Author: Vincent Diepeveen
Date: 04:17:08 06/08/98
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On June 05, 1998 at 21:48:57, Robert Hyatt wrote: >On June 05, 1998 at 17:47:07, Bruce Moreland wrote: > >> >>On June 05, 1998 at 08:53:53, Ernst A. Heinz wrote: >> >>>BTW, we have been waiting to get our hands on a Alpha-21264 for roughly >>>a year because "DarkThought" will hopefully speed up as much on them >>>as "Crafty". >> >>What percentage of execution time do you and Bob spend doing these >>operations, do you think? >> >>bruce > >FindFirstOne() = 1-2% in crafty. popcnt is much less... so that won't >help a whole lot. but the 64 bit stuff helps in general... Well that doesn't say anything concrete. More important is the overall delay. At a P133 intel the speed difference between crafty's move generator and diep's move generator is somewhat more than 3 times. Crafty is more than 3 times slower, because of bitboards, which perform badly at 32 bits. Note that the more possibilities, this 3 times will become 4 times. For something taking 1 clockcycle in my program and which can be even pipelined in U + V pipe, crafty needs sometimes even a whole function. Greetings, Vincent
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