/* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
/* @(#)w_atan2.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[] = "$Id: w_atan2.c,v 1.4 1994/08/10 20:33:38 jtc Exp $";
#endif
/*
* wrapper atan2(y,x)
*/
#include "math.h"
#include "math_private.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
}