Admittedly IEFBR14 will work fine in AMOD64 if the high 32 bits of R14 and R15 are zero. However, if you have to deal with legacy 24-bit code, then you have to deal with the incompatibility between AMODE24 and AMODE64.
-- Shmuel (Seymour J.) Metz http://mason.gmu.edu/~smetz3 ________________________________________ From: IBM Mainframe Discussion List <IBM-MAIN@listserv.ua.edu> on behalf of Paul Edwards <mutazi...@gmail.com> Sent: Wednesday, May 9, 2018 7:10 PM To: IBM-MAIN@listserv.ua.edu Subject: Re: GETMAIN LOC=32 On Wed, 9 May 2018 20:04:57 +0000, Seymour J Metz <sme...@gmu.edu> wrote: >>What do you suggest calling a module that has been built on MVS 3.8j, >>using 32-bit registers for both data and addresses, and works fine as >>AM24, and then has been taken to z/OS and the "PDS" utility has been >>used to mark it as AM64, and the program runs fine, regardless of what >>AMODE it has been set to? > >"implausible"; various instructions work differently in AM24 and AM31, much >less AM64. It's not implausible, it's what I do. I produce 32-bit load modules that work on all 3 AMODEs. They passively accept whatever AMODE they were called with. They don't even require different code paths internally. BFN. Paul. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
