From what I've heard, x86 to PPC or ARM emulators are doing dynamic recompiling and instrumentation. It catches the illegal memory accesses and rebuilds the cod

From what I've heard, x86 to PPC or ARM emulators are doing dynamic recompiling and instrumentation. It catches the illegal memory accesses and rebuilds the code responsible to add paths with slower code with alignment compensation. A lot of x86 code is aligned for speed already so it's a pretty safe bet to assume alignment and fix it up if wrong.