weired goto with label address array

[BaoshanPang]

Just curios, why we code like this? what's the benefit using "goto" with label addresses array than using the plain "switch"?

https://github.com/chipsalliance/VeeR-ISS/blob/a6fabee95de4aa0f3e9b1ff97d02d1d7af62d3bd/decode.cpp#L1922