18.104.22.168. Multicycle Clock Setup
An end multicycle setup assignment modifies the latch edge of the destination clock by moving the latch edge the specified number of clock periods to the right of the determined default latch edge. The following figure shows various values of the end multicycle setup (EMS) assignment and the resulting latch edge.
A start multicycle setup assignment modifies the launch edge of the source clock by moving the launch edge the specified number of clock periods to the left of the determined default launch edge. A start multicycle setup (SMS) assignment with various values can result in a specific launch edge.