This is definitely WIP.

A Python platform for experiments with Yosys, ABC and OpenSTA

We use the very nice Python package for parsing Liberty files liberty-parser

Note that we currently use forked version of ABC and that provides a Python wrapper. We also use a Yosys plugin orlo that must be installed first and also a working version of OpenSTA must accessable

The Yosys Python wrapper module, must be installed and visible to Python. You will have to build Yosys with ENABLE_PYOSYS := 1 (In order to do this you will need to have libboost-python-dev installed.) This will make the libyosys.so library. You can use the Yosys Makefile to install it, but I prefer to do that manually in my local anaconda3 tree. If you want to do that, then in the directory ~/anaconda3/lib/python3.8/site-packages make a directory named pyosys. Copy libyosys.so (should be in the top level Yosys directory after a successful build) to that directory. Also copy the file __init__.py from the yosys/misc directory to that location as well. The Yosys vendored abc, now named yosys-abc, needs to be copied to the ~/anaconda3/bin directory, if you intend to use that. Finally, you need to have the contents of yosys/share copied to a system directory /usr/local/share/yosys. See the Yosys docs for more info.

The above mentioned forked version of ABC has a build script called wrapper.sh which will also install the Python wrapper for ABC.

OpenSTA just needs to be on your path and we only shell out to it.