8bitworkshop/test/cli/verilog/t_select_index.v

// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed under the Creative Commons Public Domain, for
// any use, without warranty, 2003-2007 by Wilson Snyder.
// SPDX-License-Identifier: CC0-1.0

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

   // surefire lint_off NBAJAM

   input  clk;
   reg [7:0] _ranit;

   reg [2:0] a;
   reg [7:0] vvector;
   reg [7:0] vvector_flip;

   // surefire lint_off STMINI
   initial _ranit = 0;

   always @ (posedge clk) begin
      a <= a + 3'd1;
      vvector[a] <= 1'b1;	// This should use "old" value for a
      vvector_flip[~a] <= 1'b1;	// This should use "old" value for a
      //
      //========
      if (_ranit==8'd0) begin
	 _ranit <= 8'd1;
	 $write("[%0t] t_select_index: Running\n", $time);
	 vvector <= 0;
	 vvector_flip <= 0;
	 a <= 3'b1;
      end
      else _ranit <= _ranit + 8'd1;
      //
      if (_ranit==8'd3) begin
	 $write("%x %x\n",vvector,vvector_flip);
	 if (vvector !== 8'b0000110) $stop;
	 if (vvector_flip !== 8'b0110_0000) $stop;
	 //
	 $write("*-* All Finished *-*\n");
	 $finish;
      end
   end

endmodule