[Libre-soc-bugs] [Bug 755] add grev instruction (OP_GREV)

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=755

--- Comment #53 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Jacob Lifshay from comment #52)
> The grev/gorc/etc. circuit (1/3 latency of grevlut and nearly just as
> flexible):
> https://libre-soc.org/openpower/sv/bitmanip/grev_gorc_design/

oo! oo! i'm so excited: a small modification to put in a *pair* of
LUTs (one for left, one for right) and i think we have the exact
same functionality.... perhaps not exactly the same.  i'll try
to code it up in a 2nd version of grevlut.py

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