Joseph Myers a820f9b3c0 Fix remquo spurious overflows (bug 17978). ...

Various remquo implementations, when computing the last three bits of
the quotient, have spurious overflows when 4 times the second argument
to remquo overflows.  These overflows can in turn cause bad results in
rounding modes where that overflow results in a finite value.  This
patch adds tests to avoid the problem multiplications in cases where
they would overflow, similar to those that control an earlier
multiplication by 8.

Tested for x86_64, x86, mips64 and powerpc.

	[BZ #17978]
	* sysdeps/ieee754/dbl-64/s_remquo.c (__remquo): Do not form
	products 4 * y and 2 * y where those would overflow.
	* 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.

2015-02-16 22:38:28 +00:00

..

e_acoshl.c

…

e_acosl.c

…

e_asinl.c

…

e_atan2l.c

…

e_atanhl.c

…

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.

2015-01-02 16:29:47 +00:00

e_expl.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

e_fmodl.c

…

e_gammal_r.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

e_hypotl.c

Fix hypot handling of subnormals (bug 16316, bug 16330).

2013-12-17 13:42:13 +00:00

e_ilogbl.c

…

e_j0l.c

Fix Bessel function spurious overflows for ldbl-128 / ldbl-128ibm (bug 15285).

2013-03-21 13:57:21 +00:00

e_j1l.c

Set errno for y1 overflow (bug 17050).

2014-06-23 20:17:13 +00:00

e_jnl.c

Fix yn overflow handling in non-default rounding modes (bug 16561, bug 16562).

2014-06-27 14:52:13 +00:00

e_lgammal_r.c

powerpc: Fix lgammal_r overflow warnings

2014-12-11 07:17:11 -05:00

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 ldbl-128 powl sign of result in overflow / underflow cases (bug 17097).

2014-06-29 11:49:08 +00:00

e_rem_pio2l.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

e_remainderl.c

…

e_sinhl.c

…

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

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

k_sinl.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

k_tanl.c

Remove trailing whitespace.

2013-06-05 20:44:03 +00:00

ldbl2mpn.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

Makefile

…

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

…

s_atanl.c

Remove trailing whitespace.

2013-06-05 20:44:03 +00:00

s_cbrtl.c

…

s_ceill.c

…

s_copysignl.c

…

s_cosl.c

…

s_erfl.c

Fix ldbl-128 erfl spurious underflows (bug 16287).

2014-06-24 20:56:56 +00:00

s_expm1l.c

Fix ldbl-128 expm1l spurious underflow (bug 16539).

2014-06-30 17:38:16 +00:00

s_fabsl.c

…

s_finitel.c

…

s_floorl.c

…

s_fma.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_fmal.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_fpclassifyl.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_frexpl.c

…

s_isinf_nsl.c

…

s_isinfl.c

…

s_isnanl.c

…

s_issignalingl.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_llrintl.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_llroundl.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_log1pl.c

Fix log1pl (LDBL_MAX) in FE_UPWARD mode (bug 16564).

2014-05-14 12:38:56 +00:00

s_logbl.c

…

s_lrintl.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_lroundl.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_modfl.c

…

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 leading whitespaces.

2013-06-06 20:36:07 +02:00

s_nexttowardf.c

Remove trailing whitespace.

2013-06-05 20:44:03 +00:00

s_remquol.c

Fix remquo spurious overflows (bug 17978).

2015-02-16 22:38:28 +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

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

s_scalblnl.c

[BZ #6803] Set errno for scalbln, scalbn

2014-06-20 07:48:20 +05:30

s_scalbnl.c

Remove trailing whitespace.

2013-06-05 20:44:03 +00:00

s_signbitl.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00

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

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

[BZ #16427] Fix ldbl-128 exp overflows.

2014-01-15 09:50:31 +01:00

x2y2m1l.c

Update copyright dates with scripts/update-copyrights.

2015-01-02 16:29:47 +00:00