[libre-riscv-dev] old implementation of int to fp in custom cellular automata using golly

Jacob Lifshay programmerjake at gmail.com
Wed Jul 17 14:18:17 BST 2019

since attachments didn't seem to work, i put it on github:

On Wed, Jul 17, 2019, 06:10 Jacob Lifshay <programmerjake at gmail.com> wrote:

> I remembered that I had created a gate-level implementation of a
> sign-magnitude integer to ieee 754 32-bit float converter (in "int to
> fp.mc" in attached zip file).
> msb input is bottom left, msb output is bottom right.
> it doesn't use round-to-nearest (I think it truncates towards zero, but
> not sure)
> Thought you all might find that amusing/interesting.
> attaching zip file that works with latest version of golly.
> the cellular automaton rules are based on wires and 2-input 1-bit muxes.
> if you turn on cell icons in golly, the icons should help understanding
> what the different cell kinds do. alternatively, read the comments in the
> LogicWorld4.rule file.
> Jacob

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