OpenVADL/openvadl
Mar 2026 – Jul 2026
5 Months active
Languages Used
JavaMakefilePythonTOMLCVADLC++
Technical Skills
JavaJava programmingPython scriptingback end developmentbackend developmentbuild configuration
florianmalicky
PROFILE
Florianmalicky
Worked on the OpenVADL/openvadl repository, delivering fourteen new features over five months focused on instruction set simulation, compiler infrastructure, and embedded systems. Developed dynamic instruction width handling in the VADL graph, enhanced AArch32 virtualization and boot stability, and implemented robust CPU state testing frameworks. Leveraged Java, Python, and C to refactor compiler passes, automate test infrastructure, and improve data flow analysis. Addressed cross-system endianness, program counter safety, and co-simulation with QEMU, emphasizing correctness, portability, and maintainability. The work demonstrated depth in backend development, architecture modeling, and toolchain automation, resulting in a more scalable and reliable simulation and validation pipeline.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
35Total
Bugs
0
Commits
35
Features
14
Lines of code
6,732
Activity Months5
Your Network
32 peopleSame Organization
@student.tuwien.ac.at8
Matthias RaschhoferMember
Alexander RiparMember
kevinMember
Benjamin KasperMember
tmagesMember
Tobias WeissMember
Benedikt FuchsMember
Linus HalderMember
Shared Repositories
24
Andreas KrallMember
Benedikt HuberMember
Giftzwerg02Member
Matthias RaschhoferMember
Alexander RiparMember
kevinMember
Benjamin KasperMember
tmagesMember
Tobias WeissMember
Work History
July 2026
1 Commits • 1 Features
Jul 1, 2026July 2026 monthly summary for OpenVADL/openvadl. Delivered dynamic instruction width support in the VADL graph by introducing InstructionWidthNode, refactoring PcOffsetPass to compute program counters using the new node, and updating multiple compiler passes to recognize the node type. This enables dynamic width handling in the IR, reduces reliance on hardcoded constants, and lays groundwork for future ISA extensions and optimizations. Impact: more scalable and maintainable compiler pipeline, enabling faster adaptation to evolving instruction widths and improved code generation paths. No major bugs fixed this month. Technologies demonstrated: IR design, graph-based representation, compiler passes orchestration, and careful refactoring with commit-driven development.
1 Commits • 1 Features
Jul 1, 2026July 2026 monthly summary for OpenVADL/openvadl. Delivered dynamic instruction width support in the VADL graph by introducing InstructionWidthNode, refactoring PcOffsetPass to compute program counters using the new node, and updating multiple compiler passes to recognize the node type. This enables dynamic width handling in the IR, reduces reliance on hardcoded constants, and lays groundwork for future ISA extensions and optimizations. Impact: more scalable and maintainable compiler pipeline, enabling faster adaptation to evolving instruction widths and improved code generation paths. No major bugs fixed this month. Technologies demonstrated: IR design, graph-based representation, compiler passes orchestration, and careful refactoring with commit-driven development.
July 2026
June 2026
6 Commits • 4 Features
Jun 1, 2026June 2026 monthly summary for OpenVADL/openvadl focused on delivering robust validation and co-simulation capabilities for the ISS and AArch32, along with targeted performance and correctness improvements in data-flow analysis. The work tightened release readiness by expanding automated verification, clarifying boot/sequencing behavior, and fixing a critical multiplication decomposition bug in AArch32.
June 2026
6 Commits • 4 Features
Jun 1, 2026June 2026 monthly summary for OpenVADL/openvadl focused on delivering robust validation and co-simulation capabilities for the ISS and AArch32, along with targeted performance and correctness improvements in data-flow analysis. The work tightened release readiness by expanding automated verification, clarifying boot/sequencing behavior, and fixing a critical multiplication decomposition bug in AArch32.
May 2026
20 Commits • 6 Features
May 1, 2026May 2026 — OpenVADL/openvadl: Delivered PC safety enhancements, AArch32 virtualization and boot sequence stabilization, ISA enhancements, counter access translation improvements, and test infrastructure tooling. Key features delivered span (1) Program Counter Aliasing, Annotations, and Safety with PC aliasing, current/next/nextnext annotations, diagnostics, and tests, (2) AArch32 Virtualization, Boot Sequence, and Stability with virt.vadl spec, boot/flash adjustments, and disabled unsupported instructions to improve build stability and semihosting handling, (3) AArch32 ISA Enhancements adding missing built-ins and RRX/rrxs, with tests and updated frontend passes, (4) Counter Access Translation Improvement enabling non-constant indexed counter access handling and refined PC read lowering, (5) AArch32 Test Infrastructure Tooling introducing aarch32_compiler.py to automate test artifact generation, and (6) ISA Frontend and Execution State Endian/Test Coverage improving endianness tests and execution-state snapshot checks. Overall, the month increased correctness, safety, portability, and test coverage, reducing regression risk and accelerating validation. **Business value and technical focus:** strengthened PC semantics for reliable code generation, stabilized AArch32 paths for broader platform support, expanded ISA coverage for performance and optimization, improved dataflow correctness via advanced counter translation, and boosted testing automation to shorten debug cycles.
20 Commits • 6 Features
May 1, 2026May 2026 — OpenVADL/openvadl: Delivered PC safety enhancements, AArch32 virtualization and boot sequence stabilization, ISA enhancements, counter access translation improvements, and test infrastructure tooling. Key features delivered span (1) Program Counter Aliasing, Annotations, and Safety with PC aliasing, current/next/nextnext annotations, diagnostics, and tests, (2) AArch32 Virtualization, Boot Sequence, and Stability with virt.vadl spec, boot/flash adjustments, and disabled unsupported instructions to improve build stability and semihosting handling, (3) AArch32 ISA Enhancements adding missing built-ins and RRX/rrxs, with tests and updated frontend passes, (4) Counter Access Translation Improvement enabling non-constant indexed counter access handling and refined PC read lowering, (5) AArch32 Test Infrastructure Tooling introducing aarch32_compiler.py to automate test artifact generation, and (6) ISA Frontend and Execution State Endian/Test Coverage improving endianness tests and execution-state snapshot checks. Overall, the month increased correctness, safety, portability, and test coverage, reducing regression risk and accelerating validation. **Business value and technical focus:** strengthened PC semantics for reliable code generation, stabilized AArch32 paths for broader platform support, expanded ISA coverage for performance and optimization, improved dataflow correctness via advanced counter translation, and boosted testing automation to shorten debug cycles.
May 2026
April 2026
3 Commits • 1 Features
Apr 1, 2026OpenVADL/openvadl — April 2026: Delivered major enhancements to the disassembler translation pipeline and execution-state handling, with a focus on PPC64 support and runtime reliability. Key progress includes consolidation of translation block exit handling (DISAS_EXIT), TB state recovery, and simple-register execution-state annotation. Implemented robust TB state value recovery from TB state flags and ensured execution-state annotations reference format information when applicable. These changes reduce crash surfaces, improve translation integrity, and enable more accurate QEMU PPC64 behavior.
April 2026
3 Commits • 1 Features
Apr 1, 2026OpenVADL/openvadl — April 2026: Delivered major enhancements to the disassembler translation pipeline and execution-state handling, with a focus on PPC64 support and runtime reliability. Key progress includes consolidation of translation block exit handling (DISAS_EXIT), TB state recovery, and simple-register execution-state annotation. Implemented robust TB state value recovery from TB state flags and ensured execution-state annotations reference format information when applicable. These changes reduce crash surfaces, improve translation integrity, and enable more accurate QEMU PPC64 behavior.
March 2026
5 Commits • 2 Features
Mar 1, 2026March 2026 monthly summary for OpenVADL/openvadl: Delivered cross-system endianness standardization with a focus on big-endian support and performance-oriented cosimulation configuration. Implemented annotation-based endianness control across memory definitions, ISS, and PPC64; aligned code generation and build scripts to honor per-memory endianness and improve portability.
5 Commits • 2 Features
Mar 1, 2026March 2026 monthly summary for OpenVADL/openvadl: Delivered cross-system endianness standardization with a focus on big-endian support and performance-oriented cosimulation configuration. Implemented annotation-based endianness control across memory definitions, ISS, and PPC64; aligned code generation and build scripts to honor per-memory endianness and improve portability.
March 2026
Activity
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Quality Metrics
Correctness89.8%
Maintainability81.8%
Architecture84.6%
Performance80.6%
AI Usage39.4%
Skills & Technologies
Programming Languages
CC++JavaMakefilePythonTOMLVADL
Technical Skills
AArch32AST TransformationArchitecture ModelingAssemblyBackend DevelopmentC programmingCompiler DesignEmbedded SystemsInfrastructureInstruction Set ArchitectureInstruction Set SimulationJavaJava developmentJava programmingLinker Scripts
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