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SubjectRE: [PATCH 10/10] x86-32: panic on !CX8 && XMM
Date

> NAK in the extreme.
>
> This is not how we deal with these kinds of stuff. If this really
> matters, we explicitly clear the CPU feature in the feature detect code.
Also, don't forget the NT4 CX8 bug with non-Intel/AMD/Cyrix vendors:
http://www.geoffchappell.com/studies/windows/km/cpu/cx8.htm
If a processor support SSE (or PAE or MMX for that matter), you can pretty much assume CX8 exists even if the feature bit is cleared because of this bug.

Yuhong Bao

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