Panasonic MN1030 user manual Macro Control Statements, Adrset Data1, reg1 Data2, reg2

Chapter 7 Type of Source Statements

7.5Macro Control Statements

Macro control statements reduce coding effort by replacing strings coded in source statements with other strings. This enables low-level assembly language for a program block to be abstracted as a macro name.

Macros are coded in two formats: macro definitions and macro calls.

A macro definition defines a macro name and macro body. The macro body uses multiple machine lan- guage instructions to construct a single program process.

A macro call is just a macro name coded as a source statement. The assembler will replace it with all the machine language instructions coded in the macro body. This process is called macro expansion. The basic difference between a macro call and a subroutine call is that a macro call actually outputs ma- chine language instructions as source statements, with arguments used to output different machine lan- guage instructions for each call.

The example below shows macro control statements.

*macro definition	-------------------------------
adr_set	macro data, reg
	mov	reg, A0
	mov	data, D0
	mov	D0, (A0)
	endm
	.
	.
*macro call-------------------------------------	.
	adr_set	data1, reg1
	.
	.
	.
	adr_set	data2, reg2
	.

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