[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 #34 from Jacob Lifshay <programmerjake at gmail.com> ---
(In reply to Luke Kenneth Casson Leighton from comment #33)
> fantastic. do you have an indication of the gate count (and LUT4 resources,
> synth_ecp5)?

I haven't checked, but I expect the additional resources required to be on the
order of 500 2-in muxes (384 (6 layers * 64 bits) for the grev itself, the rest
for misc routing in/out)

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