OpenSolaris

On 08/28/08 08:51 AM, Ferenc Rakoczi wrote:

<pre wrap="">The packed integer shift can help a lot, although I would not believe getting 5x out of just that can be achieved. </pre>

Depends on baseline :-)

But seriously, I would agree. For something like AES-CBC its difficult to get 5X over an optimized implementation even using the Intel AES-NI instructions (for ECB, or CTR the gains are likely much bigger).

-Lawrence

<pre wrap="">I don't know if they also have a 128-bit AND instruction (or a similar packed AND), but if they do, a combination of that with this new packed shift would go a long way. Ferenc On 08/26/08 17:01, Darren J Moffat wrote: </pre>

<pre wrap="">An interesting thread to follow on cryptography@ ... -------- Original Message -------- Subject: 5x speedup for AES using SSE5? Date: Sat, 23 Aug 2008 14:00:44 +0100 From: Paul Crowley <paul at ciphergoth dot org> To: cryptography at metzdowd dot com http://www.ddj.com/hpc-high-performance-computing/201803067 In the above Dr Dobb's article from a little over a year ago, AMD Senior Fellow Leendert vanDoorn states "the Advanced Encryption Standard (AES) algorithm gets a factor of 5 performance improvement by using the new SSE5 extension". However, glancing through the SSE5 specification, I can't see at all how such a dramatic speedup might be achieved. Does anyone know any more, or can anyone see more than I can in the spec? http://developer.amd.com/cpu/SSE5/Pages/default.aspx </pre>

<pre wrap=""><!---->_______________________________________________ crypto-discuss mailing list crypto-discuss at opensolaris dot org http://mail.opensolaris.org/mailman/listinfo/crypto-discuss </pre>

<pre class="moz-signature" cols="72">-- Lawrence Spracklen Architecture Technology Group http://blogs.sun.com/sprack </pre>