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Date: Thu, 25 Jul 2013 19:39:32 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: Parallella: bcrypt
On Thu, Jul 25, 2013 at 05:32:17PM +0200, Katja Malvoni wrote:
> On Thu, Jul 25, 2013 at 5:22 PM, Solar Designer <solar@...nwall.com> wrote:
>
> > You may check the compiled code before/after this change with "size" and
> > "objdump -d". Did some instructions change from 32 to 16 bits?
>
> Only mov instructions, others are 32 bits. Size before change is:
>
> text data bss dec hex filename
> 7866 4120 16 12002 2ee2
> parallella_e_bcrypt.elf
>
> and after change it's:
>
> text data bss dec hex filename
> 7858 4120 16 11994 2eda
> parallella_e_bcrypt.elf
I think we can do better - that is, have more 16-bit instructions.
In order for an instruction to be 16-bit, all of the registers used in
it need to be in the low range.
This is not terribly important, but it can be handy when we add
interleaving.
Alexander
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