10 Macro Assembler Directives

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Macro Assembler directives and specification of instructions are specified in a similar way. Directives control options of the Macro Assembler or format and generate data for the code segments. Certain directives establish or alter the definitions of symbols.

The Macro Assembler directives are symbols with a type of directive and a predefined value specifying the particular directive. Both directives and instructions appear between labels and operands. The Macro Assembler assigns a specific type to such predefined symbols and searches only for this type between labels and operands. Therefore, labels can have the same names as instructions and directives.


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