構造体定義書

vax instruction operand

struct vop

No.	名称	属性	説明
1	vop		vax instruction operand
	vop_ndx	short int	-1, or index register. eg 7=[R7]
	vop_reg	short int	-1, or register number. eg @I^#=0xF
	vop_mode	short int	addressing mode 4 bits. eg I^#=0x9
	vop_short	char	operand displacement length as written
	vop_access	char	'b'branch ' 'no-instruction 'amrvw'norm
	vop_width	char	Operand width, one of "bdfghloqw"
	vop_warn	char *	warning message of this operand, if any
	vop_error	char *	say if operand is inappropriate
	vop_expr_begin	char *	Unparsed expression, 1st char ...
	vop_expr_end	char *	... last char.
	vop_nbytes	unsigned char	number of bytes in datum

vop