a23b8c8c0a
Implement spdk_crc32_update() with ARM CRC32 intrinsics. Change-Id: I6a64122f5dd3b804408cfae61a205e78fd8c4547 Signed-off-by: Richael Zhuang <richael.zhuang@arm.com> Reviewed-on: https://review.gerrithub.io/c/440828 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com>
95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright (c) Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "spdk/crc32.h"
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void
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spdk_crc32_table_init(struct spdk_crc32_table *table, uint32_t polynomial_reflect)
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{
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int i, j;
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uint32_t val;
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for (i = 0; i < 256; i++) {
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val = i;
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for (j = 0; j < 8; j++) {
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if (val & 1) {
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val = (val >> 1) ^ polynomial_reflect;
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} else {
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val = (val >> 1);
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}
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}
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table->table[i] = val;
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}
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}
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#ifdef SPDK_HAVE_ARM_CRC
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uint32_t
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spdk_crc32_update(const struct spdk_crc32_table *table, const void *buf, size_t len, uint32_t crc)
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{
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size_t count;
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const uint64_t *dword_buf;
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count = len & 7;
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while (count--) {
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crc = __crc32b(crc, *(const uint8_t *)buf);
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buf++;
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}
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dword_buf = (const uint64_t *)buf;
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count = len / 8;
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while (count--) {
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crc = __crc32d(crc, *dword_buf);
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dword_buf++;
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}
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return crc;
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}
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#else
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uint32_t
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spdk_crc32_update(const struct spdk_crc32_table *table, const void *buf, size_t len, uint32_t crc)
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{
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const uint8_t *buf_u8 = buf;
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size_t i;
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for (i = 0; i < len; i++) {
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crc = (crc >> 8) ^ table->table[(crc ^ buf_u8[i]) & 0xff];
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}
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return crc;
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}
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#endif
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