vx32

Local 9vx git repository for patches.
git clone git://r-36.net/vx32
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w_atan2.c (934B)

      1 /* @(#)w_atan2.c 5.1 93/09/24 */
      2 /*
      3  * ====================================================
      4  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
      5  *
      6  * Developed at SunPro, a Sun Microsystems, Inc. business.
      7  * Permission to use, copy, modify, and distribute this
      8  * software is freely granted, provided that this notice
      9  * is preserved.
     10  * ====================================================
     11  */
     12 
     13 #ifndef lint
     14 static char rcsid[] = "$FreeBSD: src/lib/msun/src/w_atan2.c,v 1.7 2002/05/28 18:15:04 alfred Exp $";
     15 #endif
     16 
     17 /*
     18  * wrapper atan2(y,x)
     19  */
     20 
     21 #include "math.h"
     22 #include "math_private.h"
     23 
     24 
     25 double
     26 atan2(double y, double x)	/* wrapper atan2 */
     27 {
     28 #ifdef _IEEE_LIBM
     29 	return __ieee754_atan2(y,x);
     30 #else
     31 	double z;
     32 	z = __ieee754_atan2(y,x);
     33 	if(_LIB_VERSION == _IEEE_||isnan(x)||isnan(y)) return z;
     34 	if(x==0.0&&y==0.0) {
     35 	        return __kernel_standard(y,x,3); /* atan2(+-0,+-0) */
     36 	} else
     37 	    return z;
     38 #endif
     39 }