0,0 → 1,44 |
/* 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 |
} |