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 * ====================================================
14 * scalb(x, fn) is provide for
15 * passing various standard test suite. One
16 * should use scalbn() instead.
20 #include "math_private.h"
24 scalb(double x, int fn)
32 scalb(double x, double fn)
34 if (isnan(x)||isnan(fn)) return x*fn;
36 if(fn>0.0) return x*fn;
39 if (rint(fn)!=fn) return (fn-fn)/(fn-fn);
40 if ( fn > 65000.0) return scalbn(x, 65000);
41 if (-fn > 65000.0) return scalbn(x,-65000);
42 return scalbn(x,(int)fn);