帮我写一个cordic算法实现开方运算的Verilog代码
时间: 2024-06-02 15:13:31 浏览: 126
好的,我可以为您编写CORDIC算法实现开方运算的Verilog代码。以下是代码:
module cordic_sqrt(input signed [31:0] x, output reg signed [31:0] y);
parameter IT = 10; //迭代次数
parameter K = 0.6072529350088812561694; //Cordic算法中的K值
reg signed [31:0] angle [0:IT];
wire signed [31:0] x_buf, y_buf;
assign x_buf = (x >= 0) ? x : -x;
assign y_buf = 0;
//初始化角度
initial begin
angle[0] = 0;
for (int i = 1; i <= IT; i = i + 1) begin
angle[i] = $signed($arctan(2 ** (-i)));
if (i > 1) begin
angle[i] = angle[i] + angle[i - 1];
end
end
end
always @(*) begin
//转换x的值
if (x >= 0) begin
angle[0] = 0;
end else begin
angle[0] = $signed(-$arctan($signed(1) / x_buf));
end
//cordic算法迭代
for (int i = 0; i < IT; i = i + 1) begin
if (y_buf >= 0) begin
x_buf = x_buf - (y_buf >> i);
y_buf = y_buf + (x_buf >> i);
angle[i] = angle[i];
end else begin
x_buf = x_buf + (y_buf >> i);
y_buf = y_buf - (x_buf >> i);
angle[i] = angle[i] - $signed(2 ** (-i));
end
end
end
//计算开方
assign y = y_buf * K;
endmodule
请注意,这个代码必须在支持Verilog的开发板或仿真器中运行,并且必须先将x输入到模块中才能输出y。
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