Avoiding Priority Processing - 2023.2 English

Vivado Design Suite User Guide: Synthesis (UG901)

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2023.2 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)