The image shows a problem related to instruction execution in a basic processor architecture. Here's a breakdown:

Instructions Format:

The instructions are $10-$bits long.

The opcode is a single bit:

$1$ for ADD $($addition operation$).$

$0$ for NOP $($No operation$).$

The ADD instruction format consists of:

$1$ bit for the opcode.

$3$ bits for the source register $1($rs$).$

$3$ bits for the source register $2($rt$).$

$3$ bits for the destination register $($rd$).$

For ADD, the operation is: rd $$ rs $+$ rt $($i$.$e$.,$ the destination register gets the sum of two source registers$).$

The NOP instruction consists of all don$$t$-$care values $($indicated by $\text{'}$x$\text{'})$ after the opcode.

Task:

Instructions are coming into the Instruction Fetch$/$Instruction Decode $($IF$/$ID$)$ register on every clock cycle, but instruction fetching is not your responsibility.

The task is to complete the datapath and control for the ADD and NOP instructions.

You need to mark the size of all the stage registers.

Control bits can be carried with the data in stage registers.

The final carry bit $($C$4)$ is ignored, and only the $4-$bit result is stored.

Required Work:

You must complete the datapath for these operations, ensuring that the control signals, register sizes, and data flow are clearly marked. Additionally, the NOP instruction should have minimal impact on the pipeline.