Author: Vincent Diepeveen
Date: 12:50:00 06/29/04
Go up one level in this thread
On June 29, 2004 at 12:48:06, Robert Hyatt wrote: >On June 29, 2004 at 12:28:03, Vincent Diepeveen wrote: > >>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%. > > >Does not change their statement or measurement... > >And the question will be whether or not the commercial guys use a beta compiler >to produce accesses to those extra registers. If, as you always claim, fritz is >in ASM (rather than what Frans claims, that it was rewritten into pure C a >couple of years back) then it won't be able to touch those registers either... Fritz will be opteron assembly, read my lips... Please show me a statement from Frans where he quotes it is written entirely in C. I cannot remember that at all. They (reporters) just ask whether 'fritz' is written in C. The answer is probably 'yes' to that (interface). >Time will tell... >>>Fritz does not use bitboards by the way...
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