Subversion Repositories sbd_sqrt_fp

/****************************************************************************

sbd_adsu

- ADSU

Copyright (C) 2005 Samuel Brown

sam.brown@sbdesign.org

This library 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; either

version 2.1 of the License, or (at your option) any later version.

This library 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.

You should have received a copy of the GNU Lesser General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

****************************************************************************/

module sbd_adsu(A,B,ADD,C_IN,C_OUT,S);

parameter bitlength=8;

    input [bitlength-1:0] A;

    input [bitlength-1:0] B;

    input ADD;

    input C_IN;

    output wire C_OUT;

    output wire [bitlength-1:0] S;

    wire [bitlength-1:0] Bx;

    wire [bitlength:0] tmp;

    assign Bx = B ^ {bitlength{~ADD}};

    assign tmp = A + Bx + C_IN;

    assign S = tmp[bitlength-1:0];

    assign C_OUT = tmp[bitlength];

endmodule