1/* origin: FreeBSD /usr/src/lib/msun/src/e_scalbf.c */
2/*
3 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
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#define _GNU_SOURCE
17#include <math.h>
18
19float scalbf(float x, float fn)
20{
21	if (isnan(x) || isnan(fn)) return x*fn;
22	if (!isfinite(fn)) {
23		if (fn > 0.0f)
24			return x*fn;
25		else
26			return x/(-fn);
27	}
28	if (rintf(fn) != fn) return (fn-fn)/(fn-fn);
29	if ( fn > 65000.0f) return scalbnf(x, 65000);
30	if (-fn > 65000.0f) return scalbnf(x,-65000);
31	return scalbnf(x,(int)fn);
32}
33