1/* w_atan2f.c -- float version of w_atan2.c.
2 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
3 */
4
5/*
6 * ====================================================
7 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
8 *
9 * Developed at SunPro, a Sun Microsystems, Inc. business.
10 * Permission to use, copy, modify, and distribute this
11 * software is freely granted, provided that this notice
12 * is preserved.
13 * ====================================================
14 */
15
16#include <sys/cdefs.h>
17#if defined(LIBM_SCCS) && !defined(lint)
18__RCSID("$NetBSD: w_atan2f.c,v 1.6 2002/05/26 22:02:00 wiz Exp $");
19#endif
20
21/*
22 * wrapper atan2f(y,x)
23 */
24
25#include "namespace.h"
26#include "math.h"
27#include "math_private.h"
28
29#ifdef __weak_alias
30__weak_alias(atan2f, _atan2f)
31#endif
32
33float
34atan2f(float y, float x)		/* wrapper atan2f */
35{
36#ifdef _IEEE_LIBM
37	return __ieee754_atan2f(y,x);
38#else
39	float z;
40	z = __ieee754_atan2f(y,x);
41	if(_LIB_VERSION == _IEEE_||isnanf(x)||isnanf(y)) return z;
42	if(x==(float)0.0&&y==(float)0.0) {
43		/* atan2f(+-0,+-0) */
44	        return (float)__kernel_standard((double)y,(double)x,103);
45	} else
46	    return z;
47#endif
48}
49