162 lines
4.1 KiB
C++
162 lines
4.1 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: net_nex_output.cc,v 1.12 2005/02/14 04:58:50 steve Exp $"
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#endif
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# include "config.h"
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# include <iostream>
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# include <cassert>
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# include <typeinfo>
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# include "netlist.h"
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# include "netmisc.h"
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void NetProc::nex_output(NexusSet&out)
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{
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cerr << get_line()
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<< ": internal error: NetProc::nex_output not implemented"
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<< endl;
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cerr << get_line()
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<< ": : on object type " << typeid(*this).name()
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<< endl;
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}
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/*
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* Assignments have as output all the bits of the concatenated signals
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* of the l-value.
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*/
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void NetAssignBase::nex_output(NexusSet&out)
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{
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for (NetAssign_*cur = lval_ ; cur ; cur = cur->more) {
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if (NetNet*lsig = cur->sig()) {
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out.add(lsig->pin(0).nexus());
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} else {
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/* Quoting from netlist.h comments for class NetMemory:
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* "This is not a node because memory objects can only be
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* accessed by behavioral code."
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*/
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cerr << get_line() << ": internal error: "
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<< "NetAssignBase::nex_output on unsupported lval ";
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dump_lval(cerr);
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cerr << endl;
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}
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}
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}
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void NetBlock::nex_output(NexusSet&out)
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{
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if (last_ == 0)
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return;
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NetProc*cur = last_;
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do {
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cur = cur->next_;
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cur->nex_output(out);
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} while (cur != last_);
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}
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void NetCase::nex_output(NexusSet&out)
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{
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for (unsigned idx = 0 ; idx < nitems_ ; idx += 1) {
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assert(items_[idx].statement);
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items_[idx].statement->nex_output(out);
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}
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}
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void NetCondit::nex_output(NexusSet&out)
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{
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if (if_ != 0)
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if_->nex_output(out);
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if (else_ != 0)
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else_->nex_output(out);
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}
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void NetEvWait::nex_output(NexusSet&out)
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{
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assert(statement_);
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statement_->nex_output(out);
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}
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void NetPDelay::nex_output(NexusSet&out)
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{
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if (statement_) statement_->nex_output(out);
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}
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/*
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* For the purposes of synthesis, system task calls have no output at
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* all. This is OK because most system tasks are not synthesizeable in
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* the first place.
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*/
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void NetSTask::nex_output(NexusSet&out)
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{
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}
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void NetWhile::nex_output(NexusSet&out)
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{
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if (proc_ != 0)
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proc_->nex_output(out);
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}
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/*
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* $Log: net_nex_output.cc,v $
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* Revision 1.12 2005/02/14 04:58:50 steve
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* l-value input may be a vector.
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*
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* Revision 1.11 2004/09/16 03:17:33 steve
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* net_output handles l-value concatenations.
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*
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* Revision 1.10 2004/08/28 16:23:05 steve
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* Fix use of system tasks in AT_STAR statements.
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*
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* Revision 1.9 2004/06/30 15:32:18 steve
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* nex_output for NetPDelay statements.
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*
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* Revision 1.8 2003/12/20 00:59:31 steve
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* Synthesis debug messages.
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*
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* Revision 1.7 2003/10/26 04:51:39 steve
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* Output of While is output of while substatement.
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*
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* Revision 1.6 2002/09/17 04:39:20 steve
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* Account for part select in l-value.
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*
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* Revision 1.5 2002/08/12 01:34:59 steve
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* conditional ident string using autoconfig.
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*
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* Revision 1.4 2002/07/29 00:00:28 steve
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* Asynchronous synthesis of sequential blocks.
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*
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* Revision 1.3 2002/07/07 22:32:15 steve
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* Asynchronous synthesis of case statements.
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*
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* Revision 1.2 2002/07/01 00:54:21 steve
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* synth_asych of if/else requires redirecting the target
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* if sub-statements. Use NetNet objects to manage the
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* situation.
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*
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* Revision 1.1 2002/06/30 02:21:32 steve
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* Add structure for asynchronous logic synthesis.
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*
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*/
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