cordic算法verilog实现（简单版）

cordic算法verilog实现（简单版）(转载）module cordic(clk, phi, cos, sin); parameter  W = 13, W_Z = 14; input  clk; input [W_Z-1:0]  phi; output[W-1:0]    cos, sin;   reg [W-1:0]   cos, sin; reg [W-1:0]   x[8:0], y[8:0]; reg [W_Z-1:0] z[7:0]; always @(posedge clk)begin x[0] <= 13'h4D;  // 修正CORDIC算法的比例因子，An的倒数 y[0] <= 13'h00;  z[0] <= phi; // 旋转45度 if(z[0][W_Z-1]) begin  x[1] <= x[0] + y[0];  y[1] <= y[0] - x[0];  z[1] <= z[0] + 14'h65; end else begin  x[1] <= x[0] - y[0];  y[1] <= y[0] + x[0];  z[1] <= z[0] - 14'h65; end // 旋转26.57度 if(z[1][W_Z-1])begin  x[2] <= x[1] + {{1{y[1][W-1]}}, y[1][W-1:1]}; y[2] <= y[1] - {{1{x[1][W-1]}}, x[1][W-1:1]}; z[2] <= z[1] + 14'h3B; end else begin  x[2] <= x[1] - {{1{y[1][W-1]}}, y[1][W-1:1]}; y[2] <= y[1] + {{1{x[1][W-1]}}, x[1][W-1:1]}; z[2] <= z[1] - 14'h3B; end // 旋转14.04度 if(z[2][W_Z-1])begin  x[3] <= x[2] + {{2{y[2][W-1]}}, y[2][W-1:2]}; y[3] <= y[2] - {{2{x[2][W-1]}}, x[2][W-1:2]}; z[3] <= z[2] + 14'h1F; end else begin  x[3] <= x[2] - {{2{y[2][W-1]}}, y[2][W-1:2]}; y[3] <= y[2] + {{2{x[2][W-1]}}, x[2][W-1:2]}; z[3] <= z[2] - 14'h1F; end // 旋转7.13度 if(z[3][W_Z-1])begin  x[4] <= x[3] + {{3{y[3][W-1]}}, y[3][W-1:3]}; y[4] <= y[3] - {{3{x[3][W-1]}}, x[3][W-1:3]}; z[4] <= z[3] + 14'h10; end else begin  x[4] <= x[3] - {{3{y[3][W-1]}}, y[3][W-1:3]}; y[4] <= y[3] + {{3{x[3][W-1]}}, x[3][W-1:3]}; z[4] <= z[3] - 14'h10; end // 旋转3.58度 if(z[4][W_Z-1])begin  x[5] <= x[4] + {{4{y[4][W-1]}}, y[4][W-1:4]}; y[5] <= y[4] - {{4{x[4][W-1]}}, x[4][W-1:4]}; z[5] <= z[4] + 14'h8; end else begin  x[5] <= x[4] - {{4{y[4][W-1]}}, y[4][W-1:4]}; y[5] <= y[4] + {{4{x[4][W-1]}}, x[4][W-1:4]}; z[5] <= z[4] - 14'h8; end // 旋转1.79度 if(z[5][W_Z-1])begin  x[6] <= x[5] + {{5{y[5][W-1]}}, y[5][W-1:5]}; y[6] <= y[5] - {{5{x[5][W-1]}}, x[5][W-1:5]}; z[6] <= z[5] + 14'h4; end else begin  x[6] <= x[5] - {{5{y[5][W-1]}}, y[5][W-1:5]}; y[6] <= y[5] + {{5{x[5][W-1]}}, x[5][W-1:5]}; z[6] <= z[5] - 14'h4; end // 旋转0.90度 if(z[6][W_Z-1])begin  x[7] <= x[6] + {{6{y[6][W-1]}}, y[6][W-1:6]}; y[7] <= y[6] - {{6{x[6][W-1]}},x[6][W-1:6]}; z[7] <= z[6] + 14'h2; end else begin  x[7] <= x[6] - {{6{y[6][W-1]}}, y[6][W-1:6]}; y[7] <= y[6] + {{6{x[6][W-1]}}, x[6][W-1:6]}; z[7] <= z[6] - 14'h2; end // 旋转0.45度 if(z[7][W_Z-1])begin  x[8] <= x[7] + {{7{y[7][W-1]}}, y[7][W-1:7]}; y[8] <= y[7] - {{7{x[7][W-1]}}, x[7][W-1:7]}; end else begin  x[8] <= x[7] - {{7{y[7][W-1]}}, y[7][W-1:7]}; y[8] <= y[7] + {{7{x[7][W-1]}}, x[7][W-1:7]}; end cos <= x[8]; sin <= y[8]; endendmodule