Author: Vincent Diepeveen
Date: 09:28:03 06/29/04
Go up one level in this thread
On June 29, 2004 at 11:56:05, Robert Hyatt wrote: >On June 29, 2004 at 11:25:08, Jaime Benito de Valle Ruiz wrote: > >>On June 29, 2004 at 08:26:15, Zach Wegner wrote: >> >>>One important point is that crafty uses bitboards, so it will have an additional >>>speedup on a 64 bit processor. >> >>I might be wrong, but I think that Fritz also uses bitboards (I don't know about >>Shredder). >>Anyway, what about the compiler? And what extra efficiency do you expect from a >>64-bit processor? Enough to outsearch all other engines running on similar >>processors? >> >>Jaime > > >AMD has tested Crafty to answer this question. They compiled it for 32 bits, >and for 64 bits. The 64 bit version runs 47% faster than the 32 bit version, >everything else remaining constant. Going from 32 to 64 bits also the number of registers moves up from 8 to 16 which is a big speedup also for Crafty and is inside that 47%. >Fritz does not use bitboards by the way...
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