> -----Original Message----- > From: IBM Mainframe Discussion List > [mailto:[EMAIL PROTECTED] On Behalf Of Jack Kelly > Sent: Friday, December 28, 2007 10:10 AM > To: [email protected] > Subject: Re: Shifting nibbles to the end of a register > > > Seems like you're trying to move a byte to the high order. Instead of > shifting why not just ICM? > > Jack Kelly
The problem with ICM is that it doesn't clear the rest of the register bytes to x'00'. However, on the newer processors, there is the "Load Logical Character" instructions which load a byte into bit positions 56-63 of the register and clears the rest of the register, 0-55 or 32-55, with x'00's depending on whether the "Grande" form is used or not. Manys the times that I've done an SLR followed by an ICM with a mask of B'0001'. -- John McKown Senior Systems Programmer HealthMarkets Keeping the Promise of Affordable Coverage Administrative Services Group Information Technology The information contained in this e-mail message may be privileged and/or confidential. It is for intended addressee(s) only. If you are not the intended recipient, you are hereby notified that any disclosure, reproduction, distribution or other use of this communication is strictly prohibited and could, in certain circumstances, be a criminal offense. If you have received this e-mail in error, please notify the sender by reply and delete this message without copying or disclosing it. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
