src/arch/arm/insts/misc.hh - public/gem5 - Git at Google

 /*
  * Copyright (c) 2010, 2012-2013, 2017-2018 ARM Limited
  * All rights reserved
  *
  * The license below extends only to copyright in the software and shall
  * not be construed as granting a license to any other intellectual
  * property including but not limited to intellectual property relating
  * to a hardware implementation of the functionality of the software
  * licensed hereunder.  You may use the software subject to the license
  * terms below provided that you ensure that this notice is replicated
  * unmodified and in its entirety in all distributions of the software,
  * modified or unmodified, in source code or in binary form.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met: 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 conditions and the following disclaimer in the
  * documentation and/or other materials provided with the distribution;
  * neither the name of the copyright holders nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * 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
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  * Authors: Gabe Black
  */

 #ifndef __ARCH_ARM_INSTS_MISC_HH__
 #define __ARCH_ARM_INSTS_MISC_HH__

 #include "arch/arm/insts/pred_inst.hh"

 class MrsOp : public PredOp
 {
   protected:
     IntRegIndex dest;

     MrsOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
             IntRegIndex _dest) :
         PredOp(mnem, _machInst, __opClass), dest(_dest)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class MsrBase : public PredOp
 {
   protected:
     uint8_t byteMask;

     MsrBase(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
             uint8_t _byteMask) :
         PredOp(mnem, _machInst, __opClass), byteMask(_byteMask)
     {}

     void printMsrBase(std::ostream &os) const;
 };

 class MsrImmOp : public MsrBase
 {
   protected:
     uint32_t imm;

     MsrImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
              uint32_t _imm, uint8_t _byteMask) :
         MsrBase(mnem, _machInst, __opClass, _byteMask), imm(_imm)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class MsrRegOp : public MsrBase
 {
   protected:
     IntRegIndex op1;

     MsrRegOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
              IntRegIndex _op1, uint8_t _byteMask) :
         MsrBase(mnem, _machInst, __opClass, _byteMask), op1(_op1)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class MrrcOp : public PredOp
 {
   protected:
     MiscRegIndex op1;
     IntRegIndex dest;
     IntRegIndex dest2;
     uint32_t    imm;

     MrrcOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
            MiscRegIndex _op1, IntRegIndex _dest, IntRegIndex _dest2,
            uint32_t _imm) :
         PredOp(mnem, _machInst, __opClass), op1(_op1), dest(_dest),
         dest2(_dest2), imm(_imm)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class McrrOp : public PredOp
 {
   protected:
     IntRegIndex op1;
     IntRegIndex op2;
     MiscRegIndex dest;
     uint32_t    imm;

     McrrOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
            IntRegIndex _op1, IntRegIndex _op2, MiscRegIndex _dest,
            uint32_t _imm) :
         PredOp(mnem, _machInst, __opClass), op1(_op1), op2(_op2),
         dest(_dest), imm(_imm)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class ImmOp : public PredOp
 {
   protected:
     uint64_t imm;

     ImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
              uint64_t _imm) :
         PredOp(mnem, _machInst, __opClass), imm(_imm)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class RegImmOp : public PredOp
 {
   protected:
     IntRegIndex dest;
     uint64_t imm;

     RegImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
              IntRegIndex _dest, uint64_t _imm) :
         PredOp(mnem, _machInst, __opClass), dest(_dest), imm(_imm)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class RegRegOp : public PredOp
 {
   protected:
     IntRegIndex dest;
     IntRegIndex op1;

     RegRegOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
              IntRegIndex _dest, IntRegIndex _op1) :
         PredOp(mnem, _machInst, __opClass), dest(_dest), op1(_op1)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class RegImmRegOp : public PredOp
 {
   protected:
     IntRegIndex dest;
     uint64_t imm;
     IntRegIndex op1;

     RegImmRegOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
                 IntRegIndex _dest, uint64_t _imm, IntRegIndex _op1) :
         PredOp(mnem, _machInst, __opClass),
         dest(_dest), imm(_imm), op1(_op1)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class RegRegRegImmOp : public PredOp
 {
   protected:
     IntRegIndex dest;
     IntRegIndex op1;
     IntRegIndex op2;
     uint64_t imm;

     RegRegRegImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
                    IntRegIndex _dest, IntRegIndex _op1, IntRegIndex _op2,
                    uint64_t _imm) :
         PredOp(mnem, _machInst, __opClass),
         dest(_dest), op1(_op1), op2(_op2), imm(_imm)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class RegRegRegRegOp : public PredOp
 {
   protected:
     IntRegIndex dest;
     IntRegIndex op1;
     IntRegIndex op2;
     IntRegIndex op3;

     RegRegRegRegOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
                    IntRegIndex _dest, IntRegIndex _op1,
                    IntRegIndex _op2, IntRegIndex _op3) :
         PredOp(mnem, _machInst, __opClass),
         dest(_dest), op1(_op1), op2(_op2), op3(_op3)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class RegRegRegOp : public PredOp
 {
   protected:
     IntRegIndex dest;
     IntRegIndex op1;
     IntRegIndex op2;

     RegRegRegOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
                 IntRegIndex _dest, IntRegIndex _op1, IntRegIndex _op2) :
         PredOp(mnem, _machInst, __opClass),
         dest(_dest), op1(_op1), op2(_op2)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class RegRegImmOp : public PredOp
 {
   protected:
     IntRegIndex dest;
     IntRegIndex op1;
     uint64_t imm;

     RegRegImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
                 IntRegIndex _dest, IntRegIndex _op1,
                 uint64_t _imm) :
         PredOp(mnem, _machInst, __opClass),
         dest(_dest), op1(_op1), imm(_imm)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class MiscRegRegImmOp : public PredOp
 {
   protected:
     MiscRegIndex dest;
     IntRegIndex op1;
     uint64_t imm;

     MiscRegRegImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
                     MiscRegIndex _dest, IntRegIndex _op1,
                     uint64_t _imm) :
         PredOp(mnem, _machInst, __opClass),
         dest(_dest), op1(_op1), imm(_imm)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class RegMiscRegImmOp : public PredOp
 {
   protected:
     IntRegIndex dest;
     MiscRegIndex op1;
     uint64_t imm;

     RegMiscRegImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
                     IntRegIndex _dest, MiscRegIndex _op1,
                     uint64_t _imm) :
         PredOp(mnem, _machInst, __opClass),
         dest(_dest), op1(_op1), imm(_imm)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class RegImmImmOp : public PredOp
 {
   protected:
     IntRegIndex dest;
     uint64_t imm1;
     uint64_t imm2;

     RegImmImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
                 IntRegIndex _dest, uint64_t _imm1, uint64_t _imm2) :
         PredOp(mnem, _machInst, __opClass),
         dest(_dest), imm1(_imm1), imm2(_imm2)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class RegRegImmImmOp : public PredOp
 {
   protected:
     IntRegIndex dest;
     IntRegIndex op1;
     uint64_t imm1;
     uint64_t imm2;

     RegRegImmImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
                    IntRegIndex _dest, IntRegIndex _op1,
                    uint64_t _imm1, uint64_t _imm2) :
         PredOp(mnem, _machInst, __opClass),
         dest(_dest), op1(_op1), imm1(_imm1), imm2(_imm2)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class RegImmRegShiftOp : public PredOp
 {
   protected:
     IntRegIndex dest;
     uint64_t imm;
     IntRegIndex op1;
     int32_t shiftAmt;
     ArmShiftType shiftType;

     RegImmRegShiftOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
                      IntRegIndex _dest, uint64_t _imm, IntRegIndex _op1,
                      int32_t _shiftAmt, ArmShiftType _shiftType) :
         PredOp(mnem, _machInst, __opClass),
         dest(_dest), imm(_imm), op1(_op1),
         shiftAmt(_shiftAmt), shiftType(_shiftType)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 class UnknownOp : public PredOp
 {
   protected:

     UnknownOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
         PredOp(mnem, _machInst, __opClass)
     {}

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;
 };

 /**
  * Certain mrc/mcr instructions act as nops or flush the pipe based on what
  * register the instruction is trying to access. This inst/class exists so that
  * we can still check for hyp traps, as the normal nop instruction
  * does not.
  */
 class McrMrcMiscInst : public ArmStaticInst
 {
   protected:
     uint64_t iss;
     MiscRegIndex miscReg;

   public:
     McrMrcMiscInst(const char *_mnemonic, ExtMachInst _machInst,
                    uint64_t _iss, MiscRegIndex _miscReg);

     Fault execute(ExecContext *xc,
                   Trace::InstRecord *traceData) const override;

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;

 };

 /**
  * This class is also used for IMPLEMENTATION DEFINED registers, whose mcr/mrc
  * behaviour is trappable even for unimplemented registers.
  */
 class McrMrcImplDefined : public McrMrcMiscInst
 {
   public:
     McrMrcImplDefined(const char *_mnemonic, ExtMachInst _machInst,
                       uint64_t _iss, MiscRegIndex _miscReg);

     Fault execute(ExecContext *xc,
                   Trace::InstRecord *traceData) const override;

     std::string generateDisassembly(
             Addr pc, const SymbolTable *symtab) const override;

 };

 #endif
	/*
	* Copyright (c) 2010, 2012-2013, 2017-2018 ARM Limited
	* All rights reserved
	*
	* The license below extends only to copyright in the software and shall
	* not be construed as granting a license to any other intellectual
	* property including but not limited to intellectual property relating
	* to a hardware implementation of the functionality of the software
	* licensed hereunder. You may use the software subject to the license
	* terms below provided that you ensure that this notice is replicated
	* unmodified and in its entirety in all distributions of the software,
	* modified or unmodified, in source code or in binary form.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are
	* met: 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 conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution;
	* neither the name of the copyright holders nor the names of its
	* contributors may be used to endorse or promote products derived from
	* this software without specific prior written permission.
	*
	* 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
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*
	* Authors: Gabe Black
	*/

	#ifndef __ARCH_ARM_INSTS_MISC_HH__
	#define __ARCH_ARM_INSTS_MISC_HH__

	#include "arch/arm/insts/pred_inst.hh"

	class MrsOp : public PredOp
	{
	protected:
	IntRegIndex dest;

	MrsOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	IntRegIndex _dest) :
	PredOp(mnem, _machInst, __opClass), dest(_dest)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class MsrBase : public PredOp
	{
	protected:
	uint8_t byteMask;

	MsrBase(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	uint8_t _byteMask) :
	PredOp(mnem, _machInst, __opClass), byteMask(_byteMask)
	{}

	void printMsrBase(std::ostream &os) const;
	};

	class MsrImmOp : public MsrBase
	{
	protected:
	uint32_t imm;

	MsrImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	uint32_t _imm, uint8_t _byteMask) :
	MsrBase(mnem, _machInst, __opClass, _byteMask), imm(_imm)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class MsrRegOp : public MsrBase
	{
	protected:
	IntRegIndex op1;

	MsrRegOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	IntRegIndex _op1, uint8_t _byteMask) :
	MsrBase(mnem, _machInst, __opClass, _byteMask), op1(_op1)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class MrrcOp : public PredOp
	{
	protected:
	MiscRegIndex op1;
	IntRegIndex dest;
	IntRegIndex dest2;
	uint32_t imm;

	MrrcOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	MiscRegIndex _op1, IntRegIndex _dest, IntRegIndex _dest2,
	uint32_t _imm) :
	PredOp(mnem, _machInst, __opClass), op1(_op1), dest(_dest),
	dest2(_dest2), imm(_imm)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class McrrOp : public PredOp
	{
	protected:
	IntRegIndex op1;
	IntRegIndex op2;
	MiscRegIndex dest;
	uint32_t imm;

	McrrOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	IntRegIndex _op1, IntRegIndex _op2, MiscRegIndex _dest,
	uint32_t _imm) :
	PredOp(mnem, _machInst, __opClass), op1(_op1), op2(_op2),
	dest(_dest), imm(_imm)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class ImmOp : public PredOp
	{
	protected:
	uint64_t imm;

	ImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	uint64_t _imm) :
	PredOp(mnem, _machInst, __opClass), imm(_imm)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class RegImmOp : public PredOp
	{
	protected:
	IntRegIndex dest;
	uint64_t imm;

	RegImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	IntRegIndex _dest, uint64_t _imm) :
	PredOp(mnem, _machInst, __opClass), dest(_dest), imm(_imm)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class RegRegOp : public PredOp
	{
	protected:
	IntRegIndex dest;
	IntRegIndex op1;

	RegRegOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	IntRegIndex _dest, IntRegIndex _op1) :
	PredOp(mnem, _machInst, __opClass), dest(_dest), op1(_op1)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class RegImmRegOp : public PredOp
	{
	protected:
	IntRegIndex dest;
	uint64_t imm;
	IntRegIndex op1;

	RegImmRegOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	IntRegIndex _dest, uint64_t _imm, IntRegIndex _op1) :
	PredOp(mnem, _machInst, __opClass),
	dest(_dest), imm(_imm), op1(_op1)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class RegRegRegImmOp : public PredOp
	{
	protected:
	IntRegIndex dest;
	IntRegIndex op1;
	IntRegIndex op2;
	uint64_t imm;

	RegRegRegImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	IntRegIndex _dest, IntRegIndex _op1, IntRegIndex _op2,
	uint64_t _imm) :
	PredOp(mnem, _machInst, __opClass),
	dest(_dest), op1(_op1), op2(_op2), imm(_imm)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class RegRegRegRegOp : public PredOp
	{
	protected:
	IntRegIndex dest;
	IntRegIndex op1;
	IntRegIndex op2;
	IntRegIndex op3;

	RegRegRegRegOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	IntRegIndex _dest, IntRegIndex _op1,
	IntRegIndex _op2, IntRegIndex _op3) :
	PredOp(mnem, _machInst, __opClass),
	dest(_dest), op1(_op1), op2(_op2), op3(_op3)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class RegRegRegOp : public PredOp
	{
	protected:
	IntRegIndex dest;
	IntRegIndex op1;
	IntRegIndex op2;

	RegRegRegOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	IntRegIndex _dest, IntRegIndex _op1, IntRegIndex _op2) :
	PredOp(mnem, _machInst, __opClass),
	dest(_dest), op1(_op1), op2(_op2)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class RegRegImmOp : public PredOp
	{
	protected:
	IntRegIndex dest;
	IntRegIndex op1;
	uint64_t imm;

	RegRegImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	IntRegIndex _dest, IntRegIndex _op1,
	uint64_t _imm) :
	PredOp(mnem, _machInst, __opClass),
	dest(_dest), op1(_op1), imm(_imm)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class MiscRegRegImmOp : public PredOp
	{
	protected:
	MiscRegIndex dest;
	IntRegIndex op1;
	uint64_t imm;

	MiscRegRegImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	MiscRegIndex _dest, IntRegIndex _op1,
	uint64_t _imm) :
	PredOp(mnem, _machInst, __opClass),
	dest(_dest), op1(_op1), imm(_imm)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class RegMiscRegImmOp : public PredOp
	{
	protected:
	IntRegIndex dest;
	MiscRegIndex op1;
	uint64_t imm;

	RegMiscRegImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	IntRegIndex _dest, MiscRegIndex _op1,
	uint64_t _imm) :
	PredOp(mnem, _machInst, __opClass),
	dest(_dest), op1(_op1), imm(_imm)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class RegImmImmOp : public PredOp
	{
	protected:
	IntRegIndex dest;
	uint64_t imm1;
	uint64_t imm2;

	RegImmImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	IntRegIndex _dest, uint64_t _imm1, uint64_t _imm2) :
	PredOp(mnem, _machInst, __opClass),
	dest(_dest), imm1(_imm1), imm2(_imm2)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class RegRegImmImmOp : public PredOp
	{
	protected:
	IntRegIndex dest;
	IntRegIndex op1;
	uint64_t imm1;
	uint64_t imm2;

	RegRegImmImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	IntRegIndex _dest, IntRegIndex _op1,
	uint64_t _imm1, uint64_t _imm2) :
	PredOp(mnem, _machInst, __opClass),
	dest(_dest), op1(_op1), imm1(_imm1), imm2(_imm2)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class RegImmRegShiftOp : public PredOp
	{
	protected:
	IntRegIndex dest;
	uint64_t imm;
	IntRegIndex op1;
	int32_t shiftAmt;
	ArmShiftType shiftType;

	RegImmRegShiftOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
	IntRegIndex _dest, uint64_t _imm, IntRegIndex _op1,
	int32_t _shiftAmt, ArmShiftType _shiftType) :
	PredOp(mnem, _machInst, __opClass),
	dest(_dest), imm(_imm), op1(_op1),
	shiftAmt(_shiftAmt), shiftType(_shiftType)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	class UnknownOp : public PredOp
	{
	protected:

	UnknownOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
	PredOp(mnem, _machInst, __opClass)
	{}

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;
	};

	/**
	* Certain mrc/mcr instructions act as nops or flush the pipe based on what
	* register the instruction is trying to access. This inst/class exists so that
	* we can still check for hyp traps, as the normal nop instruction
	* does not.
	*/
	class McrMrcMiscInst : public ArmStaticInst
	{
	protected:
	uint64_t iss;
	MiscRegIndex miscReg;

	public:
	McrMrcMiscInst(const char *_mnemonic, ExtMachInst _machInst,
	uint64_t _iss, MiscRegIndex _miscReg);

	Fault execute(ExecContext *xc,
	Trace::InstRecord *traceData) const override;

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;

	};

	/**
	* This class is also used for IMPLEMENTATION DEFINED registers, whose mcr/mrc
	* behaviour is trappable even for unimplemented registers.
	*/
	class McrMrcImplDefined : public McrMrcMiscInst
	{
	public:
	McrMrcImplDefined(const char *_mnemonic, ExtMachInst _machInst,
	uint64_t _iss, MiscRegIndex _miscReg);

	Fault execute(ExecContext *xc,
	Trace::InstRecord *traceData) const override;

	std::string generateDisassembly(
	Addr pc, const SymbolTable *symtab) const override;

	};

	#endif