OpenCores
URL https://opencores.org/ocsvn/or1k/or1k/trunk

Subversion Repositories or1k

[/] [or1k/] [trunk/] [newlib-1.10.0/] [newlib/] [libm/] [math/] [wr_gamma.c] - Blame information for rev 1773

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 1010 ivang 
 
2 
/* @(#)wr_gamma.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 gamma_r(double x, int *signgamp)
16 
 */
17 
 
18 
#include "fdlibm.h"
19 
#include <errno.h>
20 
 
21 
#ifndef _DOUBLE_IS_32BITS
22 
 
23 
#ifdef __STDC__
24 
        double gamma_r(double x, int *signgamp) /* wrapper lgamma_r */
25 
#else
26 
        double gamma_r(x,signgamp)              /* wrapper lgamma_r */
27 
        double x; int *signgamp;
28 
#endif
29 
{
30 
#ifdef _IEEE_LIBM
31 
        return __ieee754_gamma_r(x,signgamp);
32 
#else
33 
        double y;
34 
        struct exception exc;
35 
        y = __ieee754_gamma_r(x,signgamp);
36 
        if(_LIB_VERSION == _IEEE_) return y;
37 
        if(!finite(y)&&finite(x)) {
38 
#ifndef HUGE_VAL
39 
#define HUGE_VAL inf
40 
            double inf = 0.0;
41 
 
42 
            SET_HIGH_WORD(inf,0x7ff00000);      /* set inf to infinite */
43 
#endif
44 
            exc.name = "gamma";
45 
            exc.err = 0;
46 
            exc.arg1 = exc.arg2 = (double)x;
47 
            if (_LIB_VERSION == _SVID_)
48 
                exc.retval = HUGE;
49 
            else
50 
                exc.retval = HUGE_VAL;
51 
            if(floor(x)==x&&x<=0.0) {
52 
                /* gamma(-integer) or gamma(0) */
53 
                exc.type = SING;
54 
                if (_LIB_VERSION == _POSIX_)
55 
                  errno = EDOM;
56 
                else if (!matherr(&exc)) {
57 
                  errno = EDOM;
58 
                }
59 
            } else {
60 
                /* gamma(finite) overflow */
61 
                exc.type = OVERFLOW;
62 
                if (_LIB_VERSION == _POSIX_)
63 
                  errno = ERANGE;
64 
                else if (!matherr(&exc)) {
65 
                  errno = ERANGE;
66 
                }
67 
            }
68 
            if (exc.err != 0)
69 
               errno = exc.err;
70 
            return exc.retval;
71 
        } else
72 
            return y;
73 
#endif
74 
}
75 
 
76 
#endif /* defined(_DOUBLE_IS_32BITS) */

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.