3 * $Id: gfreduce-exp.h,v 1.2 2004/03/21 22:52:06 mdw Exp $
5 * Exponentiation operations for binary field reduction
7 * (c) 2004 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of Catacomb.
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.
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.
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,
30 /*----- Revision history --------------------------------------------------*
32 * $Log: gfreduce-exp.h,v $
33 * Revision 1.2 2004/03/21 22:52:06 mdw
34 * Merge and close elliptic curve branch.
36 * Revision 1.1.2.1 2004/03/21 22:39:46 mdw
37 * Elliptic curves on binary fields work.
41 #ifndef CATACOMB_GFREDUCE_EXP_H
42 #define CATACOMB_GFREDUCE_EXP_H
48 /*----- Exponentiation definitions ----------------------------------------*/
52 #define EXP_COPY(d, x) d = MP_COPY(x)
53 #define EXP_DROP(x) MP_DROP(x)
55 #define EXP_MUL(a, x) do { \
56 mp *t = gf_mul(spare, a, x); \
58 a = gfreduce_do(gr, t, t); \
61 #define EXP_SQR(a) do { \
62 mp *t = gf_sqr(spare, a); \
64 a = gfreduce_do(gr, t, t); \
69 #define EXP_SETMUL(d, x, y) do { \
70 d = gf_mul(MP_NEW, x, y); \
71 d = gfreduce_do(gr, d, d); \
74 #define EXP_SETSQR(d, x) do { \
75 d = gf_sqr(MP_NEW, x); \
76 d = gfreduce_do(gr, d, d); \
81 /*----- That's all, folks -------------------------------------------------*/