YosysHQ/yosys
May 2025 – Jul 2025
3 Months active
Languages Used
C++PythonRSTSystemVerilogTclVerilogYosys Script
Technical Skills
Abstract Syntax Trees (AST)Code CorrectionCompiler DesignCompiler DevelopmentDocumentationFormal Verification
Gary Wong
PROFILE
Gary Wong
Greg worked on the YosysHQ/yosys repository, focusing on enhancing SystemVerilog and Verilog frontend support over three months. He implemented parsing and AST support for SystemVerilog unique, unique0, and priority if semantics, ensuring correct multiplexer generation and attribute preservation. Using C++ and regular expressions, Greg optimized string literal parsing in the Verilog lexer for better performance and addressed memory safety in the parser’s handling of if statements. He also expanded lexer and parser capabilities to support SystemVerilog string literals, including triple-quoted strings and escape sequences, while updating documentation and tests to ensure robust, standards-compliant language compatibility.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
12Total
Bugs
2
Commits
12
Features
4
Lines of code
1,303
Activity Months3
Your Network
83 peopleSame Organization
@gnu.org8
Shared Repositories
75
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Work History
July 2025
2 Commits • 1 Features
Jul 1, 2025July 2025: Focused on expanding SystemVerilog support in the Verilog frontend for Yosys. Delivered parsing and lexer support for SystemVerilog string literals, including triple-quoted strings and various escape sequences, with corresponding tests, docs, and code updates. This work improves language compatibility, reduces user friction, and enables more accurate synthesis and analysis of SV code.
2 Commits • 1 Features
Jul 1, 2025July 2025: Focused on expanding SystemVerilog support in the Verilog frontend for Yosys. Delivered parsing and lexer support for SystemVerilog string literals, including triple-quoted strings and various escape sequences, with corresponding tests, docs, and code updates. This work improves language compatibility, reduces user friction, and enables more accurate synthesis and analysis of SV code.
July 2025
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 (2025-06) monthly summary for YosysHQ/yosys: focused on performance and stability improvements in the Verilog frontend. Highlights include a performance optimization for string literal parsing and a memory-safety fix for the Verilog parser's if-statements, delivering faster parsing and more reliable design synthesis. These changes reduce parsing time for large designs and prevent memory leaks, contributing to robust frontend maintenance and smoother CI workflows.
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025 (2025-06) monthly summary for YosysHQ/yosys: focused on performance and stability improvements in the Verilog frontend. Highlights include a performance optimization for string literal parsing and a memory-safety fix for the Verilog parser's if-statements, delivering faster parsing and more reliable design synthesis. These changes reduce parsing time for large designs and prevent memory leaks, contributing to robust frontend maintenance and smoother CI workflows.
May 2025
8 Commits • 2 Features
May 1, 2025May 2025 monthly summary for YosysHQ/yosys focusing on SystemVerilog front-end enhancements, documentation improvements, and quality fixes. The work emphasizes business value through strengthened SV support and clearer developer guidance, enabling more reliable SV-based designs and easier onboarding for users migrating to SV features.
8 Commits • 2 Features
May 1, 2025May 2025 monthly summary for YosysHQ/yosys focusing on SystemVerilog front-end enhancements, documentation improvements, and quality fixes. The work emphasizes business value through strengthened SV support and clearer developer guidance, enabling more reliable SV-based designs and easier onboarding for users migrating to SV features.
May 2025
Activity
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Quality Metrics
Correctness92.6%
Maintainability90.0%
Architecture90.8%
Performance86.8%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++PythonRSTSystemVerilogTclVerilogYosys Script
Technical Skills
Abstract Syntax Trees (AST)C/C++Code CorrectionCompiler DesignCompiler DevelopmentDocumentationFormal VerificationHardware Description LanguageHardware Description LanguagesLexerLexer DevelopmentLexical AnalysisLogic SynthesisMemory ManagementParser Development
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline