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

[Lee Revell]

On Tue, 2005-07-19 at 22:15 +0200, Jan Engelhardt wrote:
> >AFAIK it's not possible to use SSE and MME in kernel mode, since these
> >registers aren't preserved (it would be expensive).
> 
> Floating point is anyway a no-no in the kernel. 

However, there are a few exceptions like mmx_memcpy.

Lee

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