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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