IBM High Level Assembler
High Level Assembler or HLASM is IBM's current assembler product for its z/OS, z/VSE, z/VM and z/TPF operating systems on z/Architecture mainframe computers. There is also a version that runs on Linux, primarily intended for systems running on a z/Architecture system (this environment is sometimes referred to as z/Linux).
Despite the name, HLASM on its own does not have many of the features normally associated with a high-level assembler, but does offer a number of improvements over Assembler H and Assembler(XF), such as labeled and dependent USINGs, more complete cross-reference information, and additional macro language capabilities such as the ability to write user-defined functions.
The High Level Assembler Toolkit is a separately priced accompaniment to the High Level Assembler. The toolkit contains:
- A set of structured programming macros —
- A disassembler.
- A "Program Understanding Tool" (re-engineering aid).
- A Source XREF utility (cross-reference facility).
- Interactive Debug Facility.
- Enhanced SuperC (source comparison tool).
- IBM Corporation. "IBM High Level Assembler and Toolkit Feature - Release History". Retrieved October 21, 2012.
- IBM Corporation. "Announcement Letter 292-244: IBM HIGH LEVEL ASSEMBLER/MVS & VM & VSE". Retrieved October 21, 2012.
- IBM Corporation. "Toolkit Feature components". Retrieved October 21, 2012.
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