xref: /illumos-gate/usr/src/lib/libc/sparc/fp/_Q_neg.c (revision 657a8c206b913d1ee578fd725f0b25eca5b77253)
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 (c) 1994-1997, by Sun Microsystems, Inc.
24  * All rights reserved.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 #include "quad.h"
30 
31 #ifdef __sparcv9
32 
33 /*
34  * _Qp_neg(pz, x) sets *pz = -*x.
35  */
36 void
37 _Qp_neg(union longdouble *pz, const union longdouble *x)
38 
39 #else
40 
41 /*
42  * _Q_neg(x) returns -*x.
43  */
44 union longdouble
45 _Q_neg(const union longdouble *x)
46 
47 #endif /* __sparcv9 */
48 
49 {
50 #ifndef __sparcv9
51 	union	longdouble	z;
52 #endif
53 
54 	Z.l.msw = x->l.msw ^ 0x80000000;
55 	Z.l.frac2 = x->l.frac2;
56 	Z.l.frac3 = x->l.frac3;
57 	Z.l.frac4 = x->l.frac4;
58 	QUAD_RETURN(Z);
59 }
60