Path segmentation is introduced when specifying invalid startpoint or endpoint for the
-to options of the
set_min_delay commands only. When a
set_max_delay introduces path segmentation on a path, the default hold analysis no longer takes place. You must constrain the same path with
set_min_delay if you desire to constrain the hold analysis as well. The same rule applies with the
set_min_delay command relative to the setup analysis.
Path segmentation must only be used by experts as it alters the fundamentals of timing analysis:
- Path segmentation breaks clock skew computation on the segmented path.
- Path segmentation can break more paths than the one constrained by the segmenting