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c3299d7dab
Based on: "Fast CRC Computation for Generic Polynomials Using PCLMULQDQ Instruction" V. Gopal, E. Ozturk, et al., 2009, http://intel.ly/2ySEwL0 Signed-off-by: Frank Du <frank.du@intel.com> Closes GH-6018
53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/*
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+----------------------------------------------------------------------+
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| Copyright (c) The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| https://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Author: Frank Du <frank.du@intel.com> |
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+----------------------------------------------------------------------+
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*/
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#ifndef _CRC32_X86_HEADER_H_
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#define _CRC32_X86_HEADER_H_
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#include "php.h"
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typedef enum {
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/* polynomial: 0x04C11DB7, used by bzip */
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X86_CRC32 = 0,
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/*
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polynomial: 0x04C11DB7 with reversed ordering,
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used by ethernet (IEEE 802.3), gzip, zip, png, etc
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*/
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X86_CRC32B,
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/*
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polynomial: 0x1EDC6F41 with reversed ordering,
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used by iSCSI, SCTP, Btrfs, ext4, etc
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*/
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X86_CRC32C,
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X86_CRC32_MAX,
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} X86_CRC32_TYPE;
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#if ZEND_INTRIN_SSE4_2_PCLMUL_FUNC_PTR
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PHP_MINIT_FUNCTION(crc32_x86_intrin);
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#endif
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#if ZEND_INTRIN_SSE4_2_PCLMUL_NATIVE || ZEND_INTRIN_SSE4_2_PCLMUL_RESOLVER
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/* Return the size processed by SIMD routine */
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size_t crc32_x86_simd_update(X86_CRC32_TYPE type, uint32_t *crc, const unsigned char *p, size_t nr);
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#else
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static inline size_t crc32_x86_simd_update(X86_CRC32_TYPE type, uint32_t *crc, const unsigned char *p, size_t nr)
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{
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return 0;
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}
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#endif
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#endif
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