test_rlwimix_1:
  #_ REGISTER_IN r3 0x0000000000000000
  #_ REGISTER_IN r4 0x0000000012345678
  rlwimi. r3, r4, 8, 16, 23
  blr
  #_ REGISTER_OUT r3 0x0000000000007800
  #_ REGISTER_OUT r4 0x0000000012345678

test_rlwimix_2:
  #_ REGISTER_IN r3 0x00000000FFFFFFFF
  #_ REGISTER_IN r4 0x0000000012345678
  rlwimi. r3, r4, 16, 8, 15
  blr
  #_ REGISTER_OUT r3 0x00000000FF78FFFF
  #_ REGISTER_OUT r4 0x0000000012345678

test_rlwimix_3:
  #_ REGISTER_IN r3 0x0000000000000000
  #_ REGISTER_IN r4 0x00000000FFFFFFFF
  rlwimi. r3, r4, 4, 20, 27
  blr
  #_ REGISTER_OUT r3 0x0000000000000FF0
  #_ REGISTER_OUT r4 0x00000000FFFFFFFF

test_rlwimix_4:
  #_ REGISTER_IN r3 0x00000000AAAAAAAA
  #_ REGISTER_IN r4 0x0000000012345678
  rlwimi. r3, r4, 0, 0, 31
  blr
  #_ REGISTER_OUT r3 0x0000000012345678
  #_ REGISTER_OUT r4 0x0000000012345678