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1 | // ========== Copyright Header Begin ========================================== |
2 | // | |
3 | // OpenSPARC T2 Processor File: ncu_eccchk16_ctl.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 | module ncu_eccchk16_ctl ( | |
36 | din, | |
37 | ci, | |
38 | ue, | |
39 | ce, | |
40 | dout, | |
41 | co) ; | |
42 | wire [5:0] e; | |
43 | ||
44 | ||
45 | input [15:0] din; | |
46 | input [5:0] ci; | |
47 | ||
48 | output ue; | |
49 | output ce; | |
50 | ||
51 | output [15:0] dout; | |
52 | output [5:0] co; | |
53 | ||
54 | ||
55 | reg ue; | |
56 | reg ce; | |
57 | reg [15:0] dout; | |
58 | reg [5:0] co; | |
59 | ||
60 | ||
61 | assign e[5] = ^{din[15:0],ci[5:0]} ; | |
62 | assign e[4] = ^{din[15:11],ci[4]} ; | |
63 | assign e[3] = ^{din[10:4],ci[3]} ; | |
64 | assign e[2] = ^{din[15:14],din[10:7],din[3:1],ci[2]} ; | |
65 | assign e[1] = ^{din[13:12],din[10:9],din[6:5],din[3:2],din[0],ci[1]} ; | |
66 | assign e[0] = ^{din[15],din[13],din[11:10],din[8],din[6],din[4:3],din[1:0],ci[0]} ; | |
67 | ||
68 | always@(e or din or ci) begin | |
69 | dout[15:0]=din[15:0]; | |
70 | co[5:0]=ci[5:0]; | |
71 | ue=1'b0; | |
72 | ce=1'b1; | |
73 | case(e[5:0]) | |
74 | {1'b0,5'd0} : begin | |
75 | ue=1'b0; | |
76 | ce=1'b0; | |
77 | dout[15:0]=din[15:0]; | |
78 | co[5:0]=ci[5:0]; | |
79 | end | |
80 | {1'b1,5'd0} : co[5] = ~ci[5]; | |
81 | {1'b1,5'd1} : co[0] = ~ci[0]; | |
82 | {1'b1,5'd2} : co[1] = ~ci[1]; | |
83 | {1'b1,5'd3} : dout[0] = ~din[0]; | |
84 | {1'b1,5'd4} : co[2] = ~ci[2]; | |
85 | {1'b1,5'd5} : dout[1] = ~din[1]; | |
86 | {1'b1,5'd6} : dout[2] = ~din[2]; | |
87 | {1'b1,5'd7} : dout[3] = ~din[3]; | |
88 | {1'b1,5'd8} : co[3] = ~ci[3]; | |
89 | {1'b1,5'd9} : dout[4] = ~din[4]; | |
90 | {1'b1,5'd10}: dout[5] = ~din[5]; | |
91 | {1'b1,5'd11}: dout[6] = ~din[6]; | |
92 | {1'b1,5'd12}: dout[7] = ~din[7]; | |
93 | {1'b1,5'd13}: dout[8] = ~din[8]; | |
94 | {1'b1,5'd14}: dout[9] = ~din[9]; | |
95 | {1'b1,5'd15}: dout[10] = ~din[10]; | |
96 | {1'b1,5'd16}: co[4] = ~ci[4]; | |
97 | {1'b1,5'd17}: dout[11] = ~din[11]; | |
98 | {1'b1,5'd18}: dout[12] = ~din[12]; | |
99 | {1'b1,5'd19}: dout[13] = ~din[13]; | |
100 | {1'b1,5'd20}: dout[14] = ~din[14]; | |
101 | {1'b1,5'd21}: dout[15] = ~din[15]; | |
102 | default : begin | |
103 | dout[15:0]=din[15:0]; | |
104 | co[5:0]=ci[5:0]; | |
105 | ue=1'b1; | |
106 | ce=1'b0; | |
107 | end | |
108 | endcase | |
109 | end | |
110 | ||
111 | endmodule | |
112 | ||
113 | ||
114 | ||
115 |