The reason for the original post comes via Don Higgins' z390 assembler, linker and emulator project -- see http://z390.info or https://github.com/z390development/z390. Some current work is adding new z16 instructions to the z390 assembler and emulator. We noticed the introduction of tiny BFP in the latest Principles of Operation so decided to add some support for it, thus wondering how HLASM handles it.
Not really a justification for making the format available in HLASM. Thanks for the replies from Seymour and Jonathan. Regards, John Ganci