CS 2734 Computer Organization II

• Prior to the laboratory, you should do the following:

  • Make a separate directory for laboratory 4 and put all of the code that you develop for this lab in that directory.

  • Implement the following functions in MIPS:
    • void read_array(char *msg, int *inArray, int n);

      This function outputs the string in msg if msg is not 0. It then reads n integers into the array inArray.

    • void write_array(char *msg, int *outArray, int n);

      This function outputs the string in msg if msg is not 0. It then outputs n integers from the array outArray.

    • void accumulate_array(int *origArray, int *accumArray, int n);

      This function computes the first n elements of the array accumArray as the accumulation of the elemenets in origArray

  • Rewrite the program from Laboratory 3 to use these functions.

  • Be sure to thoroughly document your programs following the style of the programs discussed in class. (Insufficient documentation will bump an otherwise working program down to 8.)

• Implementation Notes:
  • Write a C version of this program first to make sure you understand it.
  • An example is:
    N = 8, A = [2, 4, 6, 8, 10, 12, 14, 16]
    B = [2, 6, 12, 20, 30, 42, 56, 72]

• For Checkoff:
  • Get a printout of your program using prtext. Give the program to the lab instructor before he starts your check-off procedure.
  • He will give you a card with the numbers you should enter for N and A.
  • Run your program for those values.