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/* $Id$
*
* SetParam: Set a parameter in the transfer region.
*
* 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 __SET_PARAM_HPP_INCLUDED
#define __SET_PARAM_HPP_INCLUDED
#include "intermediate/opcodes/OpCode.hpp"
#include "intermediate/operands/Reference.hpp"
namespace intermediate {
//! Copy source to a slot in the transfer region of a container.
/** This opcode will copy source to the transfer slot dst from container
* container into the previously allocated region.
*
* Read Operands: src, cnt, dst
* Write operands: no publicly visible operands.
*
* Operation:
* copy src to the slot defined by cnt/dst.
*
* Errors:
* SetParam must be evaluated after a corresponding BeginTransfer
* statement in the same text segment before a corresponding
* EndTransfer statement.
*
* The Reference to the container must match the Reference to
* BeginTransfer.
*
* Hint: An implementation could allocate space on the stack for
* BeginTransfer (where the size would match the size of the transfer
* statement), SetParam could calculate the relative stack offset
* by cnt/dest to the stack top and EndTransfer could deallocate the
* space on the stack again. So SetParam w.o. BeginTransfer would
* basically corrupt the current stack frame.
*/
class SetParam : public OpCode {
public:
//! c'tor
/** @param source source operand
* @param cnt Reference to the container
* @param dest Reference to item in transfer segment of container.
*/
SetParam(
Operand *source,
Reference *cnt,
Reference *dest
) : src(source),
container(cnt),
dst(dest) {}
//! 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);
}
//! source operand
Operand *src;
//! referenced container
Reference *container;
//! item in transfer segment of referenced container
Reference *dst;
protected:
virtual ~SetParam() {
util::MiscUtil::terminate(this->src);
util::MiscUtil::terminate(this->container);
util::MiscUtil::terminate(this->dst);
}
};
}; /* namespace intermediate */
#endif /* __SET_PARAM_HPP_INCLUDED */
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