Re: [git pull] x86 fixes

H. Peter Anvin
2008-09-09T17:06:18Z

Andi Kleen wrote:
> Krzysztof Halasa <khc@pm.waw.pl> writes:
>
>> Linus Torvalds <torvalds@linux-foundation.org> writes:
>>
>>> - "modern 32-bit": PPro and better. Can take CMOV, MMX and TSC for
>>> granted.
>> VIA C3 (Samuel 2/Ezra, 600 - 1000 MHz?, common on VIA EPIA-*: home
>> theatres etc) can't CMOV.
>
> AFAIK they fixed that in newer BIOS with a microcode update. It's
> slow, but it works.
>

Yes, but if it's slower than jmp+mov than you actively want to avoid it.

-hpa