Full Flow

The paper describes COmPOSER conceptually as hybrid analytical sizing, primitive block layout generation, layout synthesis, and post-layout verification. The public repo exposes the synthesis side of that architecture through composer.sh and the stage scripts.

Main Driver

./composer.sh
./composer.sh <config.json>
./composer.sh <config.json> placement
./composer.sh <config.json> only routing

Recognized Steps

sizing
parse
placement
routing_inputs
routing

What Each Step Does

Step	Action
`sizing`	Runs stage 1 sizing and maps the selected values into the sized netlist
`parse`	Parses the sized netlist, generates primitive layouts, and exports stage 2 JSON
`placement`	Runs the Gurobi-based placer and creates placement JSON and placement GDS
`routing_inputs`	Converts primitive GDS files into LEF and combines them for routing
`routing`	Runs detailed routing, routed GDS assembly, and PDN generation

Paper Mapping

Paper Stage 1 maps mostly to sizing
Paper Stage 2 maps mostly to parse
Paper Stage 3 maps mostly to placement, routing_inputs, and routing
Paper Stage 4 is the verification loop discussed in the paper, beyond the open synthesis scripts bundled here