Report runtime SIMD dispatch diagnostics — simd

Returns the requested backend, selected backend, compiled backends, CPU-supported backends, operation-level backend availability, operation-level selected backends, SIMDe-native backends, and target architecture information. Calling this initializes the lazy auto-dispatch selection if it has not already been initialized. For SIMDe provenance (version, commit, date) use simde_info().

Usage

simd_info()

Value

A named list with the following elements:

dispatch_mode: Character scalar. Internal dispatch implementation strategy string (stable across patch releases).
requested_backend: Character scalar. The last value passed to simd_set_backend(), or "auto" if not explicitly set.
selected_backend: Character scalar. Summary of the currently active backend: a backend name, "mixed", or "unavailable".
compiled_backends: Character vector. Backends compiled into the shared library (not necessarily supported by the current CPU).
cpu_supported_backends: Character vector. Backends whose required CPU features are present at runtime.
available_backends: Character vector. Backends that are both compiled and CPU-supported (i.e. usable).
simde_native_backends: Character vector. Backends for which the compiler emitted native intrinsics rather than SIMDe emulation.
operations: Character vector. Names of registered operations (e.g. "count_nonzero", "convolve1d").
operation_backends: Named list of character vectors. For each operation, the backends that provide a kernel for it.
operation_selected_backends: Named character vector. For each operation, the backend currently selected for dispatch (or NA if none is resolved).
cpu_sse2: Logical scalar. TRUE if SSE2 is detected at runtime.
cpu_sse41: Logical scalar. TRUE if SSE4.1 is detected.
cpu_avx2: Logical scalar. TRUE if AVX2 is detected.
cpu_avx512: Logical scalar. TRUE if AVX-512 (F/BW/VL) is detected.
cpu_neon: Logical scalar. TRUE if NEON/AdvSIMD is detected.
cpu_wasm_simd128: Logical scalar. TRUE if WASM SIMD128 is available.
target_arch: Character scalar. Compiler target CPU architecture (e.g. "x86_64", "aarch64").
target_os: Character scalar. Compiler target OS family (e.g. "linux", "macos", "windows", "emscripten").

Examples

names(simd_info())
#>  [1] "dispatch_mode"               "requested_backend"          
#>  [3] "selected_backend"            "compiled_backends"          
#>  [5] "cpu_supported_backends"      "available_backends"         
#>  [7] "simde_native_backends"       "operations"                 
#>  [9] "operation_backends"          "operation_selected_backends"
#> [11] "cpu_sse2"                    "cpu_sse41"                  
#> [13] "cpu_avx2"                    "cpu_avx512"                 
#> [15] "cpu_neon"                    "cpu_wasm_simd128"           
#> [17] "target_arch"                 "target_os"