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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_lgammal.c | |
| parent | a843a204a3e8a0dd53584dad3668771abaec84ac (diff) | |
| download | glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.zip glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.tar.gz glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.tar.bz2 | |
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_lgammal.c')
| -rw-r--r-- | math/w_lgammal.c | 43 |
1 files changed, 16 insertions, 27 deletions
diff --git a/math/w_lgammal.c b/math/w_lgammal.c index 0176243..7df38e7 100644 --- a/math/w_lgammal.c +++ b/math/w_lgammal.c @@ -14,10 +14,6 @@ * ==================================================== */ -#if defined(LIBM_SCCS) && !defined(lint) -static char rcsid[] = "$NetBSD: $"; -#endif - /* long double lgammal(long double x) * Return the logarithm of the Gamma function of x. * @@ -27,31 +23,24 @@ static char rcsid[] = "$NetBSD: $"; #include <math.h> #include <math_private.h> -#ifdef __STDC__ - long double __lgammal(long double x) -#else - long double __lgammal(x) - long double x; -#endif +long double +__lgammal(long double x) { -#ifdef _IEEE_LIBM - return __ieee754_lgammal_r(x,&signgam); -#else - long double y; int local_signgam = 0; - y = __ieee754_lgammal_r(x,&local_signgam); - if (_LIB_VERSION != _ISOC_) - /* ISO C99 does not define the global variable. */ - signgam = local_signgam; - if(_LIB_VERSION == _IEEE_) return y; - if(!__finitel(y)&&__finitel(x)) { - if(__floorl(x)==x&&x<=0.0) - return __kernel_standard(x,x,215); /* lgamma pole */ - else - return __kernel_standard(x,x,214); /* lgamma overflow */ - } else - return y; -#endif + long double y = __ieee754_lgammal_r(x, + _LIB_VERSION != _ISOC_ + /* ISO C99 does not define the + global variable. */ + ? &signgam + : &local_signgam); + if(__builtin_expect(!__finitel(y), 0) + && __finitel(x) && _LIB_VERSION != _IEEE_) + return __kernel_standard(x, x, + __floorl(x)==x&&x<=0.0L + ? 215 /* lgamma pole */ + : 214); /* lgamma overflow */ + + return y; } weak_alias (__lgammal, lgammal) strong_alias (__lgammal, __gammal) |