A logic option that enables or disables logic cell insertion by the Fitter when the logic cells are not part of a carry or cascade chain. When this option is turned on, the Fitter inserts logic cells where they are needed to improve fitting. When this option is turned off, the Fitter inserts logic cells only to solve deterministic no fits.

This option is useful for preventing the Fitter from inserting logic cells that may increase propagation delay.

This option is ignored if it is assigned to anything other than a design entity. This option is available for ACEX^® 1K and FLEX 10KE devices.