Subversion Repositories async_sdm_noc

/*

 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

 Unidirectional crossbar using the XY routing algorithm.

 *** SystemVerilog is used ***

 History:

 09/07/2009  Initial version. <wsong83@gmail.com>

*/

// the router structure definitions

module cb_xy (/*AUTOARG*/

   // Outputs

   so, wo, no, eo, lo,

   // Inputs

   si, wi, ni, ei, li, scfg, ncfg, wcfg, ecfg, lcfg

   ) ;

   parameter DW = 8;            // the wire count of the crossbar

   input [DW-1:0]      si, wi, ni, ei, li; // data input

   output [DW-1:0]     so, wo, no, eo, lo; // data output

   input [1:0]          scfg, ncfg;         // configuration

   input [3:0]          wcfg, ecfg, lcfg;   // configuration

   // ANDed wires

   wire [DW-1:0][1:0]  tos, ton;

   wire [DW-1:0][3:0]  tow, toe, tol;

   // generate

   genvar                     i, j;

   generate for (i=0; i<DW; i=i+1)

     begin:OPA

        and AN2S (tos[i][0], ni[i], scfg[0]);

        and AL2S (tos[i][1], li[i], scfg[1]);

        assign so[i] = |tos[i];

        and AS2W (tow[i][0], si[i], wcfg[0]);

        and AN2W (tow[i][1], ni[i], wcfg[1]);

        and AE2W (tow[i][2], ei[i], wcfg[2]);

        and AL2W (tow[i][3], li[i], wcfg[3]);

        assign wo[i] = |tow[i];

        and AS2N (ton[i][0], si[i], ncfg[0]);

        and AL2N (ton[i][1], li[i], ncfg[1]);

        assign no[i] = |ton[i];

        and AS2E (toe[i][0], si[i], ecfg[0]);

        and AW2E (toe[i][1], wi[i], ecfg[1]);

        and AN2E (toe[i][2], ni[i], ecfg[2]);

        and AL2E (toe[i][3], li[i], ecfg[3]);

        assign eo[i] = |toe[i];

        and AS2L (tol[i][0], si[i], lcfg[0]);

        and AW2L (tol[i][1], wi[i], lcfg[1]);

        and AN2L (tol[i][2], ni[i], lcfg[2]);

        and AE2L (tol[i][3], ei[i], lcfg[3]);

        assign lo[i] = |tol[i];

     end // block: OPA

   endgenerate

endmodule // cb_xy