Doubt regarding pipeline rewind

[karthikrrao]

Hello,

I am new to Vitis/ Vivado HLS. I came across the pipeline pragma directive and saw the rewind option. But I am not able to understand the difference between a pipeline with rewind and a pipeline without rewind. Could someone please explain the difference between the two with an example.

Thank you!

[dpaul24 · Accepted solution]

@karthikrrao ,

This is what the UG871 has to say about rewind:

When the top-level of the design is a loop, you can use the pipeline rewind option. This informs Vivado HLS that when implemented in RTL, this loop runs continuously (with no end of function and function re-start cycles).