[Libre-soc-dev] DCT/FFT augmentations

Luke Kenneth Casson Leighton lkcl at lkcl.net
Thu Jun 24 21:41:11 BST 2021

argh, ok, the attempt to add multiple decoders (one for SVP64 bitrev
LDs overrides, one main one) isn't going to work.

instead, sigh, a more complex system is needed where rows with the
same opcode are merged into a dictionary, where the keys are a set of

from those "CONDITIONs" a new switch statement is created *right* at
the leaf nodes of the decoder.

case opcode 32:
  switch CODITIONS
    case bitrev:
      return svp64 row
    case !bitrev:
      return v3.0b

what could be done instead is to have extra bits on the end of the
opcode.  bit 33, bit 44, etc.

it is the same principle.


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