Subversion Repositories robust_fir

<##//////////////////////////////////////////////////////////////////
////                                                             ////
////  Author: Eyal Hochberg                                      ////
////          eyal@provartec.com                                 ////
////                                                             ////
////  Downloaded from: http://www.opencores.org                  ////
/////////////////////////////////////////////////////////////////////
////                                                             ////
//// Copyright (C) 2010 Provartec LTD                            ////
//// www.provartec.com                                           ////
//// info@provartec.com                                          ////
////                                                             ////
//// This source file may be used and distributed without        ////
//// restriction provided that this copyright statement is not   ////
//// removed from the file and that any derivative work contains ////
//// the original copyright notice and the associated disclaimer.////
////                                                             ////
//// This source file is free software; you can redistribute it  ////
//// and/or modify it under the terms of the GNU Lesser General  ////
//// Public License as published by the Free Software Foundation.////
////                                                             ////
//// This source is distributed in the hope that it will be      ////
//// useful, but WITHOUT ANY WARRANTY; without even the implied  ////
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR     ////
//// PURPOSE.  See the GNU Lesser General Public License for more////
//// details. http://www.gnu.org/licenses/lgpl.html              ////
////                                                             ////
//////////////////////////////////////////////////////////////////##>
 
OUTFILE prgen_bintree_adder_INPUT_NUM.v
 
STARTDEF  
SWAP ADD_STAGES LOG2(INPUT_NUM)
ENDDEF
 
CHECK CONST (INPUT_NUM)
 
ITER TX INPUT_NUM
ITER SX ADD_STAGES
 
module prgen_bintree_adder_INPUT_NUM(PORTS);
 
	parameter BITS = 0;
 
	input  clk;
	input  reset;
	input [BITS-1:0] data_inTX;
	output [BITS-1+ADD_STAGES:0] data_out;
	input valid_in;
	output valid_out;
 
 
	LOOP EX INPUT_NUM EXPR(2^LOG2(INPUT_NUM))
	wire [BITS-1:0] data_inEX = {BITS{1'b0}}; //complete power of 2 input data
	ENDLOOP EX
	STOMP LINE
 
	wire [BITS-1:0] sum_stageADD_STAGES_TX;
 
	LOOP TX EXPR(2^LOG2(INPUT_NUM))
	assign sum_stageADD_STAGES_TX = data_inTX;
	ENDLOOP TX
 
 
LOOP SX ADD_STAGES
  ITER AX EXPR(2^SX)
	reg [BITS-1+EXPR(ADD_STAGES-SX):0] sum_stageSX_AX;
  ENDITER AX
ENDLOOP SX
 
	wire valid_dSX;
	wire valid_dADD_STAGES;
    CREATE prgen_delayN.v DEFCMD(SWAP DELAY 1)
	prgen_delay1 #(1) delay_validSX(clk, reset, valid_dSX, valid_dEXPR(SX+1));
	assign valid_d0 = valid_in;
	assign valid_out = valid_dADD_STAGES;
 
LOOP SX ADD_STAGES
  ITER AX EXPR(2^SX)
	always @(posedge clk or posedge reset)
	  if (reset)
	    begin
	        sum_stageSX_AX <= #FFD {BITS+EXPR(ADD_STAGES-SX){1'b0}};
		end
	  else
	  STOMP NEWLINE
	  if (valid_dEXPR(ADD_STAGES-SX-1))
	    begin
	        sum_stageSX_AX <= #FFD sum_stageEXPR(SX+1)_EXPR(2*AX) + sum_stageEXPR(SX+1)_EXPR(2*AX+1);
		end
  ENDITER AX
 
ENDLOOP SX
 
	assign data_out = sum_stage0_0;
 
endmodule