xref: /illumos-gate/usr/src/lib/libc/port/fp/ieee_globals.c (revision 7c478bd95313f5f23a4c958a745db2134aa03244)
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  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  *
25  * Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T
26  * All Rights Reserved
27  *
28  * Portions of this source code were derived from Berkeley
29  * 4.3 BSD under license from the regents of the University of
30  * California.
31  */
32 
33 #pragma ident	"%Z%%M%	%I%	%E% SMI"
34 
35 /*
36  * contains definitions for variables for IEEE floating-point arithmetic
37  * modes; IEEE floating-point arithmetic exception handling;
38  */
39 
40 
41 #include "synonyms.h"
42 #include <thread.h>
43 #include <synch.h>
44 #include <mtlib.h>
45 #include "tsd.h"
46 
47 int __inf_read, __inf_written, __nan_read, __nan_written;
48 
49 /*
50  * Per-thread instances (thread-specific data) of the above globals.
51  */
52 typedef struct {
53 	int	__inf_read;
54 	int	__inf_written;
55 	int	__nan_read;
56 	int	__nan_written;
57 } fpvars_t;
58 
59 #define	fpvars	((fpvars_t *)tsdalloc(_T_FP_GET, sizeof (fpvars_t), NULL))
60 
61 int *
62 _thr_get_nan_written()
63 {
64 	return (_thr_main() ? &__nan_written : &fpvars->__nan_written);
65 }
66 
67 int *
68 _thr_get_nan_read()
69 {
70 	return (_thr_main() ? &__nan_read : &fpvars->__nan_read);
71 }
72 
73 int *
74 _thr_get_inf_written()
75 {
76 	return (_thr_main() ? &__inf_written : &fpvars->__inf_written);
77 }
78 
79 int *
80 _thr_get_inf_read()
81 {
82 	return (_thr_main() ? &__inf_read : &fpvars->__inf_read);
83 }
84