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| author | Ulrich Drepper <drepper@gmail.com> | 2011-10-18 09:13:23 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-18 09:13:23 -0400 |
| commit | 581d30e386b9567b973a65d0bc82af782ac078ed (patch) | |
| tree | 9c4b80b4e202a38117880ccce87cb8465e2b1f51 /sysdeps/x86_64/fpu/bits | |
| parent | d38f1dba009689d78af371cffa091b27e4ebe17d (diff) | |
| download | glibc-581d30e386b9567b973a65d0bc82af782ac078ed.tar.gz | |
Add optimized nearbyint{,f} for x86-64
Diffstat (limited to 'sysdeps/x86_64/fpu/bits')
| -rw-r--r-- | sysdeps/x86_64/fpu/bits/mathinline.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/bits/mathinline.h b/sysdeps/x86_64/fpu/bits/mathinline.h index 6221958773..57d718db55 100644 --- a/sysdeps/x86_64/fpu/bits/mathinline.h +++ b/sysdeps/x86_64/fpu/bits/mathinline.h @@ -167,6 +167,24 @@ __NTH (rintf (float __x)) return __res; } +#ifdef __USE_ISOC99 +/* Round to nearest integer without raising inexact exception. */ +__MATH_INLINE double +__NTH (nearbyint (double __x)) +{ + double __res; + __asm ("roundsd $0xc, %1, %0" : "=x" (__res) : "xm" (__x)); + return __res; +} +__MATH_INLINE float +__NTH (nearbyintf (float __x)) +{ + float __res; + __asm ("roundss $0xc, %1, %0" : "=x" (__res) : "xm" (__x)); + return __res; +} +#endif + __END_NAMESPACE_C99 # endif |