[lsb-discuss] x86_64 binary RPMs for both AMD and Intel 64-bit distos?

Alan alan at lxorguk.ukuu.org.uk
Wed Nov 29 13:09:21 PST 2006

> It is the intent of the AMD64 spec to support all EMT64T code, and ALL
> compliant apps should run on both AMD and Intel 64 bit processors.
> The 3DNow! instructions (which are the principle difference between the
> two) are explicitly excluded.

The specific nasty is prefetch/prefetchw. On x86-32 these are 3Dnow
instructions, on AMD x86-64 they are part of the base instruction set. On
at least some Intel 64bit clones they are not present.

The documentation is thus a little ambiguous here.


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