Chapter 11 Writing Macro Control Statements
208 Macro Definitions (macro, endm)
Coding rules
The following instructions cannot be used within macro definitions.
• include directive
• macro directive — within a macro definition another different macro cannot be defined
• purge directive — within a macro definition macros cannot be purged
The symbols used in the label fields within a macro definition must be declared with the local directive
or passed from the outside using dummy parameters. Refer to section 11.5, "Local Symbol Declaration
(local)", for details.
A macro can be redefined. The new definition will be effective from the following line on.
The purge directive can purge a macro definition. The macro will be recognized as an instruction or
symbol from the following line on.
The macro name cannot be the same as a machine language mnemonic.
The assembler does not perform syntax checks when a macro is defined. If there are errors or warnings,
they will be output when the macro is expanded.
Usage example
An example macro definition is shown below.
xchg macro
mov D2, D0
mov D1, D2
mov D0, D1
endm