Subversion Repositories shark

Rev

Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
2 pj 1
/* e_scalbf.c -- float version of e_scalb.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: e_scalbf.c,v 1.2 1995/05/30 05:48:45 rgrimes Exp $";
18
#endif
19
 
20
#include "math.h"
21
#include "math_private.h"
22
 
23
#ifdef _SCALB_INT
24
#ifdef __STDC__
25
        float __ieee754_scalbf(float x, int fn)
26
#else
27
        float __ieee754_scalbf(x,fn)
28
        float x; int fn;
29
#endif
30
#else
31
#ifdef __STDC__
32
        float __ieee754_scalbf(float x, float fn)
33
#else
34
        float __ieee754_scalbf(x,fn)
35
        float x, fn;
36
#endif
37
#endif
38
{
39
#ifdef _SCALB_INT
40
        return scalbnf(x,fn);
41
#else
42
        if (isnanf(x)||isnanf(fn)) return x*fn;
43
        if (!finitef(fn)) {
44
            if(fn>(float)0.0) return x*fn;
45
            else       return x/(-fn);
46
        }
47
        if (rintf(fn)!=fn) return (fn-fn)/(fn-fn);
48
        if ( fn > (float)65000.0) return scalbnf(x, 65000);
49
        if (-fn > (float)65000.0) return scalbnf(x,-65000);
50
        return scalbnf(x,(int)fn);
51
#endif
52
}