Automatic back annotation of a functional definition of an integrated circuit design based upon physical layout
AssigneeInternational Business Machines Corporation
InventorsMark Fredrickson, Glen Handlogten, Chad McBride
Life of this patent
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Abstract
An apparatus, program product and method automatically back annotate a functional definition of a circuit design based upon the physical layout generated from the functional definition. A circuit design may be back annotated, for example, by generating a plurality of assignments between a plurality of circuit elements in the circuit design and a plurality of signals defined for the circuit design using a physical definition of the circuit design that has been generated from the functional definition, and modifying the functional definition of the circuit design to incorporate the plurality of assignments into the functional definition.
Claims25
A method of annotating a functional definition of a circuit design, the method comprising:
- using a physical definition of the circuit design that has been generated from the functional definition, generating a plurality of assignments between a plurality of circuit elements in the circuit design and a plurality of signals defined for the circuit design;
- and
- automatically modifying the functional definition of the circuit design to incorporate the plurality of assignments into the functional definition.
An apparatus, comprising:
- a processor;
- and
- program code configured to execute on the processor to annotate a functional definition of a circuit design by automatically modifying the functional definition of the circuit design to incorporate a plurality of assignments into the functional definition of the circuit design, wherein the plurality of assignments are generated using a physical definition of the circuit design that has been generated from the functional definition, and wherein the plurality of assignments define connections between a plurality of circuit elements in the circuit design and a plurality of signals defined for the circuit design.
A program product, comprising:
- program code configured to annotate a functional definition of a circuit design by automatically modifying the functional definition of the circuit design to incorporate a plurality of assignments into the functional definition of the circuit design, wherein the plurality of assignments are generated using a physical definition of the circuit design that has been generated from the functional definition, and wherein the plurality of assignments define connections between a plurality of circuit elements in the circuit design and a plurality of signals defined for the circuit design;
- and
- a computer readable medium bearing the program code.
A computer-implemented method of applying common changes to a plurality of records, the method comprising, for each of a plurality of records:
- storing the record in a selected data structure among a plurality of data structures;
- associating a stage identifier with the record in the selected data structure, wherein the stage identifier identifies an initial execution stage among a plurality of execution stages;
- processing the record by retrieving the record from the selected data structure and passing the record to the execution stage among the plurality of execution stages that is identified by the stage identifier for the record;
- and
- after processing the record, and until the stage identifier for the record indicates that the record has been processed by all of the execution stages, repeatedly:
- incrementing the stage identifier for the record to identify a next execution stage among the plurality of execution stages;
- storing the record back in the selected data structure;
- and
- repeating processing of the record by retrieving the record from the selected data structure and passing the record to the execution stage among the plurality of execution stages that is identified by the stage identifier for the record.
Dependencies are inferred from the claim text.