source: trunk/sys/libm/w_lgamma_r.c @ 1

Last change on this file since 1 was 1, checked in by alain, 5 years ago

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[1]1
2/* @(#)w_lgamma_r.c 5.1 93/09/24 */
3/*
4 * ====================================================
5 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
6 *
7 * Developed at SunPro, a Sun Microsystems, Inc. business.
8 * Permission to use, copy, modify, and distribute this
9 * software is freely granted, provided that this notice
10 * is preserved.
11 * ====================================================
12 */
13
14/*
15 * wrapper double lgamma_r(double x, int *signgamp)
16 */
17
18#include <libm/fdlibm.h>
19
20
21#ifdef __STDC__
22        double lgamma_r(double x, int *signgamp) /* wrapper lgamma_r */
23#else
24        double lgamma_r(x,signgamp)              /* wrapper lgamma_r */
25        double x; int *signgamp;
26#endif
27{
28#ifdef _IEEE_LIBM
29        return __ieee754_lgamma_r(x,signgamp);
30#else
31        double y;
32        y = __ieee754_lgamma_r(x,signgamp);
33        if(_LIB_VERSION == _IEEE_) return y;
34        if(!finite(y)&&finite(x)) {
35            if(floor(x)==x&&x<=0.0)
36                return __kernel_standard(x,x,15); /* lgamma pole */
37            else
38                return __kernel_standard(x,x,14); /* lgamma overflow */
39        } else
40            return y;
41#endif
42}             
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