git / moonbite-core / src/crc32c/src/crc32c_sse42.h · raw

// Copyright 2017 The CRC32C Authors. All rights reserved.// Use of this source code is governed by a BSD-style license that can be// found in the LICENSE file. See the AUTHORS file for names of contributors.#ifndef CRC32C_CRC32C_SSE42_H_#define CRC32C_CRC32C_SSE42_H_// X86-specific code.#include <cstddef>#include <cstdint>#ifdef CRC32C_HAVE_CONFIG_H#include "crc32c/crc32c_config.h"#endif// The hardware-accelerated implementation is only enabled for 64-bit builds,// because a straightforward 32-bit implementation actually runs slower than the// portable version. Most X86 machines are 64-bit nowadays, so it doesn't make// much sense to spend time building an optimized hardware-accelerated// implementation.#if HAVE_SSE42 && (defined(_M_X64) || defined(__x86_64__))namespace crc32c {// SSE4.2-accelerated implementation in crc32c_sse42.ccuint32_t ExtendSse42(uint32_t crc, const uint8_t* data, size_t count);}  // namespace crc32c#endif  // HAVE_SSE42 && (defined(_M_X64) || defined(__x86_64__))#endif  // CRC32C_CRC32C_SSE42_H_