109 lines
3.2 KiB
C++
109 lines
3.2 KiB
C++
/*
|
|
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
|
|
*/
|
|
|
|
# include "expression.h"
|
|
# include "architec.h"
|
|
# include <ivl_assert.h>
|
|
|
|
bool Expression::evaluate(ScopeBase*, int64_t&) const
|
|
{
|
|
return false;
|
|
}
|
|
|
|
bool Expression::evaluate(Entity*, Architecture*arc, int64_t&val) const
|
|
{
|
|
return evaluate(arc, val);
|
|
}
|
|
|
|
|
|
bool ExpAttribute::evaluate(ScopeBase*, int64_t&val) const
|
|
{
|
|
/* Special Case: The length attribute can be calculated all
|
|
the down to a literal integer at compile time, and all it
|
|
needs is the type of the base expression. (The base
|
|
expression doesn't even need to be evaluated.) */
|
|
if (name_ == "length") {
|
|
const VType*base_type = base_->peek_type();
|
|
//if (base_type == 0)
|
|
// base_type = base_->probe_type(ent,arc);
|
|
|
|
ivl_assert(*this, base_type);
|
|
|
|
const VTypeArray*arr = dynamic_cast<const VTypeArray*>(base_type);
|
|
if (arr == 0) {
|
|
cerr << get_fileline() << ": error: "
|
|
<< "Cannot apply the 'length attribute to non-array objects"
|
|
<< endl;
|
|
return false;
|
|
}
|
|
|
|
int64_t size = 1;
|
|
for (size_t idx = 0 ; idx < arr->dimensions() ; idx += 1) {
|
|
const VTypeArray::range_t&dim = arr->dimension(idx);
|
|
ivl_assert(*this, ! dim.is_box());
|
|
size *= 1 + labs(dim.msb() - dim.lsb());
|
|
}
|
|
val = size;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool ExpAttribute::evaluate(Entity*, Architecture*arc, int64_t&val) const
|
|
{
|
|
return evaluate(arc, val);
|
|
}
|
|
|
|
bool ExpName::evaluate(ScopeBase*scope, int64_t&val) const
|
|
{
|
|
const VType*type;
|
|
Expression*exp;
|
|
|
|
if (prefix_.get()) {
|
|
cerr << get_fileline() << ": sorry: I don't know how to evaluate ExpName prefix parts." << endl;
|
|
return false;
|
|
}
|
|
|
|
bool rc = scope->find_constant(name_, type, exp);
|
|
if (rc == false)
|
|
return false;
|
|
|
|
return exp->evaluate(scope, val);
|
|
}
|
|
|
|
bool ExpName::evaluate(Entity*ent, Architecture*arc, int64_t&val) const
|
|
{
|
|
if (prefix_.get()) {
|
|
cerr << get_fileline() << ": sorry: I don't know how to evaluate ExpName prefix parts." << endl;
|
|
return false;
|
|
}
|
|
|
|
const InterfacePort*gen = ent->find_generic(name_);
|
|
if (gen) {
|
|
cerr << get_fileline() << ": sorry: I don't necessarily handle generic overrides." << endl;
|
|
|
|
// Evaluate the default expression and use that.
|
|
if (gen->expr)
|
|
return gen->expr->evaluate(ent, arc, val);
|
|
}
|
|
|
|
return evaluate(arc, val);
|
|
}
|