ipiq: Add simple IPI latency measure sysctls (2)
[dragonfly.git] / lib / libm / src / s_isnan.c
CommitLineData
b34b60bc 1/*-
6ff43c94 2 * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
1a3b704c 3 * All rights reserved.
b34b60bc
JS
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
1a3b704c 25 *
6ff43c94 26 * $FreeBSD: head/lib/msun/src/s_isnan.c 242879 2012-11-10 21:22:10Z dim $
b34b60bc
JS
27 */
28
29#include <math.h>
b34b60bc 30
6ff43c94
PA
31#include "fpmath.h"
32
33/* Provided by libc.so */
34#ifndef PIC
35#undef isnan
36int
37isnan(double d)
38{
39 union IEEEd2bits u;
40
41 u.d = d;
42 return (u.bits.exp == 2047 && (u.bits.manl != 0 || u.bits.manh != 0));
43}
44#endif /* !PIC */
45
46int
47__isnanf(float f)
b34b60bc 48{
6ff43c94 49 union IEEEf2bits u;
b34b60bc 50
6ff43c94
PA
51 u.f = f;
52 return (u.bits.exp == 255 && u.bits.man != 0);
b34b60bc 53}
6ff43c94
PA
54
55int
56__isnanl(long double e)
57{
58 union IEEEl2bits u;
59
60 u.e = e;
61 mask_nbit_l(u);
62 return (u.bits.exp == 32767 && (u.bits.manl != 0 || u.bits.manh != 0));
63}
64
65__weak_reference(__isnanf, isnanf);