----- Original Message ---- From: "McKown, John" <john.mck...@healthmarkets.com> To: IBM-MAIN@LISTSERV.UA.EDU Sent: Wed, November 28, 2012 4:06:00 PM Subject: Re: Usefullness (or not) of STOC/LOC instructions?
> -----Original Message----- > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] > On Behalf Of Kirk Talman > Sent: Wednesday, November 28, 2012 2:26 PM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: Re: Usefullness (or not) of STOC/LOC instructions? > > I guess, in my case, it is a combination of esthetics and being concerned > about >possible AR mode considerations. In AR mode: > L R2,0(,R1) > and > L R2,0(R1) > will likely result in greatly different values being loaded into R2 if the >contents of AR1 <> primary address space. > The latter can also run into issues in AMODE 64. The index register is always 32 bits, not 24, 31, or 64 depending upon AMODE. Waste the extra nano-second, use the comma. It is meaningful. Lloyd ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
