I have been following the ASMA034E discussion and am interested in learning how to do the new-fangled relative branching stuff. Can someone point me to a reasonably simple example? I learned my Assembler in the 80's and have been using that way of coding ever since. I think it is time to upgrade my so-called skills.
Regards - Grant DTCC Internal (Green) -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of Peter Relson Sent: 15 November 2018 12:45 To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: ASMA034E ATTENTION! This email originated outside of DTCC; exercise caution. A more modern (over 20 years old by now?) would suggest not having a USING for your "code" at all, but rather using relative branch with one register set up to point to your static data and a USING for that. It is relatively infrequent that your static data would exceed 4K, and even if it did you could often use long-displacement instructions to access any data that is more than 4K from the beginning. In some cases you might be able to take advantage of the "immediate" instructions and not even need access to static data. The IEABRCX macro can help in modules that want to use relative branch, particularly if they invoke system macros. Also be sure to identify the architecture level that macros are allowed to assume you are running with, via SYSSTATE ARCHLVL=. Some macro expansions might need local code register addressability, but that is usually easy to provide. Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN DTCC DISCLAIMER: This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error, please notify us immediately and delete the email and any attachments from your system. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
