The entries allowed in the operation field of a model statement,
before generation, are given in the following list:
- An ordinary symbol that represents the operation code for:
- Any machine instruction
- A macro instruction
- MNOTE instruction
- A variable symbol
- A combination of variable strings concatenated together
- All assembler instructions, except ICTL and conditional assembly
instructions
The following rules apply to the operation field of a model statement:
- Operation code ICTL is not allowed inside a macro definition.
- The MACRO and MEND statements are not allowed in model statements;
they are used only for delimiting macro definitions.
- If the REPRO operation code is specified in a model statement,
no substitution is done for the variable symbols in the record following
the REPRO statement.
- Variable symbols can be used alone or as part of a concatenated
string to generate operation codes for:
- Any machine instruction
- Any assembler instruction, except COPY, ICTL, ISEQ, REPRO, and
MEXIT
The generated operation code must
not be an operation code for these instructions, either directly,
or from copies created by use of OPSYN:
- A conditional assembly instruction, such as LCLx, GBLx, SETx,
AIF, and AGO
- The following assembler instructions: COPY, ICTL, ISEQ, MACRO,
MEND, MEXIT, and REPRO
- Double-byte data is not valid in the operation field.
HLASM Language Reference
Copyright IBM Corporation 1990, 2014