitef.c
…
s_floorf.c
…
s_fpclassifyf.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_frexpf.c
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s_isinf_nsf.c
…
s_isinff.c
…
s_isnanf.c
…
s_issignalingf.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_llrintf.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_llroundf.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_log1pf.c [BZ #16823] Fix log1pl returning wrong infinity sign 2014-04-29 15:43:36 +02:00
s_logbf.c
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s_lrintf.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_lroundf.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_modff.c
…
s_nearbyintf.c
…
s_nextafterf.c Fix nextafter overflow in non-default rounding modes (bug 16677). 2014-03-11 22:24:00 +00:00
s_remquof.c Fix sign of remquo zero remainder in round-downward mode (bug 17987). 2015-02-17 00:41:50 +00:00
s_rintf.c
…
s_roundf.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_scalblnf.c [BZ #6803] Set errno for scalbln, scalbn 2014-06-20 07:48:20 +05:30
s_scalbnf.c
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s_signbitf.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
s_sincosf.c Fix sincos errno setting (bug 15467). 2015-02-11 23:17:25 +00:00
s_sinf.c
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s_tanf.c
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s_tanhf.c
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s_truncf.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
t_exp2f.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
w_expf.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00