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/*
* 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 __ARCH_REF64_ARCH_INTRINSICS_H__
# define __ARCH_REF64_ARCH_INTRINSICS_H__
# define ARCH_WORD_BITS 64
static __inline__ __attribute((always_inline, unused))
uint64_t word_is_zero(uint64_t a)
{
/* let's hope the compiler isn't clever enough to optimize this. */
return (((__uint128_t) a) - 1) >> 64;
}
static __inline__ __attribute((always_inline, unused))
__uint128_t widemul(uint64_t a, uint64_t b)
{
return ((__uint128_t) a) * b;
}
#endif /* ARCH_REF64_ARCH_INTRINSICS_H__ */
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