1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
/* 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.
* ====================================================
*/
#if defined(LIBM_SCCS) && !defined(lint)
static char rcsid[] = "$NetBSD: w_gammaf.c,v 1.4 1995/11/20 22:06:48 jtc Exp $";
#endif
#include "math.h"
#include "math_private.h"
extern int signgam;
#ifdef __STDC__
float __gammaf(float x)
#else
float __gammaf(x)
float x;
#endif
{
#ifdef _IEEE_LIBM
return __ieee754_lgammaf_r(x,&signgam);
#else
float y;
y = __ieee754_lgammaf_r(x,&signgam);
if(_LIB_VERSION == _IEEE_) return y;
if(!__finitef(y)&&__finitef(x)) {
if(__floorf(x)==x&&x<=(float)0.0)
/* gammaf pole */
return (float)__kernel_standard((double)x,(double)x,141);
else
/* gammaf overflow */
return (float)__kernel_standard((double)x,(double)x,140);
} else
return y;
#endif
}
weak_alias (__gammaf, gammaf)
|
