Author: David Blackman
Date: 22:42:19 02/18/00
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On February 18, 2000 at 21:11:58, Tom Kerrigan wrote: > >You just got the docs for the SIMD instructions? Where? Does it look like the >chips have a FindFirstBit instruction, etc.? > >-Tom I didn't see the docs, but read some of the discussion. The thing has a 20 stage pipeline. They claim they use every trick there is for branch prediction, but still, you should have a close look at your program and ask how you can make your branches easier to predict (or remove them completely). Also, how you can overlap various computations so you don't get 20 clock pipeline stalls. That kind of stuff is probably going to be the most important optimisation for most future chips, as pipelines get longer. So, it's time to re-evaluate 12x10 vs 0x88 vs bitboards vs attack maps in the light of long pipelines. I suspect bitboards or attack maps look better for eval purposes (but they were always good there).
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