Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
df74c80973
This PR adds a bitblasting circuit for `BitVec.cpop` with a divide-and-conquer for a parallel-prefix-sum. This is the [most efficient circuit we could fine](https://docs.google.com/spreadsheets/d/1dJ5uUY4-eWIQmMjIui3H4U-wBxBxy-qYuqJZFZD1xvA/edit?usp=sharing), after comparing with Kernighan's algorithm and with the intuitive addition circuit. --------- Co-authored-by: Henrik Böving <hargonix@gmail.com> |
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