mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-27 07:20:11 +00:00
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
/* w_gammaf.c -- float version of w_gamma.c.
|
|
* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
|
|
*/
|
|
|
|
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
* Developed at SunPro, a Sun Microsystems, Inc. business.
|
|
* Permission to use, copy, modify, and distribute this
|
|
* software is freely granted, provided that this notice
|
|
* is preserved.
|
|
* ====================================================
|
|
*/
|
|
|
|
#include <math.h>
|
|
#include <math_private.h>
|
|
|
|
float
|
|
__tgammaf(float x)
|
|
{
|
|
int local_signgam;
|
|
float y = __ieee754_gammaf_r(x,&local_signgam);
|
|
|
|
if(__builtin_expect(!__finitef(y), 0)
|
|
&& (__finitef (x) || __isinff (x) < 0)
|
|
&& _LIB_VERSION != _IEEE_) {
|
|
if (x == (float)0.0)
|
|
/* tgammaf pole */
|
|
return __kernel_standard_f(x, x, 150);
|
|
else if(__floorf(x)==x&&x<0.0f)
|
|
/* tgammaf domain */
|
|
return __kernel_standard_f(x, x, 141);
|
|
else
|
|
/* tgammaf overflow */
|
|
return __kernel_standard_f(x, x, 140);
|
|
}
|
|
return local_signgam < 0 ? - y : y;
|
|
}
|
|
weak_alias (__tgammaf, tgammaf)
|