ori r4, r0, 0x0020
ori r5, r0, 0x0040
lw r8, 0(r4)
lw r9, 0(r5)
addu r9, r8, r9
sw r9, 0(r5)
addiu r4, r4, 4
addiu r5, r5, 4
bne r9, r0, -7