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Date: Fri, 15 Jun 2012 20:02:42 +0200
From: Tavis Ormandy <taviso@...xchg8b.com>
To: john-dev@...ts.openwall.com
Subject: Re: Re: [patch] optional new raw sha1 implemetation
"jfoug" <jfoug@....net> wrote:
> On Friday, June 15, 2012 11:45 AM Tavis Ormandy wrote
> > On Fri, Jun 15, 2012 at 04:54:15PM +0200, Tavis Ormandy wrote: ... I
> > made some slight adjustments to the scheduling, please use the attached
> > version instead.
>
> Travis,
>
> Please change this:
>
> - #if defined(__SSE4_1__) && defined(__GNUC__) && defined(__linux__) + #if
> defined(__SSE4_1__) && defined(__GNUC__) && (defined(__linux__) || defined
> (__CYGWIN32__))
>
> I have built on cygwin (with -msse4 instead of -msse2), and it builds just
> fine. It is not faster (about 5% slower), but builds fine, and tests fine.
>
> Also, this should be changed. This is the proper benchmark setting for a
> non-salted format:
>
> - .benchmark_length = 1, + .benchmark_length = -1,
>
> With that benchmark testing changed, my cygwin build now benches this new
> code about 5% faster than the raw-sha1 from bleeding.
>
Ahh, I guess I didn't understand that parameter. Thanks!
5% improvement is nice, but I'm dissapointed it's not higher. Could you send
me a .o file? I would like to disassemble it and see where GCC goes wrong,
hopefully there's a simple way to fix it.
Version 3 attached.
Tavis.
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