struct operlist *ol = xmalloc(sizeof(struct operlist));
struct operand *mask_oper = xmalloc(sizeof(struct operand));
struct operand *shift_oper = xmalloc(sizeof(struct operand));
struct operlist *ol = xmalloc(sizeof(struct operlist));
struct operand *mask_oper = xmalloc(sizeof(struct operand));
struct operand *shift_oper = xmalloc(sizeof(struct operand));