-------------- Original message --------------
From: "Mikhail Kuzminsky" <[EMAIL PROTECTED]>
> In message from [EMAIL PROTECTED] (Fri, 12 Oct 2007 20:50:08
> +0000):
> >Mikhail,
> >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.
> ....
> >Regards,
> >rbw
> >--
> 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 ?
Mikhail,
Whoops ... ;-( ... I should have said 23XX. That is the Barcelona generation.
If you were talking about generation two, then what I said about a 64-bit
serialize staging of the 128-bit wide SSE FPU operations applies. Sorry, if I
caused confusion. My comments regarding near-floating-point functional unit
equivalency should be confined to comparing the 23XX series Opteron with the
Clovertown/Harpertown processors from Intel. The point about 3-wide versus
4-wide applies with all Opteron generations.
Dobray Utra,
rbw
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