../src/lowrisc_prim_secded_0.1/rtl/prim_secded_72_64_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_72_64_dec (
8: input [71:0] in,
9: output logic [63:0] d_o,
10: output logic [7:0] 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[64] ^ in[0] ^ in[1] ^ in[2] ^ in[3] ^ in[4] ^ in[5] ^ in[6] ^ in[7]
18: ^ in[8] ^ in[9] ^ in[10] ^ in[11] ^ in[12] ^ in[13] ^ in[14] ^ in[15]
19: ^ in[16] ^ in[17] ^ in[18] ^ in[19] ^ in[20] ^ in[57] ^ in[58] ^ in[61]
20: ^ in[62] ^ in[63];
21: assign syndrome_o[1] = in[65] ^ in[0] ^ in[1] ^ in[2] ^ in[3] ^ in[4] ^ in[5] ^ in[21] ^ in[22]
22: ^ in[23] ^ in[24] ^ in[25] ^ in[26] ^ in[27] ^ in[28] ^ in[29] ^ in[30]
23: ^ in[31] ^ in[32] ^ in[33] ^ in[34] ^ in[35] ^ in[58] ^ in[59] ^ in[60]
24: ^ in[62] ^ in[63];
25: assign syndrome_o[2] = in[66] ^ in[0] ^ in[6] ^ in[7] ^ in[8] ^ in[9] ^ in[10] ^ in[21] ^ in[22]
26: ^ in[23] ^ in[24] ^ in[25] ^ in[36] ^ in[37] ^ in[38] ^ in[39] ^ in[40]
27: ^ in[41] ^ in[42] ^ in[43] ^ in[44] ^ in[45] ^ in[56] ^ in[57] ^ in[59]
28: ^ in[60] ^ in[63];
29: assign syndrome_o[3] = in[67] ^ in[1] ^ in[6] ^ in[11] ^ in[12] ^ in[13] ^ in[14] ^ in[21]
30: ^ in[26] ^ in[27] ^ in[28] ^ in[29] ^ in[36] ^ in[37] ^ in[38] ^ in[39]
31: ^ in[46] ^ in[47] ^ in[48] ^ in[49] ^ in[50] ^ in[51] ^ in[56] ^ in[57]
32: ^ in[58] ^ in[61] ^ in[63];
33: assign syndrome_o[4] = in[68] ^ in[2] ^ in[7] ^ in[11] ^ in[15] ^ in[16] ^ in[17] ^ in[22]
34: ^ in[26] ^ in[30] ^ in[31] ^ in[32] ^ in[36] ^ in[40] ^ in[41] ^ in[42]
35: ^ in[46] ^ in[47] ^ in[48] ^ in[52] ^ in[53] ^ in[54] ^ in[56] ^ in[58]
36: ^ in[59] ^ in[61] ^ in[62];
37: assign syndrome_o[5] = in[69] ^ in[3] ^ in[8] ^ in[12] ^ in[15] ^ in[18] ^ in[19] ^ in[23]
38: ^ in[27] ^ in[30] ^ in[33] ^ in[34] ^ in[37] ^ in[40] ^ in[43] ^ in[44]
39: ^ in[46] ^ in[49] ^ in[50] ^ in[52] ^ in[53] ^ in[55] ^ in[56] ^ in[57]
40: ^ in[59] ^ in[60] ^ in[61];
41: assign syndrome_o[6] = in[70] ^ in[4] ^ in[9] ^ in[13] ^ in[16] ^ in[18] ^ in[20] ^ in[24]
42: ^ in[28] ^ in[31] ^ in[33] ^ in[35] ^ in[38] ^ in[41] ^ in[43] ^ in[45]
43: ^ in[47] ^ in[49] ^ in[51] ^ in[52] ^ in[54] ^ in[55] ^ in[56] ^ in[59]
44: ^ in[60] ^ in[61] ^ in[62];
45: assign syndrome_o[7] = in[71] ^ in[5] ^ in[10] ^ in[14] ^ in[17] ^ in[19] ^ in[20] ^ in[25]
46: ^ in[29] ^ in[32] ^ in[34] ^ in[35] ^ in[39] ^ in[42] ^ in[44] ^ in[45]
47: ^ in[48] ^ in[50] ^ in[51] ^ in[53] ^ in[54] ^ in[55] ^ in[57] ^ in[58]
48: ^ in[60] ^ in[62] ^ in[63];
49:
50: // Corrected output calculation
51: assign d_o[0] = (syndrome_o == 8'h7) ^ in[0];
52: assign d_o[1] = (syndrome_o == 8'hb) ^ in[1];
53: assign d_o[2] = (syndrome_o == 8'h13) ^ in[2];
54: assign d_o[3] = (syndrome_o == 8'h23) ^ in[3];
55: assign d_o[4] = (syndrome_o == 8'h43) ^ in[4];
56: assign d_o[5] = (syndrome_o == 8'h83) ^ in[5];
57: assign d_o[6] = (syndrome_o == 8'hd) ^ in[6];
58: assign d_o[7] = (syndrome_o == 8'h15) ^ in[7];
59: assign d_o[8] = (syndrome_o == 8'h25) ^ in[8];
60: assign d_o[9] = (syndrome_o == 8'h45) ^ in[9];
61: assign d_o[10] = (syndrome_o == 8'h85) ^ in[10];
62: assign d_o[11] = (syndrome_o == 8'h19) ^ in[11];
63: assign d_o[12] = (syndrome_o == 8'h29) ^ in[12];
64: assign d_o[13] = (syndrome_o == 8'h49) ^ in[13];
65: assign d_o[14] = (syndrome_o == 8'h89) ^ in[14];
66: assign d_o[15] = (syndrome_o == 8'h31) ^ in[15];
67: assign d_o[16] = (syndrome_o == 8'h51) ^ in[16];
68: assign d_o[17] = (syndrome_o == 8'h91) ^ in[17];
69: assign d_o[18] = (syndrome_o == 8'h61) ^ in[18];
70: assign d_o[19] = (syndrome_o == 8'ha1) ^ in[19];
71: assign d_o[20] = (syndrome_o == 8'hc1) ^ in[20];
72: assign d_o[21] = (syndrome_o == 8'he) ^ in[21];
73: assign d_o[22] = (syndrome_o == 8'h16) ^ in[22];
74: assign d_o[23] = (syndrome_o == 8'h26) ^ in[23];
75: assign d_o[24] = (syndrome_o == 8'h46) ^ in[24];
76: assign d_o[25] = (syndrome_o == 8'h86) ^ in[25];
77: assign d_o[26] = (syndrome_o == 8'h1a) ^ in[26];
78: assign d_o[27] = (syndrome_o == 8'h2a) ^ in[27];
79: assign d_o[28] = (syndrome_o == 8'h4a) ^ in[28];
80: assign d_o[29] = (syndrome_o == 8'h8a) ^ in[29];
81: assign d_o[30] = (syndrome_o == 8'h32) ^ in[30];
82: assign d_o[31] = (syndrome_o == 8'h52) ^ in[31];
83: assign d_o[32] = (syndrome_o == 8'h92) ^ in[32];
84: assign d_o[33] = (syndrome_o == 8'h62) ^ in[33];
85: assign d_o[34] = (syndrome_o == 8'ha2) ^ in[34];
86: assign d_o[35] = (syndrome_o == 8'hc2) ^ in[35];
87: assign d_o[36] = (syndrome_o == 8'h1c) ^ in[36];
88: assign d_o[37] = (syndrome_o == 8'h2c) ^ in[37];
89: assign d_o[38] = (syndrome_o == 8'h4c) ^ in[38];
90: assign d_o[39] = (syndrome_o == 8'h8c) ^ in[39];
91: assign d_o[40] = (syndrome_o == 8'h34) ^ in[40];
92: assign d_o[41] = (syndrome_o == 8'h54) ^ in[41];
93: assign d_o[42] = (syndrome_o == 8'h94) ^ in[42];
94: assign d_o[43] = (syndrome_o == 8'h64) ^ in[43];
95: assign d_o[44] = (syndrome_o == 8'ha4) ^ in[44];
96: assign d_o[45] = (syndrome_o == 8'hc4) ^ in[45];
97: assign d_o[46] = (syndrome_o == 8'h38) ^ in[46];
98: assign d_o[47] = (syndrome_o == 8'h58) ^ in[47];
99: assign d_o[48] = (syndrome_o == 8'h98) ^ in[48];
100: assign d_o[49] = (syndrome_o == 8'h68) ^ in[49];
101: assign d_o[50] = (syndrome_o == 8'ha8) ^ in[50];
102: assign d_o[51] = (syndrome_o == 8'hc8) ^ in[51];
103: assign d_o[52] = (syndrome_o == 8'h70) ^ in[52];
104: assign d_o[53] = (syndrome_o == 8'hb0) ^ in[53];
105: assign d_o[54] = (syndrome_o == 8'hd0) ^ in[54];
106: assign d_o[55] = (syndrome_o == 8'he0) ^ in[55];
107: assign d_o[56] = (syndrome_o == 8'h7c) ^ in[56];
108: assign d_o[57] = (syndrome_o == 8'had) ^ in[57];
109: assign d_o[58] = (syndrome_o == 8'h9b) ^ in[58];
110: assign d_o[59] = (syndrome_o == 8'h76) ^ in[59];
111: assign d_o[60] = (syndrome_o == 8'he6) ^ in[60];
112: assign d_o[61] = (syndrome_o == 8'h79) ^ in[61];
113: assign d_o[62] = (syndrome_o == 8'hd3) ^ in[62];
114: assign d_o[63] = (syndrome_o == 8'h8f) ^ in[63];
115:
116: // err_o calc. bit0: single error, bit1: double error
117: assign single_error = ^syndrome_o;
118: assign err_o[0] = single_error;
119: assign err_o[1] = ~single_error & (|syndrome_o);
120: endmodule
121:
122: