[bri3d]

It’s a weird in between, IMO. I don’t think it’s fair to say it’s not emulation, because in most places the original architecture’s state is maintained and functions are hooked through macros like PPC_FUNC - the original source code is not fully ported to the host platform, but relies on a set of compile and runtime tricks which, well, emulate the properties of the guest. But yes, it’s not traditional emulation and things are gradually ported to be more “native” over time.

[zapzupnz]

Sounds a bit like WINE

[bri3d]

No. Way lower level. WINE runs native code and replaces library and system calls. This turns native code into C++ macros and then recompiles those into code. This is like a JIT with C++ as the IR. On the other hand WINE is not an emulator ;)