From: "Tony Harminc" <t...@harminc.com>
Sent: Saturday, October 28, 2017 11:13 AM
On 27 October 2017 at 19:31, Wendell Lovewell <wlovew...@mackinney.com>
wrote:
...
Sorry for all the background. What I'm looking for are "high-half"
versions of LA and BCTR commands, so that the incrementing and
decrementing could be done with 2 statements per CSECT--without affecting
the low halves of the register. For example in 31-bit land if R2 was
always available, I could say "LA R2,1(R2)" at the start of the modules,
and "BCTR R2,0" at the end. In this case reg 2 would always be the stack
level.
Add Immediate High (AIH). But when was it introduced...? There are no
change bars in the -10 edition of the PofO, so before then.
Wouldn't it be necessary to clear the high half first?
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