Author: Larry Griffiths
Date: 18:50:59 06/26/00
I was thinking it would be nice to have an instruction that would select bits using a mask. It looks like Intel has a pmovmskb instruction that takes the high-order bit of each byte in an MMX register and copies it to a destination register. The description of this instruction is Move Byte Mask to Integer. This would work for selecting out a rank from a file bitmap and vice-versa. I would like to see an instruction called Move Bit Mask to Integer. It would select only the bits from the source register using a 64-bit mask register. I could then extract diagonals from a regular rank bitmap. Of course, feel free to add your OWN list of instructions you would like to see :) LOL Larry.
This page took 0.01 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.