156 lines
4.3 KiB
C++
156 lines
4.3 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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#if !defined(WINNT)
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#ident "$Id: net_func.cc,v 1.2 2002/03/31 04:07:40 steve Exp $"
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#endif
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# include "config.h"
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# include "netlist.h"
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# include "PExpr.h"
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# include <iostream>
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static unsigned count_def_pins(const NetFuncDef*def)
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{
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unsigned sum = 0;
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for (unsigned idx = 0 ; idx < def->port_count() ; idx += 1)
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sum += def->port(idx)->pin_count();
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return sum;
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}
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NetUserFunc::NetUserFunc(NetScope*s, const char*n, NetScope*d)
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: NetNode(s, n, count_def_pins(d->func_def())), def_(d)
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{
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NetFuncDef*def = def_->func_def();
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unsigned port_wid = port_width(0);
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for (unsigned idx = 0 ; idx < port_wid ; idx += 1) {
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pin(idx).set_dir(Link::OUTPUT);
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pin(idx).set_name(def_->basename(), idx);
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}
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unsigned pin_base = port_wid;
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for (unsigned idx = 1 ; idx < port_count() ; idx += 1) {
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const NetNet*port_sig = def->port(idx);
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unsigned bits = port_width(idx);
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for (unsigned bit = 0; bit < bits; bit += 1) {
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pin(pin_base+bit).set_dir(Link::INPUT);
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pin(pin_base+bit).set_name(port_sig->name(), bit);
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pin(pin_base+bit).drive0(Link::HIGHZ);
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pin(pin_base+bit).drive1(Link::HIGHZ);
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}
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pin_base += bits;
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}
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}
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NetUserFunc::~NetUserFunc()
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{
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}
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unsigned NetUserFunc::port_count() const
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{
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return def_->func_def()->port_count();
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}
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unsigned NetUserFunc::port_width(unsigned port) const
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{
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NetFuncDef*def = def_->func_def();
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assert(port < def->port_count());
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const NetNet*port_sig = def->port(port);
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return port_sig->pin_count();
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}
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Link& NetUserFunc::port_pin(unsigned port, unsigned idx)
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{
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NetFuncDef*def = def_->func_def();
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unsigned pin_base = 0;
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const NetNet*port_sig;
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assert(port < def->port_count());
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for (unsigned port_idx = 0 ; port_idx < port ; port_idx += 1) {
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port_sig = def->port(port_idx);
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pin_base += port_sig->pin_count();
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}
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port_sig = def->port(port);
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assert(idx < port_sig->pin_count());
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assert((pin_base+idx) < pin_count());
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return pin(pin_base+idx);
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}
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const NetScope* NetUserFunc::def() const
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{
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return def_;
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}
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/*
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* This method of the PECallFunction class checks that the parameters
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* of the PECallFunction match the function definition. This is used
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* during elaboration to validate the parameters before using them.
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*/
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bool PECallFunction::check_call_matches_definition_(Design*des, NetScope*dscope) const
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{
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assert(dscope);
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/* How many parameters have I got? Normally the size of the
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list is correct, but there is the special case of a list of
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1 nil pointer. This is how the parser tells me of no
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parameter. In other words, ``func()'' is 1 nil parameter. */
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unsigned parms_count = parms_.count();
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if ((parms_count == 1) && (parms_[0] == 0))
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parms_count = 0;
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if (dscope->type() != NetScope::FUNC) {
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cerr << get_line() << ": error: Attempt to call scope "
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<< dscope->name() << " as a function." << endl;
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des->errors += 1;
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return false;
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}
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if ((parms_count+1) != dscope->func_def()->port_count()) {
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cerr << get_line() << ": error: Function " << dscope->name()
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<< " expects " << (dscope->func_def()->port_count()-1)
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<< " parameters, you passed " << parms_count << "."
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<< endl;
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des->errors += 1;
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return false;
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}
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return true;
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}
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/*
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* $Log: net_func.cc,v $
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* Revision 1.2 2002/03/31 04:07:40 steve
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* Update for gcc 3.0
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*
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* Revision 1.1 2002/03/09 02:10:22 steve
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* Add the NetUserFunc netlist node.
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*
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*/
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