Lab 1

1. (40 points): Write a SPIM program to calculate 2 * (10 + 20) – 15. (use add – do not use mul, for
   example: 2*x = x + x) Use R8, R9, and R10 to store the values 10, 20, 15. Store the result in R11.
   (1) Screenshot of your program:
   [Load your program into QtSPIM and run your program. Take a screenshot showing program code
   and register values.]
2. (60 points): Write a SPIM program to prompt the user to enter two integer numbers x and y, and to
   display their sum z, z = x + y. All x, y and z can be stored in the registers. (do not need to define
   variables x, y and z in data segment)
   Register Mapping: x  $t0, y  $t1, z  $t2
   Here is a sample run:
   Enter the first integer: 6
   Enter the second integer: 10
   The sum is 16
   (1) Screenshot of your program:
   [Load your program into QtSPIM and run your program. Take a screenshot showing program code
   and register values.]
   (2) Test cases (screenshot of result, showing input/output):