23 lines
626 B
C
23 lines
626 B
C
/* Copyright (c) 2016 Cryptography Research, Inc.
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* Released under the MIT License. See LICENSE.txt for license information.
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*/
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#ifndef __ARCH_REF64_ARCH_INTRINSICS_H__
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#define __ARCH_REF64_ARCH_INTRINSICS_H__
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#define ARCH_WORD_BITS 64
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static __inline__ __attribute((always_inline,unused))
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uint64_t word_is_zero(uint64_t a) {
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/* let's hope the compiler isn't clever enough to optimize this. */
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return (((__uint128_t)a)-1)>>64;
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}
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static __inline__ __attribute((always_inline,unused))
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__uint128_t widemul(uint64_t a, uint64_t b) {
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return ((__uint128_t)a) * b;
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}
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#endif /* ARCH_REF64_ARCH_INTRINSICS_H__ */
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