帮我写一个cordic算法实现开方运算的Verilog代码以及其测试代码

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以下是 Cordic 算法实现开方运算的 Verilog 代码及其测试代码：

module cordic_sqrt ( input signed [31:0] x, output reg signed [15:0] y  );
  localparam ITERATIONS = 16;
  localparam ANGLE_TBL_SIZE = 64;

  reg signed [31:0] angle_table [-ANGLE_TBL_SIZE+1:ANGLE_TBL_SIZE-1];
  reg signed [31:0] x_i, y_i, z_i, d_i;

  // Initialize angle table
  initial begin
    angle_table[0] = 0;
    for (int i = 1; i <= ANGLE_TBL_SIZE-1; i++) begin
      angle_table[i] = angle_table[i-1] + {32'd0, (1<<(31-i+1))};
    end
    for (int i = -1; i >= -ANGLE_TBL_SIZE+1; i--) begin
      angle_table[i] = angle_table[i+1] - {32'd0, (1<<(31+i+1))};
    end
  end

  // CORDIC algorithm
  always @(*) begin
    x_i <= x >> ITERATIONS;
    y_i <= 0;
    z_i <= 0;
    d_i <= 1 << 30;

    for (int i = 0; i < ITERATIONS; i++) begin
      if (x_i > 0) begin
        y_i <= y_i + (d_i << ~i);
        z_i <= z_i + angle_table[i];
        x_i <= x_i - (y_i >> ~i);
      end else begin
        y_i <= y_i - (d_i << ~i);
        z_i <= z_i - angle_table[i];
        x_i <= x_i + (y_i >> ~i);
      end
    end

    // Rounding
    if (x_i > 0) begin
      y <= y_i + (1 << 14);
    end else begin
      y <= y_i;
    end
  end
endmodule

module tb_cordic_sqrt;
  reg signed [31:0] x;
  wire signed [15:0] y;

  cordic_sqrt dut (
    .x(x),
    .y(y)
  );

  initial begin
    x <= 176776;
    #10 $display("sqrt(%d) = %d", x, y);
    $finish;
  end
endmodule

这段代码实现了 Cordic 算法的开方运算，其中 ITERATIONS 参数为计算迭代次数，可以根据精度要求进行调整。测试代码将输入的 176776 开根号后输出，可以根据需要进行修改。