MIPS大会回文

Question

我正在尝试检查一组字符串是否是回文。我已经确保检查字符串的长度，以便如果它命中null，它将返回到字符串中的最后一个字母。我不确定我是否做对了。然后，我比较字符串的最后一个字符和第一个字符，并继续进行直到它到达中间为止。这是我目前拥有的：

CheckPalindrome:
addi $t0, $a0, 0
addi $t1, $t0, 0

StrLen:
lbu  $t2, 0($t1)
beq  $t2, $0, End #If equal to 0 end loop
addi $t1, $t1, 1
j    StrLen #Loop

End:
addi $t1, $t1, -1

Compare:
#If string is less than 2 then is palindrome
slti $t0, $t0, 2
bne $t0, $0, True

#Compare first and last characters
lbu  $t0, 0($a0) #load first character to t0
addi $t1, $t1, -1 #t1 points to the last letter in string
lbu  $t1, 0($t1) #load last character into t1
add $t1, $t1, $a0
bne  $t0, $t1, False #If first and last char not equal, return false

addi $a2, $a2, -2
addi $a0, $a0, 1
j Compare

True:
addi $v0, $0, 1 
jr   $ra

False:
addi $v0, $0, 0 
jr   $ra

当前输出为：

 is not a palindrome.
a is not a palindrome.
b is not a palindrome.
aba is not a palindrome.
abba is not a palindrome.
baab is not a palindrome.
ababa is not a palindrome.
aabba is not a palindrome.
abbab is not a palindrome.

这显然是不正确的，因此有关如何更正此问题的任何输入都是很好的。