Question

(a) If we assume forwarding, how many stalls in total are needed to ensure the code is executed correctly. Explain.

(b) Use code scheduling to rearrange the code above to eliminate the needed stalls. Explain.

Answer 1

Forwarding and code scheduling can help minimize stalls in the execution of code.

Step-by-step explanation:

In computer architecture, forwarding is a technique used to reduce stalls (or delays) in the execution of instructions. When data is needed by an instruction, instead of waiting for it to be stored in a register, the processor forwards the data directly from the source to the destination. In this case, if we assume forwarding, no stalls are needed to ensure the code is executed correctly as the data is forwarded without delay.

Using code scheduling, we can rearrange the code to eliminate the needed stalls. By reordering the instructions, we can ensure that the data dependencies are resolved in a way that minimizes delays. For example, if an instruction is dependent on the result of another instruction, we can schedule it after that instruction to avoid any stalls.