[Libre-soc-dev] FFT, DCT, REMAP

[Luke Kenneth Casson Leighton]

On 6/22/21, Luke Kenneth Casson Leighton <lkcl at lkcl.net> wrote:

> the question is, then, how to work out which elements from the batches
> need to be part-loaded?

oh.

errr...
https://en.wikipedia.org/wiki/File:DIT-FFT-butterfly.png

apparently it's that simple :)

* even loads from the concatenation of the two batches into the first
* odd loads into the second
* sequential from there.

nothing in that needs complexity at all, or any special REMAP modes,
it can be done easily right now.

l.