On Sat, 9 Nov 2019 at 15:07, Seymour J Metz <sme...@gmu.edu> wrote: > > I would assume that any system macro destroys R15-R1 unless the documentation > says otherwise. In the case of WTO, the documentation decribes the use of all > three registers. For that matter, the documentation mentions the use of > AR14-AR1.
Yes it's documented and legit, but it's a change in behaviour over the last few z/OS releases. In IIRC z/OS 1.x, WTO did not clobber AR15, and STORAGE OBTAIN did not change the high half of R1. Tony H. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
