Yes, but just because the C compiler doesn't emit them, that doesn't mean it can't understand them. If there are already tables for the assembler, specifying ac

Yes, but just because the C compiler doesn't emit them, that doesn't mean it can't understand them. If there are already tables for the assembler, specifying acceptable addressing modes and encodings, those can probably be reused - though that might require the designers to think of the toolchain as a cohesive whole. I don't think would automatically be a bad thing.