FYI: In Appendix B of z/Architecture Principles of Operation, in the rightmost characteristics column of the lists of instructions is an indication of whether or not a particular instruction explicitly or implicitly references any access registers. As you might expect, this column is blank for LARL.
Keven -----Original Message----- From: IBM Mainframe Assembler List [mailto:[email protected]] On Behalf Of John McKown Sent: Monday, December 15, 2014 14:33 To: [email protected] Subject: LARL question - sets AR? This likely sounds really stupid, but when I am in AR mode, and I do an LARL, does that instruction set the corresponding AR register as well as the specified GPR? I looked at the LARL instruction in the -9 PoPS manual. It doesn't say, but refers to other instruction such as Branch And Save Relative Long. But none of those mention the associated AR either. -- While a transcendent vocabulary is laudable, one must be eternally careful so that the calculated objective of communication does not become ensconced in obscurity. In other words, eschew obfuscation. Maranatha! <>< John McKown
