/* @(#)w_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.

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

 */

/*

 * wrapper scalb(double x, double fn) is provide for

 * passing various standard test suite. One 

 * should use scalbn() instead.

 */

#include "fdlibm.h"

#include <errno.h>

#ifdef __STDC__

#ifdef _SCALB_INT

	double scalb(double x, int fn)		/* wrapper scalb */

#else

	double scalb(double x, double fn)	/* wrapper scalb */

#endif

#else

	double scalb(x,fn)			/* wrapper scalb */

#ifdef _SCALB_INT

	double x; int fn;

#else

	double x,fn;

#endif

#endif

{

#ifdef _IEEE_LIBM

	return __ieee754_scalb(x,fn);

#else

	double z;

	z = __ieee754_scalb(x,fn);

	if(_LIB_VERSION == _IEEE_) return z;

	if(!(finite(z)||isnan(z))&&finite(x)) {

	    return __kernel_standard(x,(double)fn,32); /* scalb overflow */

	}

	if(z==0.0&&z!=x) {

	    return __kernel_standard(x,(double)fn,33); /* scalb underflow */

	} 

#ifndef _SCALB_INT

	if(!finite(fn)) errno = ERANGE;

#endif

	return z;

#endif 

}