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From: Paul Brook <paul@codesourcery.com>
To: Laurent Desnogues <laurent.desnogues@gmail.com>
Cc: Filip Navara <filip.navara@gmail.com>, qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [PATCH] RFC: TCG constant propagation.
Date: Thu, 23 Jul 2009 10:30:49 +0100	[thread overview]
Message-ID: <200907231030.50519.paul@codesourcery.com> (raw)
In-Reply-To: <761ea48b0907230225g77d7d0e6q6e1fd8af302ed795@mail.gmail.com>

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

  reply	other threads:[~2009-07-23  9:31 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-07-21 14:37 [Qemu-devel] [PATCH] RFC: TCG constant propagation Filip Navara
2009-07-23  9:08 ` Filip Navara
2009-07-23  9:25   ` Laurent Desnogues
2009-07-23  9:30     ` Paul Brook [this message]
2009-07-23  9:49     ` Filip Navara
2009-07-23 20:10   ` Stuart Brady
2009-07-23 20:28     ` Filip Navara
2009-07-23 22:02   ` Daniel Jacobowitz
2009-08-05  8:13 ` Pablo Virolainen
2009-08-05  8:48   ` Filip Navara

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