Distributing spare latch circuits in integrated circuit designs
First Claim
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1. A method implemented by a computer, comprising:
- determining, using the computer, placements of logic blocks and local clock buffers in an integrated circuit (IC) design;
determining, using the computer, an allocation of spare latch circuits to the logic blocks in the IC design based on corresponding design input factors;
determining, using the computer, a correspondence between the local clock buffers and logic blocks in the IC design; and
based on the determined correspondence between the local clock buffers and the logic blocks, placing, the number of the spare latch circuits in the IC design in accordance with the determined allocation of the spare latch circuits, wherein the placing distributes the number of the spare latch circuits among the local clock buffers.
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Abstract
Methods for allocating spare latch circuits to logic blocks in an integrated circuit design are provided. A method includes determining logic blocks in the design and determining and determining an allocation of spare latch circuits among the logic blocks based on respective attributes of the logic blocks. The method further include placing the spare latch circuits in the design in accordance with the determined allocation based on local clock buffers corresponding with the logic blocks.
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Citations
12 Claims
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1. A method implemented by a computer, comprising:
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determining, using the computer, placements of logic blocks and local clock buffers in an integrated circuit (IC) design; determining, using the computer, an allocation of spare latch circuits to the logic blocks in the IC design based on corresponding design input factors; determining, using the computer, a correspondence between the local clock buffers and logic blocks in the IC design; and based on the determined correspondence between the local clock buffers and the logic blocks, placing, the number of the spare latch circuits in the IC design in accordance with the determined allocation of the spare latch circuits, wherein the placing distributes the number of the spare latch circuits among the local clock buffers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A computer program product comprising a computer usable storage device having a computer readable program stored in the computer usable storage device, wherein the computer readable program, when executed on a computing device, is operable to cause the computing device to:
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determine logic blocks in an integrated circuit (IC) design, the logic blocks having respective attributes; determine respective spare latch design factors of the logic blocks based on a combination of the respective attributes of the logic blocks; determine, based on the respective spare latch design factors of the logic blocks, a relative probability of design change for each of the logic blocks; and determine, based on the relative probability of design change for each of the logic blocks, a number of spare latch circuits to allocate among the logic blocks, wherein a logic block having a greater probability of design change is allocated a greater proportion of a total number of available spare latch circuits relative to a logic block having a lower probability of design change. - View Dependent Claims (11)
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12. A computer program product comprising a computer usable storage device having a computer readable program stored in the computer usable storage device, wherein the computer readable program, when executed on a computing device, is operable to cause the computing device to:
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determine logic blocks in an integrated circuit (IC) design; determine, based on respective spare latch design factors of the logic blocks, a relative probability of design change for each of the logic blocks; and determine, based on the relative probability of design change for each of the logic blocks, a number of spare latch circuits to allocate among the logic blocks, wherein a logic block having a greater probability of design change is allocated a greater proportion of a total number of available spare latch circuits relative to a logic block having a lower probability of design change, wherein the computer readable program is operable to determine the relative probability of design change by; determining a weighted average of the attributes for each of the logic blocks; and normalizing each of the weighted averages across the logic blocks.
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Specification