blob: 0cc091f124347f7e4c4eb8726142a06d66890326 (
plain) (
blame)
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
|
/* origin: FreeBSD /usr/src/lib/msun/src/e_scalbf.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 "libm.h"
float scalbf(float x, float fn)
{
if (isnan(x) || isnan(fn)) return x*fn;
if (!isfinite(fn)) {
if (fn > (float)0.0)
return x*fn;
else
return x/(-fn);
}
if (rintf(fn) != fn) return (fn-fn)/(fn-fn);
if ( fn > (float)65000.0) return scalbnf(x, 65000);
if (-fn > (float)65000.0) return scalbnf(x,-65000);
return scalbnf(x,(int)fn);
}
|
