128 lines
3.5 KiB
C++
128 lines
3.5 KiB
C++
/*
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* Copyright (c) 2001 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: eval_rconst.cc,v 1.6 2003/02/01 23:37:34 steve Exp $"
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#endif
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# include "config.h"
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# include "PExpr.h"
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# include "verireal.h"
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verireal* PExpr::eval_rconst(const Design*, const NetScope*) const
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{
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return 0;
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}
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verireal* PEFNumber::eval_rconst(const Design*, const NetScope*) const
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{
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verireal*res = new verireal;
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*res = *value_;
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return res;
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}
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verireal* PENumber::eval_rconst(const Design*, const NetScope*) const
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{
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verireal*res = new verireal(value_->as_long());
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return res;
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}
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verireal* PEBinary::eval_rconst(const Design*des, const NetScope*scope) const
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{
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verireal*lef = left_->eval_rconst(des, scope);
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verireal*rig = right_->eval_rconst(des, scope);
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verireal*res = 0;
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switch (op_) {
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case '*':
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if (lef == 0)
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break;
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if (rig == 0)
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break;
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res = new verireal;
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*res = (*lef) * (*rig);
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break;
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default:
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break;
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}
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delete lef;
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delete rig;
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return res;
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}
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verireal* PEIdent::eval_rconst(const Design*des, const NetScope*scope) const
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{
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assert(scope);
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const NetExpr*expr = des->find_parameter(scope, path_);
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if (expr == 0)
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return 0;
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/* Is this a real valued parameter? If so, then evaluate it
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as a real expression and return the resulting verireal. */
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if (expr->expr_type() == NetExpr::ET_REAL) {
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const NetECReal*ereal = dynamic_cast<const NetECReal*>(expr);
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if (ereal == 0) {
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cerr << get_line() << ": internal error: "
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<< "Unable to evaluate real constant expression "
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<< "(parameter=" << path_ << "): " << *expr << endl;
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return 0;
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}
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return new verireal(ereal->value());
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}
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verinum* val = eval_const(des, scope);
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if (val == 0)
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return 0;
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verireal*res = new verireal(val->as_long());
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delete val;
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return res;
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}
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/*
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* $Log: eval_rconst.cc,v $
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* Revision 1.6 2003/02/01 23:37:34 steve
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* Allow parameter expressions to be type real.
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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 2001/11/07 04:01:59 steve
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* eval_const uses scope instead of a string path.
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*
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* Revision 1.3 2001/11/06 06:11:55 steve
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* Support more real arithmetic in delay constants.
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*
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* Revision 1.2 2001/07/25 03:10:49 steve
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* Create a config.h.in file to hold all the config
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* junk, and support gcc 3.0. (Stephan Boettcher)
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*
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* Revision 1.1 2001/01/14 23:04:56 steve
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* Generalize the evaluation of floating point delays, and
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* get it working with delay assignment statements.
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*
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* Allow parameters to be referenced by hierarchical name.
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*
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*/
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