nimsimd

nimble install nimsimd

This repo provides pleasant Nim bindings for various SIMD instructions.

Each SIMD instruction set is in its own file for importing.

AVX-512 extensions are organized by processor generation for convenience:

Individual extensions are also available under avx512/ (e.g., avx512/f, avx512/bw, avx512/vnni).

Some instruction sets require additional compiler flags to compile. I suggest putting any code that uses these instructions into its own .nim file and adding a localPassc pragma to the top of that file as needed, such as:

import nimsimd/sse42

when defined(gcc) or defined(clang):
  {.localPassc: "-msse4.2".}

...

You can also check if instruction sets are available at runtime:

import nimsimd/runtimecheck

echo checkInstructionSets({SSE41, PCLMULQDQ})

NEON bindings are started but experimental. Much to learn here about versioning and compilers.

• Pixie uses SIMD for faster 2D drawing.
• Crunchy uses SIMD for faster hashing and checksums.
• Noisy uses SIMD to accelerate generating coherent noise.

nimble test