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authorUlrich Drepper <drepper@gmail.com>2011-10-12 11:27:51 -0400
committerUlrich Drepper <drepper@gmail.com>2011-10-12 11:27:51 -0400
commit0ac5ae2335292908f39031b1ea9fe8edce433c0f (patch)
treef9d26c8abc0de39d18d4c13e70f6022cdc6b461f /math/w_tgammal.c
parenta843a204a3e8a0dd53584dad3668771abaec84ac (diff)
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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.c28
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)