_D_cplx_lr_div.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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
* 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 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* _D_cplx_lr_div(z, w) returns z / w computed by the textbook
* formula without regard to exceptions or special cases.
*
* This code is intended to be used only when CX_LIMITED_RANGE is
* ON; otherwise use _D_cplx_div.
*/
#endif
double _Complex
_D_cplx_lr_div(double _Complex z, double _Complex w)
{
double _Complex v;
long double a, b, c, d, r;
/* LINTED alignment */
a = ((double *)&z)[0];
/* LINTED alignment */
b = ((double *)&z)[1];
/* LINTED alignment */
c = ((double *)&w)[0];
/* LINTED alignment */
d = ((double *)&w)[1];
r = 1.0f / (c * c + d * d);
/* LINTED alignment */
((double *)&v)[0] = (double)((a * c + b * d) * r);
/* LINTED alignment */
((double *)&v)[1] = (double)((b * c - a * d) * r);
return (v);
}