[SOLVED] Test bench simulation

hi this is my code im nt getting any output n tell me how to give inputs in the test bench waveform


entity Encrypt is
Port ( rs1 : in STD_LOGIC_VECTOR (15 downto 0);
rs2 : in STD_LOGIC_VECTOR (15 downto 0);
rs3 : in STD_LOGIC_VECTOR (15 downto 0);
rs4 : in STD_LOGIC_VECTOR (15 downto 0);
k1,k2,k3,k4 : in STD_LOGIC_VECTOR (15 downto 0);
pt : in STD_LOGIC_VECTOR (15 downto 0);
LFSR : in STD_LOGIC_VECTOR (15 downto 0);
ct : out STD_LOGIC_VECTOR (15 downto 0));
end Encrypt;

architecture Behavioral of Encrypt is
signal x1,x2,x3,x4,x5 : std_logic_vector(15 downto 0);
signal v12,v23,v34 : std_logic_vector(15 downto 0);
signal rs1_ext : std_logic_vector(15 downto 0);
signal rs2_ext : std_logic_vector(15 downto 0);
signal rs3_ext : std_logic_vector(15 downto 0);
signal rs4_ext : std_logic_vector(15 downto 0);

begin
process(rs1,rs2,rs3,rs4,pt,k1,k2,k3,k4,LFSR)
variable i : integer;

begin
for i in 0 to 3 loop
x1 <= rs1 + pt;
v12 <= x1 xor k1;
x2 <= v12+ rs2_ext;
v23 <= x2 xor k2;
x3 <= v23 + rs3_ext;
v34 <= x3 xor k3;
x4 <= v34 + rs4_ext;
ct <= x4 xor k4;
rs1_ext <= rs1_ext + v34;
x1 <= v23 + LFSR;
rs3_ext <= rs3_ext + x1;
x2 <= v12 + rs1_ext;
rs4_ext <= rs4_ext + x2;
x3 <= v12 + rs4_ext;
rs2_ext <= rs2_ext + x3;
end loop;
end process;
end Behavioral;

plse giv the solution to my problem

u need to write the testbench for this module.

my xilinx 13.2 in win 8 pro is not able to simulate... It shows error: Failed to link the design. What could be the problem??

Are you using ISIM then? I don't use ISIM, but there are other on here who do. You should post the exact message being reported from ISIM to get help.

I'm using ISIM...
ERROR:Simulator:861 - Failed to link the design

Hi Hemanth,

ISE wont support in win8. please read the below thread.
http://forums.xilinx.com/t5/Simulat...tor-861-Failed-to-link-the-design/td-p/261956.