| 1 | // ========== Copyright Header Begin ========================================== |
| 2 | // |
| 3 | // OpenSPARC T2 Processor File: niu_txc_ecc_syndrome.v |
| 4 | // Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved |
| 5 | // 4150 Network Circle, Santa Clara, California 95054, U.S.A. |
| 6 | // |
| 7 | // * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 8 | // |
| 9 | // This program is free software; you can redistribute it and/or modify |
| 10 | // it under the terms of the GNU General Public License as published by |
| 11 | // the Free Software Foundation; version 2 of the License. |
| 12 | // |
| 13 | // This program is distributed in the hope that it will be useful, |
| 14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | // GNU General Public License for more details. |
| 17 | // |
| 18 | // You should have received a copy of the GNU General Public License |
| 19 | // along with this program; if not, write to the Free Software |
| 20 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | // |
| 22 | // For the avoidance of doubt, and except that if any non-GPL license |
| 23 | // choice is available it will apply instead, Sun elects to use only |
| 24 | // the General Public License version 2 (GPLv2) at this time for any |
| 25 | // software where a choice of GPL license versions is made |
| 26 | // available with the language indicating that GPLv2 or any later version |
| 27 | // may be used, or where a choice of which version of the GPL is applied is |
| 28 | // otherwise unspecified. |
| 29 | // |
| 30 | // Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 31 | // CA 95054 USA or visit www.sun.com if you need additional information or |
| 32 | // have any questions. |
| 33 | // |
| 34 | // ========== Copyright Header End ============================================ |
| 35 | `timescale 1ns/1ns |
| 36 | // **************************************************************************** |
| 37 | // Copyright (c) 2001 by Sun Microsystems Inc. |
| 38 | // |
| 39 | // All rights reserved. No part of this design may be reproduced stored |
| 40 | // in a retrieval system, or transmitted, in any form or by any means, |
| 41 | // electronic, mechanical, photocopying, recording, or otherwise, without |
| 42 | // prior written permission of Sun Microsystems, Inc. |
| 43 | // |
| 44 | // Sun Proprietary/Confidential |
| 45 | // |
| 46 | // **************************************************************************** |
| 47 | // File Name : ecc_syndrome.sv |
| 48 | // Version : /main/1 |
| 49 | // Last Update : 10/27/05 16:26:13 rp144381 |
| 50 | // **************************************************************************** |
| 51 | // Module : ecc_syndrome |
| 52 | // Description : Syndrome Generation for SEC-DED code |
| 53 | // For SEC and SEC-DED implementations, din[75:0] refers to |
| 54 | // {data bits[67:0], check bits[7:0]}. |
| 55 | // For Hamming implementation, the check bits are distributed |
| 56 | // among the data bits. Refer to the generated parity check |
| 57 | // matrix for details. |
| 58 | // Order of bits in din[75:0] has to be the same as |
| 59 | // dout[75:0] of the ecc_generate module. |
| 60 | // This module is used while reading data |
| 61 | // *************************************************************************** |
| 62 | // Revision History |
| 63 | // Date Author Description |
| 64 | // 10/27/05 rp144381 Initial verilog generated from ECC automation script |
| 65 | // **************************************************************************** |
| 66 | |
| 67 | module niu_txc_ecc_syndrome (din, syn); |
| 68 | |
| 69 | input [75:0] din; |
| 70 | output [7:0] syn; |
| 71 | |
| 72 | assign syn[7] = din[73] ^ din[70] ^ din[68] ^ din[65] ^ din[63] ^ din[60] ^ din[57] ^ din[54] ^ din[51] ^ din[49] ^ din[47] ^ din[43] ^ din[41] ^ din[39] ^ din[35] ^ din[34] ^ din[30] ^ din[27] ^ din[26] ^ din[22] ^ din[21] ^ din[18] ^ din[16] ^ din[15] ^ din[13] ^ din[12] ^ din[10] ^ din[9] ^ din[7]; |
| 73 | assign syn[6] = din[73] ^ din[71] ^ din[68] ^ din[65] ^ din[62] ^ din[60] ^ din[58] ^ din[55] ^ din[52] ^ din[50] ^ din[46] ^ din[44] ^ din[42] ^ din[38] ^ din[36] ^ din[33] ^ din[30] ^ din[29] ^ din[25] ^ din[22] ^ din[20] ^ din[18] ^ din[17] ^ din[15] ^ din[13] ^ din[12] ^ din[10] ^ din[8] ^ din[6]; |
| 74 | assign syn[5] = din[74] ^ din[71] ^ din[68] ^ din[66] ^ din[63] ^ din[61] ^ din[57] ^ din[55] ^ din[52] ^ din[49] ^ din[47] ^ din[45] ^ din[41] ^ din[40] ^ din[37] ^ din[33] ^ din[32] ^ din[28] ^ din[25] ^ din[24] ^ din[23] ^ din[18] ^ din[17] ^ din[15] ^ din[14] ^ din[12] ^ din[11] ^ din[9] ^ din[5]; |
| 75 | assign syn[4] = din[74] ^ din[71] ^ din[69] ^ din[66] ^ din[63] ^ din[60] ^ din[59] ^ din[56] ^ din[53] ^ din[50] ^ din[48] ^ din[44] ^ din[42] ^ din[39] ^ din[36] ^ din[34] ^ din[31] ^ din[28] ^ din[27] ^ din[23] ^ din[21] ^ din[19] ^ din[17] ^ din[15] ^ din[14] ^ din[12] ^ din[10] ^ din[9] ^ din[4]; |
| 76 | assign syn[3] = din[74] ^ din[72] ^ din[69] ^ din[67] ^ din[64] ^ din[61] ^ din[58] ^ din[55] ^ din[53] ^ din[50] ^ din[47] ^ din[45] ^ din[43] ^ din[39] ^ din[38] ^ din[35] ^ din[31] ^ din[29] ^ din[26] ^ din[24] ^ din[22] ^ din[19] ^ din[17] ^ din[16] ^ din[14] ^ din[12] ^ din[11] ^ din[9] ^ din[8] ^ din[3]; |
| 77 | assign syn[2] = din[75] ^ din[72] ^ din[69] ^ din[66] ^ din[64] ^ din[61] ^ din[58] ^ din[56] ^ din[54] ^ din[51] ^ din[48] ^ din[46] ^ din[42] ^ din[41] ^ din[37] ^ din[34] ^ din[32] ^ din[30] ^ din[26] ^ din[25] ^ din[20] ^ din[19] ^ din[17] ^ din[16] ^ din[14] ^ din[13] ^ din[11] ^ din[9] ^ din[8] ^ din[2]; |
| 78 | assign syn[1] = din[75] ^ din[72] ^ din[70] ^ din[67] ^ din[65] ^ din[62] ^ din[59] ^ din[56] ^ din[53] ^ din[51] ^ din[49] ^ din[45] ^ din[43] ^ din[40] ^ din[37] ^ din[36] ^ din[33] ^ din[29] ^ din[27] ^ din[23] ^ din[20] ^ din[19] ^ din[18] ^ din[16] ^ din[14] ^ din[13] ^ din[11] ^ din[10] ^ din[8] ^ din[1]; |
| 79 | assign syn[0] = din[75] ^ din[73] ^ din[70] ^ din[67] ^ din[64] ^ din[62] ^ din[59] ^ din[57] ^ din[54] ^ din[52] ^ din[48] ^ din[46] ^ din[44] ^ din[40] ^ din[38] ^ din[35] ^ din[32] ^ din[31] ^ din[28] ^ din[24] ^ din[21] ^ din[19] ^ din[18] ^ din[16] ^ din[15] ^ din[13] ^ din[11] ^ din[10] ^ din[8] ^ din[0]; |
| 80 | endmodule |