Function opnd_get_flags 

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

Assumes \p opnd is a register operand, base+disp memory reference, or an immediate integer. Returns the flags describing additional properties of the register, the index register or displacement component of the memory reference, or the immediate operand \p opnd.