On Fri, Sep 06, 2002 at 09:28:28PM -0400, Kenneth Culver wrote:

> Athlon XP processors support SSE instructions, but not at the same
> time as 3dnow instructions. The processor has to switch modes or
> something like that. What if a user wants to actually use the 3dnow
> instructions? Does this mean that on an athlon XP which supports SSE
> instructions, if you don't want to enable them you'll catch SIGILL
> and die when using those "certain apps?" Just wondering.

I assume the compiler is not stupid enough to try and use both when
that is impossible.  Don't forget this is all just passing a CPU name
to gcc which actually decides what instructions to use.


Attachment: msg42701/pgp00000.pgp
Description: PGP signature

Reply via email to