Panasonic PanaXSeries MN1030 Series, User Manual

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Chapter 9 Writing Machine Language Instructions and Directive Statements
Writing Directive Statements 179
9.4.19 assign
Syntax
label operation operand
name assign expression
Functional description
This directive defines the name to be the value of the expression coded in the operand. When that name
is coded in the operand of machine language instructions or directive instructions, the assembler will
refer the name’s value.
Operand coding rules
The expression coded in the operand must result in the attribute abs (absolute).
Refer to Chapter 8, “Writing Source Statements”, section 8.7, “Expressions”, section 8.7.4, “Expression
Attributes”, regarding attributes of expression.
Names defined with the assign directive can be defined again with the assign directive.
Names defined with the assign directive cannot be declared external references or external declarations.
No memory ares is reserved when an assign directive statement is executed.
Usage examples
The example below is a use of the assign directive.
NOTE: If a name defined with this directive is used, you must define the value before the
statement.
assign.lst Page 1
*** PanaX Series MN1030 Cross Assembler ***
Loc Object Line Source
1 _TEXT section CODE, PUBLIC, 1
2 NUM assign 0x01
00000000 8001 3 mov NUM, D0
4
5 NUM assign 0x02
00000002 8002 6 mov NUM, D0