test_rlwimi:
  #_ REGISTER_IN r4 0xCAFEBABE90003000
  #_ REGISTER_IN r6 0xDEADBEEF00000003
  rlwimi r6, r4, 2, 0, 0x1D
  blr
  #_ REGISTER_OUT r4 0xCAFEBABE90003000
  #_ REGISTER_OUT r6 0xDEADBEEF4000C003