code: def MVNS(self, params):
          
          Ra, Rb = self.get_two_parameters(self.TWO_PARAMETER_COMMA_SEPARATED, params)
  
          self.check_arguments(low_registers=(Ra, Rb))
  
          def MVNS_func():
              self.register[Ra] = ~self.register[Rb]
              self.set_NZ_flags(self.register[Ra])
  
          return MVNS_func
docs: MVNS Ra, Rb
  
          Negate the value in Rb and store it in Ra
          Ra and Rb must be a low register