4.2 Statement Formats

Valid statement formats are shown in Table 4-3.

The label field is optional and, if present, should contain one identifier. A label can appear on a line of its own, or precede a mnemonic as shown in the second format.

The third format is only legal with certain assembler directives, such as MACRO, SET and EQU. The name field is mandatory and should contain one identifier.

If the assembly source file is first processed by the preprocessor, then it can also contain lines that form valid preprocessor directives. See 5.1 Preprocessor Directives for more information on the format for these directives.

There is no limitation on what column or part of the line in which any part of the statement should appear.

Table 4-3. Assembler Statement Formats
Format # Field1 Field2 Field3 Field4
Format 1 label:
Format 2 label: mnemonic operands ; comment
Format 3 name pseudo-op operands ; comment
Format 4 ; comment only
Format 5 empty line