Author: Robert Hyatt
Date: 14:57:52 12/07/00
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On December 07, 2000 at 15:20:02, Roy Eassa wrote: >But what impact, if any, does floating point have on such chess apps as Crafty, >Chess Tiger, Fritz, Junior, Hiarcs, Shredder, et. al.? (E.g., which would help >them more: a 50% boost in integer speed only, or a 200% boost in floating speed >only?) At present, we all use ints on PC platform machines, so making FP faster wouldn't help until programs were modified to use FP math where possible. > > >On December 07, 2000 at 15:11:55, Robert Hyatt wrote: > >>On December 07, 2000 at 14:53:11, Roy Eassa wrote: >> >>>5+ years ago, in another chess computer forum, I recall posting that computer >>>chess makes essentially no use of floating point arithmetic. I.e., the >>>performance of the CPU's integer arithmetic was overwhelmingly more important to >>>its performance running chess software than its floating point performance. >>> >>>Is that correct in today's top programs? Was I even correct back then? >> >> >>back then it depended on the architecture. IE Cray was no slouch at FP >>arithmetic, and in many cases FP was a fast or faster than int math. In >>today's PC, FP is slower, but with the multiple-pipe superscalar approach, >>some FP could be beneficial as those operations could be done in parallel >>with int operations.
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