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Date: Wed, 11 Apr 2001 15:42:15 -0700
From: "H. Peter Anvin" <hpa@transmeta.com>
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To: Alan Cox <alan@lxorguk.ukuu.org.uk>
CC: "H. Peter Anvin" <hpa@zytor.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] i386 rw_semaphores fix
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Alan Cox wrote:
> 
> > Yes, the big 686 optimization is CMOV, and that one is
> > ultra-pervasive.
> 
> Be careful there. CMOV is an optional instruction. gcc is arguably wrong
> in using cmov in '686' mode. Building libs with cmov makes sense though
> especially for the PIV with its ridiculously long pipeline
> 

It is just a matter how you define "686 mode", otherwise the very concept
is meaningless.

	-hpa

-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
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