285 lines
17 KiB
Verilog
285 lines
17 KiB
Verilog
3 years ago
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// © IBM Corp. 2020
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// Licensed under the Apache License, Version 2.0 (the "License"), as modified by
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// the terms below; you may not use the files in this repository except in
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// compliance with the License as modified.
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// You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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//
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// Modified Terms:
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//
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// 1) For the purpose of the patent license granted to you in Section 3 of the
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// License, the "Work" hereby includes implementations of the work of authorship
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// in physical form.
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//
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// 2) Notwithstanding any terms to the contrary in the License, any licenses
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// necessary for implementation of the Work that are available from OpenPOWER
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// via the Power ISA End User License Agreement (EULA) are explicitly excluded
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// hereunder, and may be obtained from OpenPOWER under the terms and conditions
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// of the EULA.
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//
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// Unless required by applicable law or agreed to in writing, the reference design
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License
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// for the specific language governing permissions and limitations under the License.
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//
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// Additional rights, including the ability to physically implement a softcore that
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// is compliant with the required sections of the Power ISA Specification, are
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// available at no cost under the terms of the OpenPOWER Power ISA EULA, which can be
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// obtained (along with the Power ISA) here: https://openpowerfoundation.org.
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`timescale 1 ns / 1 ns
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// Description: XU ECC Check Macro
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//
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//*****************************************************************************
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module tri_eccchk(
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din,
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encorr,
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nsyn,
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corrd,
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sbe,
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ue
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);
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parameter REGSIZE = 64;
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input [0:REGSIZE-1] din;
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input encorr;
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input [0:8-(64/REGSIZE)] nsyn;
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output [0:REGSIZE-1] corrd;
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output sbe;
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output ue;
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generate // syndrome bits inverted
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if (REGSIZE == 64)
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begin : ecc64
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wire [0:7] syn;
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wire [0:71] DcdD; // decode data bits
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wire synzero;
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wire sbe_int;
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wire [0:3] A0to1;
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wire [0:3] A2to3;
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wire [0:3] A4to5;
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wire [0:2] A6to7;
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// ====================================================================
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// 64 Data Bits, 8 Check bits
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// Single bit error correction, Double bit error detection
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// ====================================================================
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// ECC Matrix Description
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// ====================================================================
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// Syn 0 111011010011101001100101101101001100101101001011001101001110100110000000
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// Syn 1 110110101011010101010101011010101010101010101010101010101101010101000000
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// Syn 2 101101100110110011001100110110011001100110011001100110011011001100100000
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// Syn 3 011100011110001111000011110001111000011110000111100001111000111100010000
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// Syn 4 000011111110000000111111110000000111111110000000011111111000000000001000
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// Syn 5 000000000001111111111111110000000000000001111111111111111000000000000100
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// Syn 6 000000000000000000000000001111111111111111111111111111111000000000000010
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// Syn 7 000000000000000000000000000000000000000000000000000000000111111100000001
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assign syn = (~nsyn[0:7]);
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assign A0to1[0] = (~(nsyn[0] & nsyn[1] & encorr));
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assign A0to1[1] = (~(nsyn[0] & syn[1] & encorr));
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assign A0to1[2] = (~( syn[0] & nsyn[1] & encorr));
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assign A0to1[3] = (~( syn[0] & syn[1] & encorr));
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assign A2to3[0] = (~(nsyn[2] & nsyn[3]));
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assign A2to3[1] = (~(nsyn[2] & syn[3]));
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assign A2to3[2] = (~( syn[2] & nsyn[3]));
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assign A2to3[3] = (~( syn[2] & syn[3]));
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assign A4to5[0] = (~(nsyn[4] & nsyn[5]));
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assign A4to5[1] = (~(nsyn[4] & syn[5]));
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assign A4to5[2] = (~( syn[4] & nsyn[5]));
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assign A4to5[3] = (~( syn[4] & syn[5]));
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assign A6to7[0] = (~(nsyn[6] & nsyn[7]));
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assign A6to7[1] = (~(nsyn[6] & syn[7]));
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assign A6to7[2] = (~( syn[6] & nsyn[7]));
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//assign A6to7[3] = (~( syn[6] & syn[7]));
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assign DcdD[0] = (~(A0to1[3] | A2to3[2] | A4to5[0] | A6to7[0])); // 11 10 00 00
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assign DcdD[1] = (~(A0to1[3] | A2to3[1] | A4to5[0] | A6to7[0])); // 11 01 00 00
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assign DcdD[2] = (~(A0to1[2] | A2to3[3] | A4to5[0] | A6to7[0])); // 10 11 00 00
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assign DcdD[3] = (~(A0to1[1] | A2to3[3] | A4to5[0] | A6to7[0])); // 01 11 00 00
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assign DcdD[4] = (~(A0to1[3] | A2to3[0] | A4to5[2] | A6to7[0])); // 11 00 10 00
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assign DcdD[5] = (~(A0to1[2] | A2to3[2] | A4to5[2] | A6to7[0])); // 10 10 10 00
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assign DcdD[6] = (~(A0to1[1] | A2to3[2] | A4to5[2] | A6to7[0])); // 01 10 10 00
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assign DcdD[7] = (~(A0to1[2] | A2to3[1] | A4to5[2] | A6to7[0])); // 10 01 10 00
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assign DcdD[8] = (~(A0to1[1] | A2to3[1] | A4to5[2] | A6to7[0])); // 01 01 10 00
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assign DcdD[9] = (~(A0to1[0] | A2to3[3] | A4to5[2] | A6to7[0])); // 00 11 10 00
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assign DcdD[10] = (~(A0to1[3] | A2to3[3] | A4to5[2] | A6to7[0])); // 11 11 10 00
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assign DcdD[11] = (~(A0to1[3] | A2to3[0] | A4to5[1] | A6to7[0])); // 11 00 01 00
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assign DcdD[12] = (~(A0to1[2] | A2to3[2] | A4to5[1] | A6to7[0])); // 10 10 01 00
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assign DcdD[13] = (~(A0to1[1] | A2to3[2] | A4to5[1] | A6to7[0])); // 01 10 01 00
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assign DcdD[14] = (~(A0to1[2] | A2to3[1] | A4to5[1] | A6to7[0])); // 10 01 01 00
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assign DcdD[15] = (~(A0to1[1] | A2to3[1] | A4to5[1] | A6to7[0])); // 01 01 01 00
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assign DcdD[16] = (~(A0to1[0] | A2to3[3] | A4to5[1] | A6to7[0])); // 00 11 01 00
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assign DcdD[17] = (~(A0to1[3] | A2to3[3] | A4to5[1] | A6to7[0])); // 11 11 01 00
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assign DcdD[18] = (~(A0to1[2] | A2to3[0] | A4to5[3] | A6to7[0])); // 10 00 11 00
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assign DcdD[19] = (~(A0to1[1] | A2to3[0] | A4to5[3] | A6to7[0])); // 01 00 11 00
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assign DcdD[20] = (~(A0to1[0] | A2to3[2] | A4to5[3] | A6to7[0])); // 00 10 11 00
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assign DcdD[21] = (~(A0to1[3] | A2to3[2] | A4to5[3] | A6to7[0])); // 11 10 11 00
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assign DcdD[22] = (~(A0to1[0] | A2to3[1] | A4to5[3] | A6to7[0])); // 00 01 11 00
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assign DcdD[23] = (~(A0to1[3] | A2to3[1] | A4to5[3] | A6to7[0])); // 11 01 11 00
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assign DcdD[24] = (~(A0to1[2] | A2to3[3] | A4to5[3] | A6to7[0])); // 10 11 11 00
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assign DcdD[25] = (~(A0to1[1] | A2to3[3] | A4to5[3] | A6to7[0])); // 01 11 11 00
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assign DcdD[26] = (~(A0to1[3] | A2to3[0] | A4to5[0] | A6to7[2])); // 11 00 00 10
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assign DcdD[27] = (~(A0to1[2] | A2to3[2] | A4to5[0] | A6to7[2])); // 10 10 00 10
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assign DcdD[28] = (~(A0to1[1] | A2to3[2] | A4to5[0] | A6to7[2])); // 01 10 00 10
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assign DcdD[29] = (~(A0to1[2] | A2to3[1] | A4to5[0] | A6to7[2])); // 10 01 00 10
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assign DcdD[30] = (~(A0to1[1] | A2to3[1] | A4to5[0] | A6to7[2])); // 01 01 00 10
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assign DcdD[31] = (~(A0to1[0] | A2to3[3] | A4to5[0] | A6to7[2])); // 00 11 00 10
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assign DcdD[32] = (~(A0to1[3] | A2to3[3] | A4to5[0] | A6to7[2])); // 11 11 00 10
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assign DcdD[33] = (~(A0to1[2] | A2to3[0] | A4to5[2] | A6to7[2])); // 10 00 10 10
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assign DcdD[34] = (~(A0to1[1] | A2to3[0] | A4to5[2] | A6to7[2])); // 01 00 10 10
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assign DcdD[35] = (~(A0to1[0] | A2to3[2] | A4to5[2] | A6to7[2])); // 00 10 10 10
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assign DcdD[36] = (~(A0to1[3] | A2to3[2] | A4to5[2] | A6to7[2])); // 11 10 10 10
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assign DcdD[37] = (~(A0to1[0] | A2to3[1] | A4to5[2] | A6to7[2])); // 00 01 10 10
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assign DcdD[38] = (~(A0to1[3] | A2to3[1] | A4to5[2] | A6to7[2])); // 11 01 10 10
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assign DcdD[39] = (~(A0to1[2] | A2to3[3] | A4to5[2] | A6to7[2])); // 10 11 10 10
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assign DcdD[40] = (~(A0to1[1] | A2to3[3] | A4to5[2] | A6to7[2])); // 01 11 10 10
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assign DcdD[41] = (~(A0to1[2] | A2to3[0] | A4to5[1] | A6to7[2])); // 10 00 01 10
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assign DcdD[42] = (~(A0to1[1] | A2to3[0] | A4to5[1] | A6to7[2])); // 01 00 01 10
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assign DcdD[43] = (~(A0to1[0] | A2to3[2] | A4to5[1] | A6to7[2])); // 00 10 01 10
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assign DcdD[44] = (~(A0to1[3] | A2to3[2] | A4to5[1] | A6to7[2])); // 11 10 01 10
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assign DcdD[45] = (~(A0to1[0] | A2to3[1] | A4to5[1] | A6to7[2])); // 00 01 01 10
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assign DcdD[46] = (~(A0to1[3] | A2to3[1] | A4to5[1] | A6to7[2])); // 11 01 01 10
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assign DcdD[47] = (~(A0to1[2] | A2to3[3] | A4to5[1] | A6to7[2])); // 10 11 01 10
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assign DcdD[48] = (~(A0to1[1] | A2to3[3] | A4to5[1] | A6to7[2])); // 01 11 01 10
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assign DcdD[49] = (~(A0to1[0] | A2to3[0] | A4to5[3] | A6to7[2])); // 00 00 11 10
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assign DcdD[50] = (~(A0to1[3] | A2to3[0] | A4to5[3] | A6to7[2])); // 11 00 11 10
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assign DcdD[51] = (~(A0to1[2] | A2to3[2] | A4to5[3] | A6to7[2])); // 10 10 11 10
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assign DcdD[52] = (~(A0to1[1] | A2to3[2] | A4to5[3] | A6to7[2])); // 01 10 11 10
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assign DcdD[53] = (~(A0to1[2] | A2to3[1] | A4to5[3] | A6to7[2])); // 10 01 11 10
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assign DcdD[54] = (~(A0to1[1] | A2to3[1] | A4to5[3] | A6to7[2])); // 01 01 11 10
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assign DcdD[55] = (~(A0to1[0] | A2to3[3] | A4to5[3] | A6to7[2])); // 00 11 11 10
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assign DcdD[56] = (~(A0to1[3] | A2to3[3] | A4to5[3] | A6to7[2])); // 11 11 11 10
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assign DcdD[57] = (~(A0to1[3] | A2to3[0] | A4to5[0] | A6to7[1])); // 11 00 00 01
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assign DcdD[58] = (~(A0to1[2] | A2to3[2] | A4to5[0] | A6to7[1])); // 10 10 00 01
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assign DcdD[59] = (~(A0to1[1] | A2to3[2] | A4to5[0] | A6to7[1])); // 01 10 00 01
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assign DcdD[60] = (~(A0to1[2] | A2to3[1] | A4to5[0] | A6to7[1])); // 10 01 00 01
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assign DcdD[61] = (~(A0to1[1] | A2to3[1] | A4to5[0] | A6to7[1])); // 01 01 00 01
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assign DcdD[62] = (~(A0to1[0] | A2to3[3] | A4to5[0] | A6to7[1])); // 00 11 00 01
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assign DcdD[63] = (~(A0to1[3] | A2to3[3] | A4to5[0] | A6to7[1])); // 11 11 00 01
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assign DcdD[64] = (~(A0to1[2] | A2to3[0] | A4to5[0] | A6to7[0])); // 10 00 00 00
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assign DcdD[65] = (~(A0to1[1] | A2to3[0] | A4to5[0] | A6to7[0])); // 01 00 00 00
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assign DcdD[66] = (~(A0to1[0] | A2to3[2] | A4to5[0] | A6to7[0])); // 00 10 00 00
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assign DcdD[67] = (~(A0to1[0] | A2to3[1] | A4to5[0] | A6to7[0])); // 00 01 00 00
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assign DcdD[68] = (~(A0to1[0] | A2to3[0] | A4to5[2] | A6to7[0])); // 00 00 10 00
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assign DcdD[69] = (~(A0to1[0] | A2to3[0] | A4to5[1] | A6to7[0])); // 00 00 01 00
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assign DcdD[70] = (~(A0to1[0] | A2to3[0] | A4to5[0] | A6to7[2])); // 00 00 00 10
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assign DcdD[71] = (~(A0to1[0] | A2to3[0] | A4to5[0] | A6to7[1])); // 00 00 00 01
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assign synzero = (~(A0to1[0] | A2to3[0] | A4to5[0] | A6to7[0])); // 00 00 00 00
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assign corrd[0:63] = din[0:63] ^ DcdD[0:63];
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assign sbe_int = (DcdD[0:71] != {72{1'b0}}) ? 1'b1 :
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1'b0;
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assign sbe = sbe_int;
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assign ue = (~sbe_int) & (~synzero) & encorr;
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end
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endgenerate
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generate // syndrome bits inverted
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if (REGSIZE == 32)
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begin : ecc32
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wire [0:6] syn;
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wire [0:38] DcdD; // decode data bits
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wire synzero;
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wire sbe_int;
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wire [0:3] A0to1;
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wire [0:3] A2to3;
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wire [0:7] A4to6;
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// ====================================================================
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// 32 Data Bits, 7 Check bits
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// Single bit error correction, Double bit error detection
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// ====================================================================
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// ECC Matrix Description
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// ====================================================================
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// Syn 0 111011010011101001100101101101001000000
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// Syn 1 110110101011010101010101011010100100000
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// Syn 2 101101100110110011001100110110010010000
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// Syn 3 011100011110001111000011110001110001000
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// Syn 4 000011111110000000111111110000000000100
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// Syn 5 000000000001111111111111110000000000010
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// Syn 6 000000000000000000000000001111110000001
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assign syn = (~nsyn[0:6]);
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assign A0to1[0] = (~(nsyn[0] & nsyn[1] & encorr));
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assign A0to1[1] = (~(nsyn[0] & syn[1] & encorr));
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assign A0to1[2] = (~( syn[0] & nsyn[1] & encorr));
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assign A0to1[3] = (~( syn[0] & syn[1] & encorr));
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assign A2to3[0] = (~(nsyn[2] & nsyn[3]));
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assign A2to3[1] = (~(nsyn[2] & syn[3]));
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assign A2to3[2] = (~( syn[2] & nsyn[3]));
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assign A2to3[3] = (~( syn[2] & syn[3]));
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assign A4to6[0] = (~(nsyn[4] & nsyn[5] & nsyn[6]));
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assign A4to6[1] = (~(nsyn[4] & nsyn[5] & syn[6]));
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assign A4to6[2] = (~(nsyn[4] & syn[5] & nsyn[6]));
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assign A4to6[3] = (~(nsyn[4] & syn[5] & syn[6]));
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assign A4to6[4] = (~( syn[4] & nsyn[5] & nsyn[6]));
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assign A4to6[5] = (~( syn[4] & nsyn[5] & syn[6]));
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assign A4to6[6] = (~( syn[4] & syn[5] & nsyn[6]));
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assign A4to6[7] = (~( syn[4] & syn[5] & syn[6]));
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assign DcdD[0] = (~(A0to1[3] | A2to3[2] | A4to6[0])); // 11 10 000
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assign DcdD[1] = (~(A0to1[3] | A2to3[1] | A4to6[0])); // 11 01 000
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assign DcdD[2] = (~(A0to1[2] | A2to3[3] | A4to6[0])); // 10 11 000
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assign DcdD[3] = (~(A0to1[1] | A2to3[3] | A4to6[0])); // 01 11 000
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assign DcdD[4] = (~(A0to1[3] | A2to3[0] | A4to6[4])); // 11 00 100
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assign DcdD[5] = (~(A0to1[2] | A2to3[2] | A4to6[4])); // 10 10 100
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assign DcdD[6] = (~(A0to1[1] | A2to3[2] | A4to6[4])); // 01 10 100
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assign DcdD[7] = (~(A0to1[2] | A2to3[1] | A4to6[4])); // 10 01 100
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assign DcdD[8] = (~(A0to1[1] | A2to3[1] | A4to6[4])); // 01 01 100
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assign DcdD[9] = (~(A0to1[0] | A2to3[3] | A4to6[4])); // 00 11 100
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assign DcdD[10] = (~(A0to1[3] | A2to3[3] | A4to6[4])); // 11 11 100
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assign DcdD[11] = (~(A0to1[3] | A2to3[0] | A4to6[2])); // 11 00 010
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assign DcdD[12] = (~(A0to1[2] | A2to3[2] | A4to6[2])); // 10 10 010
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assign DcdD[13] = (~(A0to1[1] | A2to3[2] | A4to6[2])); // 01 10 010
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assign DcdD[14] = (~(A0to1[2] | A2to3[1] | A4to6[2])); // 10 01 010
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assign DcdD[15] = (~(A0to1[1] | A2to3[1] | A4to6[2])); // 01 01 010
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assign DcdD[16] = (~(A0to1[0] | A2to3[3] | A4to6[2])); // 00 11 010
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assign DcdD[17] = (~(A0to1[3] | A2to3[3] | A4to6[2])); // 11 11 010
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assign DcdD[18] = (~(A0to1[2] | A2to3[0] | A4to6[6])); // 10 00 110
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assign DcdD[19] = (~(A0to1[1] | A2to3[0] | A4to6[6])); // 01 00 110
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assign DcdD[20] = (~(A0to1[0] | A2to3[2] | A4to6[6])); // 00 10 110
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assign DcdD[21] = (~(A0to1[3] | A2to3[2] | A4to6[6])); // 11 10 110
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assign DcdD[22] = (~(A0to1[0] | A2to3[1] | A4to6[6])); // 00 01 110
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assign DcdD[23] = (~(A0to1[3] | A2to3[1] | A4to6[6])); // 11 01 110
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assign DcdD[24] = (~(A0to1[2] | A2to3[3] | A4to6[6])); // 10 11 110
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assign DcdD[25] = (~(A0to1[1] | A2to3[3] | A4to6[6])); // 01 11 110
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assign DcdD[26] = (~(A0to1[3] | A2to3[0] | A4to6[1])); // 11 00 001
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assign DcdD[27] = (~(A0to1[2] | A2to3[2] | A4to6[1])); // 10 10 001
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assign DcdD[28] = (~(A0to1[1] | A2to3[2] | A4to6[1])); // 01 10 001
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assign DcdD[29] = (~(A0to1[2] | A2to3[1] | A4to6[1])); // 10 01 001
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assign DcdD[30] = (~(A0to1[1] | A2to3[1] | A4to6[1])); // 01 01 001
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assign DcdD[31] = (~(A0to1[0] | A2to3[3] | A4to6[1])); // 00 11 001
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assign DcdD[32] = (~(A0to1[2] | A2to3[0] | A4to6[0])); // 10 00 000
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assign DcdD[33] = (~(A0to1[1] | A2to3[0] | A4to6[0])); // 01 00 000
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assign DcdD[34] = (~(A0to1[0] | A2to3[2] | A4to6[0])); // 00 10 000
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assign DcdD[35] = (~(A0to1[0] | A2to3[1] | A4to6[0])); // 00 01 000
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assign DcdD[36] = (~(A0to1[0] | A2to3[0] | A4to6[4])); // 00 00 100
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assign DcdD[37] = (~(A0to1[0] | A2to3[0] | A4to6[2])); // 00 00 010
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assign DcdD[38] = (~(A0to1[0] | A2to3[0] | A4to6[1])); // 00 00 001
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assign synzero = (~(A0to1[0] | A2to3[0] | A4to6[0])); // 00 00 000
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assign corrd[0:31] = din[0:31] ^ DcdD[0:31];
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assign sbe_int = (DcdD[0:38] != {39{1'b0}}) ? 1'b1 :
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1'b0;
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assign sbe = sbe_int;
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assign ue = (~sbe_int) & (~synzero) & encorr;
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//mark_unused(A4to6(3));
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//mark_unused(A4to6(5));
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//mark_unused(A4to6(7));
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||
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end
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endgenerate
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endmodule
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