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| author | Joseph Myers <joseph@codesourcery.com> | 2014-05-14 12:37:24 +0000 |
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| committer | Joseph Myers <joseph@codesourcery.com> | 2014-05-14 12:37:24 +0000 |
| commit | 01dbacd22a8d5e0053f8d0cf13a80286b6cfe79b (patch) | |
| tree | 91adc1f6c05cc5dbfb6b3b55b7500fa9dae9fd0e /posix | |
| parent | 913d03c864ea2547e97f8d2d30fc71a008d4d103 (diff) | |
| download | glibc-01dbacd22a8d5e0053f8d0cf13a80286b6cfe79b.tar.gz glibc-01dbacd22a8d5e0053f8d0cf13a80286b6cfe79b.tar.xz glibc-01dbacd22a8d5e0053f8d0cf13a80286b6cfe79b.zip | |
Fix cacos (+Inf + finite*i) in round-downward mode (bug 16928).
According to C99/C11 Annex G, cacos applied to a value with real part +Inf and finite imaginary part should produce a result with real part +0. glibc wrongly produces a result with real part -0 in FE_DOWNWARD mode. This patch fixes this by checking for zero results in the relevant case of non-finite arguments (where there should never be a result with -0 real part), and converts the tests of cacos to ALL_RM_TEST. Tested x86_64 and x86 and ulps updated accordingly. [BZ #16928] * math/s_cacos.c (__cacos): Ensure zero real part of result from non-finite arguments is +0. * math/s_cacosf.c (__cacosf): Likewise. * math/s_cacosl.c (__cacosl): Likewise. * math/libm-test.inc (cacos_test): Use ALL_RM_TEST. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise.
Diffstat (limited to 'posix')
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