aseprite/libpng
Mar 2025 – Jul 2025
4 Months active
Languages Used
CCMakeShellMakefile
Technical Skills
AssemblyBuild SystemsLow-level programmingOptimizationAutotoolsC Programming
Filip Wasil
PROFILE
Filip Wasil
Worked on accelerating libpng in the aseprite/libpng repository by implementing RISC-V Vector (RVV) optimizations, focusing on both performance and maintainability. Over four months, delivered RVV-based filter row processing using C and assembly, integrated new build options, and transitioned RVV support from runtime to compile-time checks. Enhanced the build system with Autotools and CMake, improved detection and flag handling, and refactored code to use C intrinsics for vector operations. Documentation and naming consistency were improved, and legacy runtime detection was removed, resulting in a streamlined, reliable RVV 1.0 integration that simplifies future maintenance and supports RISC-V platforms.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
14Total
Bugs
0
Commits
14
Features
4
Lines of code
1,939
Activity Months4
Your Network
207 peopleWork History
July 2025
2 Commits • 1 Features
Jul 1, 2025July 2025 monthly summary: Delivered targeted RISC-V Vector (RVV) 1.0 support for libpng, focusing on maintainability and determinism. Refactored RVV integration to a compile-time check, removing runtime detection and related files (README, linux.c), and streamlined initialization paths.
2 Commits • 1 Features
Jul 1, 2025July 2025 monthly summary: Delivered targeted RISC-V Vector (RVV) 1.0 support for libpng, focusing on maintainability and determinism. Refactored RVV integration to a compile-time check, removing runtime detection and related files (README, linux.c), and streamlined initialization paths.
July 2025
June 2025
7 Commits • 1 Features
Jun 1, 2025June 2025: Focused on enabling RISC-V RVV vectorization in aseprite/libpng and stabilizing related build and runtime paths. Consolidated commit set that enables RVV support, improves detection and runtime availability checks, stabilizes autotools and CMake build flows, avoids overwriting of compiler flags during SIMD detection, and refactors filters to use C intrinsics. Also performed targeted code cleanup and runtime check simplifications to improve maintainability and reliability.
June 2025
7 Commits • 1 Features
Jun 1, 2025June 2025: Focused on enabling RISC-V RVV vectorization in aseprite/libpng and stabilizing related build and runtime paths. Consolidated commit set that enables RVV support, improves detection and runtime availability checks, stabilizes autotools and CMake build flows, avoids overwriting of compiler flags during SIMD detection, and refactors filters to use C intrinsics. Also performed targeted code cleanup and runtime check simplifications to improve maintainability and reliability.
May 2025
4 Commits • 1 Features
May 1, 2025For 2025-05, focused on delivering RISC-V RVV vector optimizations in libpng (aseprite/libpng). Completed integration with a new build option, updated run-time checks for RVV availability, and improved documentation and naming consistency for RVV support. Addressed build-system issues in autotools to ensure reliable activation of RVV paths. This work lays groundwork for significant performance gains on RISC-V platforms and improves maintainability.
4 Commits • 1 Features
May 1, 2025For 2025-05, focused on delivering RISC-V RVV vector optimizations in libpng (aseprite/libpng). Completed integration with a new build option, updated run-time checks for RVV availability, and improved documentation and naming consistency for RVV support. Addressed build-system issues in autotools to ensure reliable activation of RVV paths. This work lays groundwork for significant performance gains on RISC-V platforms and improves maintainability.
May 2025
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025: Delivered RISC-V Vector (RVV) acceleration and refactor for libpng (aseprite/libpng). Implemented RVV-based acceleration with new intrinsics for optimized filter row processing, updated the build system to reflect 'rvv' naming, and added a Linux-specific runtime check to ensure RVV support before usage. Completed a comprehensive code cleanup renaming macros/files/functions from 'vector' to 'rvv' for clarity. Also performed targeted fixes and improvements to the RVV path, enhancing stability and performance (commit: ffb8e8b26f2c18798863a173945cf4f292ab1f0a).
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025: Delivered RISC-V Vector (RVV) acceleration and refactor for libpng (aseprite/libpng). Implemented RVV-based acceleration with new intrinsics for optimized filter row processing, updated the build system to reflect 'rvv' naming, and added a Linux-specific runtime check to ensure RVV support before usage. Completed a comprehensive code cleanup renaming macros/files/functions from 'vector' to 'rvv' for clarity. Also performed targeted fixes and improvements to the RVV path, enhancing stability and performance (commit: ffb8e8b26f2c18798863a173945cf4f292ab1f0a).
Activity
Loading activity data...
Quality Metrics
Correctness87.2%
Maintainability83.6%
Architecture83.6%
Performance79.2%
AI Usage21.4%
Skills & Technologies
Programming Languages
CCMakeMakefileShell
Technical Skills
AssemblyAutotoolsBuild SystemsC ProgrammingC programmingCode RefactoringCompiler DevelopmentCompiler FlagsCompiler IntrinsicsCompiler OptimizationCompiler OptimizationsDocumentationEmbedded SystemsLow-Level ProgrammingLow-level Programming
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline