设计一个带控制端的逻辑运算电路分别完成正整数的平方、立方和阶乘的运算.doc

练****设计一个带控制端的逻辑运算电路,分别完成正整数的平方、立方和阶乘的运算。
//--------------myfunction----------
module myfunction(clk,n,result,reset,sl);
output[6:0] result;
input[2:0] n;
input reset,clk;
input [1:0] sl;
reg[6:0] result;//define input and output
always @(posedge clk)
begin
if(!reset)
result<=0;
else
begin
case(sl)
2'd0: result<=square(n);
2'd1: result<=cubic(n);
2'd2: result<=factorial(n);
endcase
end
end
function[6:0] square;
input [2:0] operand;
begin
square=operand*operand;
end
endfunction
function[6:0] cubic;
input [2:0] operand;
begin
cubic=operand*operand*operand;
end
endfunction
function[6:0] factorial;
input [2:0] operand;
reg [2:0] index;
begin
factorial = 1 ;
for(index = 2; index <= operand; index = index + 1)
factorial = index * factorial;
end
endfunction
endmodule
//--------------testmyfunc----------
`include "./"
`timescale 1ns/100ps
`define clk_c