3 * $Id: bitops.h,v 1.1 2002/10/19 17:56:50 mdw Exp $
5 * Bit operations by truth table
7 * (c) 2002 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
14 * Catacomb is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU Library General Public License as
16 * published by the Free Software Foundation; either version 2 of the
17 * License, or (at your option) any later version.
19 * Catacomb is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU Library General Public License for more details.
24 * You should have received a copy of the GNU Library General Public
25 * License along with Catacomb; if not, write to the Free
26 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 /*----- Revision history --------------------------------------------------*
33 * Revision 1.1 2002/10/19 17:56:50 mdw
34 * Fix bit operations. Test them (a bit) better.
38 #ifndef CATACOMB_BITOPS_H
39 #define CATACOMB_BITOPS_H
45 /*----- Macros ------------------------------------------------------------*/
47 #define B0000(x, y) (0u)
48 #define B0001(x, y) ((x) & (y))
49 #define B0010(x, y) ((x) & ~(y))
50 #define B0011(x, y) (x)
51 #define B0100(x, y) (~(x) & (y))
52 #define B0101(x, y) (y)
53 #define B0110(x, y) ((x) ^ (y))
54 #define B0111(x, y) ((x) | (y))
55 #define B1000(x, y) (~((x) | (y)))
56 #define B1001(x, y) (~((x) ^ (y)))
57 #define B1010(x, y) (~(y))
58 #define B1011(x, y) ((x) | ~(y))
59 #define B1100(x, y) (~(x))
60 #define B1101(x, y) (~(x) | (y))
61 #define B1110(x, y) (~((x) & (y)))
62 #define B1111(x, y) (~0u)
64 /*----- That's all, folks -------------------------------------------------*/