程序查找单词匹配项的运行时异常

Question

在这个程序中，我试图在文本"你好吗"中找到单词"how"的出现，该单词在开头是硬编码的。但是由于某些原因，当我运行该程序时，它不会停止并且不打印任何内容。所以我只是想知道谁能告诉我我哪里错了？提前致谢

text: .ascii "how are you"
word: .ascii "how"
    .text
    .globl main
main:
Search:#search the occurrence of th word 
        li $s0, 0               # pointer for the text
        li $s1, 0               # pointer for the word 
        li $s7, 0               # counter for occrence
compare:lb $t0, text($s0)        
        addi $s0, $s0, 1
        lb $t1, word($s1)
        addi $s1, $s1, 1
        bne $t0, $t1, next_word # compare next word 
        beq $t6, $s1, bingo     # t6 is the length of the keyword
        j compare               # keep comparing 
bingo:    
        addi $s7, $s7, 1        # occrence + 1    
next_word:     
        li $s1, 0               # refresh the keyword    
loop:   lb $t0, text($s0)    
        addi $s0, $s0, 1    
        bne $t0, 32, loop    
        beq $t7, $s0, print_result     # we have searched the all text 
        j compare 
print_result: 
        la $a0, ($s7)
        li $v0, 1
        syscall
        li $v0, 10
        syscall

Answer 1

程序执行将导致

loop:   lb $t0, text($s0)    
        addi $s0, $s0, 1    
        bne $t0, 32, loop    

因为 $t 0 在第一次跳回"比较"后保持 0。使用 Mars(火星(中包含的分步调试器。也许尝试加载您的值

la $a0, text
lb $t0, 0($a0)

而不是

lb $t0, text($s0)