Date: Mon, 28 Jun 2010 13:33:21 +0400 From: Solar Designer <solar@...nwall.com> To: john-users@...ts.openwall.com Subject: Re: faster DES on Atom A minor correction: On Mon, Jun 28, 2010 at 01:15:55PM +0400, Solar Designer wrote: > ... when working on this code in 2006 I only encountered CPUs that > executed both SSE and SSE2 versions of the code at the same speed (AMD > CPUs) and those that executed the SSE2 code much faster (Intel CPUs), > which is why the decision to go with SSE2 only was made. I think I managed to recall the specific CPU classes mentioned in braces above incorrectly. Plain SSE only performed well on Intel Pentium 4 (and on P4'ish Xeon and Celeron). Both AMD and non-P4 Intel CPUs ran SSE2 faster than plain SSE (speaking of bitwise ops only, indeed). Alexander
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