OpenVADL/openvadl
Nov 2024 – Jul 2026
20 Months active
Languages Used
CC++JavaPythonShellTableGenVHDLXML
Technical Skills
Compiler developmentEmbedded systemsLow-level programmingArithmetic Logic Unit (ALU) ImplementationBenchmarkingBuild Systems
Johannes Zottele
PROFILE
Johannes Zottele
Over 20 months, contributed to OpenVADL/openvadl by architecting and implementing advanced processor modeling, vector instruction support, and robust code generation pipelines. Leveraging Java, Kotlin, and C, delivered features such as dynamic slicing, vector benchmarks, and cross-platform build automation, while refactoring core components for maintainability and performance. Enhanced the type system and frontend with alias slicing, wildcard register access, and improved symbol resolution, enabling more accurate hardware simulation and ISA coverage. Strengthened CI/CD workflows and documentation, modernized the build system, and expanded test infrastructure, resulting in a scalable, reliable toolchain for embedded systems and hardware architecture development.
Overall Statistics
Feature vs Bugs
72%Features
Repository Contributions
499Total
Bugs
79
Commits
499
Features
207
Lines of code
277,359
Activity Months20
Your Network
24 peopleShared Repositories
24
Andreas KrallMember
Benedikt HuberMember
Giftzwerg02Member
Matthias RaschhoferMember
Alexander RiparMember
kevinMember
Benjamin KasperMember
tmagesMember
Tobias WeissMember
Work History
July 2026
2 Commits • 1 Features
Jul 1, 2026July 2026 monthly focus: Release packaging and distribution alignment for OpenVADL/openvadl, with emphasis on CI-driven consistency and cross-platform installability. The work delivered ensures reliable tagging, clearer binary naming, and a JVM-based distribution path aligned with platform-specific steps, laying groundwork for streamlined releases and improved user/install experience.
2 Commits • 1 Features
Jul 1, 2026July 2026 monthly focus: Release packaging and distribution alignment for OpenVADL/openvadl, with emphasis on CI-driven consistency and cross-platform installability. The work delivered ensures reliable tagging, clearer binary naming, and a JVM-based distribution path aligned with platform-specific steps, laying groundwork for streamlined releases and improved user/install experience.
July 2026
June 2026
17 Commits • 2 Features
Jun 1, 2026June 2026 monthly summary for OpenVADL/openvadl focusing on feature delivery, bug fixes, and overall impact across the repository. Highlights include vector and gvec lowering enhancements with new vector instructions, critical AArch32 memory write fixes, and expanded CI/benchmarking infrastructure to improve reliability and performance visibility.
June 2026
17 Commits • 2 Features
Jun 1, 2026June 2026 monthly summary for OpenVADL/openvadl focusing on feature delivery, bug fixes, and overall impact across the repository. Highlights include vector and gvec lowering enhancements with new vector instructions, critical AArch32 memory write fixes, and expanded CI/benchmarking infrastructure to improve reliability and performance visibility.
May 2026
27 Commits • 7 Features
May 1, 2026Month: 2026-05 Key features delivered: - Vector benchmarks tooling and CI workflow: Added vectorbench64.vadl specification, ELF binary generation utilities, vector benchmark generation, and a CI workflow to run and publish vectorbench64 benchmarks. Benchmarks run in a tight loop with configurable iterations and instruction chains, with improved test logging for easier debugging. - ISS/Compiler infrastructure enhancements: Split passes into backend-specific classes and packages, added a CPU-vector storage metadata foundation, and expanded hex conversion handling. This lays groundwork for scalable backends and vector-aware optimizations. - VIAM core data structures and optimizations: Refactored Abi.RegisterRef, improved memory efficiency in Graph.getNodes via new iterators, and introduced call-side optimization strategies. - VIAM frontend improvements and graph optimization: Implemented copy-on-write for node-list application, added support for partial (alias) register access, and introduced binding information to ForIdxNode to track forall indices, preventing unintended collapsing. - CI/workflow improvements: Removed redundant timestamp job in benchmark workflow, added JLink packaging/upstream drafting for releases, and ensured benchmark result paths are consistent across hosts (fix for host result path). - ISS: Strategy analysis infrastructure established to enable data-driven decision-making in optimization and lowering. - ISS: Vector analysis and gvec infrastructure: Implemented gvec lowering for forall tensor assignments, fast-path aligned CPU-vector chunk accesses, support for partial index counts in register access helpers, added OperandForm to vector plans, and refactored vector analysis for region-based classification. Overall impact and accomplishments: - Accelerated performance analysis and reliability of vector-focused benchmarks, enabling faster feedback cycles for performance improvements. - Strengthened compiler architecture with backend-specific pass ordering and modular VIAM/vector infrastructure, improving maintainability and scalability for future feature work. - Enhanced runtime efficiency and memory usage in core data structures and graph processing, with targeted optimizations reducing overhead in common code paths. - Improved build and release processes, delivering more dependable CI artifacts and streamlined distribution of tooling (JLink, ELF binaries). Technologies and skills demonstrated: - ELF/ProgramAssembler and ElfProgramBuilder usage for binary generation; vector benchmark tooling; CI/CD automation. - Backend architecture: RtlPassOrder, IssPassOrder, GcbPassOrder; modularization of passes and packages. - VIAM data structures and graph optimization techniques; snapshot/iterator pattern optimizations. - Vector analysis, gvec lowering, forall support, and OperandForm integration; partial index handling improvements.
27 Commits • 7 Features
May 1, 2026Month: 2026-05 Key features delivered: - Vector benchmarks tooling and CI workflow: Added vectorbench64.vadl specification, ELF binary generation utilities, vector benchmark generation, and a CI workflow to run and publish vectorbench64 benchmarks. Benchmarks run in a tight loop with configurable iterations and instruction chains, with improved test logging for easier debugging. - ISS/Compiler infrastructure enhancements: Split passes into backend-specific classes and packages, added a CPU-vector storage metadata foundation, and expanded hex conversion handling. This lays groundwork for scalable backends and vector-aware optimizations. - VIAM core data structures and optimizations: Refactored Abi.RegisterRef, improved memory efficiency in Graph.getNodes via new iterators, and introduced call-side optimization strategies. - VIAM frontend improvements and graph optimization: Implemented copy-on-write for node-list application, added support for partial (alias) register access, and introduced binding information to ForIdxNode to track forall indices, preventing unintended collapsing. - CI/workflow improvements: Removed redundant timestamp job in benchmark workflow, added JLink packaging/upstream drafting for releases, and ensured benchmark result paths are consistent across hosts (fix for host result path). - ISS: Strategy analysis infrastructure established to enable data-driven decision-making in optimization and lowering. - ISS: Vector analysis and gvec infrastructure: Implemented gvec lowering for forall tensor assignments, fast-path aligned CPU-vector chunk accesses, support for partial index counts in register access helpers, added OperandForm to vector plans, and refactored vector analysis for region-based classification. Overall impact and accomplishments: - Accelerated performance analysis and reliability of vector-focused benchmarks, enabling faster feedback cycles for performance improvements. - Strengthened compiler architecture with backend-specific pass ordering and modular VIAM/vector infrastructure, improving maintainability and scalability for future feature work. - Enhanced runtime efficiency and memory usage in core data structures and graph processing, with targeted optimizations reducing overhead in common code paths. - Improved build and release processes, delivering more dependable CI artifacts and streamlined distribution of tooling (JLink, ELF binaries). Technologies and skills demonstrated: - ELF/ProgramAssembler and ElfProgramBuilder usage for binary generation; vector benchmark tooling; CI/CD automation. - Backend architecture: RtlPassOrder, IssPassOrder, GcbPassOrder; modularization of passes and packages. - VIAM data structures and graph optimization techniques; snapshot/iterator pattern optimizations. - Vector analysis, gvec lowering, forall support, and OperandForm integration; partial index handling improvements.
May 2026
April 2026
8 Commits • 4 Features
Apr 1, 2026April 2026 monthly summary for OpenVADL/openvadl: Delivered substantial improvements in code generation efficiency and correctness, resolved critical architecture-specific bugs, and strengthened CI/testing and benchmarking workflows. Key code-generation enhancements include conditional unrolling of forall loops, tensor expression to forall do transformation, and a new pass to save common scalar subexpressions, collectively enabling faster builds, reduced code size, and more robust optimization opportunities. Critical bug fixes fixed inlining of status flags to prevent leakage of Status-typed nodes into ISS passes and corrected reset/register dump handling for 64+ bit registers on aarch64 VL > 512. CI/test infra improvements reduced build time and expanded measurement data for benchmarks, with a new Embench benchmark workflow. Overall impact: more reliable builds, better performance, and clearer performance measurements across AArch64/RISC-V targets.
April 2026
8 Commits • 4 Features
Apr 1, 2026April 2026 monthly summary for OpenVADL/openvadl: Delivered substantial improvements in code generation efficiency and correctness, resolved critical architecture-specific bugs, and strengthened CI/testing and benchmarking workflows. Key code-generation enhancements include conditional unrolling of forall loops, tensor expression to forall do transformation, and a new pass to save common scalar subexpressions, collectively enabling faster builds, reduced code size, and more robust optimization opportunities. Critical bug fixes fixed inlining of status flags to prevent leakage of Status-typed nodes into ISS passes and corrected reset/register dump handling for 64+ bit registers on aarch64 VL > 512. CI/test infra improvements reduced build time and expanded measurement data for benchmarks, with a new Embench benchmark workflow. Overall impact: more reliable builds, better performance, and clearer performance measurements across AArch64/RISC-V targets.
March 2026
9 Commits • 6 Features
Mar 1, 2026Concise monthly summary for 2026-03: Delivered foundational features, stabilized CI, and improved debugging/test capabilities across OpenVADL/Openvadl. Highlights include a first RV64UME Linux-user target for QEMU to accelerate UME integration; a new VIAM snapshot testing framework for deterministic regression checks; extended GDB register access to arbitrary definitions; decomposer bit-counting and select optimizations; and CI/test reliability improvements along with documentation tooling to keep the project maintainable and scalable.
9 Commits • 6 Features
Mar 1, 2026Concise monthly summary for 2026-03: Delivered foundational features, stabilized CI, and improved debugging/test capabilities across OpenVADL/Openvadl. Highlights include a first RV64UME Linux-user target for QEMU to accelerate UME integration; a new VIAM snapshot testing framework for deterministic regression checks; extended GDB register access to arbitrary definitions; decomposer bit-counting and select optimizations; and CI/test reliability improvements along with documentation tooling to keep the project maintainable and scalable.
March 2026
February 2026
14 Commits • 6 Features
Feb 1, 2026February 2026 (OpenVADL/openvadl): Delivered significant build/CI improvements, expanded ISA coverage, and hardened runtime robustness, driving reliability and performance for vector workloads while enhancing developer productivity through better testing and documentation tooling. Key outcomes include modernization of the docs build system, efficient parameter packing for QEMU helpers, new fold support and RV64V/SVE features, and strengthened testing and failure diagnostics.
February 2026
14 Commits • 6 Features
Feb 1, 2026February 2026 (OpenVADL/openvadl): Delivered significant build/CI improvements, expanded ISA coverage, and hardened runtime robustness, driving reliability and performance for vector workloads while enhancing developer productivity through better testing and documentation tooling. Key outcomes include modernization of the docs build system, efficient parameter packing for QEMU helpers, new fold support and RV64V/SVE features, and strengthened testing and failure diagnostics.
January 2026
16 Commits • 5 Features
Jan 1, 2026January 2026 OpenVADL monthly summary focusing on delivering business value through architectural enhancements, developer tooling improvements, and robust CI/CD. This month’s work centers on expanding compute capabilities with RISC-V vector extensions, streamlining developer workflows by integrating LSP into the CLI, and strengthening build/test infrastructure for cross-platform releases. The efforts balance immediate feature delivery with long-term maintainability and reliability, supported by a centralized build system and enhanced observability.
16 Commits • 5 Features
Jan 1, 2026January 2026 OpenVADL monthly summary focusing on delivering business value through architectural enhancements, developer tooling improvements, and robust CI/CD. This month’s work centers on expanding compute capabilities with RISC-V vector extensions, streamlining developer workflows by integrating LSP into the CLI, and strengthening build/test infrastructure for cross-platform releases. The efforts balance immediate feature delivery with long-term maintainability and reliability, supported by a centralized build system and enhanced observability.
January 2026
December 2025
15 Commits • 5 Features
Dec 1, 2025December 2025 – OpenVADL/openvadl: Delivered vector-extension breadth, improved co-simulation tooling, and core runtime enhancements with cross-architecture correctness gains. Highlights include introducing and extending RV64V/RV64IMV support with new vector instructions and updated tests; QEMU IPC handling and test infra improvements with tohost integration; core runtime scheduling and normalization improvements; architecture-wide correctness fixes for SMADDL/SMULL; and PPC64 debugging enhancements plus an internal VADL refactor for maintainability. These deliverables were implemented across multiple commits, including RV64V work (67af1ff2a19871512ecf04eeccc6f61bbd06c158, b3f4d585b4dce8cf6108d25ae217564dbc7046a4, d26048c1f1f2d82690f8d2a4c24027a6003a2cf2, bdcb04423559662a2d6e87e015e8e562a87bf3ac, 76a5d8b72a76b9c81283c09230a301f4db3187c2); testing infra (54127daf9cd94d6b7dd6b261fb78852cb5c68522, f88b94a5f9eeaeb133fdded635530904bef733e7, 91675e12d88519dd80baf47035b46108cca97acf); core runtime (cc920fd64d772684c2b443582b92b026fd6721b3, 3a3f10af65f6550be7e10475fee1668e19432802, a92fb9211ef00e8be6f05c938b020e3a9383ee69); architecture fixes (2284e5b84ecdd67ce5c28ac8ef1a5cb89c21707b, 85c813d56897563ac3740fcda13d8f32aed1c241); PPC64/debug & VADL refactor (debfdbc369b2f956c785f95d552614bae4fefa54, c8aea4ac4302c7b7644007e8734b542b8f97ec58); these efforts yield faster vector validation, more stable builds, and improved cross-arch consistency.
December 2025
15 Commits • 5 Features
Dec 1, 2025December 2025 – OpenVADL/openvadl: Delivered vector-extension breadth, improved co-simulation tooling, and core runtime enhancements with cross-architecture correctness gains. Highlights include introducing and extending RV64V/RV64IMV support with new vector instructions and updated tests; QEMU IPC handling and test infra improvements with tohost integration; core runtime scheduling and normalization improvements; architecture-wide correctness fixes for SMADDL/SMULL; and PPC64 debugging enhancements plus an internal VADL refactor for maintainability. These deliverables were implemented across multiple commits, including RV64V work (67af1ff2a19871512ecf04eeccc6f61bbd06c158, b3f4d585b4dce8cf6108d25ae217564dbc7046a4, d26048c1f1f2d82690f8d2a4c24027a6003a2cf2, bdcb04423559662a2d6e87e015e8e562a87bf3ac, 76a5d8b72a76b9c81283c09230a301f4db3187c2); testing infra (54127daf9cd94d6b7dd6b261fb78852cb5c68522, f88b94a5f9eeaeb133fdded635530904bef733e7, 91675e12d88519dd80baf47035b46108cca97acf); core runtime (cc920fd64d772684c2b443582b92b026fd6721b3, 3a3f10af65f6550be7e10475fee1668e19432802, a92fb9211ef00e8be6f05c938b020e3a9383ee69); architecture fixes (2284e5b84ecdd67ce5c28ac8ef1a5cb89c21707b, 85c813d56897563ac3740fcda13d8f32aed1c241); PPC64/debug & VADL refactor (debfdbc369b2f956c785f95d552614bae4fefa54, c8aea4ac4302c7b7644007e8734b542b8f97ec58); these efforts yield faster vector validation, more stable builds, and improved cross-arch consistency.
November 2025
25 Commits • 8 Features
Nov 1, 2025OpenVADL/Openvadl – 2025-11 monthly summary: Delivered substantial ISS core enhancements with RISC-V helper support and refactor consolidation, expanded codegen lowering capabilities, introduced a loop unrolling optimization, and implemented diagnostics improvements. Also completed VIAM core refactors and documentation updates, plus targeted bug fixes to improve correctness and stability. These changes collectively enhance ISA coverage, generation performance, and developer productivity, while reducing maintenance burden and accelerating feature delivery.
25 Commits • 8 Features
Nov 1, 2025OpenVADL/Openvadl – 2025-11 monthly summary: Delivered substantial ISS core enhancements with RISC-V helper support and refactor consolidation, expanded codegen lowering capabilities, introduced a loop unrolling optimization, and implemented diagnostics improvements. Also completed VIAM core refactors and documentation updates, plus targeted bug fixes to improve correctness and stability. These changes collectively enhance ISA coverage, generation performance, and developer productivity, while reducing maintenance burden and accelerating feature delivery.
November 2025
October 2025
2 Commits • 2 Features
Oct 1, 2025OpenVADL - 2025-10 Monthly Summary Key features delivered: - DynSliceNode introduced to enable dynamic slicing in loops and code generation, based on expressions for msb/lsb (commit 2991bd11c8c787a0b995b2883bd78cd8bb23f3df). This lays the foundation for future dynamic slicing capabilities in IR and generated code. - IssSelectLoweringPass implemented to lower IssSelectNode into control-flow graphs (CFGs), ensuring undefined behavior (e.g., division by zero) is handled safely by evaluating only the relevant branch; includes new IR nodes (IssMoveNode, IssTempExprNode) and integration into existing passes (commit 2691d99c3ca99184835ac02be4cd73964e0cadaf). Major bugs fixed: - Improved safety around undefined behavior in generated IR by lowering conditional selects to CFGs, reducing risk of runtime errors due to premature evaluation of branches. Overall impact and accomplishments: - Strengthened the code generation foundation for dynamic slicing and safer IR transformations, enabling future features and more predictable optimizations. - Improved robustness and maintainability through explicit node types and clear lowering passes, with traceable commits. Technologies/skills demonstrated: - Compiler IR design and transformation (DynSliceNode, IssSelectLoweringPass, CFG-based lowering) - Dynamic slicing concepts and loop analysis - Safe code generation practices and undefined-behavior handling - Incremental integration and strong commit traceability
October 2025
2 Commits • 2 Features
Oct 1, 2025OpenVADL - 2025-10 Monthly Summary Key features delivered: - DynSliceNode introduced to enable dynamic slicing in loops and code generation, based on expressions for msb/lsb (commit 2991bd11c8c787a0b995b2883bd78cd8bb23f3df). This lays the foundation for future dynamic slicing capabilities in IR and generated code. - IssSelectLoweringPass implemented to lower IssSelectNode into control-flow graphs (CFGs), ensuring undefined behavior (e.g., division by zero) is handled safely by evaluating only the relevant branch; includes new IR nodes (IssMoveNode, IssTempExprNode) and integration into existing passes (commit 2691d99c3ca99184835ac02be4cd73964e0cadaf). Major bugs fixed: - Improved safety around undefined behavior in generated IR by lowering conditional selects to CFGs, reducing risk of runtime errors due to premature evaluation of branches. Overall impact and accomplishments: - Strengthened the code generation foundation for dynamic slicing and safer IR transformations, enabling future features and more predictable optimizations. - Improved robustness and maintainability through explicit node types and clear lowering passes, with traceable commits. Technologies/skills demonstrated: - Compiler IR design and transformation (DynSliceNode, IssSelectLoweringPass, CFG-based lowering) - Dynamic slicing concepts and loop analysis - Safe code generation practices and undefined-behavior handling - Incremental integration and strong commit traceability
September 2025
2 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for OpenVADL/openvadl: Delivered significant enhancements to alias registers, featuring wildcard access and overwrite semantics. Frontend changes implemented to support wildcard argument handling and refined alias register slicing for safety. No standalone bug fixes documented this month; focus on feature delivery that improves flexibility, safety, and developer productivity.
2 Commits • 1 Features
Sep 1, 2025September 2025 monthly summary for OpenVADL/openvadl: Delivered significant enhancements to alias registers, featuring wildcard access and overwrite semantics. Frontend changes implemented to support wildcard argument handling and refined alias register slicing for safety. No standalone bug fixes documented this month; focus on feature delivery that improves flexibility, safety, and developer productivity.
September 2025
August 2025
2 Commits • 1 Features
Aug 1, 2025August 2025 monthly summary for OpenVADL/openvadl: Implemented alias slice support across the type system and VHDL lowering. This feature enables type-checking of alias slices on registers and their lowering to VIAM, expanding aliasing capabilities and improving correctness for slice-based register aliases. The work enhances robustness, reduces downstream debugging, and establishes groundwork for future slice-aware optimizations. Key outcomes include improved type safety, automated translation to VIAM, and a more maintainable codegen path.
August 2025
2 Commits • 1 Features
Aug 1, 2025August 2025 monthly summary for OpenVADL/openvadl: Implemented alias slice support across the type system and VHDL lowering. This feature enables type-checking of alias slices on registers and their lowering to VIAM, expanding aliasing capabilities and improving correctness for slice-based register aliases. The work enhances robustness, reduces downstream debugging, and establishes groundwork for future slice-aware optimizations. Key outcomes include improved type safety, automated translation to VIAM, and a more maintainable codegen path.
July 2025
2 Commits • 1 Features
Jul 1, 2025July 2025 monthly summary for OpenVADL/openvadl: Delivered key formatting enhancements and corrected codegen behavior, driving migration readiness and code reliability.
2 Commits • 1 Features
Jul 1, 2025July 2025 monthly summary for OpenVADL/openvadl: Delivered key formatting enhancements and corrected codegen behavior, driving migration readiness and code reliability.
July 2025
June 2025
17 Commits • 7 Features
Jun 1, 2025June 2025 monthly summary: Delivered targeted features and stability improvements across the core OpenVADL/Openvadl stack, with a strong emphasis on correctness, performance, and tooling quality. Key feature work includes integrating an undefined-when annotation for AArch64 (with decoder integration and test/annotation coverage), expanding AArch64 test coverage for ADDW/SUBW shift instructions and updating the VADL model to handle shifts with proper type casting, and enabling VIAM language enhancements for forall loops (do, tensor, fold) with corresponding AST, codegen, and normalization integration. On the codegen and optimization front, we implemented control-flow optimization and inlining for constant-condition branches, cleaned up unused TCG conditions, and advanced select-node optimization to reduce runtime overhead. We inlined division-by-status builtins (SDIVS/UDIVS) with improved division-by-zero/overflow handling and extended tests. Lowering CTZ/COB to TCG and expanding ISS normalization to support CZB/COB nodes, plus related ROR normalization fixes, strengthened backend robustness. Additionally, CPU state/dataflow analysis improvements and AutoAssembler testing support improved reliability of state handling and automation coverage. Finally, CI/benchmarking and build alignment improvements reduced maintenance burden and improved feedback cycles (old CI cleanup, benchmark/script alignments, and including primecount benchmarks).
June 2025
17 Commits • 7 Features
Jun 1, 2025June 2025 monthly summary: Delivered targeted features and stability improvements across the core OpenVADL/Openvadl stack, with a strong emphasis on correctness, performance, and tooling quality. Key feature work includes integrating an undefined-when annotation for AArch64 (with decoder integration and test/annotation coverage), expanding AArch64 test coverage for ADDW/SUBW shift instructions and updating the VADL model to handle shifts with proper type casting, and enabling VIAM language enhancements for forall loops (do, tensor, fold) with corresponding AST, codegen, and normalization integration. On the codegen and optimization front, we implemented control-flow optimization and inlining for constant-condition branches, cleaned up unused TCG conditions, and advanced select-node optimization to reduce runtime overhead. We inlined division-by-status builtins (SDIVS/UDIVS) with improved division-by-zero/overflow handling and extended tests. Lowering CTZ/COB to TCG and expanding ISS normalization to support CZB/COB nodes, plus related ROR normalization fixes, strengthened backend robustness. Additionally, CPU state/dataflow analysis improvements and AutoAssembler testing support improved reliability of state handling and automation coverage. Finally, CI/benchmarking and build alignment improvements reduced maintenance burden and improved feedback cycles (old CI cleanup, benchmark/script alignments, and including primecount benchmarks).
May 2025
105 Commits • 55 Features
May 1, 2025May 2025 focused on strengthening OpenVADL/openvadl’s processor modeling, memory region handling, symbol resolution, and ISA coverage, while stabilizing CI and test workflows. Key deliverables include frontend grammar and processor lifecycle refactor, memory region support with ISS integration, expanded symbol resolution and annotation tooling, and RV32 CSR generation/spec support in ISS, all aimed at increasing simulation fidelity, hardware ISA coverage, and development velocity.
105 Commits • 55 Features
May 1, 2025May 2025 focused on strengthening OpenVADL/openvadl’s processor modeling, memory region handling, symbol resolution, and ISA coverage, while stabilizing CI and test workflows. Key deliverables include frontend grammar and processor lifecycle refactor, memory region support with ISS integration, expanded symbol resolution and annotation tooling, and RV32 CSR generation/spec support in ISS, all aimed at increasing simulation fidelity, hardware ISA coverage, and development velocity.
May 2025
April 2025
83 Commits • 28 Features
Apr 1, 2025April 2025 (OpenVADL/openvadl) focused on stabilizing CI/CD, improving docs publishing, modernizing the build system, and advancing core architecture with the RegisterTensor migration across VIAM/MI A/ISS. The efforts delivered tangible business value through more reliable release processes, clearer versioning, and a stronger build/test foundation, while expanding developer onboarding and documentation.
April 2025
83 Commits • 28 Features
Apr 1, 2025April 2025 (OpenVADL/openvadl) focused on stabilizing CI/CD, improving docs publishing, modernizing the build system, and advancing core architecture with the RegisterTensor migration across VIAM/MI A/ISS. The efforts delivered tangible business value through more reliable release processes, clearer versioning, and a stronger build/test foundation, while expanding developer onboarding and documentation.
March 2025
61 Commits • 26 Features
Mar 1, 2025March 2025 OpenVADL/openvadl monthly summary focused on strengthening foundations, boosting developer velocity, and advancing cross‑platform readiness. Delivered a robust build and CI foundation, advanced language and tooling capabilities, and improved test stability and documentation hygiene to accelerate business value across development and deployment pipelines.
61 Commits • 26 Features
Mar 1, 2025March 2025 OpenVADL/openvadl monthly summary focused on strengthening foundations, boosting developer velocity, and advancing cross‑platform readiness. Delivered a robust build and CI foundation, advanced language and tooling capabilities, and improved test stability and documentation hygiene to accelerate business value across development and deployment pipelines.
March 2025
February 2025
65 Commits • 31 Features
Feb 1, 2025February 2025 (OpenVADL/openvadl) delivered targeted codegen cleanup, performance-oriented ISS optimizations, relocation and lowering stability improvements, RISCV spec integration, and native tooling enhancements. These changes collectively strengthen reliability, performance, and extensibility of the OpenVADL toolchain, enabling faster iteration, more robust validation, and broader target support.
February 2025
65 Commits • 31 Features
Feb 1, 2025February 2025 (OpenVADL/openvadl) delivered targeted codegen cleanup, performance-oriented ISS optimizations, relocation and lowering stability improvements, RISCV spec integration, and native tooling enhancements. These changes collectively strengthen reliability, performance, and extensibility of the OpenVADL toolchain, enabling faster iteration, more robust validation, and broader target support.
January 2025
26 Commits • 11 Features
Jan 1, 2025January 2025 monthly summary for OpenVADL/openvadl: Delivered substantive ISS/TCG improvements, debugging enhancements, and CI/benchmark stabilization, with strengthened 64-bit RISC-V support. Key features include ISS: Translation and TCG optimization enabling multi-destination TCGv, added SDIV/UDIV/SelectNode/SREM/UREM support, improved jump-slot assignment, and long multiplication decomposition for 64-bit architectures; refactored TCG Context and variable assignment; removal of unused code paths. VIAM: fixed ExpressionNode copy() to consistently return an ExpressionNode. PASS/EMBench/CI: enhanced exception dumps for debugging; timing adjustments for embench and spike board set to 10 MHz; embench now runs on rv64im for accuracy. CLI/CI/QC: fixed a CLI typo, set GraalVM JDK in misc.xml, suppressed a Checkstyle warning, added RV64 M extension tests, ISS test gating via environment variable, fixed the first ISS test and InstrInfoTableGen snapshot; added documentation and DefinitionExtension metadata; ran embench on rv64im for validation.
26 Commits • 11 Features
Jan 1, 2025January 2025 monthly summary for OpenVADL/openvadl: Delivered substantive ISS/TCG improvements, debugging enhancements, and CI/benchmark stabilization, with strengthened 64-bit RISC-V support. Key features include ISS: Translation and TCG optimization enabling multi-destination TCGv, added SDIV/UDIV/SelectNode/SREM/UREM support, improved jump-slot assignment, and long multiplication decomposition for 64-bit architectures; refactored TCG Context and variable assignment; removal of unused code paths. VIAM: fixed ExpressionNode copy() to consistently return an ExpressionNode. PASS/EMBench/CI: enhanced exception dumps for debugging; timing adjustments for embench and spike board set to 10 MHz; embench now runs on rv64im for accuracy. CLI/CI/QC: fixed a CLI typo, set GraalVM JDK in misc.xml, suppressed a Checkstyle warning, added RV64 M extension tests, ISS test gating via environment variable, fixed the first ISS test and InstrInfoTableGen snapshot; added documentation and DefinitionExtension metadata; ran embench on rv64im for validation.
January 2025
November 2024
1 Commits
Nov 1, 2024November 2024 (OpenVADL/openvadl): Generalized truncation generation across all bit widths, replacing a conditional-specific approach with a single, uniform implementation. This fixes the truncation generation for 32-bit integers and improves correctness, consistency, and maintainability across 8/16/32-bit truncations. The change reduces edge-case risk and aligns behavior with the project's design goals. Impact includes improved reliability in downstream components, easier future enhancements, and cleaner integration with the truncation framework.
November 2024
1 Commits
Nov 1, 2024November 2024 (OpenVADL/openvadl): Generalized truncation generation across all bit widths, replacing a conditional-specific approach with a single, uniform implementation. This fixes the truncation generation for 32-bit integers and improves correctness, consistency, and maintainability across 8/16/32-bit truncations. The change reduces edge-case risk and aligns behavior with the project's design goals. Impact includes improved reliability in downstream components, easier future enhancements, and cleaner integration with the truncation framework.
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Quality Metrics
Correctness89.8%
Maintainability86.4%
Architecture86.4%
Performance81.4%
AI Usage23.4%
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AArch64AArch64 ArchitectureAArch64 architectureAPI DesignARM ArchitectureAST ManipulationAST manipulationAarch32Abstract Syntax Tree (AST)Abstract Syntax Tree (AST) ManipulationAbstract Syntax TreesAbstract Syntax Trees (AST)Annotation ProcessingArchitecture DefinitionArchitecture Definition Language
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