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Date: Thu, 4 Oct 2012 18:41:59 -0300
From: Claudio André <>
Subject: Re: Office2013 OpenCL

2012/10/4 magnum <>:
> I just committed an OpenCL Office 2013 format, using your SHA-512 (but optimised for loop use). It works fine on nvidias and CPU but fails self-test on HD7970. I think the code is fine so it may be some kind of driver bug that has to be worked around. If you have some spare time, please have a look.

I will.
Just for fun, let me tell you a story. I wasted a couple of day trying
to figure out what i was doing wrong in the split task. After a lot of
debugging i realized there is a bug in 12.6 AMD driver/compiler or
whatever. Remenber i was running on my 6770 (not new) hardware,
updated driver, etc.

I saw you committed some "work around" for RAR on OSX.
It is sad we are fighting so hard with AMD and NVIDIA (and APPLE?) software.

> BTW it does around 44 million SHA-2 per second on the 570 and over 75 million on HD7970. Are those speeds fair or lousy? There is a huge need for private memory so I have no idea how to get it faster.

Well, i tried once to compare raw 512 and 512crypt. Then, i realized
that on sha512crypt i measure rounds (not 'digest' operations,
'neigher' blocks operations). Not sure if i am clear here, but your
number seems to be ok if i can compare your solution with mine.
Anyway, i will try to think about it while looking at the code.
And yes, the pressure for registers is amazing. I haven

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