iverilog/PExpr.cc

/*
 * Copyright (c) 1998-2008 Stephen Williams <steve@icarus.com>
 *
 *    This source code is free software; you can redistribute it
 *    and/or modify it in source code form under the terms of the GNU
 *    General Public License as published by the Free Software
 *    Foundation; either version 2 of the License, or (at your option)
 *    any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */

# include "config.h"

# include  <iostream>

# include  "compiler.h"
# include  "PExpr.h"
# include  "Module.h"
# include  "netmisc.h"
# include  <typeinfo>

PExpr::PExpr()
{
      expr_type_ = IVL_VT_NO_TYPE;
}

PExpr::~PExpr()
{
}

bool PExpr::has_aa_term(Design*, NetScope*) const
{
      return false;
}

bool PExpr::is_the_same(const PExpr*that) const
{
      return typeid(this) == typeid(that);
}

NetNet* PExpr::elaborate_lnet(Design*des, NetScope*) const
{
      cerr << get_fileline() << ": error: expression not valid in assign l-value: "
	   << *this << endl;
      return 0;
}

NetNet* PExpr::elaborate_bi_net(Design*des, NetScope*) const
{
      cerr << get_fileline() << ": error: "
	   << "expression not valid as argument to inout port: "
	   << *this << endl;
      return 0;
}

PEBinary::PEBinary(char op, PExpr*l, PExpr*r)
: op_(op), left_(l), right_(r)
{
}

PEBinary::~PEBinary()
{
}

bool PEBinary::has_aa_term(Design*des, NetScope*scope) const
{
      assert(left_ && right_);
      return left_->has_aa_term(des, scope) || right_->has_aa_term(des, scope);
}

PEBComp::PEBComp(char op, PExpr*l, PExpr*r)
: PEBinary(op, l, r)
{
}

PEBComp::~PEBComp()
{
}

PEBLogic::PEBLogic(char op, PExpr*l, PExpr*r)
: PEBinary(op, l, r)
{
      assert(op == 'a' || op == 'o');
}

PEBLogic::~PEBLogic()
{
}

PEBLeftWidth::PEBLeftWidth(char op, PExpr*l, PExpr*r)
: PEBinary(op, l, r)
{
}

PEBLeftWidth::~PEBLeftWidth()
{
}

PEBPower::PEBPower(char op, PExpr*l, PExpr*r)
: PEBLeftWidth(op, l, r)
{
}

PEBPower::~PEBPower()
{
}

PEBShift::PEBShift(char op, PExpr*l, PExpr*r)
: PEBLeftWidth(op, l, r)
{
}

PEBShift::~PEBShift()
{
}

PECallFunction::PECallFunction(const pform_name_t&n, const vector<PExpr *> &parms)
: path_(n), parms_(parms)
{
}

static pform_name_t pn_from_ps(perm_string n)
{
      name_component_t tmp_name (n);
      pform_name_t tmp;
      tmp.push_back(tmp_name);
      return tmp;
}

PECallFunction::PECallFunction(perm_string n, const vector<PExpr*>&parms)
: path_(pn_from_ps(n)), parms_(parms)
{
}

PECallFunction::PECallFunction(perm_string n)
: path_(pn_from_ps(n))
{
}

// NOTE: Anachronism. Try to work all use of svector out.
PECallFunction::PECallFunction(const pform_name_t&n, const svector<PExpr *> &parms)
: path_(n), parms_(vector_from_svector(parms))
{
}

PECallFunction::PECallFunction(perm_string n, const svector<PExpr*>&parms)
: path_(pn_from_ps(n)), parms_(vector_from_svector(parms))
{
}

PECallFunction::~PECallFunction()
{
}

bool PECallFunction::has_aa_term(Design*des, NetScope*scope) const
{
      bool flag = false;
      for (unsigned idx = 0 ; idx < parms_.size() ; idx += 1) {
	    flag = parms_[idx]->has_aa_term(des, scope) || flag;
      }
      return flag;
}

PEConcat::PEConcat(const svector<PExpr*>&p, PExpr*r)
: parms_(p), tested_widths_(p.count()), repeat_(r)
{
}

PEConcat::~PEConcat()
{
      delete repeat_;
}

bool PEConcat::has_aa_term(Design*des, NetScope*scope) const
{
      bool flag = false;
      for (unsigned idx = 0 ; idx < parms_.count() ; idx += 1) {
	    flag = parms_[idx]->has_aa_term(des, scope) || flag;
      }
      if (repeat_)
            flag = repeat_->has_aa_term(des, scope) || flag;

      return flag;
}

PEEvent::PEEvent(PEEvent::edge_t t, PExpr*e)
: type_(t), expr_(e)
{
}

PEEvent::~PEEvent()
{
}

PEEvent::edge_t PEEvent::type() const
{
      return type_;
}

bool PEEvent::has_aa_term(Design*des, NetScope*scope) const
{
      assert(expr_);
      return expr_->has_aa_term(des, scope);
}

PExpr* PEEvent::expr() const
{
      return expr_;
}

PEFNumber::PEFNumber(verireal*v)
: value_(v)
{
}

PEFNumber::~PEFNumber()
{
      delete value_;
}

const verireal& PEFNumber::value() const
{
      return *value_;
}

PEIdent::PEIdent(const pform_name_t&that)
: path_(that)
{
}

PEIdent::PEIdent(perm_string s)
{
      path_.push_back(name_component_t(s));
}

PEIdent::~PEIdent()
{
}

bool PEIdent::has_aa_term(Design*des, NetScope*scope) const
{
      NetNet*       net = 0;
      const NetExpr*par = 0;
      NetEvent*     eve = 0;

      const NetExpr*ex1, *ex2;

      scope = symbol_search(0, des, scope, path_, net, par, eve, ex1, ex2);

      if (scope)
            return scope->is_auto();
      else
            return false;
}

PENumber::PENumber(verinum*vp)
: value_(vp)
{
      assert(vp);
}

PENumber::~PENumber()
{
      delete value_;
}

const verinum& PENumber::value() const
{
      return *value_;
}

bool PENumber::is_the_same(const PExpr*that) const
{
      const PENumber*obj = dynamic_cast<const PENumber*>(that);
      if (obj == 0)
	    return false;

      return *value_ == *obj->value_;
}

PEString::PEString(char*s)
: text_(s)
{
}

PEString::~PEString()
{
      delete[]text_;
}

string PEString::value() const
{
      return text_;
}

PETernary::PETernary(PExpr*e, PExpr*t, PExpr*f)
: expr_(e), tru_(t), fal_(f)
{
}

PETernary::~PETernary()
{
}

bool PETernary::has_aa_term(Design*des, NetScope*scope) const
{
      assert(expr_ && tru_ && fal_);
      return expr_->has_aa_term(des, scope)
           || tru_->has_aa_term(des, scope)
           || fal_->has_aa_term(des, scope);
}

PEUnary::PEUnary(char op, PExpr*ex)
: op_(op), expr_(ex)
{
}

PEUnary::~PEUnary()
{
}

bool PEUnary::has_aa_term(Design*des, NetScope*scope) const
{
      assert(expr_);
      return expr_->has_aa_term(des, scope);
}