[Libre-soc-bugs] [Bug 653] investigate FFT, DCT, etc for REMAP in SVP64

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=653

--- Comment #15 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
    result[0 : : 2] = alpha
    result[1 : : 2] = beta
    result[1 : n - 1 : 2] += beta[1 : ]

in theory this can be in-place if the bitreversing has
already been done.  this requires DOUBLE bitreversing:
the data to be LD-bitreversed AND the cos schedule
to be bitreversed, result is that the cos multiplies
end up in the correct indices.

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