This function receives one parameter, a $32-$bit unsigned integer. It returns a value of one $($true$)$ if an invalid pattern is detected, and zero $($false$)$ if not. In the ARM modified immediate context, some otherwise legal values comprising an $8-$bit sequence cannot be created by rotating an $8-$bit constant by an even number of bits. Thus, $255$ is an acceptable value $($binary $0000000011111111),1020$ is an acceptable value $($binary $0000001111111100),$ but $510$ is not an acceptable value $($binary $0000000111111110).$