Date: Tue, 22 Oct 2013 04:08:41 +0200 From: Lukas Odzioba <lukas.odzioba@...il.com> To: john-dev@...ts.openwall.com Subject: Re: OpenCL vectorizing how-to. 2013/10/21 magnum <john.magnum@...hmail.com>: > One thing I can't understand is why pre-vectorized code with the correct > width is not used "as-is" by these compilers. Apparently the compiler first > scalarizes it and then re-vectorizes it - with very poor results, at least > on Well. OTOH this isn't a problem now that we can supply the requested > [lack of] width. "(...)We're likely to generate better code(...)" :) I guess better is not necessarily faster :) http://www.youtube.com/watch?feature=player_detailpage&v=QsoLyvvhRuc#t=853
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