# Carry-lookahead
+* cprop RT,RA,RB
+* cprop. RT,RA,RB
+
+pseudocode:
+
+ P = (RA)
+ G = (RB)
+ RT = ((P|G)+G)^P
+
+X-Form
+
+| 0.5|6.10|11.15|16.20| 21..30 |31| name | Form |
+| -- | -- | --- | --- | --------- |--| ---- | ------- |
+| NN | RT | RA | RB | 0110001110 |Rc| cprop | X-Form |
+
used not just for carry lookahead, also a special type of predication mask operation.
* <https://www.geeksforgeeks.org/carry-look-ahead-adder/>