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1 | /* -*-c-*- |
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2 | * |
3 | * Bit operations by truth table |
4 | * |
5 | * (c) 2002 Straylight/Edgeware |
6 | */ |
7 | |
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8 | /*----- Licensing notice --------------------------------------------------* |
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9 | * |
10 | * This file is part of Catacomb. |
11 | * |
12 | * Catacomb is free software; you can redistribute it and/or modify |
13 | * it under the terms of the GNU Library General Public License as |
14 | * published by the Free Software Foundation; either version 2 of the |
15 | * License, or (at your option) any later version. |
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16 | * |
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17 | * Catacomb is distributed in the hope that it will be useful, |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
20 | * GNU Library General Public License for more details. |
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21 | * |
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22 | * You should have received a copy of the GNU Library General Public |
23 | * License along with Catacomb; if not, write to the Free |
24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
25 | * MA 02111-1307, USA. |
26 | */ |
27 | |
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28 | #ifndef CATACOMB_BITOPS_H |
29 | #define CATACOMB_BITOPS_H |
30 | |
31 | #ifdef __cplusplus |
32 | extern "C" { |
33 | #endif |
34 | |
35 | /*----- Macros ------------------------------------------------------------*/ |
36 | |
37 | #define B0000(x, y) (0u) |
38 | #define B0001(x, y) ((x) & (y)) |
39 | #define B0010(x, y) ((x) & ~(y)) |
40 | #define B0011(x, y) (x) |
41 | #define B0100(x, y) (~(x) & (y)) |
42 | #define B0101(x, y) (y) |
43 | #define B0110(x, y) ((x) ^ (y)) |
44 | #define B0111(x, y) ((x) | (y)) |
45 | #define B1000(x, y) (~((x) | (y))) |
46 | #define B1001(x, y) (~((x) ^ (y))) |
47 | #define B1010(x, y) (~(y)) |
48 | #define B1011(x, y) ((x) | ~(y)) |
49 | #define B1100(x, y) (~(x)) |
50 | #define B1101(x, y) (~(x) | (y)) |
51 | #define B1110(x, y) (~((x) & (y))) |
52 | #define B1111(x, y) (~0u) |
53 | |
54 | /*----- That's all, folks -------------------------------------------------*/ |
55 | |
56 | #ifdef __cplusplus |
57 | } |
58 | #endif |
59 | |
60 | #endif |