49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
|
/* w_atan2f.c -- float version of w_atan2.c.
|
||
|
|
* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ====================================================
|
||
|
|
* 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.
|
||
|
|
* ====================================================
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <sys/cdefs.h>
|
||
|
|
#if defined(LIBM_SCCS) && !defined(lint)
|
||
|
|
__RCSID("$NetBSD: w_atan2f.c,v 1.7 2007/08/10 21:20:36 drochner Exp $");
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*
|
||
|
|
* wrapper atan2f(y,x)
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "namespace.h"
|
||
|
|
#include "math.h"
|
||
|
|
#include "math_private.h"
|
||
|
|
|
||
|
|
#ifdef __weak_alias
|
||
|
|
__weak_alias(atan2f, _atan2f)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
float
|
||
|
|
atan2f(float y, float x) /* wrapper atan2f */
|
||
|
|
{
|
||
|
|
#ifdef _IEEE_LIBM
|
||
|
|
return __ieee754_atan2f(y,x);
|
||
|
|
#else
|
||
|
|
float z;
|
||
|
|
z = __ieee754_atan2f(y,x);
|
||
|
|
if(_LIB_VERSION == _IEEE_||isnanf(x)||isnanf(y)) return z;
|
||
|
|
if(x==(float)0.0&&y==(float)0.0) {
|
||
|
|
/* atan2f(+-0,+-0) */
|
||
|
|
return (float)__kernel_standard((double)y,(double)x,103);
|
||
|
|
} else
|
||
|
|
return z;
|
||
|
|
#endif
|
||
|
|
}
|