| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * Bit operations by truth table |
| 4 | * |
| 5 | * (c) 2002 Straylight/Edgeware |
| 6 | */ |
| 7 | |
| 8 | /*----- Licensing notice --------------------------------------------------* |
| 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. |
| 16 | * |
| 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. |
| 21 | * |
| 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 | |
| 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 |