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//
// Copyright 2011 Ettus Research LLC
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
module add_onescomp
#(parameter WIDTH = 16)
(input [WIDTH-1:0] A,
input [WIDTH-1:0] B,
output [WIDTH-1:0] SUM);
wire [WIDTH:0] SUM_INT = {1'b0,A} + {1'b0,B};
assign SUM = SUM_INT[WIDTH-1:0] + {{WIDTH-1{1'b0}},SUM_INT[WIDTH]};
endmodule // add_onescomp
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