// Copyright 2018 ETH Zurich and University of Bologna. // Copyright and related rights are licensed under the Solderpad Hardware // License, Version 0.51 (the "License"); you may not use this file except in // compliance with the License. You may obtain a copy of the License at // http://solderpad.org/licenses/SHL-0.51. Unless required by applicable law // or agreed to in writing, software, hardware and materials distributed under // this License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR // CONDITIONS OF ANY KIND, either express or implied. See the License for the // specific language governing permissions and limitations under the License. // Franceco Conti <fconti@iis.ee.ethz.ch> module onehot_to_bin #( parameter int unsigned ONEHOT_WIDTH = 16, // Do Not Change parameter int unsigned BIN_WIDTH = ONEHOT_WIDTH == 1 ? 1 : $clog2(ONEHOT_WIDTH) ) ( input logic [ONEHOT_WIDTH-1:0] onehot, output logic [BIN_WIDTH-1:0] bin ); for (genvar j = 0; j < BIN_WIDTH; j++) begin : jl logic [ONEHOT_WIDTH-1:0] tmp_mask; for (genvar i = 0; i < ONEHOT_WIDTH; i++) begin : il logic [BIN_WIDTH-1:0] tmp_i; assign tmp_i = i; assign tmp_mask[i] = tmp_i[j]; end assign bin[j] = |(tmp_mask & onehot); end // pragma translate_off `ifndef VERILATOR assert final ($onehot0(onehot)) else $fatal(1, "[onehot_to_bin] More than two bit set in the one-hot signal"); `endif // pragma translate_on endmodule