../src/lowrisc_prim_secded_0.1/rtl/prim_secded_28_22_dec.sv Cov: 100%

   1: // Copyright lowRISC contributors.
   2: // Licensed under the Apache License, Version 2.0, see LICENSE for details.
   3: // SPDX-License-Identifier: Apache-2.0
   4: //
   5: // SECDED Decoder generated by secded_gen.py
   6: 
   7: module prim_secded_28_22_dec (
   8:   input        [27:0] in,
   9:   output logic [21:0] d_o,
  10:   output logic [5:0] syndrome_o,
  11:   output logic [1:0] err_o
  12: );
  13: 
  14:   logic single_error;
  15: 
  16:   // Syndrome calculation
  17:   assign syndrome_o[0] = in[22] ^ in[0] ^ in[1] ^ in[2] ^ in[3] ^ in[4] ^ in[5] ^ in[6] ^ in[7]
  18:                        ^ in[8] ^ in[9] ^ in[20] ^ in[21];
  19:   assign syndrome_o[1] = in[23] ^ in[0] ^ in[1] ^ in[2] ^ in[3] ^ in[10] ^ in[11] ^ in[12] ^ in[13]
  20:                        ^ in[14] ^ in[15] ^ in[20] ^ in[21];
  21:   assign syndrome_o[2] = in[24] ^ in[0] ^ in[4] ^ in[5] ^ in[6] ^ in[10] ^ in[11] ^ in[12] ^ in[16]
  22:                        ^ in[17] ^ in[18] ^ in[20];
  23:   assign syndrome_o[3] = in[25] ^ in[1] ^ in[4] ^ in[7] ^ in[8] ^ in[10] ^ in[13] ^ in[14] ^ in[16]
  24:                        ^ in[17] ^ in[19] ^ in[21];
  25:   assign syndrome_o[4] = in[26] ^ in[2] ^ in[5] ^ in[7] ^ in[9] ^ in[11] ^ in[13] ^ in[15] ^ in[16]
  26:                        ^ in[18] ^ in[19] ^ in[20] ^ in[21];
  27:   assign syndrome_o[5] = in[27] ^ in[3] ^ in[6] ^ in[8] ^ in[9] ^ in[12] ^ in[14] ^ in[15] ^ in[17]
  28:                        ^ in[18] ^ in[19] ^ in[20] ^ in[21];
  29: 
  30:   // Corrected output calculation
  31:   assign d_o[0] = (syndrome_o == 6'h7) ^ in[0];
  32:   assign d_o[1] = (syndrome_o == 6'hb) ^ in[1];
  33:   assign d_o[2] = (syndrome_o == 6'h13) ^ in[2];
  34:   assign d_o[3] = (syndrome_o == 6'h23) ^ in[3];
  35:   assign d_o[4] = (syndrome_o == 6'hd) ^ in[4];
  36:   assign d_o[5] = (syndrome_o == 6'h15) ^ in[5];
  37:   assign d_o[6] = (syndrome_o == 6'h25) ^ in[6];
  38:   assign d_o[7] = (syndrome_o == 6'h19) ^ in[7];
  39:   assign d_o[8] = (syndrome_o == 6'h29) ^ in[8];
  40:   assign d_o[9] = (syndrome_o == 6'h31) ^ in[9];
  41:   assign d_o[10] = (syndrome_o == 6'he) ^ in[10];
  42:   assign d_o[11] = (syndrome_o == 6'h16) ^ in[11];
  43:   assign d_o[12] = (syndrome_o == 6'h26) ^ in[12];
  44:   assign d_o[13] = (syndrome_o == 6'h1a) ^ in[13];
  45:   assign d_o[14] = (syndrome_o == 6'h2a) ^ in[14];
  46:   assign d_o[15] = (syndrome_o == 6'h32) ^ in[15];
  47:   assign d_o[16] = (syndrome_o == 6'h1c) ^ in[16];
  48:   assign d_o[17] = (syndrome_o == 6'h2c) ^ in[17];
  49:   assign d_o[18] = (syndrome_o == 6'h34) ^ in[18];
  50:   assign d_o[19] = (syndrome_o == 6'h38) ^ in[19];
  51:   assign d_o[20] = (syndrome_o == 6'h37) ^ in[20];
  52:   assign d_o[21] = (syndrome_o == 6'h3b) ^ in[21];
  53: 
  54:   // err_o calc. bit0: single error, bit1: double error
  55:   assign single_error = ^syndrome_o;
  56:   assign err_o[0] =  single_error;
  57:   assign err_o[1] = ~single_error & (|syndrome_o);
  58: endmodule
  59: 
  60: