Author: Simon Waters
Date: 12:09:11 10/28/00
Hi, been bit twiddling the gnuchess leadz and nbits routines, that find most significant bit and population count respectively. Seems to have had a minor performance benefits (few %) and got rid of the nasty table lookup's. Anyone know of any good reference on these things? Anyone know of a C library that implements bit counting efficently across architectures? Crafty appears to have gone "assembler" on this.... but it would be nice to delegate to a library. Is Intel x86 (and clones) the only architecture not to implement a bit count? Simon "Cyrix Instead" Waters
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