1 /* $NetBSD: isnanl_ieee754.c,v 1.7 2013/11/21 14:14:13 martin Exp $ */
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * from: Header: isinf.c,v 1.1 91/07/08 19:03:34 torek Exp
38 #include <sys/cdefs.h>
39 #if defined(LIBC_SCCS) && !defined(lint)
41 static char sccsid
[] = "@(#)isinf.c 8.1 (Berkeley) 6/4/93";
43 __RCSID("$NetBSD: isnanl_ieee754.c,v 1.7 2013/11/21 14:14:13 martin Exp $");
45 #endif /* LIBC_SCCS and not lint */
47 #include <machine/ieee.h>
50 #ifdef __HAVE_LONG_DOUBLE
52 * 7.12.3.4 isnan - test for a NaN
53 * IEEE 754 compatible 128-bit extended-precision version
56 __isnanl(long double x
)
62 return u
.extu_ext
.ext_exp
== EXT_EXP_INFNAN
63 && (u
.extu_ext
.ext_frach
!= 0
65 || u
.extu_ext
.ext_frachm
!= 0
68 || u
.extu_ext
.ext_fraclm
!= 0
70 || u
.extu_ext
.ext_fracl
!= 0);
72 #endif /* __HAVE_LONG_DOUBLE */