CODEWITHSUNDEEP
arraysassemblyprintingmips
Christina J
Christina J

Reputation: 83

assembly prints out selectively

I want take 8 inputs and create two 2X2 arrays in assembly. However when i run it it only asks me for a(1,1)a(1,2)a(2,2)b(1,2)b(2,2) and then error. What is wrong?I want to use doubles not integers.That is my code

.data

arrA: .space 32
arrB: .space 32
arrC: .space 32

msg1: .asciiz "a(1,1)="
msg2: .asciiz "a(1,2)="
msg3: .asciiz "a(2,1)="
msg4: .asciiz "a(2,2)="
msg5: .asciiz "b(1,1)="
msg6: .asciiz "b(1,2)="
msg7: .asciiz "b(2,1)="
msg8: .asciiz "b(2,2)="


.text
.globl main

main:

la $a0, arrA
la $a1, arrB
la $a2, arrC

#Prints msg1
li $v0, 4
la $a0, msg1
syscall

li $v0, 7
syscall
sdc1 $f0, 0($a0)

#Prints msg2
li $v0, 4
la $a0, msg2
syscall

li $v0, 7
syscall
sdc1 $f0, 8($a0)

#Prints msg3
li $v0, 4
la $a0, msg3
syscall

li $v0, 7
syscall
sdc1 $f0, 16($a0)

#Prints msg4
li $v0, 4
la $a0, msg4
syscall

li $v0, 7
syscall
sdc1 $f0, 24($a0)

#Prints msg5
li $v0, 4
la $a0, msg5
syscall

li $v0, 7
syscall
sdc1 $f0, 0($a1)

#Prints msg6
li $v0, 4
la $a0, msg6
syscall

li $v0, 7
syscall
sdc1 $f0, 8($a1)

#Prints msg7
li $v0, 4
la $a0, msg7
syscall

li $v0, 7
syscall
sdc1 $f0, 16($a1)

#Prints msg8
li $v0, 4
la $a0, msg8
syscall

li $v0, 7
syscall
sdc1 $f0, 24($a0)`

Upvotes: 1

Views: 44

Answers (1)

Michael
Michael

Reputation: 58507

For each of the system calls that require integer arguments, you're modifying $a0. And once you've done that, $a0 no longer contains the address of arrA. So you end up storing the doubles into the memory where your strings are located.

The easiest solution would be to use another register for the address of arrA.

And you really ought to simplify this into a loop, since you're just doing the same thing 8 times.

Upvotes: 2

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