SIMD Libraries

x86-64 SIMD vector types and type-safe wrappers for SIMD intrinsics. This library requires the simd and layouts compiler extensions.

Currently, 128-bit types (int8x16#, int16x8#, int32x4#, int64x2#, float32x4#, float64x2#) and operations up to SSE4.2 are available.

To use SIMD in your program, add the library ocaml_simd_sse and the PPX ppx_simd to your jbuild.

• ocaml_simd_sse provides SSE types and operations. See the interface files under /sse for details.

• ppx_simd provides convenient type-checked syntax for specifying constants that modify the behavior of SIMD instructions. See /ppx for details.

• Note that the ocaml_simd library only provides cross-instruction-set abstract types and constant definitions. You do not need to depend on this library directly. Instead, these constants may be generated by ppx_simd. See /src for details.

• A sexp parser may be found in ocaml_simd_sexp. It uses SIMD instructions to achieve a performance improvement over sexplib's parser. See /sexp for details.

This set of libraries is intended for low-level use cases, and will form the basis for a higher-level array-processing library.