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| author | Ulrich Drepper <drepper@gmail.com> | 2012-01-28 21:20:06 -0500 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2012-01-28 21:20:06 -0500 |
| commit | 96bc5b45a671de1e266b841edba2516afc46d84a (patch) | |
| tree | edb645d2ef40b80fb2827aa2abf7a6e575a1f20e | |
| parent | 56f6f6a2403cfa7267cad722597113be35ecf70d (diff) | |
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Optimize x86-64 math inline header a bit
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | sysdeps/x86_64/fpu/bits/mathinline.h | 39 |
2 files changed, 38 insertions, 8 deletions
@@ -1,5 +1,12 @@ 2012-01-28 Ulrich Drepper <drepper@gmail.com> + * sysdeps/x86_64/fpu/bits/mathinline.h (__signbitl): Optimize a bit. + Avoid unnecessary __WORDSIZE == 64 test. + (fmaxf): Use VEX format if possible. + (fmax): Likewise. + (fminf): Likewise. + (fmin): Likewise. + * config.h.in: Define HAVE_SSE2AVX_SUPPORT. * math/math_private.h: Remove libc_fegetround* and libc_fesetround*. diff --git a/sysdeps/x86_64/fpu/bits/mathinline.h b/sysdeps/x86_64/fpu/bits/mathinline.h index 1a2c1ee997..038c64ee46 100644 --- a/sysdeps/x86_64/fpu/bits/mathinline.h +++ b/sysdeps/x86_64/fpu/bits/mathinline.h @@ -1,5 +1,5 @@ /* Inline math functions for x86-64. - Copyright (C) 2002-2004, 2007, 2009, 2011 Free Software Foundation, Inc. + Copyright (C) 2002-2004,2007,2009,2011,2012 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -64,21 +64,20 @@ __MATH_INLINE int __NTH (__signbitl (long double __x)) { __extension__ union { long double __l; int __i[3]; } __u = { __l: __x }; - return (__u.__i[2] & 0x8000) != 0; + return __u.__i[2] & 0x8000; } __END_NAMESPACE_C99 #endif -#if (__GNUC_PREREQ (2, 8) && !defined __NO_MATH_INLINES \ - && defined __OPTIMIZE__) +#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__ +# ifdef __SSE_MATH__ __MATH_INLINE long int __NTH (lrintf (float __x)) { @@ -87,7 +86,7 @@ __NTH (lrintf (float __x)) return __res; } # endif -# if __WORDSIZE == 64 || defined __SSE2_MATH__ +# ifdef __SSE2_MATH__ __MATH_INLINE long int __NTH (lrint (double __x)) { @@ -114,40 +113,64 @@ __NTH (llrint (double __x)) # endif # if defined __FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0 \ - && (__WORDSIZE == 64 || defined __SSE2_MATH__) + && defined __SSE2_MATH__ /* Determine maximum of two values. */ __MATH_INLINE float __NTH (fmaxf (float __x, float __y)) { +# ifdef __AVX__ + float __res; + __asm ("vmaxss %2, %1, %0" : "=x" (__res) : "x" (x), "xm" (__y)); + return __res; +# else __asm ("maxss %1, %0" : "+x" (__x) : "xm" (__y)); return __x; +# endif } __MATH_INLINE double __NTH (fmax (double __x, double __y)) { +# ifdef __AVX__ + float __res; + __asm ("vmaxsd %2, %1, %0" : "=x" (__res) : "x" (x), "xm" (__y)); + return __res; +# else __asm ("maxsd %1, %0" : "+x" (__x) : "xm" (__y)); return __x; +# endif } /* Determine minimum of two values. */ __MATH_INLINE float __NTH (fminf (float __x, float __y)) { +# ifdef __AVX__ + float __res; + __asm ("vminss %2, %1, %0" : "=x" (__res) : "x" (x), "xm" (__y)); + return __res; +# else __asm ("minss %1, %0" : "+x" (__x) : "xm" (__y)); return __x; +# endif } __MATH_INLINE double __NTH (fmin (double __x, double __y)) { +# ifdef __AVX__ + float __res; + __asm ("vminsd %2, %1, %0" : "=x" (__res) : "x" (x), "xm" (__y)); + return __res; +# else __asm ("minsd %1, %0" : "+x" (__x) : "xm" (__y)); return __x; +# endif } # endif __END_NAMESPACE_C99 # endif -# if defined __SSE4_1__ && (__WORDSIZE == 64 || defined __SSE2_MATH__) +# if defined __SSE4_1__ && defined __SSE2_MATH__ # if defined __USE_MISC || defined __USE_XOPEN_EXTENDED || defined __USE_ISOC99 __BEGIN_NAMESPACE_C99 |