/*

 * Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.

 * Copyright 2007 Red Hat, Inc.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#ifndef CPU_ZERO_REGISTER_ZERO_HPP

#define CPU_ZERO_REGISTER_ZERO_HPP

#include "asm/register.hpp"

class VMRegImpl;

typedef VMRegImpl* VMReg;

// Use Register as shortcut

class RegisterImpl;

typedef RegisterImpl* Register;

inline Register as_Register(int encoding) {

  return (Register)(intptr_t) encoding;

}

// The implementation of integer registers for the zero architecture

class RegisterImpl : public AbstractRegisterImpl {

 public:

  enum {

    number_of_registers = 0

  };

  // construction

  inline friend Register as_Register(int encoding);

  VMReg as_VMReg();

  // derived registers, offsets, and addresses

  Register successor() const {

    return as_Register(encoding() + 1);

  }

  // accessors

  int encoding() const {

    assert(is_valid(), "invalid register");

    return (intptr_t)this;

  }

  bool is_valid() const {

    return 0 <= (intptr_t) this && (intptr_t)this < number_of_registers;

  }

  const char* name() const;

};

// Use FloatRegister as shortcut

class FloatRegisterImpl;

typedef FloatRegisterImpl* FloatRegister;

inline FloatRegister as_FloatRegister(int encoding) {

  return (FloatRegister)(intptr_t) encoding;

}

// The implementation of floating point registers for the zero architecture

class FloatRegisterImpl : public AbstractRegisterImpl {

 public:

  enum {

    number_of_registers = 0

  };

  // construction

  inline friend FloatRegister as_FloatRegister(int encoding);

  VMReg as_VMReg();

  // derived registers, offsets, and addresses

  FloatRegister successor() const {

    return as_FloatRegister(encoding() + 1);

  }

  // accessors

  int encoding() const {

    assert(is_valid(), "invalid register");

    return (intptr_t)this;

  }

  bool is_valid() const {

    return 0 <= (intptr_t) this && (intptr_t)this < number_of_registers;

  }

  const char* name() const;

};

class ConcreteRegisterImpl : public AbstractRegisterImpl {

 public:

  enum {

    number_of_registers = RegisterImpl::number_of_registers +

                          FloatRegisterImpl::number_of_registers

  };

  static const int max_gpr;

  static const int max_fpr;

};

CONSTANT_REGISTER_DECLARATION(Register, noreg, (-1));

#ifndef DONT_USE_REGISTER_DEFINES

#define noreg ((Register)(noreg_RegisterEnumValue))

#endif

#endif // CPU_ZERO_REGISTER_ZERO_HPP