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field.h
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1/***********************************************************************
2 * Copyright (c) 2013, 2014 Pieter Wuille *
3 * Distributed under the MIT software license, see the accompanying *
4 * file COPYING or https://www.opensource.org/licenses/mit-license.php.*
5 ***********************************************************************/
6
7#ifndef SECP256K1_FIELD_H
8#define SECP256K1_FIELD_H
9
20
21#include "util.h"
22
23#if defined(SECP256K1_WIDEMUL_INT128)
24#include "field_5x52.h"
25#elif defined(SECP256K1_WIDEMUL_INT64)
26#include "field_10x26.h"
27#else
28#error "Please select wide multiplication implementation"
29#endif
30
31static const secp256k1_fe secp256k1_fe_one = SECP256K1_FE_CONST(0, 0, 0, 0, 0, 0, 0, 1);
32static const secp256k1_fe secp256k1_const_beta = SECP256K1_FE_CONST(
33 0x7ae96a2bul, 0x657c0710ul, 0x6e64479eul, 0xac3434e9ul,
34 0x9cf04975ul, 0x12f58995ul, 0xc1396c28ul, 0x719501eeul
35);
36
40static void secp256k1_fe_normalize(secp256k1_fe *r);
41
43static void secp256k1_fe_normalize_weak(secp256k1_fe *r);
44
46static void secp256k1_fe_normalize_var(secp256k1_fe *r);
47
49static int secp256k1_fe_normalizes_to_zero(const secp256k1_fe *r);
50
53static int secp256k1_fe_normalizes_to_zero_var(const secp256k1_fe *r);
54
58static void secp256k1_fe_set_int(secp256k1_fe *r, int a);
59
61static void secp256k1_fe_clear(secp256k1_fe *a);
62
64static int secp256k1_fe_is_zero(const secp256k1_fe *a);
65
67static int secp256k1_fe_is_odd(const secp256k1_fe *a);
68
70static int secp256k1_fe_equal(const secp256k1_fe *a, const secp256k1_fe *b);
71
73static int secp256k1_fe_equal_var(const secp256k1_fe *a, const secp256k1_fe *b);
74
76static int secp256k1_fe_cmp_var(const secp256k1_fe *a, const secp256k1_fe *b);
77
79static int secp256k1_fe_set_b32(secp256k1_fe *r, const unsigned char *a);
80
82static void secp256k1_fe_get_b32(unsigned char *r, const secp256k1_fe *a);
83
86static void secp256k1_fe_negate(secp256k1_fe *r, const secp256k1_fe *a, int m);
87
90static void secp256k1_fe_mul_int(secp256k1_fe *r, int a);
91
93static void secp256k1_fe_add(secp256k1_fe *r, const secp256k1_fe *a);
94
97static void secp256k1_fe_mul(secp256k1_fe *r, const secp256k1_fe *a, const secp256k1_fe * SECP256K1_RESTRICT b);
98
101static void secp256k1_fe_sqr(secp256k1_fe *r, const secp256k1_fe *a);
102
108static int secp256k1_fe_sqrt(secp256k1_fe *r, const secp256k1_fe *a);
109
112static void secp256k1_fe_inv(secp256k1_fe *r, const secp256k1_fe *a);
113
115static void secp256k1_fe_inv_var(secp256k1_fe *r, const secp256k1_fe *a);
116
118static void secp256k1_fe_to_storage(secp256k1_fe_storage *r, const secp256k1_fe *a);
119
121static void secp256k1_fe_from_storage(secp256k1_fe *r, const secp256k1_fe_storage *a);
122
124static void secp256k1_fe_storage_cmov(secp256k1_fe_storage *r, const secp256k1_fe_storage *a, int flag);
125
127static void secp256k1_fe_cmov(secp256k1_fe *r, const secp256k1_fe *a, int flag);
128
132static void secp256k1_fe_half(secp256k1_fe *r);
133
136static void secp256k1_fe_get_bounds(secp256k1_fe *r, int m);
137
138#endif /* SECP256K1_FIELD_H */
#define SECP256K1_RESTRICT
Definition util.h:137
#define SECP256K1_FE_CONST(d7, d6, d5, d4, d3, d2, d1, d0)
Definition field_10x26.h:40
const GenericPointer< typename T::ValueType > T2 T::AllocatorType & a
Definition pointer.h:1124