我一直在尝试使用堆栈在MIPS中复制一个单词数组,由于某种原因它不起作用,我无法弄清楚为什么......请帮忙,谢谢! :)
.data
array: .word 1, 3, 5, 7, 9, 11, 13, 15, 17, 19
.word 21, 23, 25, 27, 29, 31, 33, 35, 37, 39
.word 41, 43, 45, 47, 49, 51, 53, 55, 57, 59
length: .word 30
array2: .space 120
text: .asciiz "\n\nArray 1 is: \n\n"
text2: .asciiz "\n\nArray 2 is: \n\n"
.text
.globl main
main:
la $t0, array
li $t1, 0
lw $t2, length
la $t3, array2
loopToPushOntoStack:
lw $t4, ($t0) #load first element of the array onto t4
sub $sp, $sp, 4 #move stack pointer down by 4
sw $t4, ($sp) #store t4 onto stack
add $t0, $t0, 4 #increment array pointer by 4
add $t1, $t1, 1 #increment counter by 1
blt $t1, $t2, loopToPushOntoStack
Reset:
la $t0, array
li $t1, 0
lw $t2, length
loopToPopStack:
lw $t4 ($sp)
move $a0, $t4
li $v0, 1
syscall
addu $sp, $sp, 4
sw $t4, ($t0)
sw $t4, ($t3)
add $t0, $t0, 4
add $t3, $t3, 4
add $t1, $t1, 1
blt $t1, $t2, loopToPopStack
la $s3, text
move $a0, $s3
li $v0, 4
syscall
li $t1, 0
printArrayOne:
lw $s4, ($t0)
move $a0, $s4
li $v0, 1
syscall
add $t0, $t0, 4
add $t1, $t1, 1
blt $t1, $t2, printArrayOne
la $s4, text2
move $a0, $s4
li $v0, 4
syscall
li $t1, 0
printArrayTwo:
lw $s5, ($t3)
move $a0, $s5
li $v0, 1
syscall
add $t3, $t3, 4
add $t1, $t1, 1
blt $t1, $t2, printArrayTwo
exit:
li $v0, 10
syscall
P.S。我认为问题出现在以下函数中:
loopToPopStack:
lw $t4 ($sp)
move $a0, $t4
li $v0, 1
syscall
addu $sp, $sp, 4
sw $t4, ($t0)
sw $t4, ($t3)
add $t0, $t0, 4
add $t3, $t3, 4
add $t1, $t1, 1
blt $t1, $t2, loopToPopStack
但是我无法弄清楚它究竟是什么问题哈哈。
答案 0 :(得分:1)
没关系,修好了!在打印它之前,我需要将$ t0重置为数组,并将$ t3重置为数组2,或者它们指向超出数组起始地址的120个字节。