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Message-ID: <CABob6irHXQsc_TsaBDp5G3MeOrWVNy2Pb2DyA5cx+jnsGrPq+A@mail.gmail.com>
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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