How to add "new" JS bytecodes

[Mohan]

Hi All,

I want to add a new keyword in JavaScript to test some functionality.
I understand that this involves making changes in jsparse.cpp and
related files. I would also need to add a new bytecode for the new
keyword and corresponding changes need to be made in jsemit.cpp and
jsopcode.cpp.

Can somebody give additional pointers about what further changes
should I make to implement the new keyword?

Thanks,
mohan