16.3.1. Objectives of the Unit

Try these first

1. 1.

   Define control transfer instructions.

   Hint

   Think of instructions that could redirect program execution.

2. 2.

   What role does the program counter (PC) play?

   Hint

   Consider what guides the CPU’s next action.

3. 3.

   What are control transfer instructions?

   • Instructions that perform calculations
   • Instructions that change execution flow
   • Instructions that store data

   Hint

   Think about what allows you to skip some actions or repeat them.

4. 4.

   True or False: The program counter (PC) is responsible for holding the return address during function calls.

   • True
   • False

   Hint

   What keeps track of where to return after a jump?

5. 5.

   Design a simple instruction set that includes at least one conditional jump and one function call. Explain how the program counter is modified in each case.

   Hint

   Make sure to consider how the PC behaves differently in each scenario.

6. 6.

   Describe a potential failure of not managing temporary registers correctly during control transfers and its implications on program flow.

   Hint

   Think about what happens if you lose your bookmark.