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Types of macros In general, there are two types of macros: ExecutiveThese macros generate either code or data that is incorporated into the program being assembled.

Generally, an executable instruction is generated.DeclarativeThese macros produce information used by the assembly process while generating code.

z/TPF system programs use a large set of macro instructions to generate linkages or to simply generate inline code. Many of these macros are restricted to system programs because the macros are subject to change in future releases and represent an unprotected interface. A macro with an unprotected interface is called a system macro. Because some z/TPF system programs run in the application execution environment, some of the system macros also generate SVC linkages.

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