.org 0x0
   .set noat
   .global _start
_start:
   lui $1,0x0000          # $1 = 0x00000000
   lui $2,0xffff          # $2 = 0xffff0000
   lui $3,0x0505          # $3 = 0x05050000
   lui $4,0x0000          # $4 = 0x00000000 

   movz $4,$2,$1          # $4 = 0xffff0000
   movn $4,$3,$1          # $4 = 0xffff0000
   movn $4,$3,$2          # $4 = 0x05050000
   movz $4,$2,$3          # $4 = 0x05050000

   mthi $0                # hi = 0x00000000
   mthi $2                # hi = 0xffff0000
   mthi $3                # hi = 0x05050000
   mfhi $4                # $4 = 0x05050000

   mtlo $3                # li = 0x05050000
   mtlo $2                # li = 0xffff0000
   mtlo $1                # li = 0x00000000
   mflo $4                # $4 = 0x00000000