1df930be7Sderaadt /* e_scalbf.c -- float version of e_scalb.c.
2df930be7Sderaadt * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3df930be7Sderaadt */
4df930be7Sderaadt
5df930be7Sderaadt /*
6df930be7Sderaadt * ====================================================
7df930be7Sderaadt * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8df930be7Sderaadt *
9df930be7Sderaadt * Developed at SunPro, a Sun Microsystems, Inc. business.
10df930be7Sderaadt * Permission to use, copy, modify, and distribute this
11df930be7Sderaadt * software is freely granted, provided that this notice
12df930be7Sderaadt * is preserved.
13df930be7Sderaadt * ====================================================
14df930be7Sderaadt */
15df930be7Sderaadt
16df930be7Sderaadt #include "math.h"
17df930be7Sderaadt #include "math_private.h"
18df930be7Sderaadt
19df930be7Sderaadt #ifdef _SCALB_INT
20e7beb4a7Smillert float
scalbf(float x,int fn)217b36286aSmartynas scalbf(float x, int fn)
22df930be7Sderaadt {
23df930be7Sderaadt return scalbnf(x,fn);
24e7beb4a7Smillert }
25*2f2c0062Sguenther DEF_NONSTD(scalbf);
26e7beb4a7Smillert
27df930be7Sderaadt #else
28e7beb4a7Smillert
29e7beb4a7Smillert float
scalbf(float x,float fn)307b36286aSmartynas scalbf(float x, float fn)
31e7beb4a7Smillert {
32eab01a26Sguenther if (isnan(x)||isnan(fn)) return x*fn;
33eab01a26Sguenther if (!isfinite(fn)) {
34df930be7Sderaadt if(fn>(float)0.0) return x*fn;
35df930be7Sderaadt else return x/(-fn);
36df930be7Sderaadt }
37df930be7Sderaadt if (rintf(fn)!=fn) return (fn-fn)/(fn-fn);
38df930be7Sderaadt if ( fn > (float)65000.0) return scalbnf(x, 65000);
39df930be7Sderaadt if (-fn > (float)65000.0) return scalbnf(x,-65000);
40df930be7Sderaadt return scalbnf(x,(int)fn);
41df930be7Sderaadt }
42*2f2c0062Sguenther DEF_NONSTD(scalbf);
43e7beb4a7Smillert #endif
44