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58 lines
1.9 KiB
C
58 lines
1.9 KiB
C
/* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program 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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
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#include <my_global.h>
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#include <my_sys.h>
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#include <zlib.h>
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#if !defined(HAVE_CRC32_VPMSUM)
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/* TODO: remove this once zlib adds inherent support for hardware accelerated
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crc32 for all architectures. */
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static unsigned int my_crc32_zlib(unsigned int crc, const void *data,
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size_t len)
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{
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return (unsigned int) crc32(crc, data, (unsigned int) len);
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}
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my_crc32_t my_checksum= my_crc32_zlib;
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#endif
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#if __GNUC__ >= 4 && defined(__x86_64__)
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extern int crc32_pclmul_enabled();
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extern unsigned int crc32_pclmul(unsigned int, const void *, size_t);
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/*----------------------------- x86_64 ---------------------------------*/
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void my_checksum_init(void)
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{
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if (crc32_pclmul_enabled())
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my_checksum= crc32_pclmul;
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}
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#elif defined(__GNUC__) && defined(HAVE_ARMV8_CRC)
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/*----------------------------- aarch64 --------------------------------*/
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extern unsigned int crc32_aarch64(unsigned int, const void *, size_t);
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/* Ideally all ARM 64 bit processor should support crc32 but if some model
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doesn't support better to find it out through auxillary vector. */
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void my_checksum_init(void)
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{
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if (crc32_aarch64_available())
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my_checksum= crc32_aarch64;
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}
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#else
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void my_checksum_init(void) {}
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#endif
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