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/* @(#)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 ieee_scalb(double x, double fn) is provide for
* passing various standard test suite. One
* should use ieee_scalbn() instead.
*/
#include "fdlibm.h"
#include <errno.h>
#ifdef __STDC__
#ifdef _SCALB_INT
double ieee_scalb(double x, int fn) /* wrapper scalb */
#else
double ieee_scalb(double x, double fn) /* wrapper scalb */
#endif
#else
double ieee_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(!(ieee_finite(z)||ieee_isnan(z))&&ieee_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(!ieee_finite(fn)) errno = ERANGE;
#endif
return z;
#endif
}