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Jack, since I've been known to play with MI instructions some in RPG, I'll take a shot, too - Jon says it here, I think, W-code "...is then translated down to machine instructions..." - "machine instructions" is MI, the actual instructions, so far as I can surmise.

Cheers
Vern


On Mon, 7 Aug, 2023 at 3:02 PM, Jack Woehr via MIDRANGE-L <midrange-l@xxxxxxxxxxxxxxxxxx> wrote:


To: midrange systems technical discussion
Cc: jwoehr@xxxxxxxxxxxxxxxxxxxxxxxx
On Mon, Aug 7, 2023 at 1:45 PM Jon Paris <jon.paris@xxxxxxxxxxxxxx<mailto:jon.paris@xxxxxxxxxxxxxx>> wrote:

This would pre-suppose that RPG (or indeed any language on IBM i) compiles
down to C. They don't. All ILE compilers output a variant of IBM's w-code
intermediate code. That is then translated down to machine instructions.
In the case of OPM compilers, they produced MI as the intermediate language.


Jon, can you explain a bit about the difference between MI and W-Code (or
point to some such discussion)? Thanks.


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