| 7d5fa32a |
1 | /* -*-c-*- |
| 2 | * |
| 3 | * $Id: mpx-kmac.h,v 1.1 2000/06/17 11:42:11 mdw Exp $ |
| 4 | * |
| 5 | * Macros for Karatsuba functions |
| 6 | * |
| 7 | * (c) 2000 Straylight/Edgeware |
| 8 | */ |
| 9 | |
| 10 | /*----- Licensing notice --------------------------------------------------* |
| 11 | * |
| 12 | * This file is part of Catacomb. |
| 13 | * |
| 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. |
| 18 | * |
| 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. |
| 23 | * |
| 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, |
| 27 | * MA 02111-1307, USA. |
| 28 | */ |
| 29 | |
| 30 | /*----- Revision history --------------------------------------------------* |
| 31 | * |
| 32 | * $Log: mpx-kmac.h,v $ |
| 33 | * Revision 1.1 2000/06/17 11:42:11 mdw |
| 34 | * Moved the Karatsuba macros into a separate file for better sharing. |
| 35 | * Fixed some comments. |
| 36 | * |
| 37 | */ |
| 38 | |
| 39 | #ifndef CATACOMB_MPX_KMAC_H |
| 40 | #define CATACOMB_MPX_KMAC_H |
| 41 | |
| 42 | #ifdef __cplusplus |
| 43 | extern "C" { |
| 44 | #endif |
| 45 | |
| 46 | /*----- Header files ------------------------------------------------------*/ |
| 47 | |
| 48 | #ifndef CATACOMB_MPW_H |
| 49 | # include "mpw.h" |
| 50 | #endif |
| 51 | |
| 52 | /*----- Macros provided ---------------------------------------------------*/ |
| 53 | |
| 54 | #define UADD(dv, av, avl) do { \ |
| 55 | mpw *_dv = (dv); \ |
| 56 | const mpw *_av = (av), *_avl = (avl); \ |
| 57 | mpw _c = 0; \ |
| 58 | \ |
| 59 | while (_av < _avl) { \ |
| 60 | mpw _a, _b; \ |
| 61 | mpd _x; \ |
| 62 | _a = *_av++; \ |
| 63 | _b = *_dv; \ |
| 64 | _x = (mpd)_a + (mpd)_b + _c; \ |
| 65 | *_dv++ = MPW(_x); \ |
| 66 | _c = _x >> MPW_BITS; \ |
| 67 | } \ |
| 68 | while (_c) { \ |
| 69 | mpd _x = (mpd)*_dv + (mpd)_c; \ |
| 70 | *_dv++ = MPW(_x); \ |
| 71 | _c = _x >> MPW_BITS; \ |
| 72 | } \ |
| 73 | } while (0) |
| 74 | |
| 75 | #define UADD2(dv, dvl, av, avl, bv, bvl) do { \ |
| 76 | mpw *_dv = (dv), *_dvl = (dvl); \ |
| 77 | const mpw *_av = (av), *_avl = (avl); \ |
| 78 | const mpw *_bv = (bv), *_bvl = (bvl); \ |
| 79 | mpw _c = 0; \ |
| 80 | \ |
| 81 | while (_av < _avl || _bv < _bvl) { \ |
| 82 | mpw _a, _b; \ |
| 83 | mpd _x; \ |
| 84 | _a = (_av < _avl) ? *_av++ : 0; \ |
| 85 | _b = (_bv < _bvl) ? *_bv++ : 0; \ |
| 86 | _x = (mpd)_a + (mpd)_b + _c; \ |
| 87 | *_dv++ = MPW(_x); \ |
| 88 | _c = _x >> MPW_BITS; \ |
| 89 | } \ |
| 90 | *_dv++ = _c; \ |
| 91 | while (_dv < _dvl) \ |
| 92 | *_dv++ = 0; \ |
| 93 | } while (0) |
| 94 | |
| 95 | #define USUB(dv, av, avl) do { \ |
| 96 | mpw *_dv = (dv); \ |
| 97 | const mpw *_av = (av), *_avl = (avl); \ |
| 98 | mpw _c = 0; \ |
| 99 | \ |
| 100 | while (_av < _avl) { \ |
| 101 | mpw _a, _b; \ |
| 102 | mpd _x; \ |
| 103 | _a = *_av++; \ |
| 104 | _b = *_dv; \ |
| 105 | _x = (mpd)_b - (mpd)_a - _c; \ |
| 106 | *_dv++ = MPW(_x); \ |
| 107 | if (_x >> MPW_BITS) \ |
| 108 | _c = 1; \ |
| 109 | else \ |
| 110 | _c = 0; \ |
| 111 | } \ |
| 112 | while (_c) { \ |
| 113 | mpd _x = (mpd)*_dv - (mpd)_c; \ |
| 114 | *_dv++ = MPW(_x); \ |
| 115 | if (_x >> MPW_BITS) \ |
| 116 | _c = 1; \ |
| 117 | else \ |
| 118 | _c = 0; \ |
| 119 | } \ |
| 120 | } while (0) |
| 121 | |
| 122 | /*----- That's all, folks -------------------------------------------------*/ |
| 123 | |
| 124 | #ifdef __cplusplus |
| 125 | } |
| 126 | #endif |
| 127 | |
| 128 | #endif |
projects / u / mdw / catacomb / blame