Re: Noob question. Why is the for-pentium4 kernel built with -march=i686 ?

[Bodo Eggert]

Ivan Yosifov <ivan@xxxxxxxxxxx> wrote:

> -march implies -mtune and also implies thing like -msse2 for the
> instruction set where applicable.
> I think -march=pentium4 is equivalent to -mmmx -msse -msse2
> -mtune=pentium4 ( if I have not fogotten anything ).
> Pentium4 supports things like sse2 and mmx which AFAIK plain i686 does
> not.

AFAIK it's not possible to use SSE and MME in kernel mode, since these
registers aren't preserved (it would be expensive).
-- 
Ich danke GMX dafür, die Verwendung meiner Adressen mittels per SPF
verbreiteten Lügen zu sabotieren.
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