想在更改后在内存中打印原始值

如何解决想在更改后在内存中打印原始值

我有这个代码

    .globl main 

    .text

# The label 'main' represents the starting point
main:

    li    $v0,4        # print_string syscall code = 4
    la    $a0,theString    # load the address of msg
    syscall
    
    li    $v0,newLine    # load the address of msg
    syscall
        
    jal capitalize    # call capitalize procedure

    # syscall to print value
    li      $v0,4      
    move    $a0,$t2 
    syscall
    
    li    $v0,newLine    # load the address of msg
    syscall
    
    li    $v0,theString    # load the address of msg
    syscall

    li $v0,10 # Sets $v0 to "10" to select exit syscall
    syscall # Exit

capitalize:

    li $t0,0
    la $t2,theString
    
    loopString:
        lb $t1,theString($t0)    # load the char
        beq $t1,finishLoop    # If done with iteration of string finish loop
        bgt $t1,'z',notLetter   # checks if char is not between 'a' and 'z'
        blt $t1,'a',notLetter
        sub $t1,$t1,32          # subtracts 32 from lowercase letter to get uppercase
        sb $t1,theString($t0)    # saves back the char

    notLetter: 
        # increments char loop by one
        addi $t0,$t0,1
        j loopString
        
    finishLoop:    
    
        jr $ra

.data
theString: .asciiz "test"
newLine:   .asciiz "\n"

目前正在打印

test
TEST
TEST

但是，我很难让它看起来像

test
test
TEST

原始字符串打印两次的地方。我想知道是否有任何技巧可以解决这个问题？我曾经考虑过堆栈分配，但在尝试之后我一直遇到不同的问题。

解决方法

 .globl main 

    .text

# The label 'main' represents the starting point
main:

    li    $v0,4        # print_string syscall code = 4
    la    $a0,theString    # load the address of msg
    syscall
    
    li    $v0,newLine    # load the address of msg
    syscall
        
    jal capitalize    # call capitalize procedure

    # syscall to print value
    li      $v0,4      
    la    $a0,oldString 
    syscall
    
    li    $v0,newLine    # load the address of msg
    syscall
    
    li    $v0,theString    # load the address of msg
    syscall

    li $v0,10 # Sets $v0 to "10" to select exit syscall
    syscall # Exit

capitalize:

    li $t0,0
    la $t2,theString
    
    loopString:
        lb $t1,theString($t0)    # load the char
        beq $t1,finishLoop    # If done with iteration of string finish loop
        bgt $t1,'z',notLetter   # checks if char is not between 'a' and 'z'
        blt $t1,'a',notLetter
        sub $t1,$t1,32          # subtracts 32 from lowercase letter to get uppercase
        sb $t1,theString($t0)    # saves back the char

    notLetter: 
        # increments char loop by one
        addi $t0,$t0,1
        j loopString
        
    finishLoop:    
    
        jr $ra

.data

oldString: .asciiz "test"
theString: .asciiz "test"
newLine:   .asciiz "\n"