Generate DynASM instruction listing with Intel XED about raptorjit

[lukego]

@astocko Please let me know if you have an easy way :-)

[astocko]

@lukego We're doing some refactoring in dynasm-rs and I haven't pushed the XED parser and opmap generator yet. I'll do that end of week and include a luajit dynasm map_op generator as well. I'll follow up asap.

[lukego]

@astocko Sounds awesome! There is no rush on my side, I only want to make sure you know that there is interest in your work when it is ready :).

I will need to work out how to use nix to manage a dependency on a Rust application but hopefully this is straightforward.

[astocko]

@lukego I ended up getting really bogged down with work the past two months, but I've come back to the project now and also rewrote the parser in python3 after some feedback. It doesn't support the full DSL, since the DSL mixes ISA definitions with XED specific C based code generators for encoding/decoding. I'll open source it in the next few days after some cleanup.

For dynasm-rs, we just dump the full ISA. What type of output do you want for dynasm? From a cursory look, it seems to be a bit more picky.

[lukego]

@astocko Good question. How does your ISA dump look?

Guessing it will make sense for the RaptorJIT DynASM to parse your ISA dump file directly, possibly after a preprocessing step e.g. if it's based on XML then I could translate it to something that's easier to parse without dependencies.

Guessing we can retire DynASM's own native instruction format, the strings like mov_2 = "OR:A3o|RO:A1O|mr:89Rm|rm:8BrM|rib:nB0ri|ridw:B8ri|mi:C70mi", since we are not writing the definitions by hand anymore and don't need a concise encoding.

Note: I have not looked closely at Intel XED at all so I am not exactly sure where XED ends and dynasm-rs starts. If you can show me how your ISA dump looks, and I can compare this with what you get from XED, then it will probably all become clearer for me :).

[lukego]

Guessing it will make sense for the RaptorJIT DynASM to parse your ISA dump file directly

On second thought, also very likely that it makes sense to use some external tool to translate the ISA dump into Lua source. That's what I did with the PMU counter definitions, which Intel provided as a TSV file and then my awk script translates into Lua source.