On Sunday, 9 October 2016 at 08:39:57 UTC, Nicholas Wilson wrote:
On Sunday, 9 October 2016 at 05:34:06 UTC, Ilya Yaroshenko
wrote:
On Sunday, 9 October 2016 at 05:21:32 UTC, Manu wrote:
On 9 October 2016 at 14:03, Nicholas Wilson via Digitalmars-d
<digitalmars-d@puremagic.com> wrote:
[...]
Well the trouble is the lambda that you might give to 'map'
won't work anymore. Operators don't work on batches, you need
to use a completely different API, and I think that's
unfortunate.
Could you please give an example what type of operation should
be vectorized?
anything that is able to be. Given that
ElementType!InBatchesOfN are a static array
of ElementType!(R), the compiler can* (assuming no branching
and anything else that impedes vectorisation) combine most
expressions into equivalent vector instruction.
This approach might not work so well for colours as is but
should work if we "transpose" the colour i.e. rgbargbargbargba
-> rrrrggggbbbbaaaa and then transpose it back.
*I know this is the sufficiently intelligent compiler argument
static foreach can help for static arrays. For example, ndslice
uses static foreach a lot. mir.ndslice.algorithm allows to
perform vectorized operations. Some conversion algorithms for
ndslices will be added to Mir or DCV. Please open a pool request
or fill an issue.
