Structured type definition

The Macro Assembler is extended with the following new keywords in order to support ANSI-C type definitions.

• STRUCT
• UNION

The structured type definition for STRUCT can be encoded as in the following listing:

typeName: STRUCT
   lab1: DS.W  1   lab2: DS.W  1         ...

   ENDSTRUCT

where:

• typeName is the name associated with the defined type. The type name is considered to be a user-defined keyword. The Macro Assembler will be case-insensitive on typeName.
• STRUCT specifies that the type is a structured type.
• lab1 and lab2 are the fields defined inside of the typeNametype. The fields will be considered as user-defined labels, and the Macro Assembler will be case-sensitive on label names.
• As with all other directives in the Assembler, the STRUCT and UNION directives are case-insensitive.
• The STRUCT and UNION directives cannot start on column 1 and must be preceded by a label.