openssl/crypto/ec/curve448/arch_64/arch_intrinsics.h
Amitay Isaacs f684a2d783 curve448: Use constant time zero check function
Signed-off-by: Amitay Isaacs <amitay@ozlabs.org>

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/14784)
2021-04-08 12:18:10 +01:00

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C

/*
* Copyright 2017-2018 The OpenSSL Project Authors. All Rights Reserved.
* Copyright 2016 Cryptography Research, Inc.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*
* Originally written by Mike Hamburg
*/
#ifndef OSSL_CRYPTO_EC_CURVE448_ARCH_64_INTRINSICS_H
# define OSSL_CRYPTO_EC_CURVE448_ARCH_64_INTRINSICS_H
# include "internal/constant_time.h"
# define ARCH_WORD_BITS 64
# define word_is_zero(a) constant_time_is_zero_64(a)
static ossl_inline uint128_t widemul(uint64_t a, uint64_t b)
{
return ((uint128_t) a) * b;
}
#endif /* OSSL_CRYPTO_EC_CURVE448_ARCH_64_INTRINSICS_H */