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Re: ia32e, er EM64T that is...



On Mon, 2004-09-06 at 13:47 -0400, Alan Cox wrote:

> em64t as Intel currently call it is pretty close to the x86-64 architecture
> so its not too bad a clone. It lacks prefetch/prefetchw which can also be 
> used by some fancy user space stuff like image processors. 

Er, EM64T provides the SSE prefetch{nta,t[012]} instructions, which are
somewhat more expressive than prefetch anyway, and which also run on AMD
chips.  Shame about the lack of a prefetchw analogue, but it's hardly a
surprise that Intel isn't implementing 3dnow.

	<b



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