yosys
https://github.com/cliffordwolf/yosys
C++
Yosys Open SYnthesis Suite
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- Issues
- read_liberty: only mark cells as abc9 boxes when timing is imported
- read_liberty: don't mark input-less cells as boxes
- Update ABC as per 2026-09-21
- abc new tests [sc-919]
- abc_new: clear exe options on each invocation
- portarcs: avoid dividing by zero with zero delays
- aiger2: keep $scopeinfo through mapping_prep
- add `MUX32` cells
- Keep keep wires in abc.
- Docs
- C++ not yet supported