Interpreter: DSI rollbacks + stswx and lswx

[Anusko]

I've implemented the needed DSI rollbacks and also two missing load/store operations. The patch can be found at http://pastebin.com/8LZdz6km

Found some old posts saying that PES 2008 (Wii) doesn't work due to the lack of stswx, but I don't have the game, so if someone can test it and give me some feedback, I'll appreciate it.
I'm also not sure if I'm getting "n" the right way. Is "u32 n = rSPR(SPR_XER) & 0xFE000000;" ok?

I really need feedback because I can't confirm if any of this is working, since I was unable to get a game that generates a DSI exception or an error due to a missing instruction :-(

Don't forget to use the interpreter (slooowwww )!

[Jack Frost]

I'm not sure if thats really correct...
That aside, in the places where you use memcpy to restore the state, why not use memcpy to save it?

And you dont have to go full interpreter. Just load Dolphin in debug mode (dolphin.exe -d) and select JIT LoadStore off in the menu.

[Anusko]

I tried to copy only what's essential and not the whole at the beginning, that's why I don't use memcpy to save the state. I also tried to reduce the number of function calls needed to do this.

You say that you are not sure, can you elaborate please? I'm following IBM's resources about the POWER/PPC architecture.

Thanks by the debug tip! :-)

[Anusko]

I solved a bug and cleaned some code. The new patch is at the same spot