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/* $Id$
*
* Sub: substract values. (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 __SUB_HPP_INCLUDED
#define __SUB_HPP_INCLUDED
#include "intermediate/operands/Register.hpp"
namespace intermediate {
//! substract the right operand from the left
/** This class will substract the right operand from the left operand
* and store the result into the dst register.
* In case that left - right is a smaller value, than dst can store,
* the result is undefined.
*
* Read operands left, right.
* Write operands: dst
*
* left operand: Minuend
* right operand: Subtrahend
* dst: destination operand, to which the result will get written (any
* virtual register).
*/
class Sub : public OpCode {
public:
//! c'tor
/** @param l minuend
* @param r subtrahend
* @param destination destination register.
*/
Sub(
Operand *l,
Operand *r,
Register *destination
) : left(l), right(r), dst(destination) {}
//! 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);
}
//! left operand
Operand *left;
//! right operand
Operand *right;
//! destination
Register *dst;
protected:
virtual ~Sub() {
util::MiscUtil::terminate(this->left);
util::MiscUtil::terminate(this->right);
util::MiscUtil::terminate(this->dst);
}
};
}; /* namespace intermediate */
#endif /* __SUB_HPP_INCLUDED */
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