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Changelog

Source: NEWS.md

RsimdDispatch 0.1.2.9001

  • Fix template generation: .def files (operations.def, signatures.def, backends.def) are now treated as text and receive prefix substitution when use_simd_dispatch() deploys the scaffold — previously they were binary-copied, causing the generated configure to fail to compile.
  • Fix prefix substitution: use boundary-aware regex (\b) for all four C-prefix patterns so that env-var names like RSD_LOG_PREFIX and shell variables like SRC_DIR_PATH are no longer mangled in generated packages.
  • Fix simd_backend() test: allow "partial:<name>" return value when an explicitly-selected backend implements only a subset of operations (e.g. SSE2/SSE41 implement count_nonzero but not convolve1d).
  • Fix sd_register_kernel_table() sentinel: detect the canonical sentinel {SD_OP_COUNT, SD_SIG_NONE, NULL} explicitly; a NULL invoke on any other row is now an error rather than silently truncating the table.
  • Add operation and signature catalog order-invariant checks in sd_init_dispatch() to catch mis-ordered .def files at startup.
  • Use the CallType argument in signatures.def to generate a SdSignatureCatalogEntry catalog with name and call_size (sizeof(call_type)); expose sd_signature_name() in the public API.
  • Update simd_info() documentation to list "partial:<name>" as a possible selected_backend value.
  • Update vignette build-layout table: dispatch core and CPU feature detection are staged in src/rsd-lib/, not compiled by the ordinary src/Makevars path.

RsimdDispatch 0.1.2.9000

  • Open the post-0.1.2 development cycle.
  • Clarify many-operation maintenance guidance: repetitive dispatch metadata, C registration, and R wrapper metadata should come from one source of truth; hand-written code should focus on backend kernels.
  • Move the downstream-use vignette after runtime dispatch semantics in the pkgdown article order and shorten its many-operation guidance.
  • Trim redundant backend-selection wording from README and dispatch semantics documentation.
  • Move the staged-kernel-only kernel_common.h helper from src/ into tools/simdDispatch/kernels/ and the copied template kernel directory, and update downstream-template docs for that layout.
  • Replace short-lived C preprocessor expansion blocks in src/ with explicit operation-table declarations, dispatch wrappers, and native registration entries.
  • Move dispatch to a NumKong-inspired resolved operation table: backend files register the operation slots they implement, "auto" resolves the best backend per operation, and simd_info() reports both operation-level backend availability and the selected backend for each operation.
  • Add Dockerfile.musl-check for Alpine Linux / musl R CMD check smoke testing in repository-specific CI.
  • Split the staged-kernel registration ABI into tools/simdDispatch/kernels/kernel_api.h so backend kernels no longer include private dispatch headers from src/. Backend files now expose SdKernelDef tables consumed by the generic dispatch core, keeping operation names and operation-specific wrappers out of tools/simdDispatch/simd_dispatch.c.

RsimdDispatch 0.1.2

  • Add WebAssembly SIMD128 (wasm_simd128) staged-kernel support for Emscripten/webR builds using SIMDe’s <simde/wasm/simd128.h> backend and SIMDE_WASM_SIMD128_NATIVE configure probing.
  • Extend simd_info() diagnostics with cpu_wasm_simd128 and include wasm_simd128 in compiled, available, and SIMDe-native backend sets when built by a SIMD128-capable WebAssembly toolchain.
  • Add webR check tooling based on the local rwasm::build() + Node webr workflow used by related packages.
  • Generate explicit SIMDe include flags in src/Makevars and quote configure include paths so copied templates are more robust in downstream libraries.
  • Eagerly initialize dispatch at package load, exercise copied-template runtime behavior in CI, and remove legacy comma-separated backend-list C helpers.
  • Switch dispatch from one function pointer per operation to a backend SdKernelDef operation table. Backend diagnostics now reuse the C backend metadata table, and the R setter no longer hardcodes backend names.
  • Add a dispatched convolve1d() full one-dimensional convolution demo, using SIMDe inner-loop multiply-add kernels for numeric vectors, and include it in tests, documentation, webR checks, and evaluated benchmarks.
  • Document the current extension path for adding operations while retaining RsimdDispatch’s staged-object R package build model.

RsimdDispatch 0.1.1 (2026-05-28)

  • Stage scalar and optional SIMD kernel objects during configure, then link them through generated src/Makevars with the baseline R API, CPU feature detection, and dispatcher code.
  • Move demo kernels from src/ to tools/simdDispatch/kernels/ so copied templates keep build-time kernel sources separate from ordinary R package src/ files.
  • Reword DESCRIPTION to avoid incoming spell-check notes for backend acronym names while keeping detailed backend names in user-facing documentation.

RsimdDispatch 0.1.0

Initial release.

  • Provides a working runtime SIMD dispatch example for R packages, using one shared library with scalar, SSE2, SSE4.1, AVX2, AVX-512, and NEON kernel objects where supported by the compiler and CPU.
  • Exports count_nonzero(), simd_set_backend(), simd_backend(), and simd_info() to demonstrate safe same-process backend selection and diagnostics.
  • Adds use_simd_dispatch() and simd_dispatch_template_path() for package authors who want to copy and adapt the C dispatch scaffold.
  • Vendors the header-only SIMDe library for downstream packages through LinkingTo: RsimdDispatch.
  • Adds simde_info() and SIMDe fields in simd_info() to report the vendored SIMDe version and pinned upstream commit.