Date: Wed, 11 Mar 2015 23:20:34 +0100 From: magnum <john.magnum@...hmail.com> To: john-dev@...ts.openwall.com Subject: Re: bitslice MD*/SHA*, AVX2 On 2015-03-11 23:07, Solar Designer wrote: > On Wed, Mar 11, 2015 at 10:45:19PM +0100, magnum wrote: >> On 2015-03-11 22:21, Solar Designer wrote: >>> BTW, it appears that we don't currently use this optimization. Not even >>> in the copy of my portable MD5 implementation in JtR, which I've since >>> updated to include this optimization here: >>> >>> http://openwall.info/wiki/people/solar/software/public-domain-source-code/md5 >>> >>> In my testing, this might not be beneficial on 2-operand archs such as >>> plain x86, but it should be on 3-operand archs such as AVX. So we >>> should update the code in sse-intrinsics.c, and benchmark. And we should >>> update the plain C code anyway, such as for non-x86 archs (which are >>> mostly 3-operand RISC). >>> >>> magnum, Jim? >> >> Yeah... unless we have some GSoC candidate wanting to show his/her >> teeth? That would be a good start! > > OK, I don't mind keeping this on hold until GSoC student application > period ends. Would you track it, so it doesn't get forgotten in case no > GSoC candidate takes care of it? OK. BTW I updated the C code in Jumbo just now. I will have a look at some OpenCL formats too and see what they look like. magnum
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