Nonsense! Look at the code again. There are a lot of repeated motifs, like the things that fetch from memory and increment the program counter. It cries out to

Nonsense! Look at the code again. There are a lot of repeated motifs, like the things that fetch from memory and increment the program counter. It cries out to be partially automated. If nothing else, there has got to be a more human-readable equivalent to all that bit-masking and offset-adding. Code generation doesn't need to be heavyweight.