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/*-
* BSD LICENSE
*
* Copyright (c) Intel Corporation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "util_internal.h"
#include "spdk/crc32.h"
void
crc32_table_init(struct spdk_crc32_table *table, uint32_t polynomial_reflect)
{
int i, j;
uint32_t val;
for (i = 0; i < 256; i++) {
val = i;
for (j = 0; j < 8; j++) {
if (val & 1) {
val = (val >> 1) ^ polynomial_reflect;
} else {
val = (val >> 1);
}
}
table->table[i] = val;
}
}
#ifdef SPDK_HAVE_ARM_CRC
uint32_t
crc32_update(const struct spdk_crc32_table *table, const void *buf, size_t len, uint32_t crc)
{
size_t count;
const uint64_t *dword_buf;
count = len & 7;
while (count--) {
crc = __crc32b(crc, *(const uint8_t *)buf);
buf++;
}
dword_buf = (const uint64_t *)buf;
count = len / 8;
while (count--) {
crc = __crc32d(crc, *dword_buf);
dword_buf++;
}
return crc;
}
#else
uint32_t
crc32_update(const struct spdk_crc32_table *table, const void *buf, size_t len, uint32_t crc)
{
const uint8_t *buf_u8 = buf;
size_t i;
for (i = 0; i < len; i++) {
crc = (crc >> 8) ^ table->table[(crc ^ buf_u8[i]) & 0xff];
}
return crc;
}
#endif
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