Author: Robert Hyatt
Date: 17:43:54 01/03/03
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On January 03, 2003 at 17:51:41, Scott Gasch wrote: >>At his beloved P4 the >> instruction is very very very very slow. > >How can a shift operation be very slow? I would suspect just the opposite -- >blazingly fast to the point that whether you have it in there or not makes no >difference. > >Scott He doesn't understand the difference between "latency" and "throughput". The shift has a somewhat long latency (6 clocks max I think). But other things go on while that is in the pipe, so it doesn't hurt as much as he thinks...
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