verilator/test_regress/t/t_flag_csplit.v

// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed into the Public Domain, for any use,
// without warranty, 2005 by Wilson Snyder.

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

   integer 	cyc=0;

   parameter CNT = 10;

   wire [31:0] 	w [CNT:0];

   generate
      for (genvar g=0; g<CNT; g++)
	sub sub (.clk(clk), .i(w[g]), .z(w[g+1]));
   endgenerate

   // Test loop
   always @ (posedge clk) begin
      cyc <= cyc + 1;
      if (cyc==0) begin
	 // Setup
	 w[0] = 32'h1234;
      end
      else if (cyc<90) begin
      end
      else if (cyc==99) begin
`define EXPECTED_SUM 32'h123e
`ifdef TEST_VERBOSE
	 $write("[%0t] cyc==%0d  sum=%x\n",$time, cyc, w[CNT]);
`endif
	 if (w[CNT] !== `EXPECTED_SUM) $stop;
	 $write("*-* All Finished *-*\n");
	 $finish;
      end
   end

endmodule

module sub (input clk, input [31:0] i, output [31:0] z);
   always @(posedge clk)
     z <= i+1+$c("0");  // $c so doesn't optimize away
endmodule