98 lines
2.4 KiB
C++
98 lines
2.4 KiB
C++
/*
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* Copyright (c) 2002 Stephen Williams (steve@icarus.com)
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*
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* This source code is free software; you can redistribute it
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* and/or modify it in source code form under the terms of the GNU
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* General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CVS_IDENT
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#ident "$Id: async.cc,v 1.4 2002/08/18 22:07:16 steve Exp $"
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#endif
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# include "config.h"
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# include "functor.h"
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# include "netlist.h"
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# include <assert.h>
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bool NetAssign::is_asynchronous()
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{
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return true;
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}
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bool NetCondit::is_asynchronous()
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{
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return false;
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}
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bool NetEvWait::is_asynchronous()
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{
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/* The "sense" set contains the set of Nexa that are in the
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sensitivity list. We also presume here that the list is
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only LEVEL sensitive. */
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NexusSet*sense = new NexusSet;
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for (unsigned idx = 0 ; idx < nevents_ ; idx += 1) {
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NexusSet*tmp = event(idx)->nex_async_();
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if (tmp == 0) {
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delete sense;
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return false;
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}
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sense->add(*tmp);
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delete tmp;
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}
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NexusSet*inputs = statement_->nex_input();
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if (! sense->contains(*inputs)) {
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delete sense;
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delete inputs;
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return false;
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}
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delete sense;
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delete inputs;
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return true;
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}
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bool NetProc::is_asynchronous()
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{
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return false;
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}
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bool NetProcTop::is_asynchronous()
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{
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if (type_ == NetProcTop::KINITIAL)
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return false;
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return statement_->is_asynchronous();
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}
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/*
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* $Log: async.cc,v $
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* Revision 1.4 2002/08/18 22:07:16 steve
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* Detect temporaries in sequential block synthesis.
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*
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* Revision 1.3 2002/08/12 01:34:58 steve
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* conditional ident string using autoconfig.
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*
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* Revision 1.2 2002/07/04 00:24:16 steve
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* initial statements are not asynchronous.
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*
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* Revision 1.1 2002/06/30 02:21:31 steve
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* Add structure for asynchronous logic synthesis.
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*
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*/
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