Automatic clock tree routing rule generation

摘要

Systems and techniques are described for automatically generating a set of non-default routing rules for routing a net in a clock tree based on one or more metrics. The metrics can include a congestion metric, a latency metric, a crosstalk metric, an electromigration metric, and a clock tree level. Next, the embodiments can generate the set of non-default routing rules for routing the net based on one or more metrics. A routing rule can specify how wide the wires are supposed to be and how far apart adjacent wires are to be placed. A non-default routing rule can specify a wire width that is different from the default width and/or specify a spacing (i.e., the distance between two wires) that is different from the default spacing.

主权项

1. In an electronic design automation (EDA) tool, a computer-implemented method for generating a set of non-default routing rules for routing a clock tree, the computer-implemented method comprising:
determining, by using one or more processors, a congestion metric for a net, wherein the congestion metric corresponds to an amount of routing congestion in proximity to the net; determining a clock tree level for the net, wherein a root of the clock tree corresponds to a highest clock tree level; and in response to determining that the congestion metric indicates that the net is not in a high congestion region, generating a non-default routing rule that uses a width value and a spacing value based on the clock tree level, wherein greater width values and spacing values are used at higher clock tree levels.