1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27#pragma ident	"%Z%%M%	%I%	%E% SMI"
28
29/*
30 * On SPARC V8, _Q_cplx_lr_mul(v, z, w) sets *v = *z * *w computed by
31 * the textbook formula without regard to exceptions or special cases.
32 *
33 * On SPARC V9, _Q_cplx_lr_mul(z, w) returns *z * *w.
34 *
35 * This code is intended to be used only when CX_LIMITED_RANGE is ON;
36 * otherwise use _Q_cplx_mul.
37 */
38
39#if !defined(sparc) && !defined(__sparc)
40#error This code is for SPARC only
41#endif
42
43#ifdef __sparcv9
44long double _Complex
45_Q_cplx_lr_mul(const long double _Complex *z, const long double _Complex *w)
46{
47	long double _Complex	v;
48#else
49void
50_Q_cplx_lr_mul(long double _Complex *v, const long double _Complex *z,
51	const long double _Complex *w)
52{
53#endif
54	long double	a, b, c, d;
55
56	a = ((long double *)z)[0];
57	b = ((long double *)z)[1];
58	c = ((long double *)w)[0];
59	d = ((long double *)w)[1];
60
61#ifdef __sparcv9
62	((long double *)&v)[0] = (a * c - b * d);
63	((long double *)&v)[1] = (a * d + b * c);
64	return (v);
65#else
66	((long double *)v)[0] = (a * c - b * d);
67	((long double *)v)[1] = (a * d + b * c);
68#endif
69}
70