LPM_ADD_SUB: Pipeline Parameter
Pipelining in the Megawizard GUI does not equal adding a pipeline after the LPM_ADD_SUB function.
Trades off Area vs. Performance.
- LPM_ADD_SUB with external register use less resources but slower.
- Must have FAST synthesis set for register to be merged into LE
- LPM_ADD_SUB with a single pipeline will use more resources but faster (* beware of the bypass path for tco)