从C到MIPS32的字符比较

#include <stdio.h>
#include <string.h>

int main() {
    char str1[] = "hello";
    char str2[] = "world";

    int result = strcmp(str1, str2);
    if (result < 0) {
        printf("str1 is less than str2\n");
    } else if (result > 0) {
        printf("str1 is greater than str2\n");
    } else {
        printf("str1 is equal to str2\n");
    }

    return 0;
}

.data
str1: .asciiz "hello"
str2: .asciiz "world"

.text
.globl main
main:
    la $t0, str1       # Load address of str1 into $t0
    la $t1, str2       # Load address of str2 into $t1

    loop:
        lb $t2, 0($t0) # Load byte from str1 into $t2
        lb $t3, 0($t1) # Load byte from str2 into $t3
        beq $t2, $zero, end_loop # If end of string, jump to end_loop
        bne $t2, $t3, compare_done # If characters are not equal, jump to compare_done
        addi $t0, $t0, 1 # Increment str1 pointer
        addi $t1, $t1, 1 # Increment str2 pointer
        j loop

    compare_done:
        blt $t2, $t3, str1_less # If str1 < str2
        bgt $t2, $t3, str1_greater # If str1 > str2
        li $v0, 4           # Print "str1 is equal to str2"
        la $a0, equal_msg
        syscall
        j exit

    str1_less:
        li $v0, 4           # Print "str1 is less than str2"
        la $a0, less_msg
        syscall
        j exit

    str1_greater:
        li $v0, 4           # Print "str1 is greater than str2"
        la $a0, greater_msg
        syscall
        j exit

    end_loop:
        li $v0, 4           # Print "str1 is less than str2"
        la $a0, less_msg
        syscall

    exit:
        li $v0, 10          # Exit program
        syscall

.data
equal_msg: .asciiz "str1 is equal to str2\n"
less_msg: .asciiz "str1 is less than str2\n"
greater_msg: .asciiz "str1 is greater than str2\n"