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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 AppendixIRP
The IRP built-in macro is defined as follows:
IRP parm-name, <parm-list> macro-body ENDM
Where
| parm-name | is the parameter name that is used in the macro-body. Each time the macro is expanded, subsequent values from the parm-list are used to replace parm-name in the macro-body. |
| parm-list | is the list of parm-name replacement values. |
| macro-body | is the text that is expanded when the macro is invoked. |
For example:
IRP regnum, <R0,R1,R2,R3,R4>
PUSH A®num
ENDM
expands as:
PUSH AR0
PUSH AR1
PUSH AR2
PUSH AR3
PUSH AR4
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