Download MCUez ASSEMBLER USER`S MANUAL

Freescale Semiconductor, Inc.
ASSEMBLER DIRECTIVES
8.24 MEXIT - TERMINATE MACRO EXPANSION
Syntax:
MEXIT
Description:
MEXIT is usually used together with conditional assembly within a macro. In that case, the
macro expansion might terminate prior to termination of the macro definition. The MEXIT
directive causes macro expansion to skip any remaining source lines ahead of the ENDM
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directive.
Example:
Following portion of code:
save:
codSec:
entry:
XDEF entry
MACRO
LDHX #storage
LDA \1
STA 0,x
LDA \2
STA 2,x
IFC '\3', ''
MEXIT
ENDC
LDA \3
STA 4,X
ENDM
SECTION
; Start macro definition
; save first argument
; save second argument
; is there a 3rd argument?
; no, exit from macro.
; save third argument
; End of macro definition
save char1, char2
Generates following listing file:
16
17
18
19
16
2m
3m
4m
000000 45 xx00
000003 C6 xxxx
000006 E700
+
+
+
20
21
5m
6m
000008 C6 xxxx
00000B E702
+
+
argument
22
7m
MCUEZASM08/D
0000 0001
+
save char1, char2
LDHX #storage
LDA char1
STA 0,x
; save first argument
LDA char2
STA 2,x
; sa v e s ec o nd
IFC
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'', ''
8-31