RE: [Monotone-devel] Fast SSSE3 based SHA-1 by Intel

[Locktyukhin, Maxim]

Jack - hi, no problem, at least for 64-bit I suggest you take the code as is 
(hopefully NASM syntax works for you), as it has micro-architectural 
performance tuning besides the high-level vectorization idea, not only for 
currently available processors but also for a few future generations of Intel 
CPUs

-Max

-----Original Message-----
From: Jack Lloyd [mailto:address@hidden
Sent: Thursday, June 03, 2010 12:53 PM
To: Locktyukhin, Maxim
Cc: monotone-devel
Subject: Re: [Monotone-devel] Fast SSSE3 based SHA-1 by Intel


Thanks! I'll look into implementing this optimization; monotone
already uses the SSE2-based optimizations when possible, but SHA-1
computions are a fairly core operation (the compression function is
about 8% of the total runtime on many operations, IIRC) so any new
improvements are a plus.

Regards,
  Jack

On Thu, Jun 03, 2010 at 08:59:34AM -0700, Locktyukhin, Maxim wrote:
> Hi All,
>
> I accidentally came across this project/article: 
> http://www.monotone.ca/wiki/SpeedySpeedySHA1/
>
> Thought you may be interested in this one: 
> http://software.intel.com/en-us/articles/improving-the-performance-of-the-secure-hash-algorithm-1/
>
> Feel free to use it.
>
> Thanks,
> -Max
>

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