lothrandil at n00b.apagnu.se
Fri Nov 10 22:17:14 UTC 2006
Jason C. Wells wrote:
> I have set CPUTYPE=p3 in make.conf. When I compile my kernel I see
> -march=pentium3 as I expect. I also see -mno-mmx and -mno-sse are set
> which I do not expect given that -march=pentium3 is used. I presume
> that I want MMX and SSE since my processor supports it. What options do
> I set and where do I set them to get a kernel properly tuned for pentium3?
> Jason C. Wells
If i recall correctly, instructions taking advantage of sse, mmx etc.
are purposefully disabled in the kernel via the mentioned options. I can
not at the moment recall why though.
Ordinary userland applications and ports are usually compiled to take
advantage of those instructions if the CPU supports them.
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