@@ -23,7 +23,7 @@ The following cartoon was recently provided by a Google engineer to explain the
Each group is recorded in the “.fix file” that is part of the input to the hMETIS hypergraph partitioner when the gate-level netlist is clustered into soft macros.
## **How Grouping Scripts Are used**
We provide [(an example)](https://github.com/TILOS-AI-Institute/MacroPlacement/blob/main/CodeElements/Grouping/test/test.py) about the usage of our grouping script.
We provide [(an example)](https://github.com/TILOS-AI-Institute/MacroPlacement/blob/main/CodeElements/Grouping/test/test.py) about the usage of our grouping scripts.
Basically our grouping scripts take follows as inputs: (i) [(setup_file)](https://github.com/TILOS-AI-Institute/MacroPlacement/blob/main/CodeElements/Grouping/test/setup.tcl)
including enablement information (lefs/libs), synthesized gate-level netlist (*.v), def file with placed IOs (*.def); (ii) n_rows and n_cols determined by the [(Gridding)](https://github.com/TILOS-AI-Institute/MacroPlacement/tree/main/CodeElements/Gridding) step; (iii) K_in and K_out parameters; (iv) global_net_threshold for ignoring global nets. If a net has more than global_net_threshold instances, we ignore such net when we search "transitive" fanins and fanouts. After
running grouping scripts, you will get two files *.fix and *.fix.old. The ".fix.old" file contains the IOs or macros in the corresponding group while *.fix file only contains standard cells in each group.
