Subject: Re: [boost] Boost SIMD beta release
From: Mathias Gaunard (mathias.gaunard_at_[hidden])
Date: 2012-12-25 10:16:57
On 25/12/12 15:43, Peter Dimov wrote:
> Mathias Gaunard wrote:
>> The shifted iterator and the shifted load allow to do aligned loads if
>> you statically know the misalignment of the memory.
>
> Does this have any performance advantage over just using an unaligned
> load? I'd expect the microcode to do whatever the shifted load does, but
> I haven't measured it.
The shifted load statically knows the alignment, unaligned loads do not.
Note that the switch is outside of the loop, not for each load.