CORDIC的Verilog代码

对于CORDIC算法的Verilog代码，这里提供一份基于固定点数的CORDIC代码供参考：

module cordic (
    input signed [15:0] X,   // 输入 X
    input signed [15:0] Y,   // 输入 Y
    input signed [15:0] Z,   // 输入角度 Z，单位为弧度
    output reg signed [15:0] X_out,  // 输出 X
    output reg signed [15:0] Y_out   // 输出 Y
);

    reg signed [15:0] X_i, Y_i, Z_i;
    reg signed [15:0] X_old, Y_old;

    parameter ITER_NUM = 16;  // 迭代次数

    always @(*) begin
        X_i = X;
        Y_i = Y;
        Z_i = Z;
        X_old = 0;
        Y_old = 0;
        for (integer i = 0; i < ITER_NUM; i = i + 1) begin
            if (Z_i > 0) begin
                X_old = X_i;
                Y_old = Y_i;
                X_i = X_old - (Y_old >> i);
                Y_i = Y_old + (X_old >> i);
                Z_i = Z_i - (1 << i);
            end else if (Z_i <= 0) begin
                X_old = X_i;
                Y_old = Y_i;
                X_i = X_old + (Y_old >> i);
                Y_i = Y_old - (X_old >> i);
                Z_i = Z_i + (1 << i);
            end
        end
        X_out = X_i;
        Y_out = Y_i;
    end
endmodule

这里的CORDIC算法是基于向量旋转实现的，通过不断将向量旋转到目标角度来求解正弦和余弦值，具体实现细节可以参考其他CORDIC算法的资料。该代码可以根据具体应用场景进行参数调整，比如迭代次数可以根据精度要求进行调整。