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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_hypot.c | |
| parent | a843a204a3e8a0dd53584dad3668771abaec84ac (diff) | |
| download | glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.tar glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.tar.gz glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.tar.bz2 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_hypot.c')
| -rw-r--r-- | math/w_hypot.c | 29 |
1 files changed, 8 insertions, 21 deletions
diff --git a/math/w_hypot.c b/math/w_hypot.c index df69ed383b..2c6de28600 100644 --- a/math/w_hypot.c +++ b/math/w_hypot.c @@ -10,10 +10,6 @@ * ==================================================== */ -#if defined(LIBM_SCCS) && !defined(lint) -static char rcsid[] = "$NetBSD: w_hypot.c,v 1.6 1995/05/10 20:49:07 jtc Exp $"; -#endif - /* * wrapper hypot(x,y) */ @@ -22,24 +18,15 @@ static char rcsid[] = "$NetBSD: w_hypot.c,v 1.6 1995/05/10 20:49:07 jtc Exp $"; #include <math_private.h> -#ifdef __STDC__ - double __hypot(double x, double y)/* wrapper hypot */ -#else - double __hypot(x,y) /* wrapper hypot */ - double x,y; -#endif +double +__hypot (double x, double y) { -#ifdef _IEEE_LIBM - return __ieee754_hypot(x,y); -#else - double z; - z = __ieee754_hypot(x,y); - if(_LIB_VERSION == _IEEE_) return z; - if((!__finite(z))&&__finite(x)&&__finite(y)) - return __kernel_standard(x,y,4); /* hypot overflow */ - else - return z; -#endif + double z = __ieee754_hypot(x,y); + if(__builtin_expect(!__finite(z), 0) + && __finite(x) && __finite(y) && _LIB_VERSION != _IEEE_) + return __kernel_standard(x, y, 4); /* hypot overflow */ + + return z; } weak_alias (__hypot, hypot) #ifdef NO_LONG_DOUBLE |