1be0c75e8SJohn Marino /* $OpenBSD: isnanl.c,v 1.2 2008/12/09 19:52:33 martynas Exp $ */
2be0c75e8SJohn Marino /*
3be0c75e8SJohn Marino * Copyright (c) 2008 Martynas Venckus <martynas@openbsd.org>
4be0c75e8SJohn Marino *
5be0c75e8SJohn Marino * Permission to use, copy, modify, and distribute this software for any
6be0c75e8SJohn Marino * purpose with or without fee is hereby granted, provided that the above
7be0c75e8SJohn Marino * copyright notice and this permission notice appear in all copies.
8be0c75e8SJohn Marino *
9be0c75e8SJohn Marino * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10be0c75e8SJohn Marino * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11be0c75e8SJohn Marino * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12be0c75e8SJohn Marino * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13be0c75e8SJohn Marino * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14be0c75e8SJohn Marino * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15be0c75e8SJohn Marino * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16be0c75e8SJohn Marino */
17be0c75e8SJohn Marino
18be0c75e8SJohn Marino #include <sys/types.h>
19be0c75e8SJohn Marino #include <machine/ieee.h>
20be0c75e8SJohn Marino #include <math.h>
21be0c75e8SJohn Marino
22be0c75e8SJohn Marino #pragma GCC diagnostic push
23be0c75e8SJohn Marino #pragma GCC diagnostic ignored "-Wmissing-prototypes"
24be0c75e8SJohn Marino
25*404c8a26SSascha Wildner __sym_compat(__isnanl, past___isnanl, DF306.0);
26be0c75e8SJohn Marino int
past___isnanl(long double e)27*404c8a26SSascha Wildner past___isnanl(long double e)
28be0c75e8SJohn Marino {
29be0c75e8SJohn Marino struct ieee_ext *p = (struct ieee_ext *)&e;
30be0c75e8SJohn Marino
31be0c75e8SJohn Marino p->ext_frach &= ~0x80000000; /* clear normalization bit */
32be0c75e8SJohn Marino
33be0c75e8SJohn Marino return (p->ext_exp == EXT_EXP_INFNAN &&
34be0c75e8SJohn Marino (p->ext_frach != 0 || p->ext_fracl != 0));
35be0c75e8SJohn Marino }
36be0c75e8SJohn Marino
37be0c75e8SJohn Marino #pragma GCC diagnostic pop
38