Subversion Repositories shark

Rev

Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
2 pj 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
#ifndef lint
17
static char rcsid[] = "$\Id: w_gammaf.c,v 1.2 1995/05/30 05:51:10 rgrimes Exp $";
18
#endif
19
 
20
#include "math.h"
21
#include "math_private.h"
22
 
23
extern int signgam;
24
 
25
#ifdef __STDC__
26
        float gammaf(float x)
27
#else
28
        float gammaf(x)
29
        float x;
30
#endif
31
{
32
#ifdef _IEEE_LIBM
33
        return __ieee754_gammaf_r(x,&signgam);
34
#else
35
        float y;
36
        y = __ieee754_gammaf_r(x,&signgam);
37
        if(_LIB_VERSION == _IEEE_) return y;
38
        if(!finitef(y)&&finitef(x)) {
39
            if(floorf(x)==x&&x<=(float)0.0)
40
                /* gammaf pole */
41
                return (float)__kernel_standard((double)x,(double)x,141);
42
            else
43
                /* gammaf overflow */
44
                return (float)__kernel_standard((double)x,(double)x,140);
45
        } else
46
            return y;
47
#endif
48
}