verilator/test_regress/t/t_castdyn_enum.v

// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed under the Creative Commons Public Domain.
// SPDX-FileCopyrightText: 2020 Wilson Snyder
// SPDX-License-Identifier: CC0-1.0

typedef enum {
  TEN = 10,
  ELEVEN = 11,
  SIXTEEN = 16
} enum_t;

module t (  /*AUTOARG*/
    // Inputs
    clk
);
  input clk;

  int i;
  int i_const;
  int cyc;
  enum_t en;

  // Constant propagation tests
  initial begin
    en = SIXTEEN;
    i_const = $cast(en, 1);
    if (i_const != 0) $stop;
    if (en != SIXTEEN) $stop;

    en = SIXTEEN;
    i_const = $cast(en, 10);
    if (i_const != 1) $stop;
    if (en != TEN) $stop;
  end

  // Test loop
  always @(posedge clk) begin
    i = $cast(en, cyc);
`ifdef TEST_VERBOSE
    $write("[%0t] cyc==%0d i=%0d en=%0d\n", $time, cyc, i, en);
`endif
    cyc <= cyc + 1;
    if (cyc == 10) begin
      if (i != 1) $stop;
      if (en != TEN) $stop;
    end
    else if (cyc == 11) begin
      if (i != 1) $stop;
      if (en != ELEVEN) $stop;
    end
    else if (cyc == 12) begin
      if (i != 0) $stop;
      if (en != ELEVEN) $stop;
    end
    else if (cyc == 16) begin
      if (i != 1) $stop;
      if (en != SIXTEEN) $stop;
    end
    else if (cyc == 17) begin
      if (i != 0) $stop;
      if (en != SIXTEEN) $stop;
    end
    else if (cyc == 99) begin
      $write("*-* All Finished *-*\n");
      $finish;
    end
  end

endmodule