/*

 * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.

 * 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

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 */

#ifndef CPU_X86_VM_REGISTER_X86_HPP

#define CPU_X86_VM_REGISTER_X86_HPP

#include "asm/register.hpp"

#include "vm_version_x86.hpp"

class VMRegImpl;

typedef VMRegImpl* VMReg;

// Use Register as shortcut

class RegisterImpl;

typedef RegisterImpl* Register;

// The implementation of integer registers for the ia32 architecture

inline Register as_Register(int encoding) {

  return (Register)(intptr_t) encoding;

}

class RegisterImpl: public AbstractRegisterImpl {

 public:

  enum {

#ifndef AMD64

    number_of_registers      = 8,

    number_of_byte_registers = 4

#else

    number_of_registers      = 16,

    number_of_byte_registers = 16

#endif // AMD64

  };

  // derived registers, offsets, and addresses

  Register successor() const                          { return as_Register(encoding() + 1); }

  // construction

  inline friend Register as_Register(int encoding);

  VMReg as_VMReg();

  // 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; }

  bool  has_byte_register() const                { return 0 <= (intptr_t)this && (intptr_t)this < number_of_byte_registers; }

  const char* name() const;

};

// The integer registers of the ia32/amd64 architecture

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

CONSTANT_REGISTER_DECLARATION(Register, rax,    (0));

CONSTANT_REGISTER_DECLARATION(Register, rcx,    (1));

CONSTANT_REGISTER_DECLARATION(Register, rdx,    (2));

CONSTANT_REGISTER_DECLARATION(Register, rbx,    (3));

CONSTANT_REGISTER_DECLARATION(Register, rsp,    (4));

CONSTANT_REGISTER_DECLARATION(Register, rbp,    (5));

CONSTANT_REGISTER_DECLARATION(Register, rsi,    (6));

CONSTANT_REGISTER_DECLARATION(Register, rdi,    (7));

#ifdef AMD64

CONSTANT_REGISTER_DECLARATION(Register, r8,     (8));

CONSTANT_REGISTER_DECLARATION(Register, r9,     (9));

CONSTANT_REGISTER_DECLARATION(Register, r10,   (10));

CONSTANT_REGISTER_DECLARATION(Register, r11,   (11));

CONSTANT_REGISTER_DECLARATION(Register, r12,   (12));

CONSTANT_REGISTER_DECLARATION(Register, r13,   (13));

CONSTANT_REGISTER_DECLARATION(Register, r14,   (14));

CONSTANT_REGISTER_DECLARATION(Register, r15,   (15));

#endif // AMD64

// 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 ia32 architecture

class FloatRegisterImpl: public AbstractRegisterImpl {

 public:

  enum {

    number_of_registers = 8

  };

  // 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;

};

// Use XMMRegister as shortcut

class XMMRegisterImpl;

typedef XMMRegisterImpl* XMMRegister;

// Use MMXRegister as shortcut

class MMXRegisterImpl;

typedef MMXRegisterImpl* MMXRegister;

inline XMMRegister as_XMMRegister(int encoding) {

  return (XMMRegister)(intptr_t)encoding;

}

inline MMXRegister as_MMXRegister(int encoding) {

  return (MMXRegister)(intptr_t)encoding;

}

// The implementation of XMM registers for the IA32 architecture

class XMMRegisterImpl: public AbstractRegisterImpl {

 public:

  enum {

#ifndef AMD64

    number_of_registers = 8

#else

    number_of_registers = 16

#endif // AMD64

  };

  // construction

  friend XMMRegister as_XMMRegister(int encoding);

  VMReg as_VMReg();

  // derived registers, offsets, and addresses

  XMMRegister successor() const                          { return as_XMMRegister(encoding() + 1); }

  // accessors

  int   encoding() const                          { assert(is_valid(), err_msg("invalid register (%d)", (int)(intptr_t)this )); return (intptr_t)this; }

  bool  is_valid() const                          { return 0 <= (intptr_t)this && (intptr_t)this < number_of_registers; }

  const char* name() const;

};

// The XMM registers, for P3 and up chips

CONSTANT_REGISTER_DECLARATION(XMMRegister, xnoreg , (-1));

CONSTANT_REGISTER_DECLARATION(XMMRegister, xmm0 , ( 0));

CONSTANT_REGISTER_DECLARATION(XMMRegister, xmm1 , ( 1));

CONSTANT_REGISTER_DECLARATION(XMMRegister, xmm2 , ( 2));

CONSTANT_REGISTER_DECLARATION(XMMRegister, xmm3 , ( 3));

CONSTANT_REGISTER_DECLARATION(XMMRegister, xmm4 , ( 4));

CONSTANT_REGISTER_DECLARATION(XMMRegister, xmm5 , ( 5));

CONSTANT_REGISTER_DECLARATION(XMMRegister, xmm6 , ( 6));

CONSTANT_REGISTER_DECLARATION(XMMRegister, xmm7 , ( 7));

#ifdef AMD64

CONSTANT_REGISTER_DECLARATION(XMMRegister, xmm8,      (8));

CONSTANT_REGISTER_DECLARATION(XMMRegister, xmm9,      (9));

CONSTANT_REGISTER_DECLARATION(XMMRegister, xmm10,    (10));

CONSTANT_REGISTER_DECLARATION(XMMRegister, xmm11,    (11));

CONSTANT_REGISTER_DECLARATION(XMMRegister, xmm12,    (12));

CONSTANT_REGISTER_DECLARATION(XMMRegister, xmm13,    (13));

CONSTANT_REGISTER_DECLARATION(XMMRegister, xmm14,    (14));

CONSTANT_REGISTER_DECLARATION(XMMRegister, xmm15,    (15));

#endif // AMD64

// Only used by the 32bit stubGenerator. These can't be described by vmreg and hence

// can't be described in oopMaps and therefore can't be used by the compilers (at least

// were deopt might wan't to see them).

// The MMX registers, for P3 and up chips

CONSTANT_REGISTER_DECLARATION(MMXRegister, mnoreg , (-1));

CONSTANT_REGISTER_DECLARATION(MMXRegister, mmx0 , ( 0));

CONSTANT_REGISTER_DECLARATION(MMXRegister, mmx1 , ( 1));

CONSTANT_REGISTER_DECLARATION(MMXRegister, mmx2 , ( 2));

CONSTANT_REGISTER_DECLARATION(MMXRegister, mmx3 , ( 3));

CONSTANT_REGISTER_DECLARATION(MMXRegister, mmx4 , ( 4));

CONSTANT_REGISTER_DECLARATION(MMXRegister, mmx5 , ( 5));

CONSTANT_REGISTER_DECLARATION(MMXRegister, mmx6 , ( 6));

CONSTANT_REGISTER_DECLARATION(MMXRegister, mmx7 , ( 7));

// Need to know the total number of registers of all sorts for SharedInfo.

// Define a class that exports it.

class ConcreteRegisterImpl : public AbstractRegisterImpl {

 public:

  enum {

  // A big enough number for C2: all the registers plus flags

  // This number must be large enough to cover REG_COUNT (defined by c2) registers.

  // There is no requirement that any ordering here matches any ordering c2 gives

  // it's optoregs.

    number_of_registers =      RegisterImpl::number_of_registers +

#ifdef AMD64

                               RegisterImpl::number_of_registers +  // "H" half of a 64bit register

#endif // AMD64

                           2 * FloatRegisterImpl::number_of_registers +

                           8 * XMMRegisterImpl::number_of_registers +

                           1 // eflags

  };

  static const int max_gpr;

  static const int max_fpr;

  static const int max_xmm;

};

#endif // CPU_X86_VM_REGISTER_X86_HPP