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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
*/
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma weak __carg = carg
#include <math.h> /* atan2 */
#include "complex_wrapper.h"
static const double
pi = 3.14159265358979311600e+00,
pi_lo = 1.22464679914735320717e-16;
double
carg(dcomplex z) {
int ix, iy;
ix = ((int *)&(D_RE(z)))[HIWORD];
iy = ((int *)&(D_IM(z)))[HIWORD];
if ((((ix | iy) & ~0x80000000) | ((int *)&(D_RE(z)))[LOWORD] |
((int *)&(D_IM(z)))[LOWORD]) == 0) {
/* x and y are both zero */
if (ix == 0)
return (D_IM(z));
return ((iy == 0)? pi + pi_lo : -pi - pi_lo);
}
return (atan2(D_IM(z), D_RE(z)));
}
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