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/* $Id$
*
* AOffset: Calculate array offsets (intermediate opcode).
*
* Copyright (C) 2008-2009 FAUmachine Team <info@faumachine.org>.
* This program is free software. You can redistribute it and/or modify it
* under the terms of the GNU General Public License, either version 2 of
* the License, or (at your option) any later version. See COPYING.
*/
#ifndef __A_OFFSET_HPP_INCLUDED
#define __A_OFFSET_HPP_INCLUDED
#include <cassert>
#include "intermediate/operands/Register.hpp"
#include "intermediate/container/Type.hpp"
namespace intermediate {
//! Calculate the array offset to a given base pointer and a given type.
/** This class will calculate the array offset for a given base
* pointer and a given type.
*
* Read operands: base, offset,
* Meta information operand: rtype
* Write operands: dst
*
* Operation: dst = b + array offset(rtype[offset])
*/
class AOffset : public OpCode {
public:
//! c'tor
/** @param b base address of the array.
* @param off index offset (0=first elem, 1=second...)
* @param t corresponding type declaration.
* @param destination destination operand
*/
AOffset(
Operand *b,
Operand *off,
Type *t,
Register *destination
) : base(b),
offset(off),
atype(t),
dst(destination) {
assert(b->type == OP_TYPE_POINTER);
assert(off->type == OP_TYPE_INTEGER);
}
//! Accept a Visitor.
/** All intermediate code nodes need to implement this method.
*
* @param v the Visitor that can visit this node.
*/
virtual void accept(Visitor& v) {
v.visit(*this);
}
/** base pointer to array */
Operand *base;
/** integral array position (0=first element, 1=second..) */
Operand *offset;
/** referred array type */
Type *atype;
/** destination operand */
Register *dst;
protected:
virtual ~AOffset() {
util::MiscUtil::terminate(this->base);
util::MiscUtil::terminate(this->offset);
util::MiscUtil::terminate(this->atype);
util::MiscUtil::terminate(this->dst);
}
};
}; /* namespace intermediate */
#endif /* __A_OFFSET_HPP_INCLUDED */
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