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21 lines
368 B
C++
21 lines
368 B
C++
#include "crc32.h"
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#include <cstring>
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#include <immintrin.h>
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u32 crc32(const u8* data, size_t size) {
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u32 result = 0xffffffff;
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while (size >= 4) {
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u32 x;
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memcpy(&x, data, 4);
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data += 4;
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size -= 4;
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result = _mm_crc32_u32(result, x);
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}
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while (size) {
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result = _mm_crc32_u8(result, *data);
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data++;
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size--;
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}
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return ~result;
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} |