Author: Tim Mann
Date: 13:32:40 01/18/01
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On January 15, 2001 at 20:15:17, Ralf Elvsén wrote: >I looked ay the instruction set for the Itanium processor. >As far as I could see there was no instruction to get the first/last >bit set. > >Can someone with insight in processor design describe the >considerations done by the designers when they decide to >include or to not include such an instruction? (Assuming they >are not chess programmers :) I don't know how many transistors it takes. One thing I can tell you is that if you want to sell machines to the NSA, it helps a lot to have that instruction. I'm sure (unofficially of course) that that's why Alphas have it now, starting with the 21264A (EV67). --Tim
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