1a Problem (20 points, avg. 18.7)
Grow stack : Save $ra : Save $a0 : Restore $a0 between jals: Restore $ra after last jal: Shrink stack : Two jals jr and function label add(i) correct Overall order : : : : 2 points 2 points 2 points 2 points 2 points 2 points 2 x 1 point 1 point 2 points 3 points
1
Problem 1b (20 points, avg. 15.5)
Grow stack correctly Save $ra (or $s0) Restore $ra (or $s0) Shrink stack Flagging $s0 error No further errors : : : : : : 2 points 4 points 4 points 2 points (0 if didn't shrink in base case) 4 points 4 points (1 per additional error flagged)
2
Problem 2 (40 points, avg. 34.2)
Correct #cycles, CPI or #seconds for old processor points Correct #cycles for new processor correct OR CPI of new processor correct #instructions for new processor Correct factoring of 10% slower clock speed Correct calculations for new processor : : : : : : 10
20 points 10 points 10 points 5 points 5 points
3
Problem 3 (20 points, avg. 11.6)
(a) New floatingpoint: 0.2T / 1.25 0.8T New memory system: 0.35T / 2.5 1.2 applied correctly 0.65T : : 1 point 1 point
: : :
1 point 1 point 1 point
(b) Agree....