1Test #1 mask == 0, value == ~0 --> cc == 0 2OK 3Test #2 mask == 0xFF, value == 0 --> cc == 0 4OK 5Test #3 mask == 0xFF, value == 0xFF --> cc == 3 6OK 7Test #4 mask == 0x80, value == 0x80 --> cc == 3 8OK 9Test #5 mask == 0xF0, value == 0x90 --> cc == 1 10OK 11Test #6 mask == 0xF0, value == 0x30 --> cc == 1 12OK 13