[Libre-soc-isa] [Bug 701] document Matrix REMAP in SVP64

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=701

--- Comment #7 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Andrey Miroshnikov from comment #6)

> Thanks, I found the optional features listed on pages x-xiii.

we are permitted to add any instruction that is not in one of
those "all-or-nothing" optional subsets. MMA is an example
of one of those "all-or-nothing" subsets.

whilst good that you raised it, do not spend further time on this. it's in
microwatt, therefore we include it. that's all there is to it. end of the
story.
https://github.com/antonblanchard/microwatt/blob/63d4553faeea897926f89eb7486dd991cd9e83c8/decode1.vhdl#L246

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