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Fix exp10 errno setting on underflow (bug 6787).

This commit is contained in:
Joseph Myers 2013-11-29 16:32:49 +00:00
parent ea3bc4e821
commit 2a77a467b2
6 changed files with 26 additions and 16 deletions
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7
ChangeLog
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@ -1,5 +1,12 @@
2013-11-29 Joseph Myers <joseph@codesourcery.com>
[BZ #6787]
* math/w_exp10.c (__exp10): Handle a zero result as underflow.
* math/w_exp10f.c (__exp10f): Likewise.
* math/w_exp10l.c (__exp10l): Likewise.
* math/libm-test.inc (exp10_test_data): Add more tests and expect
errno settings in existing tests.
[BZ #14032]
* sysdeps/i386/fpu/e_sqrt.S (__ieee754_sqrt): Do fsqrt with
precision control set to double precision.

23
NEWS
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@ -9,17 +9,18 @@ Version 2.19
* The following bugs are resolved with this release:
156, 387, 431, 832, 2801, 7003, 9954, 10253, 10278, 11087, 11157, 11214,
13028, 13982, 13985, 14029, 14032, 14143, 14155, 14547, 14699, 14752,
14876, 14910, 15004, 15048, 15218, 15277, 15308, 15362, 15374, 15400,
15427, 15483, 15522, 15531, 15532, 15601, 15608, 15609, 15610, 15632,
15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15844, 15847,
15849, 15855, 15856, 15857, 15859, 15867, 15886, 15887, 15890, 15892,
15893, 15895, 15897, 15905, 15909, 15917, 15919, 15921, 15923, 15939,
15948, 15963, 15966, 15985, 15988, 15997, 16032, 16034, 16036, 16037,
16041, 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143,
16144, 16146, 16150, 16151, 16153, 16167, 16172, 16214, 16245, 16271.
156, 387, 431, 832, 2801, 6787, 7003, 9954, 10253, 10278, 11087, 11157,
11214, 13028, 13982, 13985, 14029, 14032, 14143, 14155, 14547, 14699,
14752, 14876, 14910, 15004, 15048, 15218, 15277, 15308, 15362, 15374,
15400, 15427, 15483, 15522, 15531, 15532, 15601, 15608, 15609, 15610,
15632, 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736,
15748, 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15844,
15847, 15849, 15855, 15856, 15857, 15859, 15867, 15886, 15887, 15890,
15892, 15893, 15895, 15897, 15905, 15909, 15917, 15919, 15921, 15923,
15939, 15948, 15963, 15966, 15985, 15988, 15997, 16032, 16034, 16036,
16037, 16041, 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112,
16143, 16144, 16146, 16150, 16151, 16153, 16167, 16172, 16214, 16245,
16271.
* The public headers no longer use __unused nor __block. This change is to
support compiling programs that are derived from BSD sources and use

6
math/libm-test.inc
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@ -8134,10 +8134,12 @@ static const struct test_f_f_data exp10_test_data[] =
TEST_f_f (exp10, 4932, 1.0e4932L),
TEST_f_f (exp10, -4932, 1.0e-4932L, UNDERFLOW_EXCEPTION),
#endif
TEST_f_f (exp10, 1e5, plus_infty, OVERFLOW_EXCEPTION|ERRNO_ERANGE),
TEST_f_f (exp10, -1e5, 0, UNDERFLOW_EXCEPTION|ERRNO_ERANGE),
TEST_f_f (exp10, 1e6, plus_infty, OVERFLOW_EXCEPTION|ERRNO_ERANGE),
TEST_f_f (exp10, -1e6, 0, UNDERFLOW_EXCEPTION),
TEST_f_f (exp10, -1e6, 0, UNDERFLOW_EXCEPTION|ERRNO_ERANGE),
TEST_f_f (exp10, max_value, plus_infty, OVERFLOW_EXCEPTION|ERRNO_ERANGE),
TEST_f_f (exp10, -max_value, 0, UNDERFLOW_EXCEPTION),
TEST_f_f (exp10, -max_value, 0, UNDERFLOW_EXCEPTION|ERRNO_ERANGE),
TEST_f_f (exp10, 0.75L, 5.62341325190349080394951039776481231L),
};

2
math/w_exp10.c
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@ -28,7 +28,7 @@ double
__exp10 (double x)
{
double z = __ieee754_exp10 (x);
if (__builtin_expect (!__finite (z), 0)
if (__builtin_expect (!__finite (z) || z == 0, 0)
&& __finite (x) && _LIB_VERSION != _IEEE_)
/* exp10 overflow (46) if x > 0, underflow (47) if x < 0. */
return __kernel_standard (x, x, 46 + !!__signbit (x));

2
math/w_exp10f.c
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@ -28,7 +28,7 @@ float
__exp10f (float x)
{
float z = __ieee754_exp10f (x);
if (__builtin_expect (!__finitef (z), 0)
if (__builtin_expect (!__finitef (z) || z == 0, 0)
&& __finitef (x) && _LIB_VERSION != _IEEE_)
/* exp10f overflow (146) if x > 0, underflow (147) if x < 0. */
return __kernel_standard_f (x, x, 146 + !!__signbitf (x));

2
math/w_exp10l.c
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@ -28,7 +28,7 @@ long double
__exp10l (long double x)
{
long double z = __ieee754_exp10l (x);
if (__builtin_expect (!__finitel (z), 0)
if (__builtin_expect (!__finitel (z) || z == 0, 0)
&& __finitel (x) && _LIB_VERSION != _IEEE_)
/* exp10l overflow (246) if x > 0, underflow (247) if x < 0. */
return __kernel_standard_l (x, x, 246 + !!__signbitl (x));