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Method and system for layout design of integrated circuits with a data transferring flow

  • US 5,239,465 A
  • Filed: 05/07/1991
  • Issued: 08/24/1993
  • Est. Priority Date: 10/11/1988
  • Status: Expired due to Fees
First Claim
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1. A layout method performed by an automatic layout system, the method comprising the steps of:

  • deciding, in said automatic layout system, a plurality of placement sequences for respective sets of data system elements through which data flows inside a logic circuit to be laid out on the basis of basic connection information being preliminarily determined on the basis of a basic information among data system logic elements in accordance with a flow of non-control data through said data system logic elements;

    deciding, in said automatic layout system, a second sequence which comprises said sets of data system elements in said logic circuit to be laid out, on the basis of connecting relations among the sets of data system elements, said connecting relations being determined in accordance with said flow of non-control data; and

    ,deciding, in said automatic layout system, an initial placement positioning of each of said data system logic elements by determining an order of said data system logic elements in said second sequence.

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