diff options
| author | Joseph Myers <joseph@codesourcery.com> | 2012-03-19 20:11:09 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2012-03-19 20:11:09 +0000 |
| commit | 7726d6a95d5a2c08c8d43186002f040b9b889c27 (patch) | |
| tree | a26c3837e5c05db789f8dfb66cd144791469baeb | |
| parent | 83d1aec8fc5f4250e6d5f44eeef30c923e140ca4 (diff) | |
| download | glibc-7726d6a95d5a2c08c8d43186002f040b9b889c27.zip glibc-7726d6a95d5a2c08c8d43186002f040b9b889c27.tar.gz glibc-7726d6a95d5a2c08c8d43186002f040b9b889c27.tar.bz2 | |
Fix atan2 spurious exceptions (bug 11451).
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | NEWS | 10 | ||||
| -rw-r--r-- | math/libm-test.inc | 2 | ||||
| -rw-r--r-- | sysdeps/ieee754/dbl-64/e_atan2.c | 9 |
4 files changed, 20 insertions, 6 deletions
@@ -1,5 +1,10 @@ 2012-03-19 Joseph Myers <joseph@codesourcery.com> + [BZ #11451] + * sysdeps/ieee754/dbl-64/e_atan2.c (__ieee754_atan2): Scale large + x and y. + * math/libm-test.inc (atan2_test): Add another test. + * Makerules (common-objdir-compile): Remove. * sysdeps/unix/Makefile (config-generated): Do not add $(unix-generated) to variable. @@ -12,11 +12,11 @@ Version 2.16 174, 350, 411, 2541, 2547, 2548, 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2576, 3335, 3976, 3992, 4026, 4108, 4596, 4822, 5077, 5461, 5805, 5993, 6471, 6884, 6907, 6911, 9739, 9902, 10110, 10135, 10140, 10210, - 10545, 10716, 11174, 11322, 11365, 11494, 12047, 13058, 13525, 13526, - 13527, 13528, 13529, 13530, 13531, 13532, 13533, 13547, 13551, 13552, - 13553, 13555, 13559, 13566, 13583, 13618, 13637, 13656, 13658, 13673, - 13695, 13704, 13706, 13726, 13738, 13786, 13792, 13806, 13840, 13841, - 13844, 13846, 13851, 13852, 13854 + 10545, 10716, 11174, 11322, 11365, 11451, 11494, 12047, 13058, 13525, + 13526, 13527, 13528, 13529, 13530, 13531, 13532, 13533, 13547, 13551, + 13552, 13553, 13555, 13559, 13566, 13583, 13618, 13637, 13656, 13658, + 13673, 13695, 13704, 13706, 13726, 13738, 13786, 13792, 13806, 13840, + 13841, 13844, 13846, 13851, 13852, 13854 * ISO C11 support: diff --git a/math/libm-test.inc b/math/libm-test.inc index 5638b76..817864a 100644 --- a/math/libm-test.inc +++ b/math/libm-test.inc @@ -949,6 +949,8 @@ atan2_test (void) TEST_ff_f (atan2, minus_infty, minus_infty, -M_PI_34l); TEST_ff_f (atan2, nan_value, nan_value, nan_value); + TEST_ff_f (atan2, max_value, max_value, M_PI_4l); + TEST_ff_f (atan2, 0.75L, 1, 0.643501108793284386802809228717322638L); TEST_ff_f (atan2, -0.75L, 1.0L, -0.643501108793284386802809228717322638L); TEST_ff_f (atan2, 0.75L, -1.0L, 2.49809154479650885165983415456218025L); diff --git a/sysdeps/ieee754/dbl-64/e_atan2.c b/sysdeps/ieee754/dbl-64/e_atan2.c index dcef55f..497afca 100644 --- a/sysdeps/ieee754/dbl-64/e_atan2.c +++ b/sysdeps/ieee754/dbl-64/e_atan2.c @@ -1,7 +1,7 @@ /* * IBM Accurate Mathematical Library * written by International Business Machines Corp. - * Copyright (C) 2001, 2011 Free Software Foundation + * Copyright (C) 2001-2012 Free Software Foundation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by @@ -153,6 +153,13 @@ __ieee754_atan2(double y,double x) { /* if either x or y is extremely close to zero, scale abs(x), abs(y). */ if (ax<twom500.d || ay<twom500.d) { ax*=two500.d; ay*=two500.d; } + /* Likewise for large x and y. */ + if (ax > two500.d || ay > two500.d) + { + ax *= twom500.d; + ay *= twom500.d; + } + /* x,y which are neither special nor extreme */ if (ay<ax) { u=ay/ax; |