I don't think in order is related to the ISA. There may be a guarantee of the order of operations when it comes to the view of memory the programmer sees, but t

I don't think in order is related to the ISA. There may be a guarantee of the order of operations when it comes to the view of memory the programmer sees, but that does not prevent the hardware from executing out of order, as long as the end result is the same. X86 has strict memory ordering also, but both intel and AMD use out of order at the hardware level