Re: [Boost-bugs] [Boost C++ Libraries] #9237: Vectorizer friendly code

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #9237: Vectorizer friendly code
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-10-11 17:45:35

#9237: Vectorizer friendly code
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  Reporter:  psiha             |      Owner:  johnmaddock
      Type:  Bugs              |     Status:  new
 Milestone:  To Be Determined  |  Component:  multiprecision
   Version:  Boost 1.54.0      |   Severity:  Optimization
Resolution:                    |   Keywords:
-------------------------------+----------------------------

Comment (by johnmaddock):

 Can you please explain what you had in mind here?  Note that cpp_int's are
 not simply arrays, so cannot be passed by value using a {{{__vectorcall}}}
 as far as I can see.

 Use of builtin vector types might be interesting, but the only operations
 I can see being easily vectorised are the bitwise operations?  I suspect
 the problems may outweigh the benefits here: for example gcc only supports
 array sizes that are powers of 2, I'm not certain the arrays support
 64-bit chunks either...

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/9237#comment:1>
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