Question

# ECE 445 Computer Organization # Homework 3, problem 9 # Write a MIPS assembly language program to count the number of positive values in an array of integers. # The array of integers and the array length are provided in the .data section below. # After running your code, the variable count (in memory) should contain the number of positive values in the array Insert your name here > Insert the date here > # Author: # Date: .text globl main main: la $t1, lenA la $t2, arrayA # load the address of variable lenA into St1 # load the starting address of arrayA into $t2 Specify your name and the date in the comments above. #Insert your code here! .. # put breakpoint on this line when running your code nop .data 0x100100ee # Specify the length of the array here (maximum length = 255 elements) # Specify the integer array here (the number of elements must be the same as the length specified above) .byte arrayA .word lenA .word e count

Answer 1

Answer :- The MIPS assembly code has been written below-

.text

.globa; main

main : la $t1, lenA # $t1 = address of variable lenA

la $t2, arrayA # load starting address of arrayA into $t2

la $t3, count # load address of variable count in to $t3

lb $s2, ($t1) # $s2 = number of elements in the array

lw $s3, ($t3) # $s3 = count value from variable count

Loop1 : # label named as Loop1

lw $s1, ($t1) # $s1 = value from address kept in $t1

bgez $s1, Count1 # if $s1 has value greater than equal to zero (+ve value) then go to label named as Count1

Back1 : # label named as Back1

addi $t1, $t1, 4 # $t1 points to next word element of the array

addi $s2, $s2, -1 # $s2 = $s2 - 1, decrease the number of element count

bgtz $s2, Loop1 # if $s2 is not zero then go to label named as Loop1

Count1 : # label named as Loop1

addi $s3, $s3, 1 # increment the count value by 1

sw $s3, ($t3) # put the result back to the memory

j Back1 # go to label named as Back1

nop

.data 0x10010000

lenA : .byte 10 # length of the array is 10

arrayA : .word 3, 5, -2, 56, -18, 0, 98, 71, -88, 26, 10 # 10 array integers

count : .word 0 # initially count is equal to zero