Automated Constraint Equivalence Checking for IC Design Files
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Solution Overview
Problem
Current electronic design automation (EDA) systems lack an automatic tool for checking the equivalence of design constraints files, leading to time-consuming and error-prone manual processes during integrated circuit (IC) design.
Innovation Solution
A system and method for automatically checking the equivalence of constraints files at various stages of the IC design flow, including cleanup processes to remove duplicates and redundant constraints, and using formal verification engines to ensure equivalence between files.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual checking of constraint equivalence is performed by designers, then flexibility and adaptability are maintained, but the process becomes time-consuming and error-prone
Solution Approach 1:
The system enables constraint files to self-verify their equivalence through automated comparison. The constraint checking system automatically reads, parses, and compares constraints from different files without requiring manual intervention, allowing the design process to self-correct and validate constraints independently
Solution Approach 2:
The patent replaces the manual mechanical process of constraint checking with an automated computational system. Instead of designers manually reviewing and comparing constraint files, the system uses automated parsing, normalization, and comparison algorithms to perform the checking, substituting human effort with machine-based verification
2Productivity
If constraint files are modified and cleaned up at each design stage, then design efficiency and conciseness are improved, but the risk of introducing errors and losing equivalence increases
Solution Approach 1:
The system implements feedback by automatically verifying constraint equivalence after modifications. The comparison process provides immediate feedback to designers about whether cleaned-up or modified constraint files maintain equivalence with original files, allowing real-time validation and correction of any equivalence-breaking changes
Solution Approach 2:
The system performs preliminary validation by checking constraint equivalence before design stages proceed. By verifying equivalence upfront after constraint file modifications, the system prevents propagation of errors to subsequent design stages, ensuring that equivalence is maintained before moving forward with the design process
3Productivity
If automated constraint equivalence checking tools are implemented, then time consumption and manual errors are reduced, but system complexity increases
Solution Approach 1:
The system achieves universality by creating a multi-functional constraint checking platform that can handle various constraint file formats (SDC, TCL, MAGMA), perform multiple operations (parsing, normalization, comparison, validation), and support different design stages. This single automated system replaces multiple manual processes and handles diverse constraint scenarios through unified algorithms
Data Source
AI summary
The equivalence of two or more constraint files of an integrated circuit (IC) design are checked. The comparison is performed between files at the same stage of design, files that correspond to different stages of the design flow, or between top-level and block-level constraint files.