Presentation
PUFFER: A Routability-Driven Placement Framework via Cell Padding with Multiple Features and Strategy Exploration
DescriptionPlacement is a critical challenge in VLSI physical design, especially for routability optimization. This paper proposes a placement framework, called PUFFER, to optimize routability by cell padding and strategy exploration. We first estimate congestion by imitating routing detours and clustered cell spreading. Then we calculate cell padding based on multiple features inspired by the characteristics of convolutional and graph neural networks. Besides, we apply a Bayesian-based method to conduct strategy exploration. Experiments on industrial benchmarks show that our algorithm achieves better routability on average, compared with a commercial tool and RePlAce, with a 2x speedup over the commercial tool.
Event Type
Research Manuscript
TimeWednesday, July 12th3:55pm - 4:10pm PDT
Location3002, 3rd Floor
EDA
Physical Design and Verification