YosysHQ/yosys
May 2025 – Sep 2025
3 Months active
Languages Used
C++SystemVerilogMakefileMarkdownTclYAMLYosys Script
Technical Skills
AIGER FormatC++Embedded systemsHardware Description Language (HDL)Regression TestingTcl scripting
Emil Jiří Tywoniak
PROFILE
Emil Jiří Tywoniak
Emil Tywoniak contributed to the YosysHQ/yosys repository by developing foundational support for Synopsys Design Constraints, refactoring pin matching logic, and enhancing build and runtime compatibility for WebAssembly. He applied C++ and Tcl scripting to create reusable templates, streamline SDC and Tcl integration, and introduce robust data structures for bit selection management. Emil improved file handling by adopting std::filesystem and expanded liberty file support through globbing, addressing scalability and reliability. His work included regression testing, documentation updates, and community guideline revisions, resulting in more maintainable code, improved contributor onboarding, and a stronger foundation for constraint-driven design workflows.
Overall Statistics
Feature vs Bugs
75%Features
Repository Contributions
13Total
Bugs
2
Commits
13
Features
6
Lines of code
705
Activity Months3
Your Network
75 peopleShared Repositories
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Work History
September 2025
9 Commits • 3 Features
Sep 1, 20252025-09 Monthly Summary for YosysHQ/yosys focusing on delivering reliability, scalability, and contributor experience. Implemented build/runtime compatibility improvements for WebAssembly, extended liberty file handling via globbing across multiple components, fixed accuracy in Gowin test suite, and updated community guidelines to streamline collaboration. Demonstrated strong integration discipline, test coverage, and documentation improvements that translate to faster onboarding and more reliable builds.
9 Commits • 3 Features
Sep 1, 20252025-09 Monthly Summary for YosysHQ/yosys focusing on delivering reliability, scalability, and contributor experience. Implemented build/runtime compatibility improvements for WebAssembly, extended liberty file handling via globbing across multiple components, fixed accuracy in Gowin test suite, and updated community guidelines to streamline collaboration. Demonstrated strong integration discipline, test coverage, and documentation improvements that translate to faster onboarding and more reliable builds.
September 2025
August 2025
2 Commits • 2 Features
Aug 1, 2025August 2025: Core refactors in YosysHQ/yosys to improve reliability and maintainability of design-pin matching and SDC/Tcl workflows, reducing duplication and setting foundations for future enhancements.
August 2025
2 Commits • 2 Features
Aug 1, 2025August 2025: Core refactors in YosysHQ/yosys to improve reliability and maintainability of design-pin matching and SDC/Tcl workflows, reducing duplication and setting foundations for future enhancements.
May 2025
2 Commits • 1 Features
May 1, 2025May 2025: Delivered foundational SDC command support and reinforced I/O stability through regression testing. The work establishes groundwork for constraint-driven design features and improves the robustness of AIGER export paths. Focus areas include business value, technical achievements, and measurable outcomes for the Yosys verification and constraint-management roadmap.
2 Commits • 1 Features
May 1, 2025May 2025: Delivered foundational SDC command support and reinforced I/O stability through regression testing. The work establishes groundwork for constraint-driven design features and improves the robustness of AIGER export paths. Focus areas include business value, technical achievements, and measurable outcomes for the Yosys verification and constraint-management roadmap.
May 2025
Activity
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Quality Metrics
Correctness89.2%
Maintainability90.8%
Architecture89.2%
Performance81.6%
AI Usage21.6%
Skills & Technologies
Programming Languages
C++MakefileMarkdownSystemVerilogTclYAMLYosys Script
Technical Skills
AIGER FormatBuild AutomationBuild SystemBuild SystemsC++C++ DevelopmentC++ developmentCI/CDCommunity ManagementCompiler DevelopmentDocumentationEmbedded systemsFile I/OHardware Description LanguageHardware Description Language (HDL)
Repositories Contributed To
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