1*be0c75e8SJohn Marino /* $OpenBSD: signbit.c,v 1.7 2013/07/03 04:46:36 espie Exp $ */
2*be0c75e8SJohn Marino /*
3*be0c75e8SJohn Marino * Copyright (c) 2008 Martynas Venckus <martynas@openbsd.org>
4*be0c75e8SJohn Marino *
5*be0c75e8SJohn Marino * Permission to use, copy, modify, and distribute this software for any
6*be0c75e8SJohn Marino * purpose with or without fee is hereby granted, provided that the above
7*be0c75e8SJohn Marino * copyright notice and this permission notice appear in all copies.
8*be0c75e8SJohn Marino *
9*be0c75e8SJohn Marino * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10*be0c75e8SJohn Marino * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11*be0c75e8SJohn Marino * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12*be0c75e8SJohn Marino * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13*be0c75e8SJohn Marino * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14*be0c75e8SJohn Marino * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15*be0c75e8SJohn Marino * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16*be0c75e8SJohn Marino */
17*be0c75e8SJohn Marino
18*be0c75e8SJohn Marino #include <sys/types.h>
19*be0c75e8SJohn Marino #include <machine/ieee.h>
20*be0c75e8SJohn Marino #include <float.h>
21*be0c75e8SJohn Marino #include <math.h>
22*be0c75e8SJohn Marino
23*be0c75e8SJohn Marino int
__signbit(double d)24*be0c75e8SJohn Marino __signbit(double d)
25*be0c75e8SJohn Marino {
26*be0c75e8SJohn Marino struct ieee_double *p = (struct ieee_double *)&d;
27*be0c75e8SJohn Marino
28*be0c75e8SJohn Marino return p->dbl_sign;
29*be0c75e8SJohn Marino }
30*be0c75e8SJohn Marino
31*be0c75e8SJohn Marino int
__signbitf(float f)32*be0c75e8SJohn Marino __signbitf(float f)
33*be0c75e8SJohn Marino {
34*be0c75e8SJohn Marino struct ieee_single *p = (struct ieee_single *)&f;
35*be0c75e8SJohn Marino
36*be0c75e8SJohn Marino return p->sng_sign;
37*be0c75e8SJohn Marino }
38