Re: [boost] Accelerating algorithms with SIMD - Segmented iterators and alternatives

Subject: Re: [boost] Accelerating algorithms with SIMD - Segmented iterators and alternatives
From: DE (satan66613_at_[hidden])
Date: 2010-10-12 14:21:04

on 12.10.2010 at 21:38
 joel falcou wrote :
> When no SSEx stuff are enabled, pack<T,N> falls back to boost::array
> emulation.
> If you wan to ship code for various SSex flavor, just make various 
> compialtion fo your kernel code
> then dynamically laod the correct one. There is no way you can check at
> runtime before calling EVERY
> function, this is far too costly.

an idea immediately arises in my mind: what if it could be possible to
force a particular backend e.g. sse2 and make it propagate down the
call stack? this way you write generic code once and are able to
(pre)compile for (expected) platforms/technologies
then you just switch once depending on some circumstances and call the
appropriate instance (say sse2 forced)
at least this way you write the source once and possibly don't rewrite
it for every circumstance

-- 
Pavel
P.S.
if you notice a grammar mistake or weird phrasing in my message
please point it out