1 /* w_gammaf.c -- float version of w_gamma.c.
2  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3  */
4 
5 /*
6  * ====================================================
7  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8  *
9  * Developed at SunPro, a Sun Microsystems, Inc. business.
10  * Permission to use, copy, modify, and distribute this
11  * software is freely granted, provided that this notice
12  * is preserved.
13  * ====================================================
14  */
15 
16 #include "math.h"
17 
18 #ifdef __STDC__
tgammaf(float x)19 	float tgammaf(float x)
20 #else
21 	float tgammaf(x)
22 	float x;
23 #endif
24 {
25         float y;
26 	int local_signgam;
27 	y = __ieee754_gammaf_r(x,&local_signgam);
28 	if (local_signgam < 0) y = -y;
29 #ifdef _IEEE_LIBM
30 	return y;
31 #else
32 	if(_LIB_VERSION == _IEEE_) return y;
33 
34 	if(!finitef(y)&&finitef(x)) {
35 	  if(floorf(x)==x&&x<=(float)0.0)
36 	    /* tgammaf pole */
37 	    return (float)__kernel_standard((double)x,(double)x,141);
38 	  else
39 	    /* tgammaf overflow */
40 	    return (float)__kernel_standard((double)x,(double)x,140);
41 	}
42 	return y;
43 #endif
44 }
45