Is the a way to simulate 8 bit and 16-bit processors in Matlab?

I'm implementing a new lightweight cipher in Matlab. I will require the simulation of 8-bit and 16-bit processors to test the performance of the cipher. So it is possible to simulate 8-bit and 16-bit processor in Matlab?

[James Tursa]

We need more detail. Are you asking about simulating 8-bit and 16-bit integer arithmetic, or are you asking about simulating the entire opcode set of a processor?

[Yousuf Al-Aali]

Start with 8-bit and 16-bit integer arithmetic and later simulate running the functions on 8-bit processor and 16-bit processor with simulated registers to monitor the resource usage i.e. processor load, memory requirement.