On Tue, 3 Jun 2014 05:54:12 -0700, Charles Mills wrote:
>XR over SR seems to be a persistent myth. I have been told again and again
>from time to time that XR was faster than SR. There is no reason it should
>be, and the evidence is that it is not.
>
Carry propagation delay? Not likely on the z, but see:
http://arc.cecs.pdx.edu/about
The author(s) may be oblivious to the requirements of pipelining.
-- gil
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