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s_ldexp.c
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s_ldexp.c
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/* @(#)s_ldexp.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.
* ====================================================
*/
#include <errno.h>
#include <math.h>
#include "redmath.h"
double fdm_ldexp(double value, int exp)
{
if(!isfinite(value)||value==0.0) return value;
value = fdm_scalbn(value,exp);
if(!isfinite(value)||value==0.0) errno = ERANGE;
return value;
}