Date: Fri, 20 Jun 2003 12:56:20 -0400
From: Jeff Garzik <jgarzik@pobox.com>
To: Eli Carter <eli.carter@inet.com>
Cc: John Bradford <john@grabjohn.com>, nuno.silva@vgertech.com,
       torvalds@transmeta.com, linux-kernel@vger.kernel.org, samphan@thai.com,
       vojtech@suse.cz
Subject: Re: Crusoe's persistent translation on linux?
Message-ID: <20030620165620.GA9164@gtf.org>
References: <200306201040.h5KAerPK000431@81-2-122-30.bradfords.org.uk> <3EF33B12.7070901@inet.com>
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On Fri, Jun 20, 2003 at 11:49:22AM -0500, Eli Carter wrote:
> Hmm... basically you want to trim the x86 instruction set to get closer 
> to RISC mentality.  Interesting.  gcc may already do that to some extent 
> by not using the really complex instructions.  If that is the case, 
> dropping those instructions might give some room for testing some of its 
> possible benefits.  I doubt restricting the registers used by some 
> instructions would help... I've heard comments that the x86 is 
> register-starved enough already.

Newer CPUs do register renaming in an attempt to avoid the
register-starved ISA issue.  I presume Xmeta would do something
similar...

	Jeff


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