Author: Robert Hyatt
Date: 14:56:12 06/29/04
Go up one level in this thread
On June 29, 2004 at 15:50:00, Vincent Diepeveen wrote: >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... I'd rather not. > >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). I don't have the quote handy. At least 2 years ago and probably longer, when "deep fritz" hit the street, supposedly fritz 8 was a rewrite in C. It was posted here I believe, and not by me. That's all I can say. Personally I'd probably believe it as the asm stuff would be a pain with parallel search. > >>Time will tell... >>>>Fritz does not use bitboards by the way...
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