verilator/test_regress/t/t_foreach.v

// DESCRIPTION: Verilator: Verilog Test module
//
// This file ONLY is placed into the Public Domain, for any use,
// without warranty, 2016 by Wilson Snyder.

`define checkh(gotv,expv) do if ((gotv) !== (expv)) begin $write("%%Error: %s:%0d:  got='h%x exp='h%x\n", `__FILE__,`__LINE__, (gotv), (expv)); $stop; end while(0);

module t (/*AUTOARG*/);

   // verilator lint_off LITENDIAN
   // verilator lint_off WIDTH

   reg [63:0] sum;
   reg [2:1] [4:3] array [5:6] [7:8];
   reg [1:2] [3:4] larray [6:5] [8:7];
   bit [31:0]      depth1_array [0:0];

   function [63:0] crc (input [63:0] sum, input [31:0] a, input [31:0] b, input [31:0] c, input [31:0] d);
      crc = {sum[62:0],sum[63]} ^ {4'b0,a[7:0], 4'h0,b[7:0], 4'h0,c[7:0], 4'h0,d[7:0]};
   endfunction

   initial begin
      sum = 0;
      // We use 'index_' as the prefix for all loop vars,
      // this allows t_foreach.pl to confirm that all loops
      // have been unrolled and flattened away and no loop vars
      // remain in the generated .cpp
      foreach (depth1_array[index_a]) begin
         sum = crc(sum, index_a, 0, 0, 0);

         // Ensure the index never goes out of bounds.
         // We used to get this wrong for an array of depth 1.
         assert (index_a != -1);
         assert (index_a != 1);
      end
      `checkh(sum, 64'h0);

      sum = 0;
      foreach (array[index_a]) begin
         sum = crc(sum, index_a, 0, 0, 0);
      end
      `checkh(sum, 64'h000000c000000000);

      sum = 0;
      foreach (array[index_a,index_b]) begin
         sum = crc(sum, index_a, index_b, 0, 0);
      end
      `checkh(sum, 64'h000003601e000000);

      sum = 0;
      foreach (array[index_a,index_b,index_c]) begin
         sum = crc(sum, index_a, index_b, index_c, 0);
      end
      `checkh(sum, 64'h00003123fc101000);

      sum = 0;
      foreach (array[index_a,index_b,index_c,index_d]) begin
         sum = crc(sum, index_a, index_b, index_c, index_d);
      end
      `checkh(sum, 64'h0030128ab2a8e557);

      //

      sum = 0;
      foreach (larray[index_a]) begin
         sum = crc(sum, index_a, 0, 0, 0);
      end
      `checkh(sum, 64'h0000009000000000);

      sum = 0;
      foreach (larray[index_a,index_b]) begin
         sum = crc(sum, index_a, index_b, 0, 0);
         sum = sum + {4'b0,index_a[7:0], 4'h0,index_b[7:0]};
      end
      `checkh(sum, 64'h000002704b057073);

      sum = 0;
      foreach (larray[index_a,index_b,index_c]) begin
         sum = crc(sum, index_a, index_b, index_c, 0);
      end
      `checkh(sum, 64'h00002136f9000000);

      sum = 0;
      foreach (larray[index_a,index_b,index_c,index_d]) begin
         sum = crc(sum, index_a, index_b, index_c, index_d);
      end
      `checkh(sum, 64'h0020179aa7aa0aaa);

      $write("*-* All Finished *-*\n");
      $finish;
   end
endmodule