MIPS Quicksort程序显示异常4 [在inst / data fetch中的地址错误]

Question

我正在学习MIPS。我试着在Quicksort上编写一个程序（没有递归）。 我写了以下代码。它需要排序的元素数量的元素和数字作为输入搜索，返回数字的数组索引，

.data
    .align 2
    myArray: .space 4000    #1000 elements atmost
prompt1: .asciiz "Enter n : "
prompt2: .asciiz " "
prompt3: .asciiz "\nEnter Sorted Array: "
prompt4: .asciiz "Enter number to be sorted"

.text

main:
    li $v0, 4
    la $a0, prompt1
    syscall

    li $v0, 5
    syscall


    move $s1, $v0,    #n
    addi $s0, $s1, -1 

    li $v0, 4
    la $a0, prompt4
    syscall

    li $v0, 5
    syscall        

    move $s2, $v0    #stores k ,  number to be searched


addi $t0, $zero, 0        #clear values in $t0


    li $v0, 4
    la $a0, prompt3
    syscall

input:


    li $v0, 5           # reading inputs
    syscall

    add $t1, $t0, $zero


    add $t3, $v0, $zero

    sll $t1, $t0, 2

    sw $t3, myArray($t1)
    addi $t0, $t0, 1    
    slt $t1, $s0, $t0

    beq $t1, $zero, input


    addi $t0, $zero, 0  # $t0 stores left
    sll $t1, $s0, 2     #t1 stores right    
    add $t2, $t1, $t0   
    srl $t2, $t2, 1     # $t2 stores mid


    BinSearch:

    bge $t0, $t1 , exit 

    lw $t6, myArray($t2)        #showing Error here

    blt $t6, $s2, leftindex      # if(A[mid]<k) goto left

    beq $t6, $s2, found

    bgt $t6, $t2, rightindex


    leftindex:
    addi    $t0, $t2, 1     # left index leftindex= mid + 1
    add $t2, $t1, $t0       # mid = left + right 
    srl $t2, $t2, 1         # mid/2
    j BinSearch             #goback to Binary Search 

    found:
    li $v0, 1               #if(A[leftindex]==k)
    addi $a0, $t0, 0        #print index of k
    syscall
    j exit                  #exit programme

    rightindex:             
    addi $t1, $t2, -1   #rightindex = mid -1
    add $t2, $t1, $t0   #mid = left+right
    srl $t2, $t2, 1     #mid/2 
    j BinSearch         #goback to binarysearch


    exit:

    li $v0, 10
    syscall

它给了我错误：异常4 [实例/数据获取中的Adderess错误]

它在第70-72行给出了我的错误

    lw $t6, myArray($t2)

    blt $t6, $s2, leftindex  

我在代码中也提到该行作为评论

请告诉我我做错了什么。