diff options
Diffstat (limited to 'fpga/usrp2/sdr_lib/round_tb.v')
| -rw-r--r-- | fpga/usrp2/sdr_lib/round_tb.v | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/fpga/usrp2/sdr_lib/round_tb.v b/fpga/usrp2/sdr_lib/round_tb.v deleted file mode 100644 index ddc464f4a..000000000 --- a/fpga/usrp2/sdr_lib/round_tb.v +++ /dev/null @@ -1,61 +0,0 @@ -// -*- 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_tb(); - - localparam IW=8; - localparam OW=4; - localparam EW=IW-OW+1; - - reg signed [IW-1:0] in; - wire signed [OW-1:0] out; - wire signed [EW-1:0] err; - - round #(.bits_in(IW), - .bits_out(OW), - .round_to_zero(0), // original behavior - .round_to_nearest(1), // lowest noise - .trunc(0)) // round to negative infinity - round (.in(in),.out(out),.err(err)); - - initial $dumpfile("round_tb.vcd"); - initial $dumpvars(0,round_tb); - - wire signed [IW-1:0] out_round = {out,{IW-OW{1'b0}}}; - - initial - begin - in <= -129; - #1; - repeat (260) - begin - in <= in + 1; - #1; - $display("In %d, out %d, out_rnd %d, err %d, real err %d",in,out,out_round,-err,out_round-in); - #1; - end - $finish; - end - -endmodule // round |