Adding stub file for tb_dut wrapper

stdlib/testbench/tb_dut.v

@@ -0,0 +1,35 @@
+//#############################################################################
+//# Function: DUT wrapper template/stub
+//#############################################################################
+//# Author:   Andreas Olofsson                                                #
+//# License:  MIT (see LICENSE file in OH! repository)                        #
+//#############################################################################
+
+module tb_dut
+  #(parameter PW              = 256,      // packet width
+    parameter N               = 36,       // ctrl/status width
+    parameter TARGET          = "DEFAULT" // physical synthesis/sim target
+    )
+   (// basic test interface
+    input 	    clk, // standard clock used for interface
+    input 	    fastclk, // fast clock (optional for core)
+    input 	    slowclk, // fast clock (optional for core)
+    input 	    nreset, // async active low reset
+    input 	    go, // go dut (if not self-booting)
+    input [N-1:0]   ctrl, // env generic ctrl vector
+    // environment packet interface
+    input 	    valid, // env packet valid signal
+    input [PW-1:0]  packet, // env packet to drive
+    input 	    ready, // env is ready for packet
+    // dut status signals
+    output 	    dut_active, // dut reset sequence done
+    output 	    dut_error, // per cycle error signal
+    output 	    dut_done, // dut is done
+    output [N-1:0]  dut_status, // dut generic status vector
+    // dut response packets
+    output 	    dut_valid, //dut packet valid signal
+    output [PW-1:0] dut_packet, // dut packet to drive
+    output 	    dut_ready // dut is ready for packet
+    );
+
+endmodule // tb_dut