Monika,
There is an important distinction between AMODE(64) and doubleword binary
arithmetic in AMODE(31) routines. You may use AGR in an AMODE(31) routine if
you make other changes mutatis mutandis.
You will, for example, need a doubleword of storage for accumulating running
totals from SMF record to SMF record, etc., etc.; and you will thus need to use
the G versions of other familiar instructions too, but such changes will be
obvious to you when you think about them.
There is even an argument for using these G instructions when you don't need to
do so; they are somewhat faster that their four-byte analogues.
John Gilmore Ashland, MA 01721-1817 USA
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