test_fsubx_1:
  #_ REGISTER_IN f4 [4008000000000000]
  #_ REGISTER_IN f5 [3FF0000000000000]
  fsub. f3, f4, f5
  blr
  #_ REGISTER_OUT f3 [4000000000000000]
  #_ REGISTER_OUT f4 [4008000000000000]
  #_ REGISTER_OUT f5 [3FF0000000000000]

test_fsubx_2:
  #_ REGISTER_IN f4 [3FF0000000000000]
  #_ REGISTER_IN f5 [3FF0000000000000]
  fsub. f3, f4, f5
  blr
  #_ REGISTER_OUT f3 [0000000000000000]
  #_ REGISTER_OUT f4 [3FF0000000000000]
  #_ REGISTER_OUT f5 [3FF0000000000000]

test_fsubx_3:
  #_ REGISTER_IN f4 [4010000000000000]
  #_ REGISTER_IN f5 [4000000000000000]
  fsub. f3, f4, f5
  blr
  #_ REGISTER_OUT f3 [4008000000000000]
  #_ REGISTER_OUT f4 [4010000000000000]
  #_ REGISTER_OUT f5 [4000000000000000]

test_fsubx_4:
  #_ REGISTER_IN f4 [0000000000000000]
  #_ REGISTER_IN f5 [0000000000000000]
  fsub. f3, f4, f5
  blr
  #_ REGISTER_OUT f3 [0000000000000000]
  #_ REGISTER_OUT f4 [0000000000000000]
  #_ REGISTER_OUT f5 [0000000000000000]