52 lines
1.1 KiB
C
52 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 <errno.h>
|
|
|
|
#ifdef __STDC__
|
|
float tgammaf(float x)
|
|
#else
|
|
float tgammaf(x)
|
|
float x;
|
|
#endif
|
|
{
|
|
float y;
|
|
int local_signgam;
|
|
y = gammaf_r(x,&local_signgam);
|
|
if (local_signgam < 0) y = -y;
|
|
#ifdef _IEEE_LIBM
|
|
return y;
|
|
#else
|
|
if(_LIB_VERSION == _IEEE_) return y;
|
|
|
|
if(!finitef(y)&&finitef(x)) {
|
|
if(floorf(x)==x&&x<=(float)0.0)
|
|
{
|
|
/* tgammaf pole */
|
|
errno = EDOM;
|
|
return HUGE_VAL;
|
|
}
|
|
else
|
|
{
|
|
/* tgammaf overflow */
|
|
errno = ERANGE;
|
|
return HUGE_VAL;
|
|
}
|
|
}
|
|
return y;
|
|
#endif
|
|
}
|