Subject: Re: [boost] Boost SIMD beta release
From: Mathias Gaunard (mathias.gaunard_at_[hidden])
Date: 2012-12-20 13:26:35
On 20/12/12 19:12, Dave Abrahams wrote:
>
> 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?
The code needs to be the same for all segments in that model, unless
I've missed something.