chiark / gitweb /
math/group-parse.c (group-parse): Parse binary-group descriptions.
[catacomb] / math / gfreduce-exp.h
1 /* -*-c-*-
2  *
3  * Exponentiation operations for binary field reduction
4  *
5  * (c) 2004 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_GFREDUCE_EXP_H
29 #define CATACOMB_GFREDUCE_EXP_H
30
31 #ifdef __cplusplus
32   extern "C" {
33 #endif
34
35 /*----- Exponentiation 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 = gf_mul(spare, a, x);                                          \
44   spare = a;                                                            \
45   a = gfreduce_do(gr, t, t);                                            \
46 } while (0)
47
48 #define EXP_SQR(a) do {                                                 \
49   mp *t = gf_sqr(spare, a);                                             \
50   spare = a;                                                            \
51   a = gfreduce_do(gr, t, t);                                            \
52 } while (0)
53
54 #define EXP_FIX(x)
55
56 #define EXP_SETMUL(d, x, y) do {                                        \
57   d = gf_mul(MP_NEW, x, y);                                             \
58   d = gfreduce_do(gr, d, d);                                            \
59 } while (0)
60
61 #define EXP_SETSQR(d, x) do {                                           \
62   d = gf_sqr(MP_NEW, x);                                                \
63   d = gfreduce_do(gr, 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