[Beowulf] quad-core SPECfp2006: where are 4 FPresults/cycle ?
kus at free.net
Sat Oct 13 08:10:14 PDT 2007
In message from richard.walsh at comcast.net (Fri, 12 Oct 2007 20:50:08
>I am not sure I fully understand what you are presenting here, but I
>might say that yes, at the FPU unit level the 2222 series AMD
>Opteron/Barcelona and the Intel Core2/Clovertown (and also Harpertown
>at 45 nm) are now more largely equivalent -- that is they both can
>execute 2, double-wide (2x64 bit) floats in certain FMA situtations
>simultaneously and/or in a pipeline.
Sorry, now I'm misunderstanding :-)
I thought that Opteron 2222 don't have Barcelona microarchitecture
(all the Barcelona's are 23xx or 83xx) and therefore can't perform
4*64 bit FP results per cycle. Am I wrong ?
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