3 * Exponentiation operations for Barrett reduction
5 * (c) 2001 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
15 * License, or (at your option) any later version.
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.
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,
28 #ifndef CATACOMB_MPBARRETT_EXP_H
29 #define CATACOMB_MPBARRETT_EXP_H
35 /*----- Exponentation 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 = mp_mul(spare, a, x); \
45 a = mpbarrett_reduce(mb, t, t); \
48 #define EXP_SQR(a) do { \
49 mp *t = mp_sqr(spare, a); \
51 a = mpbarrett_reduce(mb, t, t); \
56 #define EXP_SETMUL(d, x, y) do { \
57 d = mp_mul(MP_NEW, x, y); \
58 d = mpbarrett_reduce(mb, d, d); \
61 #define EXP_SETSQR(d, x) do { \
62 d = mp_sqr(MP_NEW, x); \
63 d = mpbarrett_reduce(mb, d, d); \
68 /*----- That's all, folks -------------------------------------------------*/