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Message-ID: <20130725152218.GA15021@openwall.com>
Date: Thu, 25 Jul 2013 19:22:18 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: Parallella: bcrypt
On Thu, Jul 25, 2013 at 05:13:09PM +0200, Katja Malvoni wrote:
> On Thu, Jul 25, 2013 at 4:38 PM, Solar Designer <solar@...nwall.com> wrote:
> > BTW, you may try putting the most frequently used variables into
> > registers r0 through r7, since instructions with only those low-numbered
> > registers are smaller (16 bits).
>
> I tried it, didn't change speed, still 976 c/s.
It was not supposed to change speed (directly). Rather, it was supposed
to reduce code size, which would let us do more interleaving and
unrolling, and may help us achieve greater speed (later) in this way.
You may check the compiled code before/after this change with "size" and
"objdump -d". Did some instructions change from 32 to 16 bits?
Alexander
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