1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
/**
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0.
*/
#include <aws/checksums/crc.h>
#include <aws/checksums/private/crc_priv.h>
#include <aws/common/cpuid.h>
static uint32_t (*s_crc32c_fn_ptr)(const uint8_t *input, int length, uint32_t previousCrc32) = 0;
static uint32_t (*s_crc32_fn_ptr)(const uint8_t *input, int length, uint32_t previousCrc32) = 0;
uint32_t aws_checksums_crc32(const uint8_t *input, int length, uint32_t previousCrc32) {
if (AWS_UNLIKELY(!s_crc32_fn_ptr)) {
if (aws_cpu_has_feature(AWS_CPU_FEATURE_ARM_CRC)) {
s_crc32_fn_ptr = aws_checksums_crc32_hw;
} else {
s_crc32_fn_ptr = aws_checksums_crc32_sw;
}
}
return s_crc32_fn_ptr(input, length, previousCrc32);
}
uint32_t aws_checksums_crc32c(const uint8_t *input, int length, uint32_t previousCrc32) {
if (AWS_UNLIKELY(!s_crc32c_fn_ptr)) {
if (aws_cpu_has_feature(AWS_CPU_FEATURE_SSE_4_2) || aws_cpu_has_feature(AWS_CPU_FEATURE_ARM_CRC)) {
s_crc32c_fn_ptr = aws_checksums_crc32c_hw;
} else {
s_crc32c_fn_ptr = aws_checksums_crc32c_sw;
}
}
return s_crc32c_fn_ptr(input, length, previousCrc32);
}
|
