Panasonic MN1030 user manual Text

Chapter 4 Optimization

Example: branch destination of conditional branch instruction out of range

This example shows a branch outside the permitted range (-128 to +127 of PC) of a BCC LABEL con- ditional branch instruction.

The source list is as follows.

	opt	on
_TEXT	section	CODE, PUBLIC,1
sub_func	mov	0, D2
	cmp	D1, D2
addr_set	bcc	func_end
func_end	org	addr_set+128
	rts
	end

The final list file after assembly is shown next. LABEL exceeds the permitted branch range of BCC LA- BEL, so the code has been converted to BCS *+5, JMP LABEL. Note that the mnemonics and object code are different.

			opt2.lst Page 1
Loc	*** PanaX series Series MN1030 Cross Assembler ***
	Object	Line	Source	opt	on
		1	_TEXT
40000000		2			section CODE, PUBLIC, 1
	8A00	3	sub_func	mov	0, D2
40000000		4
40000002	A6	5	addr_set	cmp	D1, D2
40000003	C405CC0080	@6		bcc	func_end
		7		org	addr_set+128
40000083		8	func_end
	F0FC	9		rts
40000083		10
		11		end
		12	opt2.lst Page 2

*** Symbol Table	***
40000000	T	sub_func
40000003	T	addr_set
40000083	T	func_end

56 Usage Example