fix off-by-1 screen title fill
[AROS.git] / compiler / mlib / s_isnan.c
blob71dfe636f7477f2cd5cdf0c0d54daa11c569ddd0
1 /*-
2 * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG>
3 * All rights reserved.
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.
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.
26 * $FreeBSD: src/lib/msun/src/s_isnan.c,v 1.8 2004/08/05 01:46:11 das Exp $
29 #include <aros/system.h>
30 #include <math.h>
32 #include "fpmath.h"
34 int
35 __isnan(double d)
37 union IEEEd2bits u;
39 u.d = d;
40 return (u.bits.exp == 2047 && (u.bits.manl != 0 || u.bits.manh != 0));
43 /* isnan is now a macro in math.h, but we need to keep a proper symbol around
44 * for anyone linking to us without recompiling with new headers */
45 AROS_MAKE_ALIAS(__isnan, isnan);
47 int
48 __isnanf(float f)
50 union IEEEf2bits u;
52 u.f = f;
53 return (u.bits.exp == 255 && u.bits.man != 0);
56 int
57 __isnanl(long double e)
59 union IEEEl2bits u;
61 u.e = e;
62 mask_nbit_l(u);
63 return (u.bits.exp == 32767 && (u.bits.manl != 0 || u.bits.manh != 0));