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Message-ID: <20150819172703.GA17294@openwall.com>
Date: Wed, 19 Aug 2015 20:27:03 +0300
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: PHC: Argon2 on GPU

On Wed, Aug 19, 2015 at 07:12:55PM +0200, Agnieszka Bielec wrote:
> it's slower with wrap instead of %
> I just changed x % y to number 5 and I gained speed only on my 960m
> from 1861 to 1878 (argon2i). I will check again % after another
> optimizations

I expected this to make more of a difference, but that's OK.  As usual,
reviewing the generated GPU ISA code would be helpful to figure out
what's going on.

BTW, with "changed x % y to number 5" you probably had it process
uninitialized data until 5 blocks were written.

Alexander

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