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Date: Fri, 12 Jul 2013 20:06:22 +0400
From: Solar Designer <>
Subject: Re: Parallella: bcrypt

Hi Katja,

On Fri, Jul 12, 2013 at 05:53:11PM +0200, Katja Malvoni wrote:
> I locked up 2nd board while experimenting with assembly implementation of
> BF_ROUND. I'm not sure how that happened - the only change I made to code
> that was running but didn't produce result (it stuck somewhere but didn't
> lock up the board) was putting constants (offsets of S-box to pointer to
> BF_ctx structure) in registers. I used only caller saved registers (r16-r27
> and r12), iadd instead of add and just followed C code and compiler
> generated assembly code and wrote BF_ROUND from scratch just to make it
> work. My guess is that I wasn't loading values from S-box but from
> somewhere else. I'm sorry and I'll be more careful with future tests.

No problem.  I've just power-cycled the board, and it is back up now.


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