linux-kernel - Re: kernel + gcc 4.1 = several problems

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Message-ID: <20070103124410.4cb191dd@localhost.localdomain>
Date:	Wed, 3 Jan 2007 12:44:10 +0000
From:	Alan <alan@...rguk.ukuu.org.uk>
To:	Grzegorz Kulewski <kangur@...com.net>
Cc:	Mikael Pettersson <mikpe@...uu.se>, s0348365@....ed.ac.uk,
	torvalds@...l.org, 76306.1226@...puserve.com, akpm@...l.org,
	bunk@...sta.de, greg@...ah.com, linux-kernel@...r.kernel.org,
	yanmin_zhang@...ux.intel.com
Subject: Re: kernel + gcc 4.1 = several problems

> > fixed. At that point an i686 kernel would contain i686 instructions and
> > actually run on all i686 processors ending all the i586 pain for most
> > users and distributions.
> 
> Could you explain why CMOV is pointless now? Are there any benchmarks 
> proving that?

Take a look at the recent ffmpeg bits on the mplayer list for one example
I have to hand - P4 cmov is pretty slow. The crypto folks find the same
things.

Alan

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