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/* @(#)w_exp.c 5.1 93/09/24 */

/*

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

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

 *

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

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

 * software is freely granted, provided that this notice

 * is preserved.

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

 */

#if defined(LIBM_SCCS) && !defined(lint)

static char rcsid[] = "$NetBSD: w_exp.c,v 1.6 1995/05/10 20:48:51 jtc Exp $";

#endif

/*

 * wrapper exp(x)

 */

#include "math.h"

#include "math_private.h"

#ifdef __STDC__

static const double

#else

static double

#endif

o_threshold=  7.09782712893383973096e+02,  /* 0x40862E42, 0xFEFA39EF */

u_threshold= -7.45133219101941108420e+02;  /* 0xc0874910, 0xD52D3051 */

#ifdef __STDC__

        double exp(double x)            /* wrapper exp */

#else

        double exp(x)                   /* wrapper exp */

        double x;

#endif

{

#ifdef _IEEE_LIBM

        return __ieee754_exp(x);

#else

        double z;

        z = __ieee754_exp(x);

        if(_LIB_VERSION == _IEEE_) return z;

        if(finite(x)) {

            if(x>o_threshold)

                return __kernel_standard(x,x,6); /* exp overflow */

            else if(x<u_threshold)

                return __kernel_standard(x,x,7); /* exp underflow */

        }

        return z;

#endif

}