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Date: Sun, 8 Jul 2012 13:11:07 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: Between 1.7.9-jumbo-3 and 1.7.9-jumbo-4 performance of --format=bf dropped by more than 20%
Frank -
On your Atom, can you try setting BF_ASM 1, BF_X2 0 (the combination
that you previously determined to be fastest, right?), but also patch
this line in x86.S:
movl $BF_body_generic,BF_body
to read:
movl $BF_body_P1,BF_body
That is, use the original Pentium's asm code for Blowfish.
Per your results for MD5, chances are that this will result in even
faster Blowfish speed than what you had observed before. If so, we'll
need to add Atom detection to x86.S.
Thanks,
Alexander
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