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<##//////////////////////////////////////////////////////////////////

////                                                             ////

////  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