s390 Syntax - Using as
Description: Using as

Next: s390 Directives, Previous: s390 Characters, Up: S/390-Dependent

#### 9.32.3 Instruction syntax

The assembler syntax closely follows the syntax outlined in Enterprise Systems Architecture/390 Principles of Operation (SA22-7201) and the z/Architecture Principles of Operation (SA22-7832).

Each instruction has two major parts, the instruction mnemonic and the instruction operands. The instruction format varies.