verilator/test_regress/t/t_inst_wideconst.v

// $Id$
// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed into the Public Domain, for any use,
// without warranty, 2004 by Wilson Snyder.

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

   input clk;
   integer cyc; initial cyc=1;

   reg [41:0] 		aaa;
   wire [41:0] 		bbb;

   // verilator public_module
   wire [41:0] 		z_0;
   wire [41:0] 		z_1;

   wide w_0(
	    .xxx( { {40{1'b0}},2'b11 } ),
	    .yyy( aaa[1:0] ),
	    .zzz( z_0 )
	    );

   wide w_1(
	    .xxx( aaa ),
	    .yyy( 2'b10 ),
	    .zzz( z_1 )
	    );

   assign bbb= z_0 + z_1;

   always @ (posedge clk) begin
      if (cyc!=0) begin
	 cyc <= cyc + 1;
	 if (cyc==1) begin
	    aaa <= 42'b01;
	 end
	 if (cyc==2) begin
	    aaa <= 42'b10;
	    if (z_0 != 42'h4) $stop;
	    if (z_1 != 42'h3) $stop;
	 end
	 if (cyc==3) begin
	    if (z_0 != 42'h5) $stop;
	    if (z_1 != 42'h4) $stop;
	 end
	 if (cyc==4) begin
	    $write("*-* All Finished *-*\n");
	    $finish;
	 end
      end
   end

endmodule

module wide (
	input [41:0]		xxx,
	input [1:0]			yyy,
	output [41:0]		zzz
	);
   // verilator public_module

   assign zzz = xxx+ { {40{1'b0}},yyy };

endmodule