1/* @(#)e_scalb.c 5.1 93/09/24 */
2/*
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
5 *
6 * Developed at SunPro, a Sun Microsystems, Inc. business.
7 * Permission to use, copy, modify, and distribute this
8 * software is freely granted, provided that this notice
9 * is preserved.
10 * ====================================================
11 */
12
13#ifndef lint
| 1/* @(#)e_scalb.c 5.1 93/09/24 */
2/*
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
5 *
6 * Developed at SunPro, a Sun Microsystems, Inc. business.
7 * Permission to use, copy, modify, and distribute this
8 * software is freely granted, provided that this notice
9 * is preserved.
10 * ====================================================
11 */
12
13#ifndef lint
|
14static char rcsid[] = "$FreeBSD: head/lib/msun/src/e_scalb.c 21673 1997-01-14 07:20:47Z jkh $";
| 14static char rcsid[] = "$FreeBSD: head/lib/msun/src/e_scalb.c 22808 1997-02-16 18:26:31Z bde $";
|
15#endif
16
17/*
18 * __ieee754_scalb(x, fn) is provide for
19 * passing various standard test suite. One
20 * should use scalbn() instead.
21 */
22
23#include "math.h"
24#include "math_private.h"
25
26#ifdef _SCALB_INT
27#ifdef __STDC__
| 15#endif
16
17/*
18 * __ieee754_scalb(x, fn) is provide for
19 * passing various standard test suite. One
20 * should use scalbn() instead.
21 */
22
23#include "math.h"
24#include "math_private.h"
25
26#ifdef _SCALB_INT
27#ifdef __STDC__
|
28 double __ieee754_scalb(double x, int fn)
| 28 double __generic___ieee754_scalb(double x, int fn)
|
29#else
| 29#else
|
30 double __ieee754_scalb(x,fn)
| 30 double __generic___ieee754_scalb(x,fn)
|
31 double x; int fn;
32#endif
33#else
34#ifdef __STDC__
| 31 double x; int fn;
32#endif
33#else
34#ifdef __STDC__
|
35 double __ieee754_scalb(double x, double fn)
| 35 double __generic___ieee754_scalb(double x, double fn)
|
36#else
| 36#else
|
37 double __ieee754_scalb(x,fn)
| 37 double __generic___ieee754_scalb(x,fn)
|
38 double x, fn;
39#endif
40#endif
41{
42#ifdef _SCALB_INT
43 return scalbn(x,fn);
44#else
45 if (isnan(x)||isnan(fn)) return x*fn;
46 if (!finite(fn)) {
47 if(fn>0.0) return x*fn;
48 else return x/(-fn);
49 }
50 if (rint(fn)!=fn) return (fn-fn)/(fn-fn);
51 if ( fn > 65000.0) return scalbn(x, 65000);
52 if (-fn > 65000.0) return scalbn(x,-65000);
53 return scalbn(x,(int)fn);
54#endif
55}
| 38 double x, fn;
39#endif
40#endif
41{
42#ifdef _SCALB_INT
43 return scalbn(x,fn);
44#else
45 if (isnan(x)||isnan(fn)) return x*fn;
46 if (!finite(fn)) {
47 if(fn>0.0) return x*fn;
48 else return x/(-fn);
49 }
50 if (rint(fn)!=fn) return (fn-fn)/(fn-fn);
51 if ( fn > 65000.0) return scalbn(x, 65000);
52 if (-fn > 65000.0) return scalbn(x,-65000);
53 return scalbn(x,(int)fn);
54#endif
55}
|