Complete Truth Table for an AddSub 10bit and FASTRCA12

/**

* Adds or Subtracts two 10-bit values.

* Both inputs a and b are in SIGNED 2s complement format

* when sub == 0, the chip performs add i.e. out=a+b

* when sub == 1, the chip performs subtract i.e. out=a-b

* carry reflects the overflow calculated for 10-bit add/subtract in 2s complement

*/

| a | b |sub| out | carry |

| 0000000000 | 0000000000 | 0 | 0000000000 | 0 |

/**

* Optimizes the carry propagation delay along RCA4 boundaries

* using duplication and parallel assembly of logic

* The chip performs out=a+b

* Both inputs a and b are in UNSIGNED format

* carry output reflects the overflow

*/

| a | b | out | carry |

| 000000000000 | 000000000000 | 000000000000 | 0 |