A mask of 7 loads the low order 3 bytes, so that r1 would contain whatever the high order byte it contained originally plus 000008 in the low order 3 bytes. L R2,PARMJOBC ICM R1,7,0(R2)
If smf30cps contains 00000001, then the first 4 bytes of wk1 would contain 00000001 after the move And r1 would also contain 00000001 after the add, assuming WK1 is on a full word boundary. MVC WK1(4),SMF30CPS A R1,WK1-----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Crabtree, Anne D Sent: Thursday, August 04, 2011 9:02 AM To: IBM-MAIN@bama.ua.edu Subject: assembler help! In our IEFACTRT (accounting exit), an assembler program, it has the following commands: L R2,PARMJOBC ICM R1,7,0(R2) If PARMJOBC contains a binary integer length of 4 with 00 00 00 08, what ends up in all bits of R1? I am trying to add additional values to what is in R1 by doing: MVC WK1(4),SMF30CPS A R1,WK1 This is not doing what I want it to do! If SMF30CPS, also a binary integer length of 4, has 00 00 00 01, what ends up in R1? Anne D. Crabtree System Programmer WV Office of Technology Data Center 1900 Kanawha Blvd East Charleston, WV 25305 (304)558-5914 ext 58292 (304)558-1441 fax ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
