Author: Antonio Dieguez
Date: 09:19:55 01/26/03
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On January 26, 2003 at 12:00:03, Robert Hyatt wrote: >On January 26, 2003 at 11:55:27, Antonio Dieguez wrote: > >>On January 26, 2003 at 10:34:51, Robert Hyatt wrote: >> >>>Fen starts from the last rank because, by standard, chess boards are displayed >>>with white on the bottom. It is more natural to read left to right, top to >>>bottom, which means a8-h8, a7-h7, ..., a1-h1 >>> >>>It was done for simplicity and nothing else. >> >>Hi, still, I don't know if you don't loop too much, with your magical bitboards, >>but with other repr one would like to increment the position when moving forward >>with white so it has its simplicity there. > >you can still do that. Just let the LSB = a1, rather than the MSB. Then you >can use native BSR/BSF instructions that will return the right number... Or >the LSB could be h1 and go up from there if you want to be able to "visualize" >things a bit easier. > >In Crafty, I have symbolically named each bit with a typedef, so changing this >is not all _that_ hard, and I am probably going to do it one day before long >simply to make BSF/BSR more useful. haha. ok then. I'm just an iliterate. LSB? BSF/BSR? :) forget what i said if it is unimportant. best wishes.
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