[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 #20 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Jacob Lifshay from comment #18)

> you got them mixed up. binary gf add is xor. prime gf add is integer
> addition followed by subtracting the prime if the sum is too big.

i'm glad you're on this, now you see why it takes me so long, i
constantly get things inverted.

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