Delay calculations
- get_cells *
 - get_pins -of_objects instance_name
 - report_delay_calculation -from ABC/a -to ABC/y
 
swapping from LVT/HVT to HVT/LVT
- get_cells *
 - get_lib_cells -of_objects instance_name
 - size_cell instance_name lib_name lib_name
 - get_lib_cells -of_objects instance_name
 
how to calculate the gate count
- gate_count = (total area/Nand gate area)
 
How to find the lib_cells of a cell
- get_lib_cells */*DEL*
 - all_macro_cells
 - size_of_collection [all_macro_cells]
 
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