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ev6, ev67 or ev68?
On a DS25, with ev68 CPU, I cannot set -mcpu=ev68 as CFLAGS, because
that option is not supported. Should I set it to ev6 or to ev67 then?
Which is the main difference in that?
If I set no -mcpu option I have problems since the g++ compiler seems
to work not properly.

Thanks

d
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Re: ev6, ev67 or ev68? [ In reply to ]
On Mon, Sep 19, 2005 at 08:38:04PM +0200, Davide Cittaro wrote:
> On a DS25, with ev68 CPU, I cannot set -mcpu=ev68 as CFLAGS, because
> that option is not supported. Should I set it to ev6 or to ev67 then?
> Which is the main difference in that?
> If I set no -mcpu option I have problems since the g++ compiler seems
> to work not properly.
>
> Thanks
>
Using -mcpu=ev67 is fine. ev68 doesn't support any new instructions
afaik and scheduling is similar as well. If you decide to use -mcpu=ev6
you're going to miss the CIX instruction set and probably suffer
(somewhat) lower performance.

Regards,
Bryan Østergaard
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