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`include "positConfig.sv"

// ============================================================================

//        __

//   \\__/ o\    (C) 2020  Robert Finch, Waterloo

//    \  __ /    All rights reserved.

//     \/_//     robfinch@finitron.ca

//       ||

//

//      positCntlz.sv

//

// This source file 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 3 of the License, or

// (at your option) any later version.

//

// This source file 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 .

//

// ============================================================================

//

module positCntlz(i, o);

parameter PSTWID = `PSTWID;

input [PSTWID-2:0] i;

output [$clog2(PSTWID-2):0] o;

generate begin : gClz

  case(PSTWID)

  16: cntlz16 u1 (.i({i,1'b1}), .o(o));

  20: cntlz24 u1 (.i({i,1'b1,4'hF}), .o(o));

  32: cntlz32 u1 (.i({i,1'b1}), .o(o));

  40: cntlz48 u1 (.i({i,1'b1,8'hFF}), .o(o));

  52: cntlz64 u1 (.i({i,1'b1,12'hFFF}), .o(o));

  64: cntlz64 u1 (.i({i,1'b1}), .o(o));

  80: cntlz80 u1 (.i({i,1'b1}), .o(o));

  default:  ;

  endcase

end

endgenerate

endmodule