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From: Paul Brook <paul@codesourcery.com>
Subject: Re: [Qemu-devel] [PATCH] RFC: TCG constant propagation.
Date: Thu, 23 Jul 2009 10:30:49 +0100
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To: Laurent Desnogues <laurent.desnogues@gmail.com>
Cc: Filip Navara <filip.navara@gmail.com>, qemu-devel@nongnu.org

On Thursday 23 July 2009, Laurent Desnogues wrote:
> On Thu, Jul 23, 2009 at 11:08 AM, Filip Navara<filip.navara@gmail.com> 
wrote:
> > Also it looks that the actual code size is worse for TCG ARM target
> > with this optimization. To mitigate it I propose the other attached
> > patch which uses the barrel shifter for more optimal generation of the
> > "movi" operation. I can't test it, so any help is welcome.
>
>    - the rotation amount is multiplied by 2 before being applied to the
>      8-bit immediate field.

This is compensated for by the later << 7

Paul