MIPS：将两个数组的元素相加

Question

我正在尝试在 QtSpim 中执行以下功能： A[i] = B[i] + C[i]

     .data
atable: .byte 0, 0, 0, 0
btable: .byte 10, 5, 5, 20
ctable: .byte 10, 4, 5, 1
spa: .byte 32

        .text
    .globl main

main:
    add $t4, $zero, $zero   # i is initialized to 0, $t4 = 0
    la $t0, atable 
    la $t1, btable
    la $t2, ctable
Loop:
    add $t5, $t4, $t1      # $t5 = address of b[i]
    lw $t6, 0($t5)         # $t6 = b[i]
    add $t5, $t4, $t2      # $t5 = address of c[i]
    lw $t7, 0($t5)         # $t7 = c[i]
    add $t6, $t6, $t7      # $t6 = b[i] + c[i]
    add $t5, $t4, $t0      # $t5 = address of a[i]
    sw $t6, 0($t5)         # a[i] = b[i] + c[i]
   
 li $v0,1
    move $a0,$t6        # $t0 = $t1 $a0,$t6
    syscall
  
  li $v0,4
    la $a1,spa
    syscall
    
addi $t4, $t4, 4       # i = i + 4
    slti $t5, $t4, 4       # $t5 = 1 if $t4 < 5, i.e. i < 2
    bne $t5, $zero, Loop   # go to Loop if i < 5
    
jr $ra
    # alternate exit
    exit:
    li $v0, 10
    syscall

以上代码的执行结果是“内存越界错误”消息和我的控制台中的输出： 352979220(空)

我很确定打印值和换行符转义序列 (/n) 存在问题，但我相信问题不止于此，因为我的代码在添加打印系统调用之前不起作用.

有什么建议吗？

Answer 1

经过一些修改：

          .data
    atable: .word 0, 0, 0, 0  # integers array (32 bits or 4 bytes each one)
    btable: .word 10, 5, 5, 20
    ctable: .word 10, 4, 5, 1
    spa: .asciiz " "

            .text
        .globl main

    main:

        la $t0, atable 
        la $t1, btable
        la $t2, ctable
        li $s0,0        # counter initialized to 0
    Loop:

        lw $t6, ($t1)         # $t6 = b[i]

        lw $t7, ($t2)         # $t7 = c[i]
        add $t8, $t6, $t7      # $t8 = b[i] + c[i]

        sw $t8, ($t0)         # a[i] = b[i] + c[i]
       
     li $v0,1
        move $a0,$t8        # $a0 = b[i]+c[i]
        syscall
      
      li $v0,4
        la $a0,spa
        syscall
        
    addi $t1, $t1, 4       # b[i++]
    addi $t2,$t2,4         # c[i++]
    addi $t0,$t0,4         # a[i++]
        addi $s0,$s0,1      # count = count+1
        blt $s0, 4, Loop   # go to Loop if count < 4
        
        # alternate exit
        exit:
        li $v0, 10
        syscall

MIPS：将两个数组的元素相加

MIPS : summing the elements of two arrays

assembly

mips

qtspim