Question

Please complete the following code, which is supposed to be a loop that scans a word array, adds the numbers that have been scanned, and exits when the summation, to be stored in $t0, is larger than the number in $s2, or until all numbers has been scanned. The starting address of the array is in $s0. The length of the array is in $s1. Only $t0, $t1, and $t2 can be modified in your code.

a).ori $t0, $0, 0
b).ori $t1, $0, 0
c).P2P5L0: sll $t2, $t1, 2
d).lw $t2, 0($t2)
e).bgt $t0,
f).addi $t1, $t1, 1
g).P2P5L1: nop

Answer 1

The code is a loop that scans a word array and adds up the numbers until a condition is met. It uses specific registers and instructions to achieve this.

Step-by-step explanation:

The given code is a loop that scans a word array and adds up the numbers that are scanned until either the sum exceeds a certain number or all numbers have been scanned. The starting address of the array is stored in register $s0, and the length of the array is in $s1.

1. Initialize $t0 to 0 to store the sum of numbers.
2. Initialize $t1 to 0 as the counter for the array index.
3. Use a loop to iterate through the array.
4. Load the value at the current array index into register $t2.
5. Compare the sum in $t0 with the predefined number in $s2 using the bgt instruction, which branches to the label f) if $t0 > $s2.
6. If the condition is not met, increase the array index by 1 using the addi instruction and go back to step 3.
7. Continue the loop until the condition is met or all numbers have been scanned.