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/*
* Copyright (c) 2011 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
# include "sequential.h"
# include "expression.h"
# include "architec.h"
# include "compiler.h"
# include <iostream>
# include <cstdio>
# include <typeinfo>
# include <ivl_assert.h>
int SequentialStmt::emit(ostream&out, Entity*, Architecture*)
{
out << " // " << get_fileline() << ": internal error: "
<< "I don't know how to emit this sequential statement! "
<< "type=" << typeid(*this).name() << endl;
return 1;
}
int IfSequential::emit(ostream&out, Entity*ent, Architecture*arc)
{
int errors = 0;
out << "if (";
errors += cond_->emit(out, ent, arc);
out << ") begin" << endl;
for (list<SequentialStmt*>::iterator cur = if_.begin()
; cur != if_.end() ; ++cur)
errors += (*cur)->emit(out, ent, arc);
for (list<IfSequential::Elsif*>::iterator cur = elsif_.begin()
; cur != elsif_.end() ; ++cur) {
out << "end else if (";
errors += (*cur)->condition_emit(out, ent, arc);
out << ") begin" << endl;
errors += (*cur)->statement_emit(out, ent, arc);
}
if (! else_.empty()) {
out << "end else begin" << endl;
for (list<SequentialStmt*>::iterator cur = else_.begin()
; cur != else_.end() ; ++cur)
errors += (*cur)->emit(out, ent, arc);
}
out << "end" << endl;
return errors;
}
int IfSequential::Elsif::condition_emit(ostream&out, Entity*ent, Architecture*arc)
{
return cond_->emit(out, ent, arc);
}
int IfSequential::Elsif::statement_emit(ostream&out, Entity*ent, Architecture*arc)
{
int errors = 0;
for (list<SequentialStmt*>::iterator cur = if_.begin()
; cur != if_.end() ; ++cur)
errors += (*cur)->emit(out, ent, arc);
return errors;
}
int SignalSeqAssignment::emit(ostream&out, Entity*ent, Architecture*arc)
{
int errors = 0;
errors += lval_->emit(out, ent, arc);
if (waveform_.size() != 1) {
out << "/* Confusing waveform? */;" << endl;
errors += 1;
} else {
Expression*tmp = waveform_.front();
out << " <= ";
errors += tmp->emit(out, ent, arc);
out << ";" << endl;
}
return errors;
}
int VariableSeqAssignment::emit(ostream&out, Entity*ent, Architecture*arc)
{
int errors = 0;
errors += lval_->emit(out, ent, arc);
out << " = ";
errors += rval_->emit(out, ent, arc);
out << ";" << endl;
return errors;
}
int ProcedureCall::emit(ostream&out, Entity*, Architecture*)
{
out << " // " << get_fileline() << ": internal error: "
<< "I don't know how to emit this sequential statement! "
<< "type=" << typeid(*this).name() << endl;
return 1;
}
int LoopStatement::emit_substatements(ostream&out, Entity*ent, Architecture*arc)
{
int errors = 0;
for (list<SequentialStmt*>::iterator cur = stmts_.begin()
; cur != stmts_.end() ; ++cur) {
SequentialStmt*tmp = *cur;
errors += tmp->emit(out, ent, arc);
}
return errors;
}
int CaseSeqStmt::emit(ostream&out, Entity*ent, Architecture*arc)
{
int errors = 0;
out << "case (";
errors += cond_->emit(out, ent, arc);
out << ")" << endl;
for (list<CaseStmtAlternative*>::iterator cur = alt_.begin()
; cur != alt_.end() ; ++cur) {
CaseStmtAlternative*curp = *cur;
errors += curp ->emit(out, ent, arc);
}
out << "endcase" << endl;
return errors;
}
int CaseSeqStmt::CaseStmtAlternative::emit(ostream&out, Entity*ent, Architecture*arc)
{
int errors = 0;
if (exp_) {
errors += exp_->emit(out, ent, arc);
out << ":" << endl;
} else {
out << "default:" << endl;
}
SequentialStmt*curp;
switch (stmts_.size()) {
case 0:
out << "/* no op */;" << endl;
break;
case 1:
curp = stmts_.front();
errors += curp->emit(out, ent, arc);
break;
default:
out << "begin" << endl;
for (list<SequentialStmt*>::iterator cur = stmts_.begin()
; cur != stmts_.end() ; ++cur) {
curp = *cur;
errors += curp->emit(out, ent, arc);
}
out << "end" << endl;
break;
}
return errors;
}
int ForLoopStatement::emit(ostream&out, Entity*ent, Architecture*arc)
{
int errors = 0;
ivl_assert(*this, range_);
int64_t start_val;
bool start_rc = range_->msb()->evaluate(ent, arc, start_val);
int64_t finish_val;
bool finish_rc = range_->lsb()->evaluate(ent, arc, finish_val);
ivl_assert(*this, start_rc);
ivl_assert(*this, finish_rc);
if (range_->is_downto() && start_val < finish_val) {
out << "begin /* Degenerate loop at " << get_fileline() << " */ end" << endl;
return errors;
}
if (!range_->is_downto() && start_val > finish_val) {
out << "begin /* Degenerate loop at " << get_fileline() << " */ end" << endl;
return errors;
}
perm_string scope_name = loop_name();
if (scope_name.nil()) {
char buf[80];
snprintf(buf, sizeof buf, "__%p", this);
scope_name = lex_strings.make(buf);
}
out << "begin : " << scope_name << endl;
out << "longint \\" << it_ << " ;" << endl;
out << "for (\\" << it_ << " = " << start_val << " ; ";
if (range_->is_downto())
out << "\\" << it_ << " >= " << finish_val;
else
out << "\\" << it_ << " <= " << finish_val;
out << "; \\" << it_ << " = \\" << it_;
if (range_->is_downto())
out << " - 1";
else
out << " + 1";
out << ") begin" << endl;
errors += emit_substatements(out, ent, arc);
out << "end" << endl;
out << "end /* " << scope_name << " */" << endl;
return errors;
}
int WhileLoopStatement::emit(ostream&out, Entity*, Architecture*)
{
out << " // " << get_fileline() << ": internal error: "
<< "I don't know how to emit this sequential statement! "
<< "type=" << typeid(*this).name() << endl;
return 1;
}
int BasicLoopStatement::emit(ostream&out, Entity*, Architecture*)
{
out << " // " << get_fileline() << ": internal error: "
<< "I don't know how to emit this sequential statement! "
<< "type=" << typeid(*this).name() << endl;
return 1;
}
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