[Libre-soc-bugs] [Bug 782] add galois field bitmanip instructions

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=782

--- Comment #54 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Jacob Lifshay from comment #51)

> we'd probably want to name it cldiv and clrem, since that way it matches
> with clmul. they would be polynomial divmod, where the polynomial
> coefficients are GF(2).

that makes sense. like it.

> gfb implies GF(2^n), which depends on the reducing polynomial in order to
> make sense.
> > 
> > can you update comment #0 so i have a full list? i'll then double-check
> > the wiki page for opcode allocations.
> 
> yeah. i'll leave the gfp (prime) list un-elaborated for now.

do include them i need the names and qty.  and basic descriptions.

urr gfbmadd is 4op which are in short supply.  have to lose Rc=1
to get them to fit.

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