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

From: Matt Mackall
Date: Wed Jun 13 2007 - 01:50:47 EST

On Tue, Jun 12, 2007 at 01:05:44AM -0400, linux@xxxxxxxxxxx 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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