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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QV4REGISTERINFO_P_H
#define QV4REGISTERINFO_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtCore/QString>
QT_BEGIN_NAMESPACE
namespace QV4 {
namespace JIT {
class RegisterInfo
{
public:
enum { InvalidRegister = (1 << 29) - 1 };
enum SavedBy { CallerSaved, CalleeSaved };
enum RegisterType { RegularRegister, FloatingPointRegister };
enum Usage { Predefined, RegAlloc };
public:
RegisterInfo()
: _savedBy(CallerSaved)
, _usage(Predefined)
, _type(RegularRegister)
, _reg(InvalidRegister)
{}
RegisterInfo(int reg, const QString &prettyName, RegisterType type, SavedBy savedBy, Usage usage)
: _prettyName(prettyName)
, _savedBy(savedBy)
, _usage(usage)
, _type(type)
, _reg(reg)
{}
bool operator==(const RegisterInfo &other) const
{ return _type == other._type && _reg == other._reg; }
bool isValid() const { return _reg != InvalidRegister; }
template <typename T> T reg() const { return static_cast<T>(_reg); }
QString prettyName() const { return _prettyName; }
bool isCallerSaved() const { return _savedBy == CallerSaved; }
bool isCalleeSaved() const { return _savedBy == CalleeSaved; }
bool isFloatingPoint() const { return _type == FloatingPointRegister; }
bool isRegularRegister() const { return _type == RegularRegister; }
bool useForRegAlloc() const { return _usage == RegAlloc; }
bool isPredefined() const { return _usage == Predefined; }
private:
QString _prettyName;
unsigned _savedBy : 1;
unsigned _usage : 1;
unsigned _type : 1;
unsigned _reg : 29;
};
typedef QVector<RegisterInfo> RegisterInformation;
} // JIT namespace
} // QV4 namespace
QT_END_NAMESPACE
#endif // QV4REGISTERINFO_P_H
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