YosysHQ/yosys
Feb 2025 – Nov 2025
6 Months active
Languages Used
C++SystemVerilogPerlTclVerilog
Technical Skills
Backend DevelopmentBug FixingC++C++ DevelopmentCompiler DesignLogic Synthesis
Anhijkt
PROFILE
Anhijkt
Mihail Ershov contributed to the YosysHQ/yosys repository by developing and optimizing core synthesis features for digital logic design. Over six months, he delivered enhancements such as power-of-two and pattern simplification optimizations, improved FSM detection with ADFF support, and strengthened DSP module correctness. His work involved C++ and Verilog, focusing on compiler passes, code refactoring, and rigorous test-driven development. Mihail addressed bugs in boundary handling and reset logic, expanded test coverage, and resolved performance bottlenecks, resulting in more reliable synthesis workflows. His engineering demonstrated depth in backend development, logic synthesis, and hardware description language optimization, improving maintainability and design robustness.
Overall Statistics
Feature vs Bugs
62%Features
Repository Contributions
26Total
Bugs
5
Commits
26
Features
8
Lines of code
1,418
Activity Months6
Your Network
75 peopleShared Repositories
75
sdjasjMember
RonxBulldMember
tondapusiliMember
kamayMember
Adrien Prost-BoucleMember
Aritz ErkiagaMember
Akash LevyMember
Akash LevyMember
abhinavputhranMember
Work History
November 2025
3 Commits • 1 Features
Nov 1, 2025Month: 2025-11. This monthly summary highlights key contributions to the Yosys FSM analysis workflow, focusing on feature delivery, bug fixes, and overarching impact that enhances design reliability and business value.
3 Commits • 1 Features
Nov 1, 2025Month: 2025-11. This monthly summary highlights key contributions to the Yosys FSM analysis workflow, focusing on feature delivery, bug fixes, and overarching impact that enhances design reliability and business value.
November 2025
August 2025
3 Commits • 1 Features
Aug 1, 2025August 2025 monthly summary for YosysHQ/yosys: Strengthened the opt_dff optimization pass with extensive test coverage and a stability fix that reduces timeouts. Delivered robust test suites and a timeout-resolution fix, reinforcing optimization correctness while reducing regression risk and improving overall synthesis performance.
August 2025
3 Commits • 1 Features
Aug 1, 2025August 2025 monthly summary for YosysHQ/yosys: Strengthened the opt_dff optimization pass with extensive test coverage and a stability fix that reduces timeouts. Delivered robust test suites and a timeout-resolution fix, reinforcing optimization correctness while reducing regression risk and improving overall synthesis performance.
July 2025
5 Commits • 1 Features
Jul 1, 2025Concise monthly summary for 2025-07 focusing on key accomplishments, business value, and technical achievements for the YosysHQ/yosys project.
5 Commits • 1 Features
Jul 1, 2025Concise monthly summary for 2025-07 focusing on key accomplishments, business value, and technical achievements for the YosysHQ/yosys project.
July 2025
April 2025
6 Commits • 1 Features
Apr 1, 2025April 2025: Focused on delivering value through performance optimization and correctness in the Yosys core. Delivered a Power-of-two optimization in the opt_expr pass with added tests, and fixed Ice40 DSP constant handling and unsigned/signed extension, including validation tests and clarifications in behavior. These changes improve synthesis performance, correctness, and test coverage, reducing risk in DSP paths and improving long-term maintainability.
April 2025
6 Commits • 1 Features
Apr 1, 2025April 2025: Focused on delivering value through performance optimization and correctness in the Yosys core. Delivered a Power-of-two optimization in the opt_expr pass with added tests, and fixed Ice40 DSP constant handling and unsigned/signed extension, including validation tests and clarifications in behavior. These changes improve synthesis performance, correctness, and test coverage, reducing risk in DSP paths and improving long-term maintainability.
March 2025
6 Commits • 3 Features
Mar 1, 20252025-03 monthly summary for YosysHQ/yosys. Focused on stability, coverage, and optimization: Ice40 DSP module robustness and test coverage improved reliability; extended unit tests and refactoring; added tests for splitcells; implemented power-of-2 optimizations in the expression optimizer. These efforts increase reliability, test coverage, and circuit performance, delivering business value by reducing risk in DSP synthesis, improving RTLIL verification, and accelerating designs.
6 Commits • 3 Features
Mar 1, 20252025-03 monthly summary for YosysHQ/yosys. Focused on stability, coverage, and optimization: Ice40 DSP module robustness and test coverage improved reliability; extended unit tests and refactoring; added tests for splitcells; implemented power-of-2 optimizations in the expression optimizer. These efforts increase reliability, test coverage, and circuit performance, delivering business value by reducing risk in DSP synthesis, improving RTLIL verification, and accelerating designs.
March 2025
February 2025
3 Commits • 1 Features
Feb 1, 2025February 2025 highlights for YosysHQ/yosys: Key features delivered include AIGER export loop detection with enhanced error reporting to prevent incorrect outputs and aid troubleshooting. Major bugs fixed include robustness fixes in Splitcells boundary handling, addressing out-of-bounds and loop-condition issues to prevent crashes during signal slicing. Overall, these changes improve reliability of AIGER export and splitcells workflows, reducing post-commit troubleshooting time. Technologies demonstrated include C++ codebase navigation, runtime validation, and careful boundary management, contributing to higher stability and better user experience for synthesis artifacts.
February 2025
3 Commits • 1 Features
Feb 1, 2025February 2025 highlights for YosysHQ/yosys: Key features delivered include AIGER export loop detection with enhanced error reporting to prevent incorrect outputs and aid troubleshooting. Major bugs fixed include robustness fixes in Splitcells boundary handling, addressing out-of-bounds and loop-condition issues to prevent crashes during signal slicing. Overall, these changes improve reliability of AIGER export and splitcells workflows, reducing post-commit troubleshooting time. Technologies demonstrated include C++ codebase navigation, runtime validation, and careful boundary management, contributing to higher stability and better user experience for synthesis artifacts.
Activity
Loading activity data...
Quality Metrics
Correctness87.6%
Maintainability88.4%
Architecture86.2%
Performance83.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
C++PerlSystemVerilogTclVerilog
Technical Skills
Backend DevelopmentBug FixBug FixingC++C++ DevelopmentC++ programmingCode OptimizationCode RefactoringCompiler DesignCompiler OptimizationCompiler PassesDigital Circuit DesignDigital DesignDigital Design VerificationDigital Logic Design
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline