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 __isnanl = isnanl
31
32 #include "libm.h"
33
34 #if defined(__sparc)
35 int
isnanl(long double x)36 isnanl(long double x) {
37 int *px = (int *) &x;
38 return ((px[0] & ~0x80000000) >= 0x7fff0000 &&
39 ((px[0] & ~0xffff0000) | px[1] | px[2] | px[3]) != 0);
40 }
41 #elif defined(__x86)
42 int
isnanl(long double x)43 isnanl(long double x) {
44 int *px = (int *) &x, t = px[2] & 0x7fff;
45 #if defined(HANDLE_UNSUPPORTED)
46 return (t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0 ||
47 t != 0 && (px[1] & 0x80000000) == 0);
48 #else
49 return (t == 0x7fff && ((px[1] & ~0x80000000) | px[0]) != 0);
50 #endif
51 }
52 #endif /* defined(__sparc) || defined(__x86) */
53