Subject: Re: [Q] Looking for an emulation for CMOV* instructions.
To: Ronald.Wahl@informatik.tu-chemnitz.de (Ronald Wahl)
Date: Fri, 11 Jan 2002 00:26:07 +0000 (GMT)
Cc: alan@lxorguk.ukuu.org.uk (Alan Cox), linux-kernel@vger.kernel.org
In-Reply-To: <m2wuypn3zs.fsf@goliath.csn.tu-chemnitz.de> from "Ronald Wahl" at Jan 11, 2002 01:08:39 AM
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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Sender: linux-kernel-owner@vger.kernel.org

> > hard to get emulations right. I grant that this wasn't helped by the fact
> > the gcc x86 folks also couldnt read the pentium pro manual correctly.
>       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^       
> What do you mean with this? Explain, please!

gcc told to generate i686 binaries uses cmov unconditionally. The intel
PPro handbook explicitly says that cmov must be checked for.

> myself but I have also some older machines here that have a k6 or a
> pentium. For mistake I installed the wrong rpm and had a non working
> system. An emulation for such cases would be a _real_ feature at least

So you have a buggy rpm program. Get the rpm program fixed so it correctly
stops you from doing that.

Alan
--
	    If my call is so important to you why don't you hire 
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