写一个Verilog 归并排序算法
时间: 2023-11-30 10:55:12 浏览: 29
以下是一个简单的Verilog归并排序算法:
```
module merge_sort(
input clk,
input [7:0] data_in,
input start,
input [7:0] array_size,
output reg [7:0] data_out,
output finish
);
reg [7:0] array[0:255];
reg [7:0] temp[0:255];
reg [7:0] size;
reg [7:0] i, j, k, l;
reg [7:0] cnt;
reg [1:0] mode;
wire [7:0] mid;
wire [7:0] high;
wire [7:0] low;
wire [7:0] sub_array_size;
//计算中间值
assign mid = (size - 1) / 2;
//计算高位和低位
assign high = mid + 1;
assign low = mid;
//计算子数组大小
assign sub_array_size = array_size / 2;
always @(posedge clk) begin
if (start) begin
//初始化,将输入数据存入数组中
for (i = 0; i < array_size; i = i + 1) begin
array[i] = data_in;
end
size = array_size;
cnt = 1;
mode = 0;
end else begin
case (mode)
0: begin
//归并排序
if (cnt == size) begin
mode = 1;
cnt = 1;
size = size / 2;
end else begin
i = cnt;
j = cnt + size - 1;
k = cnt;
while (i <= mid && j <= high) begin
if (array[i] < array[j]) begin
temp[k] = array[i];
i = i + 1;
end else begin
temp[k] = array[j];
j = j + 1;
end
k = k + 1;
end
while (i <= mid) begin
temp[k] = array[i];
i = i + 1;
k = k + 1;
end
while (j <= high) begin
temp[k] = array[j];
j = j + 1;
k = k + 1;
end
for (l = cnt; l < k; l = l + 1) begin
array[l] = temp[l];
end
cnt = cnt + size*2;
end
end
1: begin
//输出排序结果
data_out = array[0];
if (sub_array_size == 1) begin
mode = 2;
finish = 1;
end else begin
cnt = 1;
size = sub_array_size;
mode = 0;
end
end
default: begin
finish = 0;
end
endcase
end
end
endmodule
```