Function opnd_shrink_to_16_bits 

pub unsafe extern "C" fn opnd_shrink_to_16_bits(
    opnd: opnd_t,
) -> opnd_t

Shrinks all 32-bit registers in \p opnd to their 16-bit versions. Also shrinks the size of immediate integers and memory references from OPSZ_4 to OPSZ_2.