Write the process necessary to create a 64-bit arithmetic shift register. In addition to the normal synchronous inputs, your register should also provide the following synchronous shift signals: 'load', 'shift Left', and 'shiftRight'. Remember, an arithmetic shift register will perform sign-extension on shifting right to preserve negative values. Give the load signal the highest priority of the control signals. Your device should also provide the standard 'clock'/'reset' inputs along with the full 32-bit register contents as the output.