Question

5. assume for a given processor the cpi (cycles per instruction) are as follows: arithmetic instructions is 1 load/store instructions is 10 branch instructions is 3 assume a program has the following instruction breakdowns: 500 million arithmetic instructions 300 million load/store instructions 100 million branch instructions.5.1 suppose that new, more powerful arithmetic instructions are added to the instruction set. on average, using these more powerful arithmetic instructions, the number of arithmetic instructions needed to execute a program is reduced by 25% with the impact that clock cycle time is now increased by 10%. is this a good design choice? why? (2 points)

Answer 1

Adding more powerful arithmetic instructions to a processor's instruction set can improve performance, but it depends on the overall impact on clock cycle time and efficiency.

Step-by-step explanation:

In this scenario, we are considering the impact of adding more powerful arithmetic instructions to a processor's instruction set. These more powerful instructions reduce the number of arithmetic instructions needed by 25% but increase the clock cycle time by 10%. To determine if this is a good design choice, we need to consider the overall performance and efficiency of the system.

Reducing the number of arithmetic instructions needed can improve the program's execution time, as each instruction will take less time to complete. However, the increase in clock cycle time due to the more powerful instructions may offset this improvement.

If the CPI for arithmetic instructions is reduced significantly while maintaining a reasonable clock cycle time, it can be considered a good design choice. However, if the overall performance doesn't show a significant improvement or if the clock cycle time is too high, the design choice may not be favorable.

Further analysis and benchmarking are required to determine the impact of these changes on the overall performance of the processor.