xref: /titanic_41/usr/src/lib/libc/amd64/fp/fpsetsticky.c (revision da2e3ebdc1edfbc5028edf1354e7dd2fa69a7968)
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 2004 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 #include <ieeefp.h>
30 #include "synonyms.h"
31 
32 #pragma weak fpsetsticky = _fpsetsticky
33 
34 extern void _getsw(int *), _putsw(int), _getmxcsr(int *), _putmxcsr(int);
35 
36 fp_except
37 _fpsetsticky(fp_except s) {
38 	int sw, mxcsr;
39 
40 	_getsw(&sw);
41 	_putsw((int)s);
42 	_getmxcsr(&mxcsr);
43 	sw |= mxcsr;
44 	mxcsr = (mxcsr & ~0x3f) | ((int)s & 0x3f);
45 	_putmxcsr(mxcsr);
46 	return ((fp_except)(sw & 0x3f));
47 }
48