3 * Exponentiation operations for binary field reduction
5 * (c) 2004 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of Catacomb.
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
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17 * Catacomb is distributed in the hope that it will be useful,
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19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU Library General Public License for more details.
22 * You should have received a copy of the GNU Library General Public
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24 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
28 #ifndef CATACOMB_GFREDUCE_EXP_H
29 #define CATACOMB_GFREDUCE_EXP_H
35 /*----- Exponentiation definitions ----------------------------------------*/
39 #define EXP_COPY(d, x) d = MP_COPY(x)
40 #define EXP_DROP(x) MP_DROP(x)
42 #define EXP_MUL(a, x) do { \
43 mp *t = gf_mul(spare, a, x); \
45 a = gfreduce_do(gr, t, t); \
48 #define EXP_SQR(a) do { \
49 mp *t = gf_sqr(spare, a); \
51 a = gfreduce_do(gr, t, t); \
56 #define EXP_SETMUL(d, x, y) do { \
57 d = gf_mul(MP_NEW, x, y); \
58 d = gfreduce_do(gr, d, d); \
61 #define EXP_SETSQR(d, x) do { \
62 d = gf_sqr(MP_NEW, x); \
63 d = gfreduce_do(gr, d, d); \
68 /*----- That's all, folks -------------------------------------------------*/