Chip sizing for hierarchical designs
First Claim
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1. A method of apportioning increased area of a parent cell to child macro cells of a hierarchical integrated circuit design, comprising the steps of:
- a) determining parent growth factors in X and Y directions for the parent cell;
b) determining child growth factors in X and Y directions for the child cell according to a geometric progression based on the growth factors of the parent cell.
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Abstract
A method for resizing the macro cells'"'"' boundaries of an integrated chip is disclosed and that becomes effectual after the initial floorplanning process has been completed. The method of the present invention apportions any excess area that is freed-up after the initial floorplanning process by altering the sizes or dimensions of the macro cell within the hierarchy of the integrated circuit in such a manner that the fractional change in the percentage occupancy is substantially constant among all macro cells at all hierarchy levels.
15 Citations
14 Claims
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1. A method of apportioning increased area of a parent cell to child macro cells of a hierarchical integrated circuit design, comprising the steps of:
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a) determining parent growth factors in X and Y directions for the parent cell; b) determining child growth factors in X and Y directions for the child cell according to a geometric progression based on the growth factors of the parent cell. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A program storage device readable by a machine, tangibly embodying a program of instructions executable by the machine to perform the method steps for apportioning increased area of a parent cell to child macro cells of a hierarchical integrated circuit design, said method steps comprising:
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a) determining parent growth factors in X and Y directions for the parent cell; b) determining child growth factors in X and Y directions for the child cell according to a geometric progression based on the growth factors of the parent cell. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification