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/* @(#)w_pow.c 5.2 93/10/01 */

/*

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

 * 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.

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

 */

/*

 * wrapper pow(x,y) return x**y

 */

#include "math.h"

#include "math_private.h"

#ifdef __STDC__

        double pow(double x, double y)  /* wrapper pow */

#else

        double pow(x,y)                 /* wrapper pow */

        double x,y;

#endif

{

#ifdef _IEEE_LIBM

        return  __ieee754_pow(x,y);

#else

        double z;

        z=__ieee754_pow(x,y);

        if(_LIB_VERSION == _IEEE_|| isnan(y)) return z;

        if(isnan(x)) {

            if(y==0.0)

                return __kernel_standard(x,y,42); /* pow(NaN,0.0) */

            else

                return z;

        }

        if(x==0.0){

            if(y==0.0)

                return __kernel_standard(x,y,20); /* pow(0.0,0.0) */

            if(finite(y)&&y<0.0)

                return __kernel_standard(x,y,23); /* pow(0.0,negative) */

            return z;

        }

        if(!finite(z)) {

            if(finite(x)&&finite(y)) {

                if(isnan(z))

                    return __kernel_standard(x,y,24); /* pow neg**non-int */

                else

                    return __kernel_standard(x,y,21); /* pow overflow */

            }

        }

        if(z==0.0&&finite(x)&&finite(y))

            return __kernel_standard(x,y,22); /* pow underflow */

        return z;

#endif

}