For current status ("phase 3" as that link says is maybe not obvious enough), there is a solid spec and multiple implementations, see the "Fixed-width SIMD" lin

For current status ("phase 3" as that link says is maybe not obvious enough), there is a solid spec and multiple implementations, see the "Fixed-width SIMD" line here: https://webassembly.org/roadmap/ https://webassembly.org/roadmap/ And here is an overview of this spec: https://github.com/WebAssembly/simd/blob/master/proposals/simd/SIMD.md https://github.com/WebAssembly/simd/blob/master/proposals/si...