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Date: Sat, 22 Sep 2012 00:31:26 +0530
From: Sayantan Datta <>
Subject: Re: bitslice DES on GPU

Hi Alexander,

I was experimenting with DES_BS_EXPAND set to 0 and using different types
of memory .

1. B[] in local memory and K[] in private register space:
With this combination I'm getting speeds of around 24M c/s on 7970 and 5M
c/s on 570.

2. B[] in private register space and K[] in local memory
I'm getting 12M c/s on 570 while I couldn't get it working on 7970. Getting
hash fails every time. Most likely the problem is with referencing B[]
array in z(p) macro.


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