/* @(#)e_scalb.c 1.3 95/01/18 */

/*

 * ====================================================

 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.

 *

 * Developed at SunSoft, a Sun Microsystems, Inc. business.

 * Permission to use, copy, modify, and distribute this

 * software is freely granted, provided that this notice 

 * is preserved.

 * ====================================================

 */

/*

 * __ieee754_scalb(x, fn) is provide for

 * passing various standard test suite. One 

 * should use scalbn() instead.

 */

#include "fdlibm.h"

#ifdef _SCALB_INT

#ifdef __STDC__

	double __ieee754_scalb(double x, int fn)

#else

	double __ieee754_scalb(x,fn)

	double x; int fn;

#endif

#else

#ifdef __STDC__

	double __ieee754_scalb(double x, double fn)

#else

	double __ieee754_scalb(x,fn)

	double x, fn;

#endif

#endif

{

#ifdef _SCALB_INT

	return scalbn(x,fn);

#else

	if (isnan(x)||isnan(fn)) return x*fn;

	if (!finite(fn)) {

	    if(fn>0.0) return x*fn;

	    else       return x/(-fn);

	}

	if (rint(fn)!=fn) return (fn-fn)/(fn-fn);

	if ( fn > 65000.0) return scalbn(x, 65000);

	if (-fn > 65000.0) return scalbn(x,-65000);

	return scalbn(x,(int)fn);

#endif

}