Avoiding Priority Processing - 2023.1 English

Vivado Design Suite User Guide: Synthesis (UG901)

Document ID
UG901
Release Date
2023-06-09
Version
2023.1 English
  • The case statement in the previous coding example evaluates the values of input sel in priority order.
  • To avoid priority processing:
    • Use a parallel-case Verilog attribute to ensure parallel evaluation of the input sel.
    • Replace the case statement with:
      (* parallel_case *) case(sel)