xref: /illumos-gate/usr/src/lib/libm/common/m9x/nanl.c (revision a6bde1a23b60f140c7ed78df979c2e22b1ed9b2c)
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 #if defined(ELFOBJ)
31 #pragma weak nanl = __nanl
32 #endif
33 
34 #include "libm.h"
35 
36 #if defined(__sparc)
37 
38 static const union {
39 	unsigned i[4];
40 	long double ld;
41 } __nanl_union = { 0x7fffffff, 0xffffffff, 0xffffffff, 0xffffffff };
42 
43 #elif defined(__x86)
44 
45 static const union {
46 	unsigned i[3];
47 	long double ld;
48 } __nanl_union = { 0xffffffff, 0xffffffff, 0x7fff };
49 
50 #else
51 #error Unknown architecture
52 #endif
53 
54 /* ARGSUSED0 */
55 long double
56 __nanl(const char *c) {
57 	return (__nanl_union.ld);
58 }
59