Author: Robert Hyatt
Date: 19:25:27 10/27/99
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On October 27, 1999 at 18:37:14, James Swafford wrote: >On October 27, 1999 at 12:04:36, Robert Hyatt wrote: > >>On October 26, 1999 at 19:52:55, James Swafford wrote: >> > >[snip] > >>> >>>Not the prettiest, but it works. I can't see how anybody's >>>would be significantly different. >>> >>>-- >>>James >> >> >>Look at the "COMPACT_ATTACKS" stuff in crafty. It is _far_ different. >>almost to the point of being impossible to understand. In any case, your 64 >>bit attack bitmaps aren't 64 bits in crafty... they are much shorter. They take >>more instructions to generate moves, but much less memory bandwidth, which is >>more important on the PC. > > >If it's more important on the PC to conserve memory bandwidth, why >don't you do something similar? > >-- >James I don't follow. That is what compact_attacks is all about. It takes the usual 64 bit attack bitmaps and compresses them into 2 bytes (or less). Mark Bromley wrote the code and that was the thing that drove him to do so, the limited memory bandwidth.
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