diff options
Diffstat (limited to 'math/w_tgamma.c')
| -rw-r--r-- | math/w_tgamma.c | 26 |
1 files changed, 6 insertions, 20 deletions
diff --git a/math/w_tgamma.c b/math/w_tgamma.c index 14d6855..976b5fb 100644 --- a/math/w_tgamma.c +++ b/math/w_tgamma.c @@ -10,10 +10,6 @@ * ==================================================== */ -#if defined(LIBM_SCCS) && !defined(lint) -static char rcsid[] = "$NetBSD: w_gamma.c,v 1.7 1995/11/20 22:06:43 jtc Exp $"; -#endif - /* double gamma(double x) * Return the logarithm of the Gamma function of x or the Gamma function of x, * depending on the library mode. @@ -22,23 +18,14 @@ static char rcsid[] = "$NetBSD: w_gamma.c,v 1.7 1995/11/20 22:06:43 jtc Exp $"; #include <math.h> #include <math_private.h> -#ifdef __STDC__ - double __tgamma(double x) -#else - double __tgamma(x) - double x; -#endif +double +__tgamma(double x) { - double y; int local_signgam; - y = __ieee754_gamma_r(x,&local_signgam); - if (local_signgam < 0) y = -y; -#ifdef _IEEE_LIBM - return y; -#else - if(_LIB_VERSION == _IEEE_) return y; + double y = __ieee754_gamma_r(x,&local_signgam); - if(!__finite(y)&&__finite(x)) { + if(__builtin_expect(!__finite(y), 0)&&__finite(x) + && _LIB_VERSION != _IEEE_) { if (x == 0.0) return __kernel_standard(x,x,50); /* tgamma pole */ else if(__floor(x)==x&&x<0.0) @@ -46,8 +33,7 @@ static char rcsid[] = "$NetBSD: w_gamma.c,v 1.7 1995/11/20 22:06:43 jtc Exp $"; else return __kernel_standard(x,x,40); /* tgamma overflow */ } - return y; -#endif + return local_signgam < 0 ? -y : y; } weak_alias (__tgamma, tgamma) #ifdef NO_LONG_DOUBLE |