Priority based circuit synthesis

Patent metadata

Field	Value
Publication number	US-10133840-B2
Application number	US-201514958957-A
Country	US
Kind code	B2
Filing date	Dec 4, 2015
Priority date	Dec 4, 2015
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

A computer-implemented method includes receiving, with one or more processors, a text-based description of a logic circuit comprising a plurality of logic sub-circuits, determining within the text-based description, with one or more processors, a set of circuit priority indicators for a corresponding set of the logic sub-circuits, and synthesizing, with one or more processors, the logic circuit according to the set of circuit priority indicators to provide a synthesized circuit description. A corresponding computer program product and computer system are also disclosed herein.

First claim

What is claimed is:

1. A computer-implemented method comprising:
receiving, by one or more processor(s), a text-based description of a logic circuit comprising a plurality of logic sub-circuits, wherein the text-based description comprises hierarchical hardware description language statements that define the logic circuit and the plurality of logic sub-circuits;
determining within the text-based description, by the one or more processor(s), a set of circuit priority indicators that are explicitly indicated within the text-based description, for a corresponding set of the logic sub-circuits;
synthesizing, by the one or more processor(s), the logic circuit according to the set of circuit priority indicators to provide a synthesized circuit description without requiring, or waiting for, estimation of a circuit slack for any of the plurality of logic sub-circuits; and
fabricating the logic circuit using the synthesized circuit description wherein a circuit priority indicator is a function parameter.

2. The method of claim 1 , wherein the synthesized circuit description retains the circuit priority indicators.

3. The method of claim 2 , further comprising:
placing the logic circuit, by the one or more processor(s), according to the set of circuit priority indicators; and
routing, by the one or more processor(s), the logic circuit according to the set of circuit priority indicators.

4. The method of claim 1 , wherein synthesizing includes logical synthesis.

5. The method of claim 1 , wherein synthesizing includes physical synthesis.

6. The method of claim 1 , wherein a circuit priority indicator is a label or function parameter.

7. The method of claim 1 , wherein the synthesized circuit description comprises a gate level netlist or a transistor level netlist.

8. A computer program product comprising:
one or more computer readable storage media;
program instructions stored on the one or more computer readable storage media, the program instructions comprising instructions for causing one or more processor(s) to perform the following operations:
receiving, by the one or more processor(s), a text-based description of a logic circuit comprising a plurality of logic sub-circuits, wherein the text-based description comprises hierarchical hardware description language statements that define the logic circuit and the plurality of logic sub-circuits,
determining within the text-based description, by the one or more processor(s), a set of circuit priority indicators that are explicitly indicated within the text-based description, for a corresponding set of the logic sub-circuits,
synthesizing, by the one or more processor(s), the logic circuit according to the set of circuit priority indicators to provide a synthesized circuit description without requiring, or waiting for, estimation of a circuit slack for any of the plurality of logic sub-circuits; and
fabricating the logic circuit using the synthesized circuit description wherein a circuit priority indicator is a function parameter.

9. The computer program product of claim 8 , wherein the synthesized circuit description retains the circuit priority indicators.

10. The computer program product of claim 9 , wherein the program instructions include further instructions for causing the one or more computer processor(s) to perform the following operations:
placing the logic circuit according to the set of circuit priority indicators; and
routing the logic circuit according to the set of circuit priority indicators.

11. The computer program product of claim 8 , wherein synthesizing includes logical synthesis.

12. The computer program product of claim 8 , wherein synthesizing includes physical synthesis.

13. The computer program product of claim 8 , wherein a circuit priority indicator is a label.

14. The computer program product of claim 8 , wherein a circuit priority indicator is a function parameter.

15. The computer program product of claim 8 , wherein the synthesized circuit description comprises a gate level netlist or a transistor level netlist.

16. A computer system comprising:
one or more processor(s);
one or more computer readable storage media;
program instructions stored on the one or more computer readable storage media for execution by at least one of one or more processor(s), the program instructions comprising instructions for causing the one or more processor(s) to perform operations including the following:
receiving, by the one or more processor(s), a text-based description of a logic circuit comprising a plurality of logic sub-circuits, wherein the text-based description comprises hierarchical hardware description language statements that define the logic circuit and the plurality of logic sub-circuits,
determining within the text-based description, by the one or more processor(s), a set of circuit priority indicators that are explicitly indicated within the text-based description, for a corresponding set of the logic sub-circuits,
synthesizing, by the one or more processor(s), the logic circuit according to the set of circuit priority indicators to provide a synthesized circuit description without requiring, or waiting for, estimation of a circuit slack for any of the plurality of logic sub-circuits, and
fabricating the logic circuit using the synthesized circuit description wherein a circuit priority indicator is a function parameter.

17. The computer system of claim 16 , wherein the synthesized circuit description retains the circuit priority indicators.

18. The computer system of claim 17 , wherein the program instructions further include instructions for causing the one or more computer processor(s) to perform the following operations:
placing the logic circuit according to the set of circuit priority indicators; and
routing the logic circuit according to the set of circuit priority indicators.

19. The computer system of claim 18 , wherein synthesizing includes logical synthesis or physical synthesis.

20. The computer system of claim 16 , wherein the synthesized circuit description comprises a gate level netlist or a transistor level netlist.

Assignees

• IBM

Inventors

• Ankenapalli Vijay K
• Datta Ayan
• George Sumitha
• Nagarajan Charudhattan
• Warnock James D

Classifications

• G06F30/327 Primary

  Logic synthesis; Behaviour synthesis, e.g. mapping logic, HDL to netlist, high-level language to RTL or netlist · CPC title

• G06F17/505 Primary

  Physics · mapped topic