pi controller i verilog

[Altera_Forum]

i used matlab hdl coder to design the pi controller. but when I use it an error occurs  

it shows $bitstoreal is not supported 2 real value is not supported. any help  thanku   // ------------------------------------------------------------- //  // File Name: hdlsrc\untitled\PI_Controller.v // Created: 2018-02-27 12:02:47 //  // Generated by MATLAB 9.0 and HDL Coder 3.8 //  // -------------------------------------------------------------     // ------------------------------------------------------------- //  // Module: PI_Controller // Source Path: untitled/PI Controller // Hierarchy Level: 1 //  // -------------------------------------------------------------   `timescale 1 ns / 1 ns   module PI_Controller  (  clk,  reset,  enb,  u,  y  );      input clk;  input reset;  input enb;  input [63:0] u; // double  output [63:0] y; // double      real u_double; // double  real Proportional_Gain_out1; // double  real Integral_Gain_out1; // double  real Integrator_x_reg; // double  real Integrator_u_add; // double  real Sum_out1; // double      always @* u_double = $bitstoreal(u);    always @* Proportional_Gain_out1 = 0.0349 * u_double;        always @* Integral_Gain_out1 = 2.0 * u_double;        always @* Integrator_u_add = Integrator_x_reg + Integral_Gain_out1;        always @(posedge clk or posedge reset)  begin : Integrator_reg_process  if (reset == 1'b1) begin  Integrator_x_reg <= 0.0;  end  else begin  if (enb) begin  Integrator_x_reg <= Integrator_u_add;  end  end  end        always @* Sum_out1 = Proportional_Gain_out1 + Integrator_x_reg;        assign y = $realtobits(Sum_out1);   endmodule // PI_Controller

[Altera_Forum]

The model below is not synthesizable.  

 $real is not supported in synthesis.   Additionally, most of the logic is not synchronous. Perhaps the HDL compiler from MathWorks is only generating a simulation model, not a synthesizable one.   -James     --- Quote Start ---  i used matlab hdl coder to design the pi controller. but when I use it an error occurs  it shows $bitstoreal is not supported 2 real value is not supported. any help  thanku   // ------------------------------------------------------------- //  // File Name: hdlsrc\untitled\PI_Controller.v // Created: 2018-02-27 12:02:47 //  // Generated by MATLAB 9.0 and HDL Coder 3.8 //  // -------------------------------------------------------------     // ------------------------------------------------------------- //  // Module: PI_Controller // Source Path: untitled/PI Controller // Hierarchy Level: 1 //  // -------------------------------------------------------------   `timescale 1 ns / 1 ns   module PI_Controller  (  clk,  reset,  enb,  u,  y  );      input clk;  input reset;  input enb;  input [63:0] u; // double  output [63:0] y; // double      real u_double; // double  real Proportional_Gain_out1; // double  real Integral_Gain_out1; // double  real Integrator_x_reg; // double  real Integrator_u_add; // double  real Sum_out1; // double      always @* u_double = $bitstoreal(u);    always @* Proportional_Gain_out1 = 0.0349 * u_double;        always @* Integral_Gain_out1 = 2.0 * u_double;        always @* Integrator_u_add = Integrator_x_reg + Integral_Gain_out1;        always @(posedge clk or posedge reset)  begin : Integrator_reg_process  if (reset == 1'b1) begin  Integrator_x_reg <= 0.0;  end  else begin  if (enb) begin  Integrator_x_reg <= Integrator_u_add;  end  end  end        always @* Sum_out1 = Proportional_Gain_out1 + Integrator_x_reg;        assign y = $realtobits(Sum_out1);   endmodule // PI_Controller  --- Quote End ---