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Cell placement method and apparatus for integrated circuit and storage medium having cell placement program for integrated circuit stored thereon
Cell placement method and apparatus for integrated circuit and storage medium having cell placement program for integrated circuit stored thereon
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机译:用于集成电路的单元放置方法和装置以及存储有其上用于集成电路的单元放置程序的存储介质
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摘要
The invention provides a cell placement method and apparatus wherein an area for cell's placement is assured to place cells as many as possible to be placed efficiently on a single chip and a storage medium on which a cell placement program which allows such placement is stored. In the cell placement method and apparatus, in order to design an integrated circuit having a plurality of routing layers, when to place cells in a situation wherein a wire is already routed prior to the placement of the cells is present, placement of each of the cells at a position at which the cell overlaps with the already routed wire is permitted unless a wiring pattern in the cell and the already routed wire overlap with each other in a same routing layer. The invention is applied, in designing an integrated circuit (LSI, VLSI, ASIC or the like) having a plurality of routing layers, for example, a gate array to placement of cells on a chip in a state wherein an already routed wire such as a bulk power supply wire or a clock signal wire routed prior to the placement of the cells is present.
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