?? testbench_barrel.v
字號:
`include "barrel.v"module top_Barrel_Shifter; reg [31:0] Input_Bus; reg [1:0] Shift_Type; reg [4:0] Shift_Amt; reg Cin,Enable; wire [31:0] Output_Bus; wire Cout; integer i; integer file; //the number for the log file integer num_tests; //the number of tests run Barrel_Shifter BS1(Enable,Input_Bus,Shift_Type,Shift_Amt,Cin,Output_Bus,Cout); initial begin num_tests = 0; $stop; file = $fopen ("test_barrel.out"); //open the log file $fdisplay (file,"barrel Test Log"); $fdisplay (file,"___________________"); //No Shift->Pass Data from Input to data Enable=0; Cin=0; Shift_Amt=5'b00000; Shift_Type=2'b00; Input_Bus=32'b00000000000000000000000000000000; out_to_file; for (i=0;i<=31;i=i+1) begin Input_Bus=Input_Bus + 32'b00000000000000000000000000000001; out_to_file; #10; end // for (i=0;i<=31;i=i+1) // Left Shift Enable=1; Shift_Type=2'b00; Input_Bus[31:0]=32'b00000000000000000000000000000001; Shift_Amt=5'b00000; out_to_file; #10; Shift_Amt=5'b00001; out_to_file; #10; Shift_Amt=5'b00010; out_to_file; #10; Shift_Amt=5'b00011; out_to_file; #10; Shift_Amt=5'b00100; out_to_file; #10; Shift_Amt=5'b00101; out_to_file; #10; //Right Shift Input_Bus[31:0]=32'b00000000000000000000000000100000; Enable=1; Shift_Type=2'b01; Shift_Amt=5'b00000; out_to_file; #10; Shift_Amt=5'b00001; out_to_file; #10; Shift_Amt=5'b00010; out_to_file; #10; Shift_Amt=5'b00011; out_to_file; #10; Shift_Amt=5'b00100; out_to_file; #10; Shift_Amt=5'b00101; out_to_file; #10; //Arithmetic Shift right Input_Bus[31:0]=32'b10000000000000000000000000000000; Enable=1; Shift_Type=2'b10; Shift_Amt=5'b00000; out_to_file; #10; Shift_Amt=5'b00001; out_to_file; #10; Shift_Amt=5'b00010; out_to_file; #10; Shift_Amt=5'b00011; out_to_file; #10; Shift_Amt=5'b00100; out_to_file; #10; Shift_Amt=5'b00101; out_to_file; #10; Input_Bus[31:0]=32'b00000000000000000000000000000000; Shift_Amt=5'b00000; out_to_file; #10; //Rotate Right Input_Bus[31:0]=32'b00000000000000000000000000000010; Enable=1; Shift_Type=2'b11; Cin=1'b1; Shift_Amt=5'b00000; out_to_file; #10; Shift_Amt=5'b00001; out_to_file; #10; Shift_Amt=5'b00010; out_to_file; #10; Shift_Amt=5'b00011; out_to_file; #10; Shift_Amt=5'b00100; out_to_file; #10; Shift_Amt=5'b00101; out_to_file; #10; $fdisplay (file,"%d tests run", num_tests); $fdisplay (file,"--Tests Completed--"); //signal end of tests $finish; $fclose (file); end task out_to_file; begin #1; num_tests = num_tests + 1; $fdisplay (file, "Input_Bus=%h Shift_Type=%b Shift_Amt=%h Cin=%b Enable=%b Output_Bus=%h Cout=%b", Input_Bus, Shift_Type, Shift_Amt, Cin, Enable, Output_Bus, Cout); $fdisplay(file,"================"); end endtaskendmodule ?? 快捷鍵說明
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