fcb8d040e8
Instead of lengthy blurbs, switch to single-line, machine-readable standardized (https://spdx.dev) license identifiers. The Linux kernel switched long ago, so there is strong precedent. Three cases are handled: AGPL-only, Apache-only, and dual licensed. For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0), reasoning that our changes are extensive enough to apply our license. The changes we applied mechanically with a script, except to licenses/README.md. Closes #9937
48 lines
831 B
C++
48 lines
831 B
C++
/*
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* Copyright (C) 2018-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*
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*/
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#pragma once
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#include <cstdint>
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#if defined(__x86_64__) || defined(__i386__)
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#include <wmmintrin.h>
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#include <smmintrin.h>
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// Performs a carry-less multiplication of two integers.
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inline
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uint64_t clmul_u32(uint32_t p1, uint32_t p2) {
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__m128i p = _mm_set_epi64x(p1, p2);
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p = _mm_clmulepi64_si128(p, p, 0x01);
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return _mm_extract_epi64(p, 0);
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}
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inline
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uint64_t clmul(uint32_t p1, uint32_t p2) {
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return clmul_u32(p1, p2);
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}
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#elif defined(__aarch64__)
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#include <arm_neon.h>
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// Performs a carry-less multiplication of two integers.
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inline
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uint64_t clmul_u32(uint32_t p1, uint32_t p2) {
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return vmull_p64(p1, p2);
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}
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inline
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uint64_t clmul(uint32_t p1, uint32_t p2) {
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return clmul_u32(p1, p2);
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}
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#endif
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