[Libre-soc-bugs] [Bug 745] OP_TERNLOG instruction

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Thu Mar 9 08:21:36 GMT 2023


--- Comment #65 from Jacob Lifshay <programmerjake at gmail.com> ---

Author: Jacob Lifshay <programmerjake at gmail.com>
Date:   Thu Mar 9 00:10:47 2023 -0800

    add experiment for seeing if changing ternlogi to have 7-bit immediate
could even work

    turns out, it probably can. I wrote a script that looks for possible
    functions and filled in one I found.

assuming I counted correctly and the function I found actually is correct, it
should only need 9 xor gates! so, imho this is trivial to decode even if we
(unwisely) decided to mush it into the decoder instead of the ALU.

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