IILF with an immediate value less than 65536 does what you want, and would be my choice.
Robert Ngan CeleritiFinTech -----Original Message----- From: IBM Mainframe Assembler List [mailto:ASSEMBLER-LIST@LISTSERV.UGA.EDU] On Behalf Of John P. Hartmann Sent: Wednesday, January 20, 2016 1:54 PM To: ASSEMBLER-LIST@LISTSERV.UGA.EDU Subject: Re: load logical halfword immediate sr x,x icm x,3, address On 01/20/2016 08:21 PM, Swarbrick, Frank wrote: > Is there any such instruction? This would be an instruction that would: > > - Be a register-and-immediate instruction, with a halfword immediate > value as the source. > > - Load the halfword in bytes 48-63. > > - Load zeroes in bytes 32-47. > > - Leave bytes 1-31 unchanged. > > I can't find anything that will do exactly this. > Why do I want to do exactly this? I "just do", and it bugs me I can't find a > single instruction to do it. > > I don't want LLILL because it sets bytes 1-47 to zero. > I don't want IILL because it does not set 32-47 to zeroes (yes, I could > follow the IILL with IILH Rx,0). > I don't want IILF because it uses a fullword immediate value instead of a > halfword immediate value. > I don't want LHI because it sign extends. > LA could almost be used, except it allows a value of "3/4s of a halfword". > LLH does exactly what I want, except that it's register-and-storage, not > register-and-immediate. > > In the end is it really a big deal? No; but I'm obsessing about it, thinking > I'm just overlooking it. Probably I'll use either LLILL or IILF, depending > on if I really care about bits 1-31 (which I don't really...). > > Thanks for putting up with this perhaps silly inquiry! > > Frank CSC - This is a PRIVATE message - If you are not the intended recipient, please delete without copying and kindly advise us by e-mail of the mistake in delivery. NOTE: Regardless of content, this e-mail shall not operate to bind the Company to any order or other contract unless pursuant to explicit written agreement or government initiative expressly permitting the use of e-mail for such purpose.
