multicycle path

Thanks Rysc for the examples, I am trying to digest them.

One other thing that confuses beginners is that while the concept of multicycle is built around the idea of enabled register, however the multicycle constraint itself applies to a path between two registers !

The aim of constraining path is to get timing of destination register under control. if the source register and destination register are both on same enable then the rule applies to the path in between.

If an enabled register sources a differently-enabled or non-enabled register then the path should not be included as multicycle.