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Date: Mon, 23 Jul 2012 13:13:08 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: Atom: bf P1 asm results
On Mon, Jul 23, 2012 at 09:57:22AM +0200, Frank Dittrich wrote:
> On 07/09/2012 01:31 AM, Solar Designer wrote:
> > Also, if you omit -march=native, does it still include any Atom-specific
> > defines on your system?
>
> Without --march=native, atom doesn't appear among the definitions, just
> #define __i386 1
> #define __i386__ 1
> #define __i686 1
> #define __i686__ 1
> #define __pentiumpro 1
> #define __pentiumpro__ 1
> #define i386 1
>
> With --march=native, the i36 definitions remain, but i686 and pentiumpro
> disappear.
i686 disappearing with -march=native on Atom sounds like a gcc bug to me.
Maybe check if it's present on a clean gcc build (not a Linux distro's)
and report it upstream if so. Also check for it on non-Atom (but also a
32-bit system).
Alexander
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