61 lines
1.4 KiB
C++
61 lines
1.4 KiB
C++
/*
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* Copyright (C) 2018 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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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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