Logic - 6 (Invert Bytes)

.data
.text
main:
    ori $at, $zero, 0x76543210
    or $v0, $zero, $at
    or $v1, $zero, $at
    srl $at, $at, 28
    sll $v0, $v0, 4
    srl $v0, $v0, 28
    sll $v0, $v0, 4
    or $at, $v0, $at
    and $v0, $v0, $zero
    or $v0, $v1, $zero
    sll $v0, $v0, 8
    srl $v0, $v0, 28
    sll $v0, $v0, 8
    or $at, $v0, $at
    and $v0, $v0, $zero
    or $v0, $v1, $zero
    sll $v0, $v0, 12
    srl $v0, $v0, 28
    sll $v0, $v0, 12
    or $at, $v0, $at
    and $v0, $v0, $zero
    or $v0, $v1, $zero
    sll $v0, $v0, 16
    srl $v0, $v0, 28
    sll $v0, $v0, 16
    or $at, $v0, $at
    and $v0, $v0, $zero
    or $v0, $v1, $zero
    sll $v0, $v0, 20
    srl $v0, $v0, 28
    sll $v0, $v0, 20
    or $at, $v0, $at
    and $v0, $v0, $zero
    or $v0, $v1, $zero
    sll $v0, $v0, 24
    srl $v0, $v0, 28
    sll $v0, $v0, 24
    or $at, $v0, $at
    and $v0, $zero, $zero
    and $v1, $zero, $zero