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1 | /* -*-c-*- |
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2 | * |
3 | * Exponentiation operations for Barrett reduction |
4 | * |
5 | * (c) 2001 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_MPBARRETT_EXP_H |
29 | #define CATACOMB_MPBARRETT_EXP_H |
30 | |
31 | #ifdef __cplusplus |
32 | extern "C" { |
33 | #endif |
34 | |
35 | /*----- Exponentation definitions -----------------------------------------*/ |
36 | |
37 | #define EXP_TYPE mp * |
38 | |
39 | #define EXP_COPY(d, x) d = MP_COPY(x) |
40 | #define EXP_DROP(x) MP_DROP(x) |
41 | |
42 | #define EXP_MUL(a, x) do { \ |
43 | mp *t = mp_mul(spare, a, x); \ |
44 | spare = a; \ |
45 | a = mpbarrett_reduce(mb, t, t); \ |
46 | } while (0) |
47 | |
48 | #define EXP_SQR(a) do { \ |
49 | mp *t = mp_sqr(spare, a); \ |
50 | spare = a; \ |
51 | a = mpbarrett_reduce(mb, t, t); \ |
52 | } while (0) |
53 | |
34350998 |
54 | #define EXP_FIX(x) |
55 | |
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56 | #define EXP_SETMUL(d, x, y) do { \ |
57 | d = mp_mul(MP_NEW, x, y); \ |
58 | d = mpbarrett_reduce(mb, d, d); \ |
59 | } while (0) |
60 | |
61 | #define EXP_SETSQR(d, x) do { \ |
62 | d = mp_sqr(MP_NEW, x); \ |
63 | d = mpbarrett_reduce(mb, d, d); \ |
64 | } while (0) |
65 | |
66 | #include "exp.h" |
67 | |
68 | /*----- That's all, folks -------------------------------------------------*/ |
69 | |
70 | #ifdef __cplusplus |
71 | } |
72 | #endif |
73 | |
74 | #endif |