IBM High Level Assembler (HLASM) and Toolkit Feature is a flexible development solution for all Assembler Language applications. The assembler and optional toolkit improves programmer productivity and simplifies program development and maintenance.
HLASM provides all the proven facilities found in earlier assemblers and includes many new facilities. It helps you develop programs and subroutines for functions not typically provided by other symbolic languages, such as COBOL, FORTRAN, and PL/I. High Level Assembler provides extensions to the basic assembler language, and the macro and conditional assembly language, including external function calls and built-in functions. The optional High Level Assembler Toolkit Feature is a powerful and flexible set of tools that enhances application recovery and development.
Enhanced usability with warning-suppression option.
Simplified tool integration with improved SYSADATA record layouts.
Cross-system compatibility assisted by ASCII constants.
Simplified macro coding with longer macro arguments and string variables.
QY-type and SY-type address constants provide resolution into long-displacement. Support for three decimal floating-point data types, increasing instruction addressability and reducing the need for additional instructions.
OPTABLE option – The OPTABLE option is permitted on the *PROCESS statement.
Suffix tags for instruction mnemonics let you use identically-named macro instructions and machine instructions in the same source program.
HLASM provides assembler listing and diagnostic features to help program development and analysis of program errors. A comprehensive assembler listing provides details about a program and its assembly. Assembler options help control the format of the listing and which sections to produce.
The macro language is an extension of the assembler language. It provides a convenient way to generate a preferred sequence of assembler language statements many times in one or more programs. HLASM supports macro definition and macro instruction.
Flexible extensions for external function calls, built-in functions, extensions to existing instructions and SET symbol usage, system variable symbols, and data attributes.
System requirements
High Level Assembler runs under these operating systems. Unless otherwise stated, the assembler also operates under subsequent versions, releases, and modification levels of these systems:
- OS/390® Version 2 Release 10.0
- VM/ESA Version 3 Release 1.0
- z/VM® Version 5 Release 2
- VSE/ESA Version 2 Release 6
- z/VSE® Version 3 Release 1 andVersion 4
- z/OS® Version 1 Release 2.0
Machine requirements
For assembling and running High Level Assembler programs, tape device and double-byte data requirements, see the machine requirements.
Storage requirements
For virtual storage, auxiliary storage space, library space and installation, see the storage requirements.
Interactive Debug Facility (IDF) is a symbolic debugging tool for most high-level languages.
A guide to installation and customization of High Level Assembler and Toolkit Feature.
Learn how to use structured programming macros, disassembler, program understanding tool, cross-reference facility and enhanced SuperC components of the Toolkit feature.
COBOL compilers that help you leverage your existing applications on z/OS and AIX platforms.
Advanced, high performance compilers that can be used for developing complex Fortran programs.
Advanced compilers for integrating PL/I applications with modern web technologies.
Simplify workload management and tailor user access to applications.
Enhanced online and batch capabilities for partitioned data sets.
A clock simulator for testing mainframe applications that simulates date and time without changing application code or requiring a separate computing environment.
Protects Easytrieve investments by using Easytrieve source code from the original library. Generate IBM COBOL reports and update or create Easytrieve applications.
Delivers the core set of tools to help you accelerate the delivery of z/OS applications.