The only compelling reason to use MMX is actually that you could in
theory do copy-and-ipv4-csum with them. Peter Anvin had some code
that would probably work, but it was complex enough that it was not
clear whether it would really be a win..
Pointers to this? I'm curious if it looks similar to the VIS version
we wrote for the Ultra port.
Later,
David S. Miller
davem@dm.cobaltmicro.com
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