1 /* @(#)e_scalb.c 5.1 93/09/24 */
3 * ====================================================
4 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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
10 * ====================================================
12 * $NetBSD: e_scalb.c,v 1.10 2010/04/23 19:17:07 drochner Exp $
16 * scalb(x, fn) is provide for
17 * passing various standard test suite. One
18 * should use scalbn() instead.
22 #include "math_private.h"
26 scalb(double x, int fn)
29 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);