JavaScript PowerPC emulator

Remember Fabrice Bellard's jslinux 80486 emulator? Inspired by his idea, I'm trying to write a PowerPC emulator in JavaScript. The instruction set is a lot easier of course than the x86 variable-length CISC, which I barely understood but couldn't implement. I've so far implemented 39 operations, which covers most of the fixed-point storage-type functions. If anyone would like to take a look at it, or give me some advice to improve it, here it is: http://azabani.com/cgit.cgi/jsppc/tree/jsppc.js

>>7
Flags? What kind of flags? I know that PowerPC sometimes stores additional information outside the GPRs and FPRs, such as in the 64-bit fixed-point exception register. I'm creating the data structures that I need for the operations as I go.