verilog-to-routing/vtr-verilog-to-routing
Mar 2025 – Apr 2026
12 Months active
Languages Used
C++RSTTextDockerfileShellCCMakeNone
Technical Skills
Bug FixBuild SystemBuild SystemsC++C++ DevelopmentCAD Tools
Amin Mohaghegh
PROFILE
Amin Mohaghegh
Over the past year, contributed to the verilog-to-routing/vtr-verilog-to-routing repository by delivering core enhancements to FPGA routing, packing, and architecture modeling. Focused on modernizing the routing resource graph, implementing data-driven connection generation, and improving timing and placement accuracy for tileable and clustered architectures. Leveraged C++ and CMake to refactor critical data structures, optimize algorithms, and streamline build systems, while integrating YAML and XML for configuration and documentation. Addressed complex bug fixes and expanded test coverage, resulting in more reliable CI pipelines and maintainable code. The work emphasized robust API design, code clarity, and scalable solutions for advanced FPGA workflows.
Overall Statistics
Feature vs Bugs
64%Features
Repository Contributions
438Total
Bugs
72
Commits
438
Features
129
Lines of code
271,096
Activity Months12
Your Network
46 peopleSame Organization
@quicklogic.com4
Shared Repositories
42
Work History
April 2026
6 Commits • 1 Features
Apr 1, 2026April 2026 monthly summary for verilog-to-routing/vtr-verilog-to-routing focusing on the device model warnings feature and code health improvements: Key features delivered: - Introduced a new boolean parameter device_model_warnings to control warnings related to architecture lookahead within the routing resource graph and architecture checks. The parameter was unified in naming, updated across the codebase, and accompanied by tests and documentation. Major bugs fixed: - Resolved an unused variable warning in the FPGA interchange architecture reader, improving code cleanliness and maintainability. Overall impact and accomplishments: - Improved configurability and consistency of warning messaging across VPR components, enabling clearer user feedback and easier maintenance. - Enhanced test coverage and documentation for the new parameter, reducing risk of regressions and increasing developer onboarding efficiency. Technologies/skills demonstrated: - C++/codebase hygiene across libs/cli/docs, parameter propagation and cross-module integration, test-driven updates, and documentation work, reflecting strong end-to-end changes from feature introduction to QA and documentation.
6 Commits • 1 Features
Apr 1, 2026April 2026 monthly summary for verilog-to-routing/vtr-verilog-to-routing focusing on the device model warnings feature and code health improvements: Key features delivered: - Introduced a new boolean parameter device_model_warnings to control warnings related to architecture lookahead within the routing resource graph and architecture checks. The parameter was unified in naming, updated across the codebase, and accompanied by tests and documentation. Major bugs fixed: - Resolved an unused variable warning in the FPGA interchange architecture reader, improving code cleanliness and maintainability. Overall impact and accomplishments: - Improved configurability and consistency of warning messaging across VPR components, enabling clearer user feedback and easier maintenance. - Enhanced test coverage and documentation for the new parameter, reducing risk of regressions and increasing developer onboarding efficiency. Technologies/skills demonstrated: - C++/codebase hygiene across libs/cli/docs, parameter propagation and cross-module integration, test-driven updates, and documentation work, reflecting strong end-to-end changes from feature introduction to QA and documentation.
April 2026
March 2026
9 Commits • 1 Features
Mar 1, 2026Month: 2026-03 — Architecture routing warnings system delivered as warn_arch_rr_lookahead; cross-module propagation and default-on behavior implemented for consistent architecture-aware warnings.
March 2026
9 Commits • 1 Features
Mar 1, 2026Month: 2026-03 — Architecture routing warnings system delivered as warn_arch_rr_lookahead; cross-module propagation and default-on behavior implemented for consistent architecture-aware warnings.
February 2026
18 Commits • 3 Features
Feb 1, 2026February 2026 monthly summary for verilog-to-routing/vtr-verilog-to-routing focused on delivering clear netlist artifacts, data-driven routing enhancements, and a more maintainable RRGraph edge model, while addressing routing correctness issues. Key features and fixes delivered: - Netlist: Include model name in netlist and BLIF references; align atom netlist echo with BLIF standard for clearer subcircuits. - Routing graph: Fix tap-zero (tap-0) connections; corrected handling to ensure proper IPIN connections based on channel wire direction. - Connection generation: Dataframe-based connection construction; refactor to separate concerns and add a dataframe-based method to generate connections, improving flexibility. - Routing resource graph edge handling overhaul: Major internal refactor introducing RRGraphInEdges and related cleanup to improve edge traversal accuracy and maintainability. Overall impact and accomplishments: - Improved clarity and traceability of netlist outputs, enabling easier debugging and integration. - More robust and flexible routing pipeline, with data-driven capabilities for connection generation and clearer edge handling in RRGraph. - Increased maintainability and scalability of the routing codebase through substantial refactors and cleanup, reducing technical debt and guiding future enhancements. Technologies/skills demonstrated: - C++ codebase refactoring, graph data structures, and RRGraph architecture updates. - BLIF/netlist formatting alignment and clear subcircuit representation. - Dataframe-based design patterns for connection generation and improved testability. - Change management discipline with controlled fixes and revert-safe patches.
18 Commits • 3 Features
Feb 1, 2026February 2026 monthly summary for verilog-to-routing/vtr-verilog-to-routing focused on delivering clear netlist artifacts, data-driven routing enhancements, and a more maintainable RRGraph edge model, while addressing routing correctness issues. Key features and fixes delivered: - Netlist: Include model name in netlist and BLIF references; align atom netlist echo with BLIF standard for clearer subcircuits. - Routing graph: Fix tap-zero (tap-0) connections; corrected handling to ensure proper IPIN connections based on channel wire direction. - Connection generation: Dataframe-based connection construction; refactor to separate concerns and add a dataframe-based method to generate connections, improving flexibility. - Routing resource graph edge handling overhaul: Major internal refactor introducing RRGraphInEdges and related cleanup to improve edge traversal accuracy and maintainability. Overall impact and accomplishments: - Improved clarity and traceability of netlist outputs, enabling easier debugging and integration. - More robust and flexible routing pipeline, with data-driven capabilities for connection generation and clearer edge handling in RRGraph. - Increased maintainability and scalability of the routing codebase through substantial refactors and cleanup, reducing technical debt and guiding future enhancements. Technologies/skills demonstrated: - C++ codebase refactoring, graph data structures, and RRGraph architecture updates. - BLIF/netlist formatting alignment and clear subcircuit representation. - Dataframe-based design patterns for connection generation and improved testability. - Change management discipline with controlled fixes and revert-safe patches.
February 2026
January 2026
36 Commits • 19 Features
Jan 1, 2026January 2026 (verilog-to-routing/vtr-verilog-to-routing) — Delivered tileable-arch enhancements, CRR routing improvements, and RR-graph/runtime optimizations that enable richer timing models, more scalable routing for tileable designs, and faster, more deterministic results across large benchmarks. Key features delivered include: Tileable architecture extensions added to timing/arch coverage (extra_small device and k6_frac_N10_frac_chain_mem32K_40nm_tileable) to support more granular timing analyses and layout variants. VTR Flow: introduced strong_crr component to the VTR flow to improve routing quality and scalability for complex clusters. VPR route improvements for tileable designs: reordered incoming edges when a parameter is set and preserved edge order using a map to ensure deterministic routing outcomes. RR Graph performance: limited RR graph iteration to only seen switches to reduce work and improve scalability in large designs. CRR Route Core Data Structures and Pattern Matching Improvements: extensive restructuring using unordered maps, optimized caching, and topology-focused node representations to speed up CRR routing. These updates were complemented by CI/quality work including golden results updates and additional code formatting to maintain nightly stability and readability.
January 2026
36 Commits • 19 Features
Jan 1, 2026January 2026 (verilog-to-routing/vtr-verilog-to-routing) — Delivered tileable-arch enhancements, CRR routing improvements, and RR-graph/runtime optimizations that enable richer timing models, more scalable routing for tileable designs, and faster, more deterministic results across large benchmarks. Key features delivered include: Tileable architecture extensions added to timing/arch coverage (extra_small device and k6_frac_N10_frac_chain_mem32K_40nm_tileable) to support more granular timing analyses and layout variants. VTR Flow: introduced strong_crr component to the VTR flow to improve routing quality and scalability for complex clusters. VPR route improvements for tileable designs: reordered incoming edges when a parameter is set and preserved edge order using a map to ensure deterministic routing outcomes. RR Graph performance: limited RR graph iteration to only seen switches to reduce work and improve scalability in large designs. CRR Route Core Data Structures and Pattern Matching Improvements: extensive restructuring using unordered maps, optimized caching, and topology-focused node representations to speed up CRR routing. These updates were complemented by CI/quality work including golden results updates and additional code formatting to maintain nightly stability and readability.
December 2025
104 Commits • 26 Features
Dec 1, 2025December 2025 (Month: 2025-12) delivered substantial CRR/RR graph modernization, improved test fidelity, and strengthened documentation, contributing to more reliable routing, easier maintenance, and faster onboarding for template-based architectures.
104 Commits • 26 Features
Dec 1, 2025December 2025 (Month: 2025-12) delivered substantial CRR/RR graph modernization, improved test fidelity, and strengthened documentation, contributing to more reliable routing, easier maintenance, and faster onboarding for template-based architectures.
December 2025
November 2025
131 Commits • 37 Features
Nov 1, 2025November 2025 monthly summary for verilog-to-routing/vtr-verilog-to-routing focused on core CRR and RR-graph enhancements, robust IPIN/OPIN handling, and code quality improvements. Delivered delay-based CRR routing in rr_graph with derived switch_id from delay, enabling more accurate timing and routing decisions. Hardened IPIN/OPIN edge construction by pushing edge builds outside conditional blocks, handling empty IPIN/OPIN arrays gracefully, and applying default connections from parameters. Implemented guard for tileable routing to skip processing when track2track_map is empty, reducing unnecessary work and potential edge cases. Completed CRR cleanup and refactor efforts, moved critical logic to rr_graph_intra_cluster, and propagated CRR IDs throughout RR graph edge representations for consistency. Migrated cluster-pin logic into rr_graph_intra_cluster, improved YAML tooling integration with system libs, and applied batch code formatting for maintainability. These changes collectively improve routing accuracy, stability, maintenance, and CI reliability, delivering measurable business value.
November 2025
131 Commits • 37 Features
Nov 1, 2025November 2025 monthly summary for verilog-to-routing/vtr-verilog-to-routing focused on core CRR and RR-graph enhancements, robust IPIN/OPIN handling, and code quality improvements. Delivered delay-based CRR routing in rr_graph with derived switch_id from delay, enabling more accurate timing and routing decisions. Hardened IPIN/OPIN edge construction by pushing edge builds outside conditional blocks, handling empty IPIN/OPIN arrays gracefully, and applying default connections from parameters. Implemented guard for tileable routing to skip processing when track2track_map is empty, reducing unnecessary work and potential edge cases. Completed CRR cleanup and refactor efforts, moved critical logic to rr_graph_intra_cluster, and propagated CRR IDs throughout RR graph edge representations for consistency. Migrated cluster-pin logic into rr_graph_intra_cluster, improved YAML tooling integration with system libs, and applied batch code formatting for maintainability. These changes collectively improve routing accuracy, stability, maintenance, and CI reliability, delivering measurable business value.
October 2025
69 Commits • 13 Features
Oct 1, 2025Month 2025-10 – Delivered a focused set of feature deliveries, CRR (clocked routing resources) improvements, and build/maintainability enhancements for verilog-to-routing/vtr-verilog-to-routing. The work strengthens build reliability, typing correctness, and CRR workflow, while stabilizing external dependencies to reduce risk and speed future iterations.
69 Commits • 13 Features
Oct 1, 2025Month 2025-10 – Delivered a focused set of feature deliveries, CRR (clocked routing resources) improvements, and build/maintainability enhancements for verilog-to-routing/vtr-verilog-to-routing. The work strengthens build reliability, typing correctness, and CRR workflow, while stabilizing external dependencies to reduce risk and speed future iterations.
October 2025
September 2025
5 Commits • 1 Features
Sep 1, 2025September 2025: Delivered Node Sides API across RR Graph storage and RRGraphView, hardened RR graph sides validation against architecture, and improved error messaging for non-pin RR nodes. These changes advance graph querying, placement awareness, and routing reliability, delivering clearer diagnostics and stronger alignment between RR graphs and architecture definitions.
September 2025
5 Commits • 1 Features
Sep 1, 2025September 2025: Delivered Node Sides API across RR Graph storage and RRGraphView, hardened RR graph sides validation against architecture, and improved error messaging for non-pin RR nodes. These changes advance graph querying, placement awareness, and routing reliability, delivering clearer diagnostics and stronger alignment between RR graphs and architecture definitions.
July 2025
10 Commits • 5 Features
Jul 1, 2025Month: 2025-07 | Repository: verilog-to-routing/vtr-verilog-to-routing This month delivered a focused set of features and reliability improvements that enhance debugging, extensibility, observability, and build stability. The work aligns with business goals of enabling OpenFPGA integration, improving routing quality metrics, and reducing build-time failures while increasing robustness of the packing workflow. Key outcomes: - OpenFPGA readiness through RRGraph API exposure and removal of static usage for key builder/utils functions in support of external tooling. - Expanded interconnect taxonomy with a new enumerator and string mapping to improve debugging and enable future configurations. - Tileable routing graph improvements, including a fix to driver switch assignment and associated formatting cleanup, for more reliable tileable routing builds. - Enhanced routing statistics: actual occupancy and capacity reporting, with updated headers to reflect new metrics for better planning and optimization. - Improved packing robustness by skipping invalid blocks in the greedy seed selector to prevent errors with invalid molecule blocks. Additional build/test infrastructure updates were implemented to stabilize constraint tests and adjust interchange path handling, contributing to more reliable CI and release pipelines.
10 Commits • 5 Features
Jul 1, 2025Month: 2025-07 | Repository: verilog-to-routing/vtr-verilog-to-routing This month delivered a focused set of features and reliability improvements that enhance debugging, extensibility, observability, and build stability. The work aligns with business goals of enabling OpenFPGA integration, improving routing quality metrics, and reducing build-time failures while increasing robustness of the packing workflow. Key outcomes: - OpenFPGA readiness through RRGraph API exposure and removal of static usage for key builder/utils functions in support of external tooling. - Expanded interconnect taxonomy with a new enumerator and string mapping to improve debugging and enable future configurations. - Tileable routing graph improvements, including a fix to driver switch assignment and associated formatting cleanup, for more reliable tileable routing builds. - Enhanced routing statistics: actual occupancy and capacity reporting, with updated headers to reflect new metrics for better planning and optimization. - Improved packing robustness by skipping invalid blocks in the greedy seed selector to prevent errors with invalid molecule blocks. Additional build/test infrastructure updates were implemented to stabilize constraint tests and adjust interchange path handling, contributing to more reliable CI and release pipelines.
July 2025
May 2025
2 Commits • 2 Features
May 1, 2025May 2025: Delivered performance-focused improvements in the verilog-to-routing pack and route subsystems, with a focus on efficiency and maintainability that translates to faster builds and clearer diagnostics.
May 2025
2 Commits • 2 Features
May 1, 2025May 2025: Delivered performance-focused improvements in the verilog-to-routing pack and route subsystems, with a focus on efficiency and maintainability that translates to faster builds and clearer diagnostics.
April 2025
20 Commits • 3 Features
Apr 1, 2025April 2025 (2025-04) monthly summary for verilog-to-routing/vtr-verilog-to-routing: Delivered robust VPR net packing enhancements with improved sink/driving block resolution, added multi-sink support, and reinforced validation to prevent incorrect packing. Implemented development tooling improvements (clang-format-18 onboarding, updated scripts/docs) and updated regression test configurations for 3D Strong tests. Major packing-related bugs fixed include sink pin identification, net validity checks, and proper handling of multi-sink nets with chain patterns. These changes yield higher packing accuracy, more reliable regressions, and faster developer onboarding while improving code quality and maintainability.
20 Commits • 3 Features
Apr 1, 2025April 2025 (2025-04) monthly summary for verilog-to-routing/vtr-verilog-to-routing: Delivered robust VPR net packing enhancements with improved sink/driving block resolution, added multi-sink support, and reinforced validation to prevent incorrect packing. Implemented development tooling improvements (clang-format-18 onboarding, updated scripts/docs) and updated regression test configurations for 3D Strong tests. Major packing-related bugs fixed include sink pin identification, net validity checks, and proper handling of multi-sink nets with chain patterns. These changes yield higher packing accuracy, more reliable regressions, and faster developer onboarding while improving code quality and maintainability.
April 2025
March 2025
28 Commits • 18 Features
Mar 1, 2025March 2025 monthly summary for verilog-to-routing/vtr-verilog-to-routing: Delivered a focused set of VPR improvements, bug fixes, and codebase refinements to boost placement accuracy, modeling fidelity, and system observability, while improving maintainability and developer efficiency. Highlights include wirelength estimation enhancements in VPR Place, cleanup and simplifications in rr_graph2 and RRGraph-related code, and expanded resource usage reporting. These changes enable better optimization decisions, faster iteration, and clearer operational visibility for customers and internal teams.
March 2025
28 Commits • 18 Features
Mar 1, 2025March 2025 monthly summary for verilog-to-routing/vtr-verilog-to-routing: Delivered a focused set of VPR improvements, bug fixes, and codebase refinements to boost placement accuracy, modeling fidelity, and system observability, while improving maintainability and developer efficiency. Highlights include wirelength estimation enhancements in VPR Place, cleanup and simplifications in rr_graph2 and RRGraph-related code, and expanded resource usage reporting. These changes enable better optimization decisions, faster iteration, and clearer operational visibility for customers and internal teams.
Activity
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Quality Metrics
Correctness94.4%
Maintainability92.0%
Architecture91.4%
Performance90.6%
AI Usage21.2%
Skills & Technologies
Programming Languages
CC++CMakeCap'n ProtoDockerfileGitMarkdownNonePythonRST
Technical Skills
API designAPI developmentAlgorithm DesignAlgorithm ImplementationAlgorithm OptimizationBug FixBuild SystemBuild System ConfigurationBuild SystemsC++C++ DevelopmentC++ ProgrammingC++ developmentC++ programmingCAD Tools
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