Date: Tue, 9 Mar 1999 15:41:52 -0700 (MST)
From: "Dmitri A. Sergatskov" <dima AT coffee DOT phys DOT unm DOT edu>
To: "pgcc AT delorie DOT com" <pgcc AT delorie DOT com>
Subject: Re: Optimizations questions
In-Reply-To: <19990309174332.D2217@cerebro.laendle>
Message-ID: <Pine.LNX.4.04.9903091514430.11608-100000@coffee.phys.unm.edu>
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On Tue, 9 Mar 1999, Marc Lehmann wrote:

> On Mon, Mar 08, 1999 at 08:45:32PM -0600, Steve Bergman wrote:
> > I'm getting ready to recompile my RH5.2 system and 2.2.2 kernel.  I have an
> > AMDK6-2/300.  Would "-O6 -march=amdk6 -mcpu=amdk6" be reasonable options to set
> > in rpmrc?  What is the status of "-fstrength-reduce" and "-funroll-all-loops"
> 
> strength-reduce is fixed. it was never broken enough to warrant turning it
> off in the first place.
> 

The question with strength-reduce popped up few times on egcs list and
Michael Meissner recommended to turn it off for all register starved
CPU archs (which I think means all x86 CPUs).

FWIW.

Sincerely,

Dmitri.