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List:       freebsd-amd64
Subject:    Re: CPUTYPE for 32-bit mode?
From:       Jem Matzan <thejemre () thejemreport ! com>
Date:       2004-05-28 2:32:25
Message-ID: 40B6A4B9.7050100 () thejemreport ! com
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Andrew Houghton wrote:

> Not necessarily the best place to ask this question, but..
> What, if any, CPUTYPE setting in /etc/make.conf makes sense for an 
> opteron running in i386 mode?  I'm not sure how much tuning GCC 3.3.3 
> actually provides when fiddling with things like this, so maybe it 
> doesn't matter.  I would use k8 or opteron, but neither are listed as 
> options in /usr/share/examples/etc/make.conf.  athlon-xp and athlon-4 
> seem the next best bet, with (I think) athlon-4 edging out athlon-xp 
> due to support for SSE2 instruction sets.
>
> Should I even bother with this?
>
> - a.
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>
>
athlon-xp will definitely work.

But since the AMD64 architecture uses SSE2 and MMX instructions, you 
could also use p4. There might be a problem that I'm not seeing by using 
the p4 type, but in theory it should work perfectly.

-Jem
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