Question

How to iterate through an array in LC3?

A. Using the INCREMENT command
B. Utilizing the BRANCH command
C. Employing the LEA instruction
D. Utilizing the LDI command

Answer 1

To iterate through an array in LC3, you can employ the LEA instruction. Here's a step-by-step explanation: 1. Load the base address of the array using the LEA instruction. 2. Initialize a counter register. 3. Use a loop to iterate through the array, loading values, performing operations, and incrementing the base address and decrementing the counter register.

Step-by-step explanation:

To iterate through an array in LC3, you can employ the LEA instruction. Here's a step-by-step explanation:

1. Load the base address of the array into a register using the LEA instruction. For example, LEA R1, array
2. Initialize a counter register, such as R2, with the length of the array
3. Use a loop to iterate through the array:
   1. Load the value at the current index of the array into a register using the LDR instruction
   2. Perform any necessary computations or operations with the value
   3. Increment the base address register to move to the next index of the array using the ADD instruction, e.g., ADD R1, R1, #1
   4. Decrement the counter register by 1 using the SUB instruction, e.g., SUB R2, R2, #1
   5. Check if the counter register is zero. If not, branch back to the beginning of the loop using the BRnzp instruction