Shaping integrated with power network synthesis (PNS) for power grid (PG) alignment

摘要

Embodiments are described in which shaping is integrated with power network synthesis (PNS) for power grid (PG) alignment. Specifically, some embodiments create placement constraints based on the PG that is expected to be created by PNS, and then perform shaping (or perform legalization) on the circuit design based on the placement constraints. This ensures that the physical partitions (e.g., instances of multiply-instantiated-blocks) are aligned with the power grid during shaping.

主权项

1. A method for performing shaping on a circuit design, the method comprising:
receiving a set of power grid (PG) strategies that specifies a structure of a PG that is to be used in the circuit design; creating a set of placement constraints based on the set of PG strategies, wherein the set of placement constraints comprises a placement constraint that requires a physical partition to be aligned with the structure of the PG, and wherein at least one PG wire passes through the physical partition; performing, by computer, shaping on the circuit design using the set of placement constraints; and after performing said shaping on the circuit design, creating the PG in the circuit design based on the set of PG strategies, wherein said creating the PG in the circuit design comprises pushing the at least one PG wire into the physical partition.