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    • 7. 发明授权
    • Method and system for optimized circuit autorouting
    • 优化电路自动布线的方法和系统
    • US07620922B1
    • 2009-11-17
    • US11556999
    • 2006-11-06
    • Ken WadlandRichard WoodwardRandall LawsonGreg Horlick
    • Ken WadlandRichard WoodwardRandall LawsonGreg Horlick
    • G06F17/50G06F9/45
    • G06F17/5077
    • An approach is provided for selectively optimizing a circuit design, including generating a circuit routing solution according to a plurality of constraints for parametric resources of the circuit design, with the constraints being defined respectively by a plurality of corresponding constraint instances. Each constraint instance variably indicates an effective constraining limit and degree of consumption for at least one of the parametric resources. At least one of the constraints is selectively adjusted by a predetermined over-constraining amount, and the circuit routing solution is preliminarily modified by applying at least one routing action selected responsive to the constraint adjustment. The potential impact upon constraint compliance is evaluated, including generating a relative cost measure for the preliminary modification of the circuit routing solution, based at least partially upon each of the constraint instances. Thereafter, the preliminary modification of the circuit routing solution is either discarded or accepted responsive to the evaluation.
    • 提供了一种用于选择性地优化电路设计的方法,包括根据电路设计的参数资源的多个约束生成电路布线解决方案,其中约束分别由多个相应的约束实例定义。 每个约束实例可变地指示至少一个参数资源的有效约束极限和消耗程度。 通过预定的过约束量选择性地调节约束中的至少一个,并且通过应用响应于约束调整选择的至少一个路由动作来初步修改电路路由解决方案。 评估对约束约束的潜在影响,包括至少部分地基于每个约束实例来生成用于电路路由解决方案的初步修改的相对成本度量。 此后,响应于评估,电路布线解决方案的初步修改被丢弃或接受。