Subject: Re: [boost] Boost SIMD beta release
From: Joel Falcou (joel.falcou_at_[hidden])
Date: 2012-12-20 13:25:48
Le 20/12/2012 19:12, Dave Abrahams a écrit :
> on Thu Dec 20 2012, Joel Falcou <joel.falcou-AT-gmail.com> wrote:
>> Maybe we should have a simd::unaligned_input_iterator and/or make
>> simd::transform accept non aligned data. Note that on any pre-Nehalem
>> CPU, the unaligned load will be horrendsously slow.
> It's probably a bit late to bring this up, but did you consider a design
> that uses something like Matt Austern's segmented iterator concept
> (http://lafstern.org/matt/segmented.pdf) and imposes a hierarchical view
> over regular memory that segments on aligned memory regions?
We did but we never had time to implement somethign like that.
The best we had was a simd::transform that handled the epi/prolog
But it's maybe the best stuff to have yes.