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 /*
28 * On SPARC V8, _Q_cplx_lr_div_rx(v, a, w) sets *v = *a / *w computed
29 * by the textbook formula without regard to exceptions or special
30 * cases.
31 *
32 * On SPARC V9, _Q_cplx_lr_div_rx(a, w) returns *a / *w.
33 *
34 * This code is intended to be used only when CX_LIMITED_RANGE is ON;
35 * otherwise use _Q_cplx_div_rx.
36 */
37
38 #if !defined(sparc) && !defined(__sparc)
39 #error This code is for SPARC only
40 #endif
41
42 #ifdef __sparcv9
43 long double _Complex
_Q_cplx_lr_div_rx(const long double * pa,const long double _Complex * w)44 _Q_cplx_lr_div_rx(const long double *pa, const long double _Complex *w)
45 {
46 long double _Complex v = 0;
47 #else
48 void
49 _Q_cplx_lr_div_rx(long double _Complex *v, const long double *pa,
50 const long double _Complex *w)
51 {
52 #endif
53 long double a, c, d;
54
55 a = *pa;
56 c = ((long double *)w)[0];
57 d = ((long double *)w)[1];
58
59 a /= (c * c + d * d);
60
61 #ifdef __sparcv9
62 ((long double *)&v)[0] = a * c;
63 ((long double *)&v)[1] = a * -d;
64 return (v);
65 #else
66 ((long double *)v)[0] = a * c;
67 ((long double *)v)[1] = a * -d;
68 #endif
69 }
70