Re: [git pull] x86 fixes

From: H. Peter Anvin
Date: Tue Sep 09 2008 - 13:06:19 EST


Andi Kleen wrote:
Krzysztof Halasa <khc@xxxxxxxxx> writes:

Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> 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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/