2D Arrays in MIPS

-Derive the equation that finds the correct array index.

-To find the correct memory address from the equation you just derived, you need to multiply by the DATA_SIZE (thats how big each word is, 1 for chars, 4 for ints/floats, 8 for doubles)

Make a simple program work to sum up the diagonals of a matrix.

Note that the loop works on a variable called size which is toward the top.

Modify your program to work on a 3x3 array and show that it works.

the next two lines define an array (mdArray as a 2x2 multidimensional array) rray: word 2,5 .word 3,7 izeword 2 #dimension of the array (2x2 in this case, note this is only for are matrices) number of bytes per element, 4 for ints, 1 for chars , 8 for DATA SIZE 4 bles ext in: sao, mdAr ray # base address $al, size # size I sumDiagonal #sum of diagonals, in our starting example, this is 9. ve $a0, $v0 # this is because sumDiagonal will return it's last value in $v0 $v0, 1 scall nd done $v0, 10 scall iagonal: $v0,0 #sum =0 $t0, 0 #t0 as the index sunLoop: #The next 4 lines are the bit you need to derive and fill in yourself add add lw $t2, (St1) #getting element add $v0 , $v0 , $t2 # sum = sum + mdArray[1][i] blt $to , Sal, sumLoop #if i