before op1 = 0x10000000
before op2 = 0x10000000
before op3 = 0x12345678
after  op1 = 0x10000000
after  op2 = 0x12345678
after  op3 = 0x12345678
cc = 0
before op1 = 0x10000000
before op2 = 0x20000000
before op3 = 0x12345678
after  op1 = 0x20000000
after  op2 = 0x20000000
after  op3 = 0x12345678
cc = 1