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/*

 Asynchronous SDM NoC

 (C)2011 Wei Song

 Advanced Processor Technologies Group

 Computer Science, the Univ. of Manchester, UK

 Authors:

 Wei Song     wsong83@gmail.com

 License: LGPL 3.0 or later

 Demux for a VC buffer stage.

 History:

 31/03/2010  Initial version. <wsong83@gmail.com>

 02/06/2011  Clean up for opensource. <wsong83@gmail.com>

 09/06/2011  Make sure the sel pin is considered in the ack process. <wsong83@gmail.com>

*/

module vcdmux ( /*AUTOARG*/

   // Outputs

   dia, do0, do1, do2, do3, dot,

   // Inputs

   di0, di1, di2, di3, dit, divc, doa

   );

   parameter VCN = 2;           // number of output VCs

   parameter DW = 32;           // data width of the input

   parameter SCN = DW/2;

   input [SCN-1:0]  di0, di1, di2, di3;

   input [2:0]       dit;

   input [VCN-1:0]  divc;

   output           dia;

   output [VCN-1:0][SCN-1:0] do0, do1, do2, do3;

   output [VCN-1:0][2:0]     dot;

   input  [VCN-1:0]           doa;

   genvar                     i,j;

   /*

   generate

      for (i=0; i<VCN; i++) begin: VCD

         for(j=0; j<SCN; j++) begin: D

            c2 C0 (.a0(di0[j]), .a1(divc[i]), .q(do0[i][j]));

            c2 C1 (.a0(di1[j]), .a1(divc[i]), .q(do1[i][j]));

            c2 C2 (.a0(di2[j]), .a1(divc[i]), .q(do2[i][j]));

            c2 C3 (.a0(di3[j]), .a1(divc[i]), .q(do3[i][j]));

         end

         for(j=0; j<3; j++) begin: T

            c2 C0 (.a0(dit[j]), .a1(divc[i]), .q(dot[i][j]));

         end

      end

   endgenerate

    */

   generate

      for (i=0; i<VCN; i++) begin: VCD

         assign do0[i] = divc[i] ? di0 : 0;

         assign do1[i] = divc[i] ? di1 : 0;

         assign do2[i] = divc[i] ? di2 : 0;

         assign do3[i] = divc[i] ? di3 : 0;

         assign dot[i] = divc[i] ? dit : 0;

      end

   endgenerate

   //assign dia = |doa;

   c2 CACK (.a0(|doa), .a1(|divc), .q(dia));

endmodule // vcdmux