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Extending bit patterns

We already extended bit patterns in ALU project. Our instruction with Opcode 00 was extending the 4-bit field denoted by XY with zeros to 8 bits. This was preserving the unsigned value, e.g for XY denoting 0101 we have \(u(0101) = u(00000101)\).

In other applications (e.g. an ALU that provides more opcode) we would like to provide an instruction that extends a bit pattern such that its signed value gets preserved. And this is what the video is all about.

Video tutorial

Assignment

Let me know if you have a good idea for an assignment. Seriously!