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/******************************************************************************
*
* Copyright 2006-2015 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License. *
******************************************************************************/
/*******************************************************************************
*
* This file contains simple pairing algorithms
*
******************************************************************************/
#pragma once
#include <cstdint>
#define DWORD_BITS 32
#define DWORD_BYTES 4
#define DWORD_BITS_SHIFT 5
#define KEY_LENGTH_DWORDS_P256 8
/* Arithmetic Operations */
int multiprecision_compare(uint32_t* a, uint32_t* b);
int multiprecision_iszero(uint32_t* a);
void multiprecision_init(uint32_t* c);
void multiprecision_copy(uint32_t* c, uint32_t* a);
uint32_t multiprecision_dword_bits(uint32_t a);
uint32_t multiprecision_most_signdwords(uint32_t* a);
uint32_t multiprecision_most_signbits(uint32_t* a);
void multiprecision_inv_mod(uint32_t* aminus, uint32_t* a);
uint32_t multiprecision_add(uint32_t* c, uint32_t* a, uint32_t* b); // c=a+b
void multiprecision_add_mod(uint32_t* c, uint32_t* a, uint32_t* b);
uint32_t multiprecision_sub(uint32_t* c, uint32_t* a, uint32_t* b); // c=a-b
void multiprecision_sub_mod(uint32_t* c, uint32_t* a, uint32_t* b);
void multiprecision_rshift(uint32_t* c, uint32_t* a); // c=a>>1, return carrier
void multiprecision_lshift_mod(uint32_t* c,
uint32_t* a); // c=a<<b, return carrier
uint32_t multiprecision_lshift(uint32_t* c,
uint32_t* a); // c=a<<b, return carrier
void multiprecision_mult(uint32_t* c, uint32_t* a, uint32_t* b); // c=a*b
void multiprecision_mersenns_mult_mod(uint32_t* c, uint32_t* a, uint32_t* b);
void multiprecision_mersenns_squa_mod(uint32_t* c, uint32_t* a);
uint32_t multiprecision_lshift(uint32_t* c, uint32_t* a);
void multiprecision_mult(uint32_t* c, uint32_t* a, uint32_t* b);
void multiprecision_fast_mod(uint32_t* c, uint32_t* a);
void multiprecision_fast_mod_P256(uint32_t* c, uint32_t* a);
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