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Richard Thomas wrote:

My question is: Given that QPRCRTPG is responsible for converting "the
symbolic representation of a machine interface (MI) program into an OPM
program object." - (i.e. from the IRP) - then surely its IRP syntax-checker
should flag /MXD as an invalid indicator/branch form for the ADDN op-code?

But "MXD" is the same as "POS" and "HI."

They're just synonyms for the same configuration of the condition flags, provided purely for the sake of source code readability: surely you'd have trouble, without profuse comments, understanding that a ZC condition meant "greater than" on a comparison, "positive" on a numeric operation, and "mixed" on a TSTBUM. The synonyms allow us to use result mnemonics that match what we're conceptually testing for, rather than just matching the actual flags.

--
JHHL

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