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diff --git a/fpga/usrp2/sdr_lib/round.v b/fpga/usrp2/sdr_lib/round.v
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-// -*- verilog -*-
-//
-// USRP - Universal Software Radio Peripheral
-//
-// Copyright (C) 2011 Matt Ettus
-//
-// 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 2 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, write to the Free Software
-// Foundation, Inc., 51 Franklin Street, Boston, MA 02110-1301 USA
-//
-
-// Rounding "macro"
-// Keeps the topmost bits, does proper 2s comp round to zero (unbiased truncation)
-
-module round
- #(parameter bits_in=0,
- parameter bits_out=0,
- parameter round_to_zero=0, // original behavior
- parameter round_to_nearest=1, // lowest noise
- parameter trunc=0) // round to negative infinity
- (input [bits_in-1:0] in,
- output [bits_out-1:0] out,
- output [bits_in-bits_out:0] err);
-
- wire round_corr,round_corr_trunc,round_corr_rtz,round_corr_nearest,round_corr_nearest_safe;
-
- assign round_corr_trunc = 0;
- assign round_corr_rtz = (in[bits_in-1] & |in[bits_in-bits_out-1:0]);
- assign round_corr_nearest = in[bits_in-bits_out-1];
-
- generate
- if(bits_in-bits_out > 1)
- assign round_corr_nearest_safe = (~in[bits_in-1] & (&in[bits_in-2:bits_out])) ? 0 :
- round_corr_nearest;
- else
- assign round_corr_nearest_safe = round_corr_nearest;
- endgenerate
-
-
- assign round_corr = round_to_nearest ? round_corr_nearest_safe :
- trunc ? round_corr_trunc :
- round_to_zero ? round_corr_rtz :
- 0; // default to trunc
-
- assign out = in[bits_in-1:bits_in-bits_out] + round_corr;
-
- assign err = in - {out,{(bits_in-bits_out){1'b0}}};
-
-endmodule // round