March 2026 performance summary highlighting key API enhancements, stability fixes, and expanded test coverage across two DirectX Shader Compiler repositories.

February 2026: Delivered a major feature expansion for DirectXShaderCompiler focused on Vulkan/SPIR-V texture sampling. Implemented a comprehensive vk::SampledTexture2D pathway, delivering an extensive set of APIs for advanced texture sampling, LOD control, and dimension queries, enabling richer rendering and improved shader portability. The work spans new resource type, sampling methods (Sample, SampleCmp, SampleGrad, Gather variants), LevelOfDetail calculations (with and without clamping), GetDimensions, and Load capabilities, plus full method parity for remaining Sample...() and Gather...() operations.

January 2026 monthly summary for Esri/DirectXShaderCompiler focusing on correctness and stability of SPIR-V emission for HLSL vector types. Delivered targeted enhancement to vector element assignments for the asuint intrinsic in the SPIR-V emitter, improving low/high bit handling and vector swizzle correctness to produce more accurate SPIR-V code.

December 2025 performance summary for Esri/DirectXShaderCompiler. Focused on delivering feature enhancements to expand shader compilation capabilities and improve interoperability with SPIR-V. Key feature delivered this month: asdouble() support for uint3 and uint4 in the SPIR-V emitter, enabling conversion of 3- and 4-component unsigned integer vectors to double-precision vectors within the SPIR-V emission path. This work strengthens the compiler’s support for advanced shader patterns and broadens the set of valid inputs for downstream SPIR-V pipelines.

November 2025 focused on correctness and compatibility improvements in Esri/DirectXShaderCompiler. No new features shipped this month; emphasis was on stabilizing shader math and aligning with HLSL semantics. Delivered a targeted bug fix for dot2add precision in the SPIR-V path to ensure accurate dot products and reduce rendering discrepancies across platforms.

October 2025: Delivered core SPIR-V generation enhancements and dependency updates to support higher-performance, more portable shaders. Implemented maximal reconvergence in SPIR-V, added non-uniform indexing for StructuredBuffer, and refreshed SPIRV-Tools dependencies to align with latest commits. These changes improve shader efficiency, compatibility, and maintainability across the Swift/HLSL/LLVM toolchain and DirectXShaderCompiler.

Month: 2025-09 — microsoft/DirectXShaderCompiler. Focused on dependency maintenance to support a stable DXC release. Delivered SPIRV-Tools submodule update to a newer release as part of routine maintenance for microsoft/DirectXShaderCompiler (commit d72f75ee338ea8515a17ea49467bbffdeb9e2cbe, 'Update submodules for new dxc release (#7781)'). No major bugs fixed in this period for this repository.