× The internal search function is temporarily non-functional. The current search engine is no longer viable and we are researching alternatives.
As a stop gap measure, we are using Google's custom search engine service.
If you know of an easy to use, open source, search engine ... please contact support@midrange.com.

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.


As an Amazon Associate we earn from qualifying purchases.

This thread ...


Follow On AppleNews
Return to Archive home page | Return to MIDRANGE.COM home page

This mailing list archive is Copyright 1997-2021 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact [javascript protected email address].

Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.