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/* @(#)w_atan2.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 atan2(y,x)

 */

#include "fdlibm.h"

#ifdef __STDC__

        double atan2(double y, double x)        /* wrapper atan2 */

#else

        double atan2(y,x)                       /* wrapper atan2 */

        double y,x;

#endif

{

#ifdef _IEEE_LIBM

        return __ieee754_atan2(y,x);

#else

        double z;

        z = __ieee754_atan2(y,x);

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

        if(x==0.0&&y==0.0) {

                return __kernel_standard(y,x,3); /* atan2(+-0,+-0) */

        } else

            return z;

#endif

}