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| author | Ulrich Drepper <drepper@gmail.com> | 2011-10-17 11:23:40 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-17 11:23:40 -0400 |
| commit | ed22dcf691326d148222eb9a215d6d98bb8073a4 (patch) | |
| tree | 9a7f83e6295b8ac6610e6637defc66f693ea252c /sysdeps/x86_64/fpu/bits | |
| parent | b171c137687dd4328f756d141d17f30bae750079 (diff) | |
| download | glibc-ed22dcf691326d148222eb9a215d6d98bb8073a4.tar.gz glibc-ed22dcf691326d148222eb9a215d6d98bb8073a4.tar.xz glibc-ed22dcf691326d148222eb9a215d6d98bb8073a4.zip | |
Provide internal optimizations on x86-64 with SSE4.1
Provide macros so that the internal users can, if possible, directly use the new instructions. Also fix up the mathinline.h header when compiling with SSE4.1 enabled.
Diffstat (limited to 'sysdeps/x86_64/fpu/bits')
| -rw-r--r-- | sysdeps/x86_64/fpu/bits/mathinline.h | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/sysdeps/x86_64/fpu/bits/mathinline.h b/sysdeps/x86_64/fpu/bits/mathinline.h index 210bef8102..721f6e4731 100644 --- a/sysdeps/x86_64/fpu/bits/mathinline.h +++ b/sysdeps/x86_64/fpu/bits/mathinline.h @@ -30,34 +30,35 @@ #endif -#if defined __GNUC__ && __GNUC__ >= 2 -# ifdef __USE_ISOC99 +/* The gcc, version 2.7 or below, has problems with all this inlining + code. So disable it for this version of the compiler. */ +#if __GNUC_PREREQ (2, 8) && defined __USE_ISOC99 __BEGIN_NAMESPACE_C99 /* Test for negative number. Used in the signbit() macro. */ __MATH_INLINE int __NTH (__signbitf (float __x)) { -# if __WORDSIZE == 32 +# if __WORDSIZE == 32 __extension__ union { float __f; int __i; } __u = { __f: __x }; return __u.__i < 0; -# else +# else int __m; __asm ("pmovmskb %1, %0" : "=r" (__m) : "x" (__x)); return __m & 0x8; -# endif +# endif } __MATH_INLINE int __NTH (__signbit (double __x)) { -# if __WORDSIZE == 32 +# if __WORDSIZE == 32 __extension__ union { double __d; int __i[2]; } __u = { __d: __x }; return __u.__i[1] < 0; -# else +# else int __m; __asm ("pmovmskb %1, %0" : "=r" (__m) : "x" (__x)); return __m & 0x80; -# endif +# endif } __MATH_INLINE int __NTH (__signbitl (long double __x)) @@ -66,6 +67,16 @@ __NTH (__signbitl (long double __x)) return (__u.__i[2] & 0x8000) != 0; } +__END_NAMESPACE_C99 +#endif + + +#if (__GNUC_PREREQ (2, 8) && !defined __NO_MATH_INLINES \ + && defined __OPTIMIZE__) + +# ifdef __USE_ISOC99 +__BEGIN_NAMESPACE_C99 + /* Round to nearest integer. */ # if __WORDSIZE == 64 || defined __SSE_MATH__ __MATH_INLINE long int @@ -100,14 +111,10 @@ __NTH (llrint (double __x)) __asm ("cvtsd2si %1, %0" : "=r" (__res) : "xm" (__x)); return __res; } - -__END_NAMESPACE_C99 # endif # if defined __FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0 \ && (__WORDSIZE == 64 || defined __SSE2_MATH__) -__BEGIN_NAMESPACE_C99 - /* Determine maximum of two values. */ __MATH_INLINE float __NTH (fmaxf (float __x, float __y)) |