linux-kernel - Re: [PATCH 2/3] [CRYPTO] Add optimized SHA-1 implementation for i486+

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Message-ID: <20070613055030.GJ11166@waste.org>
Date:	Wed, 13 Jun 2007 00:50:31 -0500
From:	Matt Mackall <mpm@...enic.com>
To:	linux@...izon.com
Cc:	bgilbert@...cmu.edu, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] [CRYPTO] Add optimized SHA-1 implementation for i486+

On Tue, Jun 12, 2007 at 01:05:44AM -0400, linux@...izon.com wrote:
> > I got this code from Nettle, originally, and I never looked at the SHA-1 
> > round structure very closely.  I'll give that approach a try.
> 
> Attached is some (tested, working, and public domain) assembly code for
> three different sha_transform implementations.  Compared to C code, the
> timings to hash 10 MiB on a 600 MHz PIII are:
> 
> The names are the order they were written in.  "One" is the lib/sha1.c
> code (547 bytes with -Os).  "Four" is a 5x unrolled C version (1106 bytes).

I'd like to see your version four.

-- 
Mathematics is the supreme nostalgia of our time.
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