91 lines
4.1 KiB
Coq
91 lines
4.1 KiB
Coq
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//////////////////////////////////////////////////////////////////////
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//// ////
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//// File name "par_crit.v" ////
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//// ////
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//// This file is part of the "PCI bridge" project ////
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//// http://www.opencores.org/cores/pci/ ////
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//// ////
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//// Author(s): ////
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//// - Miha Dolenc (mihad@opencores.org) ////
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//// ////
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//// All additional information is avaliable in the README ////
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//// file. ////
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//// ////
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//// ////
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//////////////////////////////////////////////////////////////////////
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//// ////
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//// Copyright (C) 2001 Miha Dolenc, mihad@opencores.org ////
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//// ////
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//// This source file may be used and distributed without ////
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//// restriction provided that this copyright statement is not ////
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//// removed from the file and that any derivative work contains ////
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//// the original copyright notice and the associated disclaimer. ////
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//// ////
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//// This source file is free software; you can redistribute it ////
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//// and/or modify it under the terms of the GNU Lesser General ////
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//// Public License as published by the Free Software Foundation; ////
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//// either version 2.1 of the License, or (at your option) any ////
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//// later version. ////
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//// ////
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//// This source is distributed in the hope that it will be ////
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//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
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//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
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//// PURPOSE. See the GNU Lesser General Public License for more ////
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//// details. ////
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//// ////
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//// You should have received a copy of the GNU Lesser General ////
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//// Public License along with this source; if not, download it ////
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//// from http://www.opencores.org/lgpl.shtml ////
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//// ////
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//////////////////////////////////////////////////////////////////////
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//
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// CVS Revision History
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//
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// $Log: pci_par_crit.v,v $
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// Revision 1.2 2003/02/13 18:26:33 mihad
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// Cleaned up the code. No functional changes.
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//
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// Revision 1.1 2003/01/27 16:49:31 mihad
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// Changed module and file names. Updated scripts accordingly. FIFO synchronizations changed.
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//
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// Revision 1.3 2002/02/01 15:25:12 mihad
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// Repaired a few bugs, updated specification, added test bench files and design document
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//
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// Revision 1.2 2001/10/05 08:14:28 mihad
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// Updated all files with inclusion of timescale file for simulation purposes.
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//
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// Revision 1.1.1.1 2001/10/02 15:33:46 mihad
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// New project directory structure
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//
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//
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// module is used to separate logic which uses criticaly constrained inputs from slower logic.
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// It is used to synthesize critical timing logic separately with faster cells or without optimization
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// this one is used in parity generator/checker for calculating parity signal
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// synopsys translate_off
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`include "timescale.v"
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// synopsys translate_on
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module pci_par_crit
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(
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par_out,
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par_out_in,
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pci_cbe_en_in,
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data_par_in,
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pci_cbe_in
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) ;
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output par_out ;
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input par_out_in,
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pci_cbe_en_in,
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data_par_in ;
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input [3:0] pci_cbe_in ;
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assign par_out = pci_cbe_en_in ? par_out_in : ( pci_cbe_in[3] ^ pci_cbe_in[2] ^ pci_cbe_in[1] ^ pci_cbe_in[0] ^ data_par_in) ;
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endmodule
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