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| author | Ulrich Drepper <drepper@gmail.com> | 2011-10-12 11:27:51 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-12 11:27:51 -0400 |
| commit | 0ac5ae2335292908f39031b1ea9fe8edce433c0f (patch) | |
| tree | f9d26c8abc0de39d18d4c13e70f6022cdc6b461f /math/w_tgammaf.c | |
| parent | a843a204a3e8a0dd53584dad3668771abaec84ac (diff) | |
| download | glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.tar.gz glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.tar.xz glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.zip | |
Optimize libm
libm is now somewhat integrated with gcc's -ffinite-math-only option and lots of the wrapper functions have been optimized.
Diffstat (limited to 'math/w_tgammaf.c')
| -rw-r--r-- | math/w_tgammaf.c | 34 |
1 files changed, 10 insertions, 24 deletions
diff --git a/math/w_tgammaf.c b/math/w_tgammaf.c index b1e72c653d..48141354e2 100644 --- a/math/w_tgammaf.c +++ b/math/w_tgammaf.c @@ -13,41 +13,27 @@ * ==================================================== */ -#if defined(LIBM_SCCS) && !defined(lint) -static char rcsid[] = "$NetBSD: w_gammaf.c,v 1.4 1995/11/20 22:06:48 jtc Exp $"; -#endif - #include <math.h> #include <math_private.h> -#ifdef __STDC__ - float __tgammaf(float x) -#else - float __tgammaf(x) - float x; -#endif +float +__tgammaf(float x) { - float y; int local_signgam; - y = __ieee754_gammaf_r(x,&local_signgam); - if (local_signgam < 0) y = -y; -#ifdef _IEEE_LIBM - return y; -#else - if(_LIB_VERSION == _IEEE_) return y; + float y = __ieee754_gammaf_r(x,&local_signgam); - if(!__finitef(y)&&__finitef(x)) { + if(__builtin_expect(!__finitef(y), 0) && __finitef(x) + && _LIB_VERSION != _IEEE_) { if (x == (float)0.0) /* tgammaf pole */ - return (float)__kernel_standard((double)x,(double)x,150); - else if(__floorf(x)==x&&x<(float)0.0) + return __kernel_standard_f(x, x, 150); + else if(__floorf(x)==x&&x<0.0f) /* tgammaf domain */ - return (float)__kernel_standard((double)x,(double)x,141); + return __kernel_standard_f(x, x, 141); else /* tgammaf overflow */ - return (float)__kernel_standard((double)x,(double)x,140); + return __kernel_standard_f(x, x, 140); } - return y; -#endif + return local_signgam < 0 ? - y : y; } weak_alias (__tgammaf, tgammaf) |