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author | Joseph Myers <joseph@codesourcery.com> | 2014-03-11 22:30:40 +0000 |
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committer | Joseph Myers <joseph@codesourcery.com> | 2014-03-11 22:30:40 +0000 |
commit | 76c96cf7ec0dc38089c9a887f80b3222f6084c82 (patch) | |
tree | b0bb1b7138d9742ad7879b8f49f1c27a21f31425 /sysdeps/powerpc/powerpc64 | |
parent | 600fa36158cd741d897b2d22c735c60247b982e0 (diff) | |
download | glibc-76c96cf7ec0dc38089c9a887f80b3222f6084c82.tar.gz glibc-76c96cf7ec0dc38089c9a887f80b3222f6084c82.tar.xz glibc-76c96cf7ec0dc38089c9a887f80b3222f6084c82.zip |
Fix MIPS libc_feresetround*_ctx to preserve exceptions.
Testing on mips64 showed missing underflow exceptions (from exp, for example) in non-default rounding modes, caused by libc_feresetround*_ctx wrongly restoring a saved environment without preserving exceptions, when that's only valid for the _noex variants. (I don't know why Steve didn't see this in his testing.) This patch fixes this by using libc_feupdateenv_mips_ctx for the relevant macros and removing the problem definitions. The problem definitions aren't suitable for the _noex macros either because they only discard exceptions in non-default rounding modes, and while for some uses of *_noex/*_NOEX it doesn't matter whether exceptions are discarded, dbl-64/e_remainder.c requires SET_RESTORE_ROUND_NOEX to cause exceptions to be discarded. I think the accumulated set of macros / functions for optimized exception / rounding mode handling could do with a careful review by now, and possible refactoring, and at least one new feature (extracting the saved rounding mode from an environment / context variable - see dbl-64/e_sqrt.c for a case where this could be used). Tested mips64. * sysdeps/mips/math_private.h [__mips_hard_float] (libc_feresetround_ctx): Define to libc_feupdateenv_mips_ctx not libc_feresetround_mips_ctx. [__mips_hard_float] (libc_feresetroundf_ctx): Likewise. [__mips_hard_float] (libc_feresetroundl_ctx): Likewise. [__mips_hard_float] (libc_feresetround_mips_ctx): Remove.
Diffstat (limited to 'sysdeps/powerpc/powerpc64')
0 files changed, 0 insertions, 0 deletions