1 /**********************************************************************
2 * Copyright (c) 2013, 2014 Pieter Wuille *
3 * Distributed under the MIT software license, see the accompanying *
4 * file COPYING or http://www.opensource.org/licenses/mit-license.php.*
5 **********************************************************************/
7 #ifndef _SECP256K1_FIELD_REPR_
8 #define _SECP256K1_FIELD_REPR_
13 /* X = sum(i=0..9, elem[i]*2^26) mod n */
21 /* Unpacks a constant into a overlapping multi-limbed FE element. */
22 #define SECP256K1_FE_CONST_INNER(d7, d6, d5, d4, d3, d2, d1, d0) { \
24 (((uint32_t)d0) >> 26) | ((uint32_t)(d1) & 0xFFFFFUL) << 6, \
25 (((uint32_t)d1) >> 20) | ((uint32_t)(d2) & 0x3FFFUL) << 12, \
26 (((uint32_t)d2) >> 14) | ((uint32_t)(d3) & 0xFFUL) << 18, \
27 (((uint32_t)d3) >> 8) | ((uint32_t)(d4) & 0x3UL) << 24, \
28 (((uint32_t)d4) >> 2) & 0x3FFFFFFUL, \
29 (((uint32_t)d4) >> 28) | ((uint32_t)(d5) & 0x3FFFFFUL) << 4, \
30 (((uint32_t)d5) >> 22) | ((uint32_t)(d6) & 0xFFFFUL) << 10, \
31 (((uint32_t)d6) >> 16) | ((uint32_t)(d7) & 0x3FFUL) << 16, \
32 (((uint32_t)d7) >> 10) \
36 #define SECP256K1_FE_CONST(d7, d6, d5, d4, d3, d2, d1, d0) {SECP256K1_FE_CONST_INNER((d7), (d6), (d5), (d4), (d3), (d2), (d1), (d0)), 1, 1}
38 #define SECP256K1_FE_CONST(d7, d6, d5, d4, d3, d2, d1, d0) {SECP256K1_FE_CONST_INNER((d7), (d6), (d5), (d4), (d3), (d2), (d1), (d0))}
43 } secp256k1_fe_storage_t;
45 #define SECP256K1_FE_STORAGE_CONST(d7, d6, d5, d4, d3, d2, d1, d0) {{ (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }}
46 #define SECP256K1_FE_STORAGE_CONST_GET(d) d.n[7], d.n[6], d.n[5], d.n[4],d.n[3], d.n[2], d.n[1], d.n[0]