Re: Cyrix III processor and kernel boot problem

H. Peter Anvin
2003-02-09T21:13:04Z

Followup to: <1044631346.14350.17.camel@irongate.swansea.linux.org.uk>
By author: Alan Cox <alan@lxorguk.ukuu.org.uk>
In newsgroup: linux.dev.kernel
>
> On Fri, 2003-02-07 at 14:50, c1cc10 wrote:
> > I've found out that the Cyrix III has no CMOV instruction and that this
> > could be the problem.
>
> It is
>
> gcc told to build for i686 assumes that cmov is present. Much of the
> code advantage for i686 comes from cmov so it makes sense to do that
> I guess.
>

Yep. The other name for the option, -mach=pentiumpro, really is the
more proper name.

-hpa
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