iNO Function Documentation

Overview

NO stands for Netlist Optimization. Currently, iNO supports fanout optimization, which makes the net meet the maximum fanout constraint by inserting buffers.

iNO Usage Example

Users need to specify the maximum fanout constraint and the type of buffer used in the Config file. For example,

"insert_buffer": "LVTX_4",
"max_fanout": 30

1. Set the Config file in the Tcl file

run_no_fixfanout -config./iEDA_config/no_default_config_fixfanout.json

2. Use iEDA to run the tcl file

./iEDA -script./script/iNO_script/run_iNO_fix_fanout.tcl

Report Output

In the Config file, the report output path of the optimization result can be set:

"report_file": "path"

Example of fanout optimization report output:

[Result: ] Find 0 Net with fanout violation.
[Result: ] Insert 0 Buffers.