dcfifo timing details

Synthesis the FIFO by itself and launch the RTL viewer(or just dive down to it from your full design). The actual synthesized nodes are a pain and so the combinatorial names in TimeQuest won't help, but the RTL viewer should be good enough to give a sense of what's going on, specifically when you see sub-hierarchies with names like gray2bin. Just push down into the FIFO, and use right-click to filter from/to things you've highlighted. It's not going to give exact details, but enough to know where the pipelines are at, what's being compared, etc.