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/* @(#)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 ieee_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 ieee_scalbn(x,fn);
#else
if (ieee_isnan(x)||ieee_isnan(fn)) return x*fn;
if (!ieee_finite(fn)) {
if(fn>0.0) return x*fn;
else return x/(-fn);
}
if (ieee_rint(fn)!=fn) return (fn-fn)/(fn-fn);
if ( fn > 65000.0) return ieee_scalbn(x, 65000);
if (-fn > 65000.0) return ieee_scalbn(x,-65000);
return ieee_scalbn(x,(int)fn);
#endif
}
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