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 * ====================================================
13 #if defined(LIBM_SCCS) && !defined(lint)
14 static char rcsid[] = "$NetBSD: e_scalb.c,v 1.6 1995/05/10 20:46:09 jtc Exp $";
18 * __ieee754_scalb(x, fn) is provide for
19 * passing various standard test suite. One
20 * should use scalbn() instead.
24 #include "math_private.h"
28 double __ieee754_scalb(double x, int fn)
30 double __ieee754_scalb(x,fn)
35 double __ieee754_scalb(double x, double fn)
37 double __ieee754_scalb(x,fn)
45 if (isnan(x)||isnan(fn)) return x*fn;
47 if(fn>0.0) return x*fn;
50 if (rint(fn)!=fn) return (fn-fn)/(fn-fn);
51 if ( fn > 65000.0) return scalbn(x, 65000);
52 if (-fn > 65000.0) return scalbn(x,-65000);
53 return scalbn(x,(int)fn);