/*
 * Copyright (c) 2007 The Hewlett-Packard Development Company
 * All rights reserved.
 *
 * Redistribution and use of this software in source and binary forms,
 * with or without modification, are permitted provided that the
 * following conditions are met:
 *
 * The software must be used only for Non-Commercial Use which means any
 * use which is NOT directed to receiving any direct monetary
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 * examples of non-commercial use are academic research, personal study,
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 *
 * If you wish to use this software or functionality therein that may be
 * covered by patents for commercial use, please contact:
 *     Director of Intellectual Property Licensing
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 *     Hewlett-Packard Company
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 *
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.  Redistributions
 * in binary form must reproduce the above copyright notice, this list of
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 * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.  No right of
 * sublicense is granted herewith.  Derivatives of the software and
 * output created using the software may be prepared, but only for
 * Non-Commercial Uses.  Derivatives of the software may be shared with
 * others provided: (i) the others agree to abide by the list of
 * conditions herein which includes the Non-Commercial Use restrictions;
 * and (ii) such Derivatives of the software include the above copyright
 * notice to acknowledge the contribution from this software where
 * applicable, this list of conditions and the disclaimer below.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 *
 * Authors: Gabe Black
 */

#ifndef __ARCH_X86_REGISTERS_HH__
#define __ARCH_X86_REGISTERS_HH__

#include "arch/x86/intregs.hh"
#include "arch/x86/max_inst_regs.hh"
#include "arch/x86/miscregs.hh"
#include "arch/x86/x86_traits.hh"

namespace X86ISA
{
using X86ISAInst::MaxInstSrcRegs;
using X86ISAInst::MaxInstDestRegs;
const int NumMiscArchRegs = NUM_MISCREGS;
const int NumMiscRegs = NUM_MISCREGS;

const int NumIntArchRegs = NUM_INTREGS;
const int NumIntRegs =
    NumIntArchRegs + NumMicroIntRegs +
    NumPseudoIntRegs + NumImplicitIntRegs;

//Each 128 bit xmm register is broken into two effective 64 bit registers.
const int NumFloatRegs =
    NumMMXRegs + 2 * NumXMMRegs + NumMicroFpRegs;
const int NumFloatArchRegs = NumFloatRegs + 8;

// These enumerate all the registers for dependence tracking.
enum DependenceTags {
    //There are 16 microcode registers at the moment. This is an
    //unusually large constant to make sure there isn't overflow.
    FP_Base_DepTag = 128,
    Ctrl_Base_DepTag =
        FP_Base_DepTag +
        //mmx/x87 registers
        8 +
        //xmm registers
        16 * 2 +
        //The microcode fp registers
        8 +
        //The indices that are mapped over the fp stack
        8
};

// semantically meaningful register indices
//There is no such register in X86
const int ZeroReg = NUM_INTREGS;
const int StackPointerReg = INTREG_RSP;
//X86 doesn't seem to have a link register
const int ReturnAddressReg = 0;
const int ReturnValueReg = INTREG_RAX;
const int FramePointerReg = INTREG_RBP;

// Some OS syscalls use a second register (rdx) to return a second
// value
const int SyscallPseudoReturnReg = INTREG_RDX;

typedef uint64_t IntReg;
//XXX Should this be a 128 bit structure for XMM memory ops?
typedef uint64_t LargestRead;
typedef uint64_t MiscReg;

//These floating point types are correct for mmx, but not
//technically for x87 (80 bits) or at all for xmm (128 bits)
typedef double FloatReg;
typedef uint64_t FloatRegBits;
typedef union
{
    IntReg intReg;
    FloatReg fpReg;
    MiscReg ctrlReg;
} AnyReg;

typedef uint16_t RegIndex;

}; // namespace X86ISA

#endif // __ARCH_X86_REGFILE_HH__