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Ax51 User's Guide
Ax51 Introduction Assembling Programs Writing Assembly Programs Control Statements 
Macro Processor Standard Macro Processor 
Standard Macro Controls Defining Standard Macros Calling Standard Macros Local Symbols Exiting a Macro Built-in Macros REPT IRP IRPC Standard Macro Operators NUL Operator & Operator < and > Operators % Operator ;; Operator ! Operator MPL Macro Processor MPL Macro Overview MPL Meta Character Defining MPL Macros Calling MPL Macros Local Symbols Expressions Common Functions Bracket Function Comment Function Escape Function METACHAR Function SET Function EVAL Function Comparison Functions Conditional Functions EXIT Function IF Function REPEAT Function WHILE Function Console I/O Functions String Functions LEN Function MATCH Function SUBSTR Function Advanced Literal Delimiters Blank Delimiters Identifier Delimiters Literal and Normal Modes C Preprocessor Exceptions Side-Effects Predefined Macros Examples Error Messages Appendix& Operator
The ampersand operator ('&') may be used to concatenate text and macro parameters as shown in the following example:
MAK_NOP_LABEL MACRO X
LABEL&X: NOP
ENDM
This macro inserts a new label and a NOP instruction for each invocation. The parameter passed to the macro is appended to the text LABEL to create the label for each line. For example:
LOC OBJ LINE SOURCE
1 MAK_NOP_LABEL MACRO X
2 LABEL&X: NOP
3 ENDM
4
5
6 MAK_NOP_LABEL 1
0000 00 7+1 LABEL1: NOP
8 MAK_NOP_LABEL 2
0001 00 9+1 LABEL2: NOP
10 MAK_NOP_LABEL 3
0002 00 11+1 LABEL3: NOP
12 MAK_NOP_LABEL 4
0003 00 13+1 LABEL4: NOP
14
15 END
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