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

 1-of-4 data comparator

 History:

 11/05/2010  Initial version. <wsong83@gmail.com>

 01/06/2011  Clean up for opensource. <wsong83@gmail.com>

*/

module comp4 (/*AUTOARG*/

   // Outputs

   q,

   // Inputs

   a, b

   );

   input [3:0]   a, b;           // the data inputs to be compared

   output [2:0]  q;              // the comparison result

   // a > b

   assign q[0] = (a[3]&(|b[2:0])) | (a[2]&(|b[1:0])) | (a[1]&(|b[0:0]));

   // a < b

   assign q[1] = (a[2]&(|b[3:3])) | (a[1]&(|b[3:2])) | (a[0]&(|b[3:1]));

   // a = b

   assign q[2] = (a[3]&b[3]) | (a[2]&b[2]) | (a[1]&b[1]) | (a[0]&b[0]);

endmodule // comp4