Author: Jeremiah Penery
Date: 20:27:19 11/17/02
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On November 17, 2002 at 18:47:42, Robert Hyatt wrote: >The bit scan instructions in the X86 architecture are the fastest way to >find a one bit. BSF/BSR are the instructions... How many cycles does it take without those instructions? On the P2/P3/P4(?) those are like 1 cycle operations, but they are very slow (12 cycle latency or something) on Athlons. If there is a reasonably fast alternative, it might improve Athlon performance some.
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