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| author | Joseph Myers <joseph@codesourcery.com> | 2016-05-25 17:42:22 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2016-05-25 17:42:22 +0000 |
| commit | b4d80349bb8b91fd64d6e860af5c0bd503b15f97 (patch) | |
| tree | 007abd8bf922c13d444272dac1a88783a1dc8b6e /ChangeLog | |
| parent | 1f921a93e4fd0b5ccd18a3e7d5a0511bcd2464fa (diff) | |
| download | glibc-b4d80349bb8b91fd64d6e860af5c0bd503b15f97.tar.gz glibc-b4d80349bb8b91fd64d6e860af5c0bd503b15f97.tar.xz glibc-b4d80349bb8b91fd64d6e860af5c0bd503b15f97.zip | |
Do not raise "inexact" from powerpc64 ceil, floor, trunc (bug 15479).
Continuing fixes for ceil, floor and trunc functions not to raise the "inexact" exception, this patch fixes the versions used on older powerpc64 processors. As was done with the round implementations some time ago, the save of floating-point state is moved after the first floating-point operation on the input to ensure that any "invalid" exception from signaling NaN input is included in the saved state, and then the whole state gets restored rather than just the rounding mode. This has no effect on configurations using the power5+ code, since such processors can do these operations with a single instruction (and those instructions do not set "inexact", so are correct for TS 18661-1 semantics). Tested for powerpc64. [BZ #15479] * sysdeps/powerpc/powerpc64/fpu/s_ceil.S (__ceil): Move save of floating-point state after first floating-point operation on input. Restore full floating-point state instead of just rounding mode. * sysdeps/powerpc/powerpc64/fpu/s_ceilf.S (__ceilf): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_floor.S (__floor): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_floorf.S (__floorf): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_trunc.S (__trunc): Likewise. * sysdeps/powerpc/powerpc64/fpu/s_truncf.S (__truncf): Likewise.
Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index 4564571809..89c2a9c0f5 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,6 +1,17 @@ 2016-05-25 Joseph Myers <joseph@codesourcery.com> [BZ #15479] + * sysdeps/powerpc/powerpc64/fpu/s_ceil.S (__ceil): Move save of + floating-point state after first floating-point operation on + input. Restore full floating-point state instead of just rounding + mode. + * sysdeps/powerpc/powerpc64/fpu/s_ceilf.S (__ceilf): Likewise. + * sysdeps/powerpc/powerpc64/fpu/s_floor.S (__floor): Likewise. + * sysdeps/powerpc/powerpc64/fpu/s_floorf.S (__floorf): Likewise. + * sysdeps/powerpc/powerpc64/fpu/s_trunc.S (__trunc): Likewise. + * sysdeps/powerpc/powerpc64/fpu/s_truncf.S (__truncf): Likewise. + + [BZ #15479] * sysdeps/powerpc/powerpc32/fpu/s_ceil.S (__ceil): Move save of floating-point state after first floating-point operation on input. Restore full floating-point state instead of just rounding |