diff options
| 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_tgammal.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_tgammal.c')
| -rw-r--r-- | math/w_tgammal.c | 28 |
1 files changed, 7 insertions, 21 deletions
diff --git a/math/w_tgammal.c b/math/w_tgammal.c index 63379a8575..6910f923aa 100644 --- a/math/w_tgammal.c +++ b/math/w_tgammal.c @@ -14,10 +14,6 @@ * ==================================================== */ -#if defined(LIBM_SCCS) && !defined(lint) -static char rcsid[] = "$NetBSD: $"; -#endif - /* long double gammal(double x) * Return the Gamma function of x. */ @@ -25,31 +21,21 @@ static char rcsid[] = "$NetBSD: $"; #include <math.h> #include <math_private.h> -#ifdef __STDC__ - long double __tgammal(long double x) -#else - long double __tgammal(x) - long double x; -#endif +long double +__tgammal(long double x) { - long double y; int local_signgam; - y = __ieee754_gammal_r(x,&local_signgam); - if (local_signgam < 0) y = -y; -#ifdef _IEEE_LIBM - return y; -#else - if(_LIB_VERSION == _IEEE_) return y; + long double y = __ieee754_gammal_r(x,&local_signgam); - if(!__finitel(y)&&__finitel(x)) { + if(__builtin_expect(!__finitel(y), 0) && __finitel(x) + && _LIB_VERSION != _IEEE_) { if(x==0.0) return __kernel_standard(x,x,250); /* tgamma pole */ - else if(__floorl(x)==x&&x<0.0) + else if(__floorl(x)==x&&x<0.0L) return __kernel_standard(x,x,241); /* tgamma domain */ else return __kernel_standard(x,x,240); /* tgamma overflow */ } - return y; -#endif + return local_signgam < 0 ? - y : y; } weak_alias (__tgammal, tgammal) |