Author: Steve Maughan
Date: 03:54:10 12/11/01
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Vincent, >On my paper bitboards should be much faster on K7 as you can >do BSF/BSR to a 64 bits register without branch mispredictions, >and i don't see how to do that on the P3. Interesting. Can you explain a little more? Is this Dann Corbit's trick i.e. function BSF(var i : int64) : integer; register; overload; asm BSF ECX,DWORD PTR [EAX+04h] ADD ECX,32 BSF ECX,DWORD PTR [EAX+00h] MOV EAX,ECX end; Or do you mean using MMX? Are there any code snippets? Thanks, Steve
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