yosys
https://github.com/cliffordwolf/yosys
C++
Yosys Open SYnthesis Suite
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- Issues
- opt_dff → opt_clean cant work
- opt_dff leaves conflicting init attributes on aliased DFF outputs
- Name conflict when using labels inside generate blocks with read_verilog
- opt_ffinv crashes with std::out_of_range when a multi-bit $not is connected to a 1-bit FF
- opt_ffinv: only treat single-bit $not/$_NOT_ as inverters
- peepopt: reassociate multiply-add chains for DSP inference [sc-814]
- abc_new crashes in wrapped operator flow
- Gowin SPX9 BSRAM returns wrong synchronous-read data when read output is cleared while idle
- Fails to substitute module code for instance in particular situations
- Add AI policy
- Docs
- C++ not yet supported