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Message-ID: <20121209021343.GA1439@openwall.com>
Date: Sun, 9 Dec 2012 06:13:43 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: GCN: indexed access to VGPRs
Sayantan -
On Sat, Dec 08, 2012 at 09:08:33PM -0500, Alain Espinosa wrote:
> On 12/8/12, Solar Designer <solar@...nwall.com> wrote:
> > How do you access the indexed registers? (And it's the same register
> > file, just accessed differently - right?) Is it via a private array as
> > you mention below? -
>
> Via the private array in OpenCL and then checking the code generated.
> Is the same register file as you point out.
Would you try this for bcrypt-opencl? e.g. try to implement two hashes
per work-item, by having S-boxes of one of them in a local array (like
it's done now) and the other in a private array. In fact, you can start
by using a private array only (as an experiment).
Alexander
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