/******************************************************************************/ 
/*                                                                            */ 
/* Copyright (c) 1999 Sun Microsystems, Inc. All rights reserved.             */ 
/*                                                                            */ 
/* The contents of this file are subject to the current version of the Sun    */ 
/* Community Source License, microSPARCII ("the License"). You may not use    */ 
/* this file except in compliance with the License.  You may obtain a copy    */ 
/* of the License by searching for "Sun Community Source License" on the      */ 
/* World Wide Web at http://www.sun.com. See the License for the rights,      */ 
/* obligations, and limitations governing use of the contents of this file.   */ 
/*                                                                            */ 
/* Sun Microsystems, Inc. has intellectual property rights relating to the    */ 
/* technology embodied in these files. In particular, and without limitation, */ 
/* these intellectual property rights may include one or more U.S. patents,   */ 
/* foreign patents, or pending applications.                                  */ 
/*                                                                            */ 
/* Sun, Sun Microsystems, the Sun logo, all Sun-based trademarks and logos,   */ 
/* Solaris, Java and all Java-based trademarks and logos are trademarks or    */ 
/* registered trademarks of Sun Microsystems, Inc. in the United States and   */ 
/* other countries. microSPARC is a trademark or registered trademark of      */ 
/* SPARC International, Inc. All SPARC trademarks are used under license and  */ 
/* are trademarks or registered trademarks of SPARC International, Inc. in    */ 
/* the United States and other countries. Products bearing SPARC trademarks   */ 
/* are based upon an architecture developed by Sun Microsystems, Inc.         */ 
/*                                                                            */ 
/******************************************************************************/ 
/***************************************************************************
****************************************************************************
***
***  Program File:  @(#)column73.v
***
****************************************************************************
****************************************************************************/

//  @(#)column73.v	1.1  4/8/92
//
// **************************************************************
//  column73 -- 7 to 2 compression for column 73.
// **************************************************************


module column73  (
		    sum,		// compressed sum
		    carry,		// compressed carry
		    cout1,		// non-ripple carry-out
		    cout2,		// ripple carry-out
		    cin1,		// non-ripple carry-in
		    cin2,		// ripple carry-in
		    x,			// multiplicand
		    y			// multiplier
		    );
	//prop CELLCLASS "MODULE"
	//prop GENERATOR "DataPath"
	//prop TERMPLACE "BIT"

    output sum;
	//prop TERMPLACE "BOT"
    output carry;
	//prop TERMPLACE "BOT"
    output [12:10] cout1;
	//prop TERMPLACE "LEFT"
    output [11:10] cout2;
	//prop TERMPLACE "LEFT"
    input  [12:10] cin1;
	//prop TERMPLACE "RIGHT"
    input  [11:9] cin2;
	//prop TERMPLACE "RIGHT"
    input  [6:0] x;
	//prop TERMPLACE "TOP"
    input  [27:21] y;
	//prop TERMPLACE "LEFT"

    wire  [27:21] p;		// partial products
    wire  [12:10] cin1;
    wire  [11:9] cin2;
    wire  [11:10] s;		// internal sum's

    pproduct_4 pG (
	    p[24:21],
	    x[6:3],
	    y[24:21]
	    );
	    //prop TERMPLACE "POS=16"

    add4 aG (
	    s[10],
	    cout2[10],
	    cout1[10],
	    p[21],
	    p[22],
	    p[23],
	    p[24],
	    cin1[10]
	    );
	    //prop TERMPLACE "POS=17"

    pproduct_1 pL (
	    p[25],
	    x[2],
	    y[25]
	    );
	    //prop TERMPLACE "POS=18"

    add4 aL (
	    s[11],
	    cout2[11],
	    cout1[11],
	    p[25],
	    s[10],
	    cin2[9],
	    cin2[10],
	    cin1[11]
	    );
	    //prop TERMPLACE "POS=18"

    pproduct_2 pM (
	    p[27:26],
	    x[1:0],
	    y[27:26]
	    );
	    //prop TERMPLACE "POS=19"

    add4 aM  (
	    sum,
	    carry,
	    cout1[12],
	    p[27],
	    s[11],
	    p[26],
	    cin2[11],
	    cin1[12]
	    );
	    //prop TERMPLACE "POS=19"

endmodule