xref: /illumos-gate/usr/src/lib/libc/port/fp/ieee_globals.c (revision 20a7641f9918de8574b8b3b47dbe35c4bfc78df1)
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 2008 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*
28  * Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T
29  * All Rights Reserved
30  *
31  * Portions of this source code were derived from Berkeley
32  * 4.3 BSD under license from the regents of the University of
33  * California.
34  */
35 
36 /*
37  * contains definitions for variables for IEEE floating-point arithmetic
38  * modes; IEEE floating-point arithmetic exception handling;
39  */
40 
41 #include "lint.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 _thrp_get_nan_written()
63 {
64 	return (thr_main() ? &__nan_written : &fpvars->__nan_written);
65 }
66 
67 int *
68 _thrp_get_nan_read()
69 {
70 	return (thr_main() ? &__nan_read : &fpvars->__nan_read);
71 }
72 
73 int *
74 _thrp_get_inf_written()
75 {
76 	return (thr_main() ? &__inf_written : &fpvars->__inf_written);
77 }
78 
79 int *
80 _thrp_get_inf_read()
81 {
82 	return (thr_main() ? &__inf_read : &fpvars->__inf_read);
83 }
84