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Use CRC to output 64 bits instead of 32 

A bit hacky, but should dramatically reduce the odds of hash collision.
This commit is contained in:
Fiora 2014-10-18 00:22:41 -07:00
parent 742f9c6b14
commit d2e004fa9e
1 changed files with 2 additions and 1 deletions
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3
Source/Core/Common/Hash.cpp
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@ -254,7 +254,8 @@ u64 GetCRC32(const u8 *src, int len, u32 samples)
const u8 *data2 = (const u8*)end; const u8 *data2 = (const u8*)end;
// FIXME: is there a better way to combine these partial hashes? // FIXME: is there a better way to combine these partial hashes?
return _mm_crc32_u64(h[0] + h[1] + h[2] + h[3], u64(data2[0])); h[0] = _mm_crc32_u64(h[0], u64(data2[0]));
return h[0] + (h[1] << 10) + (h[2] << 21) + (h[3] << 32);
#else #else
return 0; return 0;
#endif #endif