ccmul.v

在ise下设计的蝶形变换程序

`timescale 1ns / 1ps
//////////////////////////////////////////////////////////////////////////////////
// Company: 
// Engineer: 
// 
// Create Date:    22:35:42 11/21/2006 
// Design Name: 
// Module Name:    ccmul 
// Project Name: 
// Target Devices: 
// Tool versions: 
// Description: 
//
// Dependencies: 
//
// Revision: 
// Revision 0.01 - File Created
// Additional Comments: 
//
//////////////////////////////////////////////////////////////////////////////////
`include "sub1.v" 
`include "mult.v" 
`include "add.v"
`include "sub2.v" 
module ccmul(clk, x_in, y_in, c_in, cps_in, cms_in, r_out, i_out);
	 parameter w2=21,w1=11,w=10;
	 input clk;
    input[w-1:0] x_in,y_in,c_in;
    input [w1-1:0] cps_in,cms_in;
    output[w-1:0] r_out,i_out;
	 reg [w-1:0] r_out,i_out;
    wire [w-1:0] x,y,c;
    wire [w2-1:0] r,i,cmsy,cpsx,xmyc,sum;
    wire [w1-1:0] xmy,cps,cms,sxtx,sxty;
	 assign x=x_in;
	 assign y=y_in;
	 assign c=c_in;
	 assign cps=cps_in;
	 assign cms=cms_in;
	 always@(posedge clk)
	 begin
	 r_out<=r[w2-2:w];
	 i_out<=i[w2-2:w];
	 end
	 assign sxtx={x[w-1],x};
	 assign sxty={y[w-1],y};
	 
sub1 sub_1 (.dataa(sxtx),.datab(sxty),.result(xmy));

mult mult_1 (.dataa(xmy),.datab(c),.result(xmyc));
mult mult_2 (.dataa(cms),.datab(y),.result(cmsy));
mult mult_3 (.dataa(cps),.datab(x),.result(cpsx));
add add_1(.dataa(cmsy),.datab(xmyc),.result(r));
sub2 sub_2(.dataa(cpsx),.datab(xmyc),.result(i));

endmodule