Date:	Tue, 11 May 1999 00:10:39 +0200
To:	pgcc AT delorie DOT com
Subject:	Re: What types of optimizations are present for the K6?
Message-ID:	<19990511001039.K22062@cerebro.laendle>
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In-Reply-To:	<37374C32.4D12565A@home.com>; from Graham TerMarsch on Mon, May 10, 1999 at 02:14:26PM -0700
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From:	Marc Lehmann <pcg AT goof DOT com>
Reply-To:	pgcc AT delorie DOT com
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On Mon, May 10, 1999 at 02:14:26PM -0700, Graham TerMarsch wrote:
> Have been trying out pgcc here on my K6-III system to see if I could actually
> see any performance improvement out of optimizing my compiles for this
> processor.  I've tried '-mk6' and '-march=k6', but have only found the effect
> that it actually generates _slower_ code than egcs-1.1.2 does.
> 
> So, uh, wanted to find out a bit more about what types of optimizations we're
> doing for K6 processors, and find out if anyone had other tips on cmd line

A different scheduling is used for the k6.

> FWIW, both the 'gzip' and 'xfree86' compiles were done with '-O2' for both
> egcs and pgcc compiles.

pgcc should be almost identical to egcs if only -O2 is used. Check the FAQ!

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