[Libre-soc-bugs] [Bug 915] add overflow to av maxu and maxs operations

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=915

--- Comment #2 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
combined cmp with max:

* the lt flag is set if RA<RB
* the gt flag if RA>RB

etc.

but XER.SO being set can detect if the entire batch is set.
the dependencies however are hell.  it would be better to have
a CRfield vector "reduction" operation, afterwards.

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