| IN1 | IN2 | IN3 | IN4 | OUT | 
| fx | fx | fx | fx | 0 - 0 | 
| + | 
| 0 | 
| - | 
| - | 
| - | 
| - | 
| -inf | 
| + | 
| 0 | 
| - | 
| - | 
| - | 
| - | 
| -inf | 
| + | 
| 0 | 
| - | 
| - | 
| - | 
| - | 
| -inf | 
| + | 
| 0 | 
| - | 
| - | 
| - | 
| - | 
| -inf | 
| + | 
| 0 | 
| - | 
| - | 
| - | 
| - | 
| -inf | 
 
				