WebAssembly SIMD bitwise instructions

WebAssembly SIMD bitwise instructions.

shl

Arithmetic left shift. Shifts the bits in each lane of a v128 value interpretation to the left by the same specified amount.

shr_s

Arithmetic right shift. Shifts the bits in each lane of a v128 value interpretation to the right by the same specified amount, outputting signed values.

shr_u

Logical right shift. Shifts the bits in each lane of a v128 value interpretation to the right by the same specified amount, outputting unsigned values.