test_vcfux_1:
  #_ REGISTER_IN v4 [00000001, 00000002, 00000003, 00000004]
  vcfux v5, v4, 0
  blr
  #_ REGISTER_OUT v4 [00000001, 00000002, 00000003, 00000004]
  #_ REGISTER_OUT v5 [3F800000, 40000000, 40400000, 40800000]

test_vcfux_2:
  #_ REGISTER_IN v4 [00000000, 00000000, 00000000, 00000000]
  vcfux v5, v4, 0
  blr
  #_ REGISTER_OUT v4 [00000000, 00000000, 00000000, 00000000]
  #_ REGISTER_OUT v5 [00000000, 00000000, 00000000, 00000000]

test_vcfux_3:
  #_ REGISTER_IN v4 [00000008, 00000010, 00000020, 00000040]
  vcfux v5, v4, 1
  blr
  #_ REGISTER_OUT v4 [00000008, 00000010, 00000020, 00000040]
  #_ REGISTER_OUT v5 [40800000, 41000000, 41800000, 42000000]

test_vcfux_4:
  #_ REGISTER_IN v4 [00000100, 00000200, 00000400, 00000800]
  vcfux v5, v4, 4
  blr
  #_ REGISTER_OUT v4 [00000100, 00000200, 00000400, 00000800]
  #_ REGISTER_OUT v5 [41800000, 42000000, 42800000, 43000000]

test_vcfux_5:
  #_ REGISTER_IN v4 [000000FF, 000001FF, 000003FF, 000007FF]
  vcfux v5, v4, 0
  blr
  #_ REGISTER_OUT v4 [000000FF, 000001FF, 000003FF, 000007FF]
  #_ REGISTER_OUT v5 [437F0000, 43FF8000, 447FC000, 44FFE000]