WebAssembly SIMD extract instructions

WebAssembly SIMD extract instructions.

extract_lane

Extracts the value contained within the specified lane of a v128 value interpretation.

extract_lane_s

Extracts the value contained within the specified lane of a v128 value interpretation as a signed integer.

extract_lane_u

Extracts the value contained within the specified lane of a v128 value interpretation as an unsigned integer.