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Changed the hash algorithm to CRC32 utilising the SSE4.2 instruction. The algorithm will automatically be used for the Accurate Texture Cache, EFB to RAM and texture id's when a SSE4.2 capable CPU is detected. It will fallback to the old algorithm if SSE4.2 is not detected. Using CRC32 speeds up the hash algorithm by around 2X.

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@7060 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
skidau 2011-02-04 08:37:58 +00:00
commit d698e022f5
3 changed files with 161 additions and 93 deletions
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Source/Core/Common/Src/Hash.h
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@ -24,5 +24,6 @@ u32 HashFletcher(const u8* data_u8, size_t length); // FAST. Length & 1 == 0.
u32 HashAdler32(const u8* data, size_t len); // Fairly accurate, slightly slower
u32 HashFNV(const u8* ptr, int length); // Another fast and decent hash
u32 HashEctor(const u8* ptr, int length); // JUNK. DO NOT USE FOR NEW THINGS
u64 GetCRC32(const u8 *src, int len, u32 samples); // SSE4.2 version of CRC32
u64 GetHash64(const u8 *src, int len, u32 samples);
#endif // _HASH_H_