2 /* @(#)e_scalb.c 1.3 95/01/18 */
3 /* $FreeBSD: head/lib/msun/src/e_scalb.c 176451 2008-02-22 02:30:36Z das $ */
5 * ====================================================
6 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8 * Developed at SunSoft, a Sun Microsystems, Inc. business.
9 * Permission to use, copy, modify, and distribute this
10 * software is freely granted, provided that this notice
12 * ====================================================
16 * __ieee754_scalb(x, fn) is provide for
17 * passing various standard test suite. One
18 * should use scalbn() instead.
22 #include "math_private.h"
26 __ieee754_scalb(double x, int fn)
29 __ieee754_scalb(double x, double fn)
35 if (isnan(x)||isnan(fn)) return x*fn;
37 if(fn>0.0) return x*fn;
40 if (rint(fn)!=fn) return (fn-fn)/(fn-fn);
41 if ( fn > 65000.0) return scalbn(x, 65000);
42 if (-fn > 65000.0) return scalbn(x,-65000);
43 return scalbn(x,(int)fn);