2.3. Structure of assembly language modules

Assembly language is the language that the ARM assembler (armasm) parses and assembles to produce object code. By default, the assembler expects source code to be written in ARM assembly language.

armasm accepts source code written in older versions of ARM assembly language. It does not have to be informed in this case.

armasm can also accept source code written in pre-UAL Thumb assembly language. In this case, you must inform armasm using the --16 command-line option, or the CODE16 directive in the source code. The pre-UAL Thumb assembly language does not support Thumb-2 instructions.

This section describes:

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