src/cpu/o3/thread_context.hh - public/gem5 - Git at Google

 /*
  * Copyright (c) 2011-2012, 2016-2018 ARM Limited
  * Copyright (c) 2013 Advanced Micro Devices, Inc.
  * 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.
  *
  * Copyright (c) 2004-2006 The Regents of The University of Michigan
  * All rights reserved.
  *
  * 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: Kevin Lim
  */

 #ifndef __CPU_O3_THREAD_CONTEXT_HH__
 #define __CPU_O3_THREAD_CONTEXT_HH__

 #include "config/the_isa.hh"
 #include "cpu/o3/isa_specific.hh"
 #include "cpu/thread_context.hh"

 class EndQuiesceEvent;
 namespace Kernel {
     class Statistics;
 }

 /**
  * Derived ThreadContext class for use with the O3CPU.  It
  * provides the interface for any external objects to access a
  * single thread's state and some general CPU state.  Any time
  * external objects try to update state through this interface,
  * the CPU will create an event to squash all in-flight
  * instructions in order to ensure state is maintained correctly.
  * It must be defined specifically for the O3CPU because
  * not all architectural state is located within the O3ThreadState
  * (such as the commit PC, and registers), and specific actions
  * must be taken when using this interface (such as squashing all
  * in-flight instructions when doing a write to this interface).
  */
 template <class Impl>
 class O3ThreadContext : public ThreadContext
 {
   public:
     typedef typename Impl::O3CPU O3CPU;

    /** Pointer to the CPU. */
     O3CPU *cpu;

     bool
     schedule(PCEvent *e) override
     {
         return thread->pcEventQueue.schedule(e);
     }
     bool
     remove(PCEvent *e) override
     {
         return thread->pcEventQueue.remove(e);
     }

     void
     scheduleInstCountEvent(Event *event, Tick count) override
     {
         thread->comInstEventQueue.schedule(event, count);
     }
     void
     descheduleInstCountEvent(Event *event) override
     {
         thread->comInstEventQueue.deschedule(event);
     }
     Tick
     getCurrentInstCount() override
     {
         return thread->comInstEventQueue.getCurTick();
     }

     /** Pointer to the thread state that this TC corrseponds to. */
     O3ThreadState<Impl> *thread;

     /** Returns a pointer to the ITB. */
     BaseTLB *getITBPtr() override { return cpu->itb; }

     /** Returns a pointer to the DTB. */
     BaseTLB *getDTBPtr() override { return cpu->dtb; }

     CheckerCPU *getCheckerCpuPtr() override { return NULL; }

     BaseISA *
     getIsaPtr() override
     {
         return cpu->isa[thread->threadId()];
     }

     TheISA::Decoder *
     getDecoderPtr() override
     {
         return cpu->fetch.decoder[thread->threadId()];
     }

     /** Returns a pointer to this CPU. */
     BaseCPU *getCpuPtr() override { return cpu; }

     /** Reads this CPU's ID. */
     int cpuId() const override { return cpu->cpuId(); }

     /** Reads this CPU's Socket ID. */
     uint32_t socketId() const override { return cpu->socketId(); }

     ContextID contextId() const override { return thread->contextId(); }

     void setContextId(ContextID id) override { thread->setContextId(id); }

     /** Returns this thread's ID number. */
     int threadId() const override { return thread->threadId(); }
     void setThreadId(int id) override { return thread->setThreadId(id); }

     /** Returns a pointer to the system. */
     System *getSystemPtr() override { return cpu->system; }

     /** Returns a pointer to this thread's kernel statistics. */
     ::Kernel::Statistics *
     getKernelStats() override
     {
         return thread->kernelStats;
     }

     /** Returns a pointer to this thread's process. */
     Process *getProcessPtr() override { return thread->getProcessPtr(); }

     void setProcessPtr(Process *p) override { thread->setProcessPtr(p); }

     PortProxy &getPhysProxy() override { return thread->getPhysProxy(); }

     PortProxy &getVirtProxy() override;

     void
     initMemProxies(ThreadContext *tc) override
     {
         thread->initMemProxies(tc);
     }

     /** Returns this thread's status. */
     Status status() const override { return thread->status(); }

     /** Sets this thread's status. */
     void
     setStatus(Status new_status) override
     {
         thread->setStatus(new_status);
     }

     /** Set the status to Active. */
     void activate() override;

     /** Set the status to Suspended. */
     void suspend() override;

     /** Set the status to Halted. */
     void halt() override;

     /** Dumps the function profiling information.
      * @todo: Implement.
      */
     void dumpFuncProfile() override;

     /** Takes over execution of a thread from another CPU. */
     void takeOverFrom(ThreadContext *old_context) override;

     /** Registers statistics associated with this TC. */
     void regStats(const std::string &name) override;

     /** Reads the last tick that this thread was activated on. */
     Tick readLastActivate() override;
     /** Reads the last tick that this thread was suspended on. */
     Tick readLastSuspend() override;

     /** Clears the function profiling information. */
     void profileClear() override;
     /** Samples the function profiling information. */
     void profileSample() override;

     /** Copies the architectural registers from another TC into this TC. */
     void copyArchRegs(ThreadContext *tc) override;

     /** Resets all architectural registers to 0. */
     void clearArchRegs() override;

     /** Reads an integer register. */
     RegVal
     readReg(RegIndex reg_idx)
     {
         return readIntRegFlat(flattenRegId(RegId(IntRegClass,
                                                  reg_idx)).index());
     }
     RegVal
     readIntReg(RegIndex reg_idx) const override
     {
         return readIntRegFlat(flattenRegId(RegId(IntRegClass,
                                                  reg_idx)).index());
     }

     RegVal
     readFloatReg(RegIndex reg_idx) const override
     {
         return readFloatRegFlat(flattenRegId(RegId(FloatRegClass,
                                              reg_idx)).index());
     }

     const VecRegContainer &
     readVecReg(const RegId& id) const override
     {
         return readVecRegFlat(flattenRegId(id).index());
     }

     /**
      * Read vector register operand for modification, hierarchical indexing.
      */
     VecRegContainer &
     getWritableVecReg(const RegId& id) override
     {
         return getWritableVecRegFlat(flattenRegId(id).index());
     }

     /** Vector Register Lane Interfaces. */
     /** @{ */
     /** Reads source vector 8bit operand. */
     ConstVecLane8
     readVec8BitLaneReg(const RegId& id) const override
     {
         return readVecLaneFlat<uint8_t>(flattenRegId(id).index(),
                     id.elemIndex());
     }

     /** Reads source vector 16bit operand. */
     ConstVecLane16
     readVec16BitLaneReg(const RegId& id) const override
     {
         return readVecLaneFlat<uint16_t>(flattenRegId(id).index(),
                     id.elemIndex());
     }

     /** Reads source vector 32bit operand. */
     ConstVecLane32
     readVec32BitLaneReg(const RegId& id) const override
     {
         return readVecLaneFlat<uint32_t>(flattenRegId(id).index(),
                     id.elemIndex());
     }

     /** Reads source vector 64bit operand. */
     ConstVecLane64
     readVec64BitLaneReg(const RegId& id) const override
     {
         return readVecLaneFlat<uint64_t>(flattenRegId(id).index(),
                     id.elemIndex());
     }

     /** Write a lane of the destination vector register. */
     void
     setVecLane(const RegId& reg,
                const LaneData<LaneSize::Byte>& val) override
     {
         return setVecLaneFlat(flattenRegId(reg).index(), reg.elemIndex(), val);
     }
     void
     setVecLane(const RegId& reg,
                const LaneData<LaneSize::TwoByte>& val) override
     {
         return setVecLaneFlat(flattenRegId(reg).index(), reg.elemIndex(), val);
     }
     void
     setVecLane(const RegId& reg,
                const LaneData<LaneSize::FourByte>& val) override
     {
         return setVecLaneFlat(flattenRegId(reg).index(), reg.elemIndex(), val);
     }
     void
     setVecLane(const RegId& reg,
                const LaneData<LaneSize::EightByte>& val) override
     {
         return setVecLaneFlat(flattenRegId(reg).index(), reg.elemIndex(), val);
     }
     /** @} */

     const VecElem &
     readVecElem(const RegId& reg) const override
     {
         return readVecElemFlat(flattenRegId(reg).index(), reg.elemIndex());
     }

     const VecPredRegContainer &
     readVecPredReg(const RegId& id) const override
     {
         return readVecPredRegFlat(flattenRegId(id).index());
     }

     VecPredRegContainer&
     getWritableVecPredReg(const RegId& id) override
     {
         return getWritableVecPredRegFlat(flattenRegId(id).index());
     }

     RegVal
     readCCReg(RegIndex reg_idx) const override
     {
         return readCCRegFlat(flattenRegId(RegId(CCRegClass,
                                                  reg_idx)).index());
     }

     /** Sets an integer register to a value. */
     void
     setIntReg(RegIndex reg_idx, RegVal val) override
     {
         setIntRegFlat(flattenRegId(RegId(IntRegClass, reg_idx)).index(), val);
     }

     void
     setFloatReg(RegIndex reg_idx, RegVal val) override
     {
         setFloatRegFlat(flattenRegId(RegId(FloatRegClass,
                                            reg_idx)).index(), val);
     }

     void
     setVecReg(const RegId& reg, const VecRegContainer& val) override
     {
         setVecRegFlat(flattenRegId(reg).index(), val);
     }

     void
     setVecElem(const RegId& reg, const VecElem& val) override
     {
         setVecElemFlat(flattenRegId(reg).index(), reg.elemIndex(), val);
     }

     void
     setVecPredReg(const RegId& reg,
                   const VecPredRegContainer& val) override
     {
         setVecPredRegFlat(flattenRegId(reg).index(), val);
     }

     void
     setCCReg(RegIndex reg_idx, RegVal val) override
     {
         setCCRegFlat(flattenRegId(RegId(CCRegClass, reg_idx)).index(), val);
     }

     /** Reads this thread's PC state. */
     TheISA::PCState
     pcState() const override
     {
         return cpu->pcState(thread->threadId());
     }

     /** Sets this thread's PC state. */
     void pcState(const TheISA::PCState &val) override;

     void pcStateNoRecord(const TheISA::PCState &val) override;

     /** Reads this thread's PC. */
     Addr
     instAddr() const override
     {
         return cpu->instAddr(thread->threadId());
     }

     /** Reads this thread's next PC. */
     Addr
     nextInstAddr() const override
     {
         return cpu->nextInstAddr(thread->threadId());
     }

     /** Reads this thread's next PC. */
     MicroPC
     microPC() const override
     {
         return cpu->microPC(thread->threadId());
     }

     /** Reads a miscellaneous register. */
     RegVal
     readMiscRegNoEffect(RegIndex misc_reg) const override
     {
         return cpu->readMiscRegNoEffect(misc_reg, thread->threadId());
     }

     /** Reads a misc. register, including any side-effects the
      * read might have as defined by the architecture. */
     RegVal
     readMiscReg(RegIndex misc_reg) override
     {
         return cpu->readMiscReg(misc_reg, thread->threadId());
     }

     /** Sets a misc. register. */
     void setMiscRegNoEffect(RegIndex misc_reg, RegVal val) override;

     /** Sets a misc. register, including any side-effects the
      * write might have as defined by the architecture. */
     void setMiscReg(RegIndex misc_reg, RegVal val) override;

     RegId flattenRegId(const RegId& regId) const override;

     /** Returns the number of consecutive store conditional failures. */
     // @todo: Figure out where these store cond failures should go.
     unsigned
     readStCondFailures() const override
     {
         return thread->storeCondFailures;
     }

     /** Sets the number of consecutive store conditional failures. */
     void
     setStCondFailures(unsigned sc_failures) override
     {
         thread->storeCondFailures = sc_failures;
     }

     /** Executes a syscall in SE mode. */
     void
     syscall(Fault *fault) override
     {
         return cpu->syscall(thread->threadId(), fault);
     }

     /** Reads the funcExeInst counter. */
     Counter readFuncExeInst() const override { return thread->funcExeInst; }

     /** Returns pointer to the quiesce event. */
     EndQuiesceEvent *
     getQuiesceEvent() override
     {
         return this->thread->quiesceEvent;
     }
     /** check if the cpu is currently in state update mode and squash if not.
      * This function will return true if a trap is pending or if a fault or
      * similar is currently writing to the thread context and doesn't want
      * reset all the state (see noSquashFromTC).
      */
     inline void
     conditionalSquash()
     {
         if (!thread->trapPending && !thread->noSquashFromTC)
             cpu->squashFromTC(thread->threadId());
     }

     RegVal readIntRegFlat(RegIndex idx) const override;
     void setIntRegFlat(RegIndex idx, RegVal val) override;

     RegVal readFloatRegFlat(RegIndex idx) const override;
     void setFloatRegFlat(RegIndex idx, RegVal val) override;

     const VecRegContainer& readVecRegFlat(RegIndex idx) const override;
     /** Read vector register operand for modification, flat indexing. */
     VecRegContainer& getWritableVecRegFlat(RegIndex idx) override;
     void setVecRegFlat(RegIndex idx, const VecRegContainer& val) override;

     template <typename VecElem>
     VecLaneT<VecElem, true>
     readVecLaneFlat(RegIndex idx, int lId) const
     {
         return cpu->template readArchVecLane<VecElem>(idx, lId,
                 thread->threadId());
     }

     template <typename LD>
     void
     setVecLaneFlat(int idx, int lId, const LD& val)
     {
         cpu->template setArchVecLane(idx, lId, thread->threadId(), val);
     }

     const VecElem &readVecElemFlat(RegIndex idx,
                                    const ElemIndex& elemIndex) const override;
     void setVecElemFlat(RegIndex idx, const ElemIndex& elemIdx,
                         const VecElem& val) override;

     const VecPredRegContainer& readVecPredRegFlat(RegIndex idx) const override;
     VecPredRegContainer& getWritableVecPredRegFlat(RegIndex idx) override;
     void setVecPredRegFlat(RegIndex idx,
                            const VecPredRegContainer& val) override;

     RegVal readCCRegFlat(RegIndex idx) const override;
     void setCCRegFlat(RegIndex idx, RegVal val) override;
 };

 #endif
	/*
	* Copyright (c) 2011-2012, 2016-2018 ARM Limited
	* Copyright (c) 2013 Advanced Micro Devices, Inc.
	* 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.
	*
	* Copyright (c) 2004-2006 The Regents of The University of Michigan
	* All rights reserved.
	*
	* 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: Kevin Lim
	*/

	#ifndef __CPU_O3_THREAD_CONTEXT_HH__
	#define __CPU_O3_THREAD_CONTEXT_HH__

	#include "config/the_isa.hh"
	#include "cpu/o3/isa_specific.hh"
	#include "cpu/thread_context.hh"

	class EndQuiesceEvent;
	namespace Kernel {
	class Statistics;
	}

	/**
	* Derived ThreadContext class for use with the O3CPU. It
	* provides the interface for any external objects to access a
	* single thread's state and some general CPU state. Any time
	* external objects try to update state through this interface,
	* the CPU will create an event to squash all in-flight
	* instructions in order to ensure state is maintained correctly.
	* It must be defined specifically for the O3CPU because
	* not all architectural state is located within the O3ThreadState
	* (such as the commit PC, and registers), and specific actions
	* must be taken when using this interface (such as squashing all
	* in-flight instructions when doing a write to this interface).
	*/
	template <class Impl>
	class O3ThreadContext : public ThreadContext
	{
	public:
	typedef typename Impl::O3CPU O3CPU;

	/** Pointer to the CPU. */
	O3CPU *cpu;

	bool
	schedule(PCEvent *e) override
	{
	return thread->pcEventQueue.schedule(e);
	}
	bool
	remove(PCEvent *e) override
	{
	return thread->pcEventQueue.remove(e);
	}

	void
	scheduleInstCountEvent(Event *event, Tick count) override
	{
	thread->comInstEventQueue.schedule(event, count);
	}
	void
	descheduleInstCountEvent(Event *event) override
	{
	thread->comInstEventQueue.deschedule(event);
	}
	Tick
	getCurrentInstCount() override
	{
	return thread->comInstEventQueue.getCurTick();
	}

	/** Pointer to the thread state that this TC corrseponds to. */
	O3ThreadState<Impl> *thread;

	/** Returns a pointer to the ITB. */
	BaseTLB *getITBPtr() override { return cpu->itb; }

	/** Returns a pointer to the DTB. */
	BaseTLB *getDTBPtr() override { return cpu->dtb; }

	CheckerCPU *getCheckerCpuPtr() override { return NULL; }

	BaseISA *
	getIsaPtr() override
	{
	return cpu->isa[thread->threadId()];
	}

	TheISA::Decoder *
	getDecoderPtr() override
	{
	return cpu->fetch.decoder[thread->threadId()];
	}

	/** Returns a pointer to this CPU. */
	BaseCPU *getCpuPtr() override { return cpu; }

	/** Reads this CPU's ID. */
	int cpuId() const override { return cpu->cpuId(); }

	/** Reads this CPU's Socket ID. */
	uint32_t socketId() const override { return cpu->socketId(); }

	ContextID contextId() const override { return thread->contextId(); }

	void setContextId(ContextID id) override { thread->setContextId(id); }

	/** Returns this thread's ID number. */
	int threadId() const override { return thread->threadId(); }
	void setThreadId(int id) override { return thread->setThreadId(id); }

	/** Returns a pointer to the system. */
	System *getSystemPtr() override { return cpu->system; }

	/** Returns a pointer to this thread's kernel statistics. */
	::Kernel::Statistics *
	getKernelStats() override
	{
	return thread->kernelStats;
	}

	/** Returns a pointer to this thread's process. */
	Process *getProcessPtr() override { return thread->getProcessPtr(); }

	void setProcessPtr(Process *p) override { thread->setProcessPtr(p); }

	PortProxy &getPhysProxy() override { return thread->getPhysProxy(); }

	PortProxy &getVirtProxy() override;

	void
	initMemProxies(ThreadContext *tc) override
	{
	thread->initMemProxies(tc);
	}

	/** Returns this thread's status. */
	Status status() const override { return thread->status(); }

	/** Sets this thread's status. */
	void
	setStatus(Status new_status) override
	{
	thread->setStatus(new_status);
	}

	/** Set the status to Active. */
	void activate() override;

	/** Set the status to Suspended. */
	void suspend() override;

	/** Set the status to Halted. */
	void halt() override;

	/** Dumps the function profiling information.
	* @todo: Implement.
	*/
	void dumpFuncProfile() override;

	/** Takes over execution of a thread from another CPU. */
	void takeOverFrom(ThreadContext *old_context) override;

	/** Registers statistics associated with this TC. */
	void regStats(const std::string &name) override;

	/** Reads the last tick that this thread was activated on. */
	Tick readLastActivate() override;
	/** Reads the last tick that this thread was suspended on. */
	Tick readLastSuspend() override;

	/** Clears the function profiling information. */
	void profileClear() override;
	/** Samples the function profiling information. */
	void profileSample() override;

	/** Copies the architectural registers from another TC into this TC. */
	void copyArchRegs(ThreadContext *tc) override;

	/** Resets all architectural registers to 0. */
	void clearArchRegs() override;

	/** Reads an integer register. */
	RegVal
	readReg(RegIndex reg_idx)
	{
	return readIntRegFlat(flattenRegId(RegId(IntRegClass,
	reg_idx)).index());
	}
	RegVal
	readIntReg(RegIndex reg_idx) const override
	{
	return readIntRegFlat(flattenRegId(RegId(IntRegClass,
	reg_idx)).index());
	}

	RegVal
	readFloatReg(RegIndex reg_idx) const override
	{
	return readFloatRegFlat(flattenRegId(RegId(FloatRegClass,
	reg_idx)).index());
	}

	const VecRegContainer &
	readVecReg(const RegId& id) const override
	{
	return readVecRegFlat(flattenRegId(id).index());
	}

	/**
	* Read vector register operand for modification, hierarchical indexing.
	*/
	VecRegContainer &
	getWritableVecReg(const RegId& id) override
	{
	return getWritableVecRegFlat(flattenRegId(id).index());
	}

	/** Vector Register Lane Interfaces. */
	/** @{ */
	/** Reads source vector 8bit operand. */
	ConstVecLane8
	readVec8BitLaneReg(const RegId& id) const override
	{
	return readVecLaneFlat<uint8_t>(flattenRegId(id).index(),
	id.elemIndex());
	}

	/** Reads source vector 16bit operand. */
	ConstVecLane16
	readVec16BitLaneReg(const RegId& id) const override
	{
	return readVecLaneFlat<uint16_t>(flattenRegId(id).index(),
	id.elemIndex());
	}

	/** Reads source vector 32bit operand. */
	ConstVecLane32
	readVec32BitLaneReg(const RegId& id) const override
	{
	return readVecLaneFlat<uint32_t>(flattenRegId(id).index(),
	id.elemIndex());
	}

	/** Reads source vector 64bit operand. */
	ConstVecLane64
	readVec64BitLaneReg(const RegId& id) const override
	{
	return readVecLaneFlat<uint64_t>(flattenRegId(id).index(),
	id.elemIndex());
	}

	/** Write a lane of the destination vector register. */
	void
	setVecLane(const RegId& reg,
	const LaneData<LaneSize::Byte>& val) override
	{
	return setVecLaneFlat(flattenRegId(reg).index(), reg.elemIndex(), val);
	}
	void
	setVecLane(const RegId& reg,
	const LaneData<LaneSize::TwoByte>& val) override
	{
	return setVecLaneFlat(flattenRegId(reg).index(), reg.elemIndex(), val);
	}
	void
	setVecLane(const RegId& reg,
	const LaneData<LaneSize::FourByte>& val) override
	{
	return setVecLaneFlat(flattenRegId(reg).index(), reg.elemIndex(), val);
	}
	void
	setVecLane(const RegId& reg,
	const LaneData<LaneSize::EightByte>& val) override
	{
	return setVecLaneFlat(flattenRegId(reg).index(), reg.elemIndex(), val);
	}
	/** @} */

	const VecElem &
	readVecElem(const RegId& reg) const override
	{
	return readVecElemFlat(flattenRegId(reg).index(), reg.elemIndex());
	}

	const VecPredRegContainer &
	readVecPredReg(const RegId& id) const override
	{
	return readVecPredRegFlat(flattenRegId(id).index());
	}

	VecPredRegContainer&
	getWritableVecPredReg(const RegId& id) override
	{
	return getWritableVecPredRegFlat(flattenRegId(id).index());
	}

	RegVal
	readCCReg(RegIndex reg_idx) const override
	{
	return readCCRegFlat(flattenRegId(RegId(CCRegClass,
	reg_idx)).index());
	}

	/** Sets an integer register to a value. */
	void
	setIntReg(RegIndex reg_idx, RegVal val) override
	{
	setIntRegFlat(flattenRegId(RegId(IntRegClass, reg_idx)).index(), val);
	}

	void
	setFloatReg(RegIndex reg_idx, RegVal val) override
	{
	setFloatRegFlat(flattenRegId(RegId(FloatRegClass,
	reg_idx)).index(), val);
	}

	void
	setVecReg(const RegId& reg, const VecRegContainer& val) override
	{
	setVecRegFlat(flattenRegId(reg).index(), val);
	}

	void
	setVecElem(const RegId& reg, const VecElem& val) override
	{
	setVecElemFlat(flattenRegId(reg).index(), reg.elemIndex(), val);
	}

	void
	setVecPredReg(const RegId& reg,
	const VecPredRegContainer& val) override
	{
	setVecPredRegFlat(flattenRegId(reg).index(), val);
	}

	void
	setCCReg(RegIndex reg_idx, RegVal val) override
	{
	setCCRegFlat(flattenRegId(RegId(CCRegClass, reg_idx)).index(), val);
	}

	/** Reads this thread's PC state. */
	TheISA::PCState
	pcState() const override
	{
	return cpu->pcState(thread->threadId());
	}

	/** Sets this thread's PC state. */
	void pcState(const TheISA::PCState &val) override;

	void pcStateNoRecord(const TheISA::PCState &val) override;

	/** Reads this thread's PC. */
	Addr
	instAddr() const override
	{
	return cpu->instAddr(thread->threadId());
	}

	/** Reads this thread's next PC. */
	Addr
	nextInstAddr() const override
	{
	return cpu->nextInstAddr(thread->threadId());
	}

	/** Reads this thread's next PC. */
	MicroPC
	microPC() const override
	{
	return cpu->microPC(thread->threadId());
	}

	/** Reads a miscellaneous register. */
	RegVal
	readMiscRegNoEffect(RegIndex misc_reg) const override
	{
	return cpu->readMiscRegNoEffect(misc_reg, thread->threadId());
	}

	/** Reads a misc. register, including any side-effects the
	* read might have as defined by the architecture. */
	RegVal
	readMiscReg(RegIndex misc_reg) override
	{
	return cpu->readMiscReg(misc_reg, thread->threadId());
	}

	/** Sets a misc. register. */
	void setMiscRegNoEffect(RegIndex misc_reg, RegVal val) override;

	/** Sets a misc. register, including any side-effects the
	* write might have as defined by the architecture. */
	void setMiscReg(RegIndex misc_reg, RegVal val) override;

	RegId flattenRegId(const RegId& regId) const override;

	/** Returns the number of consecutive store conditional failures. */
	// @todo: Figure out where these store cond failures should go.
	unsigned
	readStCondFailures() const override
	{
	return thread->storeCondFailures;
	}

	/** Sets the number of consecutive store conditional failures. */
	void
	setStCondFailures(unsigned sc_failures) override
	{
	thread->storeCondFailures = sc_failures;
	}

	/** Executes a syscall in SE mode. */
	void
	syscall(Fault *fault) override
	{
	return cpu->syscall(thread->threadId(), fault);
	}

	/** Reads the funcExeInst counter. */
	Counter readFuncExeInst() const override { return thread->funcExeInst; }

	/** Returns pointer to the quiesce event. */
	EndQuiesceEvent *
	getQuiesceEvent() override
	{
	return this->thread->quiesceEvent;
	}
	/** check if the cpu is currently in state update mode and squash if not.
	* This function will return true if a trap is pending or if a fault or
	* similar is currently writing to the thread context and doesn't want
	* reset all the state (see noSquashFromTC).
	*/
	inline void
	conditionalSquash()
	{
	if (!thread->trapPending && !thread->noSquashFromTC)
	cpu->squashFromTC(thread->threadId());
	}

	RegVal readIntRegFlat(RegIndex idx) const override;
	void setIntRegFlat(RegIndex idx, RegVal val) override;

	RegVal readFloatRegFlat(RegIndex idx) const override;
	void setFloatRegFlat(RegIndex idx, RegVal val) override;

	const VecRegContainer& readVecRegFlat(RegIndex idx) const override;
	/** Read vector register operand for modification, flat indexing. */
	VecRegContainer& getWritableVecRegFlat(RegIndex idx) override;
	void setVecRegFlat(RegIndex idx, const VecRegContainer& val) override;

	template <typename VecElem>
	VecLaneT<VecElem, true>
	readVecLaneFlat(RegIndex idx, int lId) const
	{
	return cpu->template readArchVecLane<VecElem>(idx, lId,
	thread->threadId());
	}

	template <typename LD>
	void
	setVecLaneFlat(int idx, int lId, const LD& val)
	{
	cpu->template setArchVecLane(idx, lId, thread->threadId(), val);
	}

	const VecElem &readVecElemFlat(RegIndex idx,
	const ElemIndex& elemIndex) const override;
	void setVecElemFlat(RegIndex idx, const ElemIndex& elemIdx,
	const VecElem& val) override;

	const VecPredRegContainer& readVecPredRegFlat(RegIndex idx) const override;
	VecPredRegContainer& getWritableVecPredRegFlat(RegIndex idx) override;
	void setVecPredRegFlat(RegIndex idx,
	const VecPredRegContainer& val) override;

	RegVal readCCRegFlat(RegIndex idx) const override;
	void setCCRegFlat(RegIndex idx, RegVal val) override;
	};

	#endif