16位输入cordic算法的流水线设计verilog代码与medelsim测试代码

以下是一个基于CORDIC算法的16位流水线设计的Verilog代码和Medelsim测试代码。

Verilog代码：

module cordic(input signed [15:0] x_in,
              input signed [15:0] y_in,
              input signed [15:0] z_in,
              output signed [15:0] x_out,
              output signed [15:0] y_out,
              output signed [15:0] z_out,
              input clk,
              input reset);

    wire signed [15:0] x_s, y_s, z_s;
    reg signed [15:0] x_r, y_r, z_r;

    assign x_out = x_s;
    assign y_out = y_s;
    assign z_out = z_s;

    // Pipeline registers
    reg signed [15:0] x_p1, y_p1, z_p1;
    reg signed [15:0] x_p2, y_p2, z_p2;
    reg signed [15:0] x_p3, y_p3, z_p3;
    reg signed [15:0] x_p4, y_p4, z_p4;

    // CORDIC iterations
    integer i;
    reg signed [15:0] x_i, y_i, z_i;

    // Initial values
    always @(posedge reset) begin
        x_r <= x_in;
        y_r <= y_in;
        z_r <= z_in;
    end

    // Pipeline stages
    always @(posedge clk) begin
        x_i <= x_r >> 1;
        y_i <= y_r >> 1;
        z_i <= z_r >> 1;

        x_p1 <= x_i + (y_r >> i);
        y_p1 <= y_i - (x_r >> i);
        z_p1 <= z_i - ($signed((i + 1)'d1) * $atan(2**(-i)));

        x_p2 <= x_p1 + (y_p1 >> (i + 1));
        y_p2 <= y_p1 - (x_p1 >> (i + 1));
        z_p2 <= z_p1 - ($signed((i + 2)'d1) * $atan(2**(-(i + 1))));

        x_p3 <= x_p2 + (y_p2 >> (i + 2));
        y_p3 <= y_p2 - (x_p2 >> (i + 2));
        z_p3 <= z_p2 - ($signed((i + 3)'d1) * $atan(2**(-(i + 2))));

        x_p4 <= x_p3 + (y_p3 >> (i + 3));
        y_p4 <= y_p3 - (x_p3 >> (i + 3));
        z_p4 <= z_p3 - ($signed((i + 4)'d1) * $atan(2**(-(i + 3))));

        // Update pipeline registers
        x_r <= x_p4;
        y_r <= y_p4;
        z_r <= z_p4;

        // Update iteration count
        i <= i + 1;
    end

    // Output values
    assign x_s = x_p4;
    assign y_s = y_p4;
    assign z_s = z_p4;

endmodule

Medelsim测试代码：

`timescale 1ns / 1ps

module cordic_tb;

    reg signed [15:0] x_in, y_in, z_in;
    wire signed [15:0] x_out, y_out, z_out;
    reg clk, reset;

    cordic dut(.x_in(x_in), .y_in(y_in), .z_in(z_in), .x_out(x_out), .y_out(y_out), .z_out(z_out), .clk(clk), .reset(reset));

    initial begin
        clk = 0;
        reset = 1;
        x_in = 0;
        y_in = 0;
        z_in = 0;
        #10 reset = 0;
    end

    always #5 clk = ~clk;

    initial begin
        #20 x_in = 32767;
        #20 y_in = 0;
        #20 z_in = 0;
        #100;
        #20 $finish;
    end

endmodule

这个代码可以用于模拟一个CORDIC算法，接收一个16位的输入x、y和z，然后计算它们的三角函数，并将结果输出为16位的x、y和z。测试代码将输入一个x值为32767和y和z值为0的测试向量。