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Date: Thu, 18 Oct 2012 08:08:36 +0530
From: Sayantan Datta <std2048@...il.com>
To: john-dev@...ts.openwall.com
Subject: Re: bf-opencl fails self-test on CPU
HI magnum,
On Thu, Oct 18, 2012 at 2:49 AM, magnum <john.magnum@...hmail.com> wrote:
> Just try it. Usually it's increadibly simple to add vectorizing. Most of
> my formats run vectorized on CPU and non-GCN AMD, and scalar on nvidia &
> GCN. Just a few #ifdefs.
>
> I always use uint4 or ulong4 (even though those end up in different size).
> I think once you use eg. uint4 instead of uint, the auto vectorizer may
> change that to other vector sizes automatically if/when beneficial. That is
> much less magic than auto vectorization of scalar code.
>
I guess you mean I should vectorize the private arrays that have a compile
time constant indexing. Is it worthwhile to vectorize the arrays stored in
global memory /local memory ? For blowfish I don't have much private arrays
with compile time constant indexing. So I made a new kernel that process
two hash together using uint2 vectors. I will later try processing four of
them together using uint4.
Regards,
Sayantan
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