xref: /illumos-gate/usr/src/lib/libm/common/m9x/feprec.c (revision 9e573dcc)
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 (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
24  */
25 /*
26  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
27  * Use is subject to license terms.
28  */
29 
30 #pragma weak fegetprec = __fegetprec
31 #pragma weak fesetprec = __fesetprec
32 
33 #include "fenv_synonyms.h"
34 #include <fenv.h>
35 #include <ucontext.h>
36 #include <thread.h>
37 #include "fex_handler.h"
38 
39 int fegetprec(void)
40 {
41 	unsigned long	fsr;
42 
43 	__fenv_getfsr(&fsr);
44 	return __fenv_get_rp(fsr);
45 }
46 
47 int fesetprec(int r)
48 {
49 	unsigned long	fsr;
50 
51 	if (r != FE_FLTPREC && r != FE_DBLPREC && r != FE_LDBLPREC)
52 		return 0;
53 	__fenv_getfsr(&fsr);
54 	__fenv_set_rp(fsr, r);
55 	__fenv_setfsr(&fsr);
56 	return 1;
57 }
58