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MVO (Move offset)

 
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sandeep_das777

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Joined: 19 Aug 2010
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Location: Bangalore

PostPosted: Fri Aug 27, 2010 6:41 pm    Post subject: MVO (Move offset)
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Can anyone tell me what the MVO instruction does, especially

MVO ABC,ABC
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Robert Sample

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PostPosted: Fri Aug 27, 2010 7:16 pm    Post subject:
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Read it yourself in the manual -- if you still have questions after reading the write up and the example in Appendix A, please post them. Principles of Operation
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Bill O'Boyle

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PostPosted: Fri Aug 27, 2010 8:30 pm    Post subject: Reply to: MVO (Move offset)
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Before SRP was added to 370 architecture, MVO was used primarily (but not exclusively) for shifting packed-decimal data digits, either right or left.

In your example, ABC is shifting itself 4-Bits left, so high-order truncation of the high-order 4-Bits will occur.

As Robert has suggested, a review of the POPS Manual is in order -

http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/DZ9ZR003/CCONTENTS?SHELF=DZ9ZBK03&DN=SA22-7832-03&DT=20040504121320

Bill
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