CODEWITHSUNDEEP
assemblymips
user3251142
user3251142

Reputation: 175

MIPS: Target of jump differs in high-order 4 bits from instruction pc 0x400014

Alright, so I've started writing MIPS code to multiply two arrays. I wanted to put what I had so far into QtSpim to see if values would change as I was expecting them to.

However, when I try to load my file into QtSpim I am getting this error:
Target of jump differs in high-order 4 bits from instruction pc 0x400014

Do you see where I'm going wrong, or have any good ideas for debugging? I'm not sure what or where the problem is.

Thanks.

EDIT: This works:

main:
    la      $a2, array1
    la      $a3, array2
    li  $a1, 5
    li  $v0, 1
    add     $a0, $a1, $0
    syscall

    lw  $a0, 0($a2)
    syscall

    lw  $a0, 0($a3)
    syscall

    li  $v0, 10
    syscall
.data
array1: .word 10, 10, 10, 10, 5
array2: .word -10, -10, 10, 10, 5

Full code:

.data
array1: .word 10, 10, 10, 10, 5
array2: .word -10, -10, 10, 10, 5

main:

li $a2, 5
addiu $15, $a2, 1
la $a0, array1
la $a1, array2
j MAC

MAC:

addiu $sp, $sp, -4
sw $ra, 4($sp)
li $v1, 0
li $s0, 0

loopInMAC:

beq $s0, $15, main2
j mult1
add $v1, $v1, $v0
addiu $s0, $s0, 1
j loopInMAC

mult1:

lw $s1, 0($a0)
lw $s2, 0($a1)
slt $s3, $s1, 0
slt $s4, $s2, 0
addiu $sp, $sp, -4
sw $ra 0($sp)
bne $s3, 1, skip1
sub $s1, $0, $s1

skip1:

bne $s4, 1, skip2
sub $s2, $0, $s2

skip2:

li $v0, 0

loopInMult:

beq $s1, $0, skip3
andi $t0, $s1, 1
beq $t0, $0, skipAdd
add $v0, $v0, $s2

skipAdd:

sll $s2, $s2, 1
srl $s1, $s1, 1
j loopInMult

skip3:

beq $s1, $s2, equalSign
sub $v0, $0, $v0

equalSign:
jr $ra

Upvotes: 1

Views: 8271

Answers (1)

Michael
Michael

Reputation: 58427

Don't place code in the .data section. You should start the .text (code) section before main:, i.e:

.text
main:

Also, you've got a couple of instructions placed before main: that currently will never be executed. I suspect that those are meant to be placed after main:

Upvotes: 5

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