I agree a lot, but RVVM implements an API to register new instructions at runtime, so I wanted to leave the core sources as much understandable and macro-free. Plus I don't see how other switch-based approaches in QEMU, or near-mentioned mini-rv32ima are better, so there is no really any ground I could compare upon. I guess about 1K lines for a hugely-performant, readable and extendable interpreter, which itself does calls into a tracing JIT is a fine trade-off to change it at this point)