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
|
/* 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 <errno.h>
#include <math.h>
#include <math_private.h>
float
__tgammaf(float x)
{
int local_signgam;
float y = __ieee754_gammaf_r(x,&local_signgam);
if(__glibc_unlikely (!__finitef (y) || 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 if (y == 0)
/* tgammaf underflow */
__set_errno (ERANGE);
else
/* tgammaf overflow */
return __kernel_standard_f(x, x, 140);
}
return local_signgam < 0 ? - y : y;
}
weak_alias (__tgammaf, tgammaf)
|
