module Divider (
input [3:0] dividend,
input [3:0] divisor,
output [3:0] quotient,
output [3:0] remainder,
output reg done
);
reg [7:0] temp_dividend;
reg [3:0] temp_quotient;
reg [3:0] temp_remainder;
reg [2:0] count;
always @(posedge clk or posedge rst) begin
if (rst) begin
temp_dividend <= 0;
temp_quotient <= 0;
temp_remainder <= 0;
count <= 4'b0;
done <= 0;
end else if (count < 4) begin
temp_dividend <= {temp_remainder, dividend};
temp_remainder <= temp_dividend - (divisor << count);
if (temp_remainder[7] == 0) begin
temp_quotient[count] <= 1;
count <= count + 1;
end else begin
temp_quotient[count] <= 0;
count <= count + 1;
end
end else begin
done <= 1;
end
end
assign quotient = temp_quotient;
assign remainder = temp_remainder;
endmodule
这个例子中使用了一个4位的被除数(dividend)和一个4位的除数(divisor),输出商(quotient)和余数(remainder)。这是一个简单的硬件实现,使用的是顺序逻辑,可以通过时钟(clk)和复位(rst)信号控制。需要注意的是,这只是一个基本示例,对于更大的位宽和更复杂的需求,可能需要更复杂的算法和硬件结构。
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