Function core::arch::wasm32::u16x8_bitmask

pub fn u16x8_bitmask(a: v128) -> u8

This is supported on (non-crate feature miri-test-libstd or test or doctest) and WebAssembly and target feature simd128 only.

Extracts the high bit for each lane in a and produce a scalar mask with all bits concatenated.