2 /* @(#)e_scalb.c 1.3 95/01/18 */
4 * ====================================================
5 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
7 * Developed at SunSoft, a Sun Microsystems, Inc. business.
8 * Permission to use, copy, modify, and distribute this
9 * software is freely granted, provided that this notice
11 * ====================================================
15 static char rcsid[] = "$FreeBSD$";
19 * __ieee754_scalb(x, fn) is provide for
20 * passing various standard test suite. One
21 * should use scalbn() instead.
25 #include "math_private.h"
29 __ieee754_scalb(double x, int fn)
32 __ieee754_scalb(double x, double fn)
38 if (isnan(x)||isnan(fn)) return x*fn;
40 if(fn>0.0) return x*fn;
43 if (rint(fn)!=fn) return (fn-fn)/(fn-fn);
44 if ( fn > 65000.0) return scalbn(x, 65000);
45 if (-fn > 65000.0) return scalbn(x,-65000);
46 return scalbn(x,(int)fn);