base_dyn_inst.hh

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 * Copyright (c) 2013 Advanced Micro Devices, Inc.
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#ifndef __CPU_BASE_DYN_INST_HH__
#define __CPU_BASE_DYN_INST_HH__
 
#include <algorithm>
#include <array>
#include <bitset>
#include <deque>
#include <list>
#include <string>
 
#include "arch/generic/tlb.hh"
#include "arch/utility.hh"
#include "base/trace.hh"
#include "config/the_isa.hh"
#include "cpu/checker/cpu.hh"
#include "cpu/exec_context.hh"
#include "cpu/exetrace.hh"
#include "cpu/inst_res.hh"
#include "cpu/inst_seq.hh"
#include "cpu/op_class.hh"
#include "cpu/static_inst.hh"
#include "cpu/translation.hh"
#include "debug/HtmCpu.hh"
#include "mem/packet.hh"
#include "mem/request.hh"
#include "sim/byteswap.hh"
#include "sim/system.hh"
 
template <class Impl>
class BaseDynInst : public ExecContext, public RefCounted
{
  public:
    // Typedef for the CPU.
    typedef typename Impl::CPUType ImplCPU;
    typedef typename ImplCPU::ImplState ImplState;
 
    using LSQRequestPtr = typename Impl::CPUPol::LSQ::LSQRequest*;
    using LQIterator = typename Impl::CPUPol::LSQUnit::LQIterator;
    using SQIterator = typename Impl::CPUPol::LSQUnit::SQIterator;
 
    // The DynInstPtr type.
    typedef typename Impl::DynInstPtr DynInstPtr;
    typedef RefCountingPtr<BaseDynInst<Impl> > BaseDynInstPtr;
 
    // The list of instructions iterator type.
    typedef typename std::list<DynInstPtr>::iterator ListIt;
 
  protected:
    enum Status {
        IqEntry,                 
        RobEntry,                
        LsqEntry,                
        Completed,               
        ResultReady,             
        CanIssue,                
        Issued,                  
        Executed,                
        CanCommit,               
        AtCommit,                
        Committed,               
        Squashed,                
        SquashedInIQ,            
        SquashedInLSQ,           
        SquashedInROB,           
        PinnedRegsRenamed,       
        PinnedRegsWritten,       
        PinnedRegsSquashDone,    
        RecoverInst,             
        BlockingInst,            
        ThreadsyncWait,          
        SerializeBefore,         
        SerializeAfter,          
        SerializeHandled,        
        NumStatus
    };
 
    enum Flags {
        NotAnInst,
        TranslationStarted,
        TranslationCompleted,
        PossibleLoadViolation,
        HitExternalSnoop,
        EffAddrValid,
        RecordResult,
        Predicate,
        MemAccPredicate,
        PredTaken,
        IsStrictlyOrdered,
        ReqMade,
        MemOpDone,
        HtmFromTransaction,
        MaxFlags
    };
 
  public:
    InstSeqNum seqNum;
 
    const StaticInstPtr staticInst;
 
    ImplCPU *cpu;
 
    BaseCPU *getCpuPtr() { return cpu; }
 
    ImplState *thread;
 
    Fault fault;
 
    Trace::InstRecord *traceData;
 
  protected:
    std::queue<InstResult> instResult;
 
    TheISA::PCState pc;
 
  private:
    /* An amalgamation of a lot of boolean values into one */
    std::bitset<MaxFlags> instFlags;
 
    std::bitset<NumStatus> status;
 
  protected:
    struct Regs
    {
      private:
        size_t _numSrcs;
        size_t _numDests;
 
        size_t srcsReady = 0;
 
        using BackingStorePtr = std::unique_ptr<uint8_t[]>;
        using BufCursor = BackingStorePtr::pointer;
 
        BackingStorePtr buf;
 
        // Members should be ordered based on required alignment so that they
        // can be allocated contiguously.
 
        // Flattened register index of the destination registers of this
        // instruction.
        RegId *_flatDestIdx;
 
        // Physical register index of the destination registers of this
        // instruction.
        PhysRegIdPtr *_destIdx;
 
        // Physical register index of the previous producers of the
        // architected destinations.
        PhysRegIdPtr *_prevDestIdx;
 
        static inline size_t
        bytesForDests(size_t num)
        {
            return (sizeof(RegId) + 2 * sizeof(PhysRegIdPtr)) * num;
        }
 
        // Physical register index of the source registers of this instruction.
        PhysRegIdPtr *_srcIdx;
 
        // Whether or not the source register is ready, one bit per register.
        uint8_t *_readySrcIdx;
 
        static inline size_t
        bytesForSources(size_t num)
        {
            return sizeof(PhysRegIdPtr) * num +
                sizeof(uint8_t) * ((num + 7) / 8);
        }
 
        template <class T>
        static inline void
        allocate(T *&ptr, BufCursor &cur, size_t count)
        {
            ptr = new (cur) T[count];
            cur += sizeof(T) * count;
        }
 
      public:
        size_t numSrcs() const { return _numSrcs; }
        size_t numDests() const { return _numDests; }
 
        void
        init()
        {
            std::fill(_readySrcIdx, _readySrcIdx + (numSrcs() + 7) / 8, 0);
        }
 
        Regs(size_t srcs, size_t dests) : _numSrcs(srcs), _numDests(dests),
            buf(new uint8_t[bytesForSources(srcs) + bytesForDests(dests)])
        {
            BufCursor cur = buf.get();
            allocate(_flatDestIdx, cur, dests);
            allocate(_destIdx, cur, dests);
            allocate(_prevDestIdx, cur, dests);
            allocate(_srcIdx, cur, srcs);
            allocate(_readySrcIdx, cur, (srcs + 7) / 8);
 
            init();
        }
 
        // Returns the flattened register index of the idx'th destination
        // register.
        const RegId &
        flattenedDestIdx(int idx) const
        {
            return _flatDestIdx[idx];
        }
 
        // Flattens a destination architectural register index into a logical
        // index.
        void
        flattenedDestIdx(int idx, const RegId &reg_id)
        {
            _flatDestIdx[idx] = reg_id;
        }
 
        // Returns the physical register index of the idx'th destination
        // register.
        PhysRegIdPtr
        renamedDestIdx(int idx) const
        {
            return _destIdx[idx];
        }
 
        // Set the renamed dest register id.
        void
        renamedDestIdx(int idx, PhysRegIdPtr phys_reg_id)
        {
            _destIdx[idx] = phys_reg_id;
        }
 
        // Returns the physical register index of the previous physical
        // register that remapped to the same logical register index.
        PhysRegIdPtr
        prevDestIdx(int idx) const
        {
            return _prevDestIdx[idx];
        }
 
        // Set the previous renamed dest register id.
        void
        prevDestIdx(int idx, PhysRegIdPtr phys_reg_id)
        {
            _prevDestIdx[idx] = phys_reg_id;
        }
 
        // Returns the physical register index of the i'th source register.
        PhysRegIdPtr
        renamedSrcIdx(int idx) const
        {
            return _srcIdx[idx];
        }
 
        void
        renamedSrcIdx(int idx, PhysRegIdPtr phys_reg_id)
        {
            _srcIdx[idx] = phys_reg_id;
        }
 
        bool
        readySrcIdx(int idx) const
        {
            uint8_t &byte = _readySrcIdx[idx / 8];
            return bits(byte, idx % 8);
        }
 
        void
        readySrcIdx(int idx, bool ready)
        {
            uint8_t &byte = _readySrcIdx[idx / 8];
            replaceBits(byte, idx % 8, ready ? 1 : 0);
        }
    };
 
  public:
    Regs regs;
 
    ThreadID threadNumber;
 
    ListIt instListIt;
 
 
    TheISA::PCState predPC;
 
    const StaticInstPtr macroop;
 
    uint8_t readyRegs;
 
  public:
 
    Addr effAddr;
 
    Addr physEffAddr;
 
    unsigned memReqFlags;
 
    unsigned effSize;
 
    uint8_t *memData;
 
    ssize_t lqIdx;
    LQIterator lqIt;
 
    ssize_t sqIdx;
    SQIterator sqIt;
 
 
 
    LSQRequestPtr savedReq;
 
    // Need a copy of main request pointer to verify on writes.
    RequestPtr reqToVerify;
 
  private:
    // hardware transactional memory
    uint64_t htmUid;
    uint64_t htmDepth;
 
  public:
    void recordResult(bool f) { instFlags[RecordResult] = f; }
 
    bool effAddrValid() const { return instFlags[EffAddrValid]; }
    void effAddrValid(bool b) { instFlags[EffAddrValid] = b; }
 
    bool memOpDone() const { return instFlags[MemOpDone]; }
    void memOpDone(bool f) { instFlags[MemOpDone] = f; }
 
    bool notAnInst() const { return instFlags[NotAnInst]; }
    void setNotAnInst() { instFlags[NotAnInst] = true; }
 
 
    //
    // INSTRUCTION EXECUTION
    //
 
    void
    demapPage(Addr vaddr, uint64_t asn) override
    {
        cpu->demapPage(vaddr, asn);
    }
 
    Fault initiateMemRead(Addr addr, unsigned size, Request::Flags flags,
            const std::vector<bool> &byte_enable) override;
 
    Fault initiateHtmCmd(Request::Flags flags) override;
 
    Fault writeMem(uint8_t *data, unsigned size, Addr addr,
                   Request::Flags flags, uint64_t *res,
                   const std::vector<bool> &byte_enable) override;
 
    Fault initiateMemAMO(Addr addr, unsigned size, Request::Flags flags,
                         AtomicOpFunctorPtr amo_op) override;
 
    bool translationStarted() const { return instFlags[TranslationStarted]; }
    void translationStarted(bool f) { instFlags[TranslationStarted] = f; }
 
    bool translationCompleted() const { return instFlags[TranslationCompleted]; }
    void translationCompleted(bool f) { instFlags[TranslationCompleted] = f; }
 
    bool
    possibleLoadViolation() const
    {
        return instFlags[PossibleLoadViolation];
    }
    void
    possibleLoadViolation(bool f)
    {
        instFlags[PossibleLoadViolation] = f;
    }
 
    bool hitExternalSnoop() const { return instFlags[HitExternalSnoop]; }
    void hitExternalSnoop(bool f) { instFlags[HitExternalSnoop] = f; }
 
    bool
    isTranslationDelayed() const
    {
        return (translationStarted() && !translationCompleted());
    }
 
  public:
#ifdef DEBUG
    void dumpSNList();
#endif
 
    void
    renameDestReg(int idx, PhysRegIdPtr renamed_dest,
                  PhysRegIdPtr previous_rename)
    {
        regs.renamedDestIdx(idx, renamed_dest);
        regs.prevDestIdx(idx, previous_rename);
        if (renamed_dest->isPinned())
            setPinnedRegsRenamed();
    }
 
    void
    renameSrcReg(int idx, PhysRegIdPtr renamed_src)
    {
        regs.renamedSrcIdx(idx, renamed_src);
    }
 
    BaseDynInst(const StaticInstPtr &staticInst, const StaticInstPtr &macroop,
                TheISA::PCState pc, TheISA::PCState predPC,
                InstSeqNum seq_num, ImplCPU *cpu);
 
    BaseDynInst(const StaticInstPtr &staticInst, const StaticInstPtr &macroop);
 
    ~BaseDynInst();
 
  private:
    void initVars();
 
  public:
    void dump();
 
    void dump(std::string &outstring);
 
    int cpuId() const { return cpu->cpuId(); }
 
    uint32_t socketId() const { return cpu->socketId(); }
 
    RequestorID requestorId() const { return cpu->dataRequestorId(); }
 
    ContextID contextId() const { return thread->contextId(); }
 
    Fault getFault() const { return fault; }
    Fault& getFault() { return fault; }
 
    bool doneTargCalc() { return false; }
 
    void setPredTarg(const TheISA::PCState &_predPC) { predPC = _predPC; }
 
    const TheISA::PCState &readPredTarg() { return predPC; }
 
    Addr predInstAddr() { return predPC.instAddr(); }
 
    Addr predNextInstAddr() { return predPC.nextInstAddr(); }
 
    Addr predMicroPC() { return predPC.microPC(); }
 
    bool readPredTaken() { return instFlags[PredTaken]; }
 
    void
    setPredTaken(bool predicted_taken)
    {
        instFlags[PredTaken] = predicted_taken;
    }
 
    bool
    mispredicted()
    {
        TheISA::PCState tempPC = pc;
        TheISA::advancePC(tempPC, staticInst);
        return !(tempPC == predPC);
    }
 
    //
    //  Instruction types.  Forward checks to StaticInst object.
    //
    bool isNop()          const { return staticInst->isNop(); }
    bool isMemRef()       const { return staticInst->isMemRef(); }
    bool isLoad()         const { return staticInst->isLoad(); }
    bool isStore()        const { return staticInst->isStore(); }
    bool isAtomic()       const { return staticInst->isAtomic(); }
    bool isStoreConditional() const
    { return staticInst->isStoreConditional(); }
    bool isInstPrefetch() const { return staticInst->isInstPrefetch(); }
    bool isDataPrefetch() const { return staticInst->isDataPrefetch(); }
    bool isInteger()      const { return staticInst->isInteger(); }
    bool isFloating()     const { return staticInst->isFloating(); }
    bool isVector()       const { return staticInst->isVector(); }
    bool isControl()      const { return staticInst->isControl(); }
    bool isCall()         const { return staticInst->isCall(); }
    bool isReturn()       const { return staticInst->isReturn(); }
    bool isDirectCtrl()   const { return staticInst->isDirectCtrl(); }
    bool isIndirectCtrl() const { return staticInst->isIndirectCtrl(); }
    bool isCondCtrl()     const { return staticInst->isCondCtrl(); }
    bool isUncondCtrl()   const { return staticInst->isUncondCtrl(); }
    bool isSerializing()  const { return staticInst->isSerializing(); }
    bool
    isSerializeBefore() const
    {
        return staticInst->isSerializeBefore() || status[SerializeBefore];
    }
    bool
    isSerializeAfter() const
    {
        return staticInst->isSerializeAfter() || status[SerializeAfter];
    }
    bool isSquashAfter() const { return staticInst->isSquashAfter(); }
    bool isFullMemBarrier()   const { return staticInst->isFullMemBarrier(); }
    bool isReadBarrier() const { return staticInst->isReadBarrier(); }
    bool isWriteBarrier() const { return staticInst->isWriteBarrier(); }
    bool isNonSpeculative() const { return staticInst->isNonSpeculative(); }
    bool isQuiesce() const { return staticInst->isQuiesce(); }
    bool isUnverifiable() const { return staticInst->isUnverifiable(); }
    bool isSyscall() const { return staticInst->isSyscall(); }
    bool isMacroop() const { return staticInst->isMacroop(); }
    bool isMicroop() const { return staticInst->isMicroop(); }
    bool isDelayedCommit() const { return staticInst->isDelayedCommit(); }
    bool isLastMicroop() const { return staticInst->isLastMicroop(); }
    bool isFirstMicroop() const { return staticInst->isFirstMicroop(); }
    // hardware transactional memory
    bool isHtmStart() const { return staticInst->isHtmStart(); }
    bool isHtmStop() const { return staticInst->isHtmStop(); }
    bool isHtmCancel() const { return staticInst->isHtmCancel(); }
    bool isHtmCmd() const { return staticInst->isHtmCmd(); }
 
    uint64_t
    getHtmTransactionUid() const override
    {
        assert(instFlags[HtmFromTransaction]);
        return this->htmUid;
    }
 
    uint64_t
    newHtmTransactionUid() const override
    {
        panic("Not yet implemented\n");
        return 0;
    }
 
    bool
    inHtmTransactionalState() const override
    {
        return instFlags[HtmFromTransaction];
    }
 
    uint64_t
    getHtmTransactionalDepth() const override
    {
        if (inHtmTransactionalState())
            return this->htmDepth;
        else
            return 0;
    }
 
    void
    setHtmTransactionalState(uint64_t htm_uid, uint64_t htm_depth)
    {
        instFlags.set(HtmFromTransaction);
        htmUid = htm_uid;
        htmDepth = htm_depth;
    }
 
    void
    clearHtmTransactionalState()
    {
        if (inHtmTransactionalState()) {
            DPRINTF(HtmCpu,
                "clearing instuction's transactional state htmUid=%u\n",
                getHtmTransactionUid());
 
            instFlags.reset(HtmFromTransaction);
            htmUid = -1;
            htmDepth = 0;
        }
    }
 
    void setSerializeBefore() { status.set(SerializeBefore); }
 
    void clearSerializeBefore() { status.reset(SerializeBefore); }
 
    bool isTempSerializeBefore() { return status[SerializeBefore]; }
 
    void setSerializeAfter() { status.set(SerializeAfter); }
 
    void clearSerializeAfter() { status.reset(SerializeAfter); }
 
    bool isTempSerializeAfter() { return status[SerializeAfter]; }
 
    void setSerializeHandled() { status.set(SerializeHandled); }
 
    bool isSerializeHandled() { return status[SerializeHandled]; }
 
    OpClass opClass() const { return staticInst->opClass(); }
 
    TheISA::PCState branchTarget() const
    { return staticInst->branchTarget(pc); }
 
    size_t numSrcRegs() const { return regs.numSrcs(); }
 
    size_t numDestRegs() const { return regs.numDests(); }
 
    // the following are used to track physical register usage
    // for machines with separate int & FP reg files
    int8_t numFPDestRegs()  const { return staticInst->numFPDestRegs(); }
    int8_t numIntDestRegs() const { return staticInst->numIntDestRegs(); }
    int8_t numCCDestRegs() const { return staticInst->numCCDestRegs(); }
    int8_t numVecDestRegs() const { return staticInst->numVecDestRegs(); }
    int8_t
    numVecElemDestRegs() const
    {
        return staticInst->numVecElemDestRegs();
    }
    int8_t
    numVecPredDestRegs() const
    {
        return staticInst->numVecPredDestRegs();
    }
 
    const RegId& destRegIdx(int i) const { return staticInst->destRegIdx(i); }
 
    const RegId& srcRegIdx(int i) const { return staticInst->srcRegIdx(i); }
 
    uint8_t resultSize() { return instResult.size(); }
 
    InstResult
    popResult(InstResult dflt=InstResult())
    {
        if (!instResult.empty()) {
            InstResult t = instResult.front();
            instResult.pop();
            return t;
        }
        return dflt;
    }
 
    template<typename T>
    void
    setScalarResult(T &&t)
    {
        if (instFlags[RecordResult]) {
            instResult.push(InstResult(std::forward<T>(t),
                        InstResult::ResultType::Scalar));
        }
    }
 
    template<typename T>
    void
    setVecResult(T &&t)
    {
        if (instFlags[RecordResult]) {
            instResult.push(InstResult(std::forward<T>(t),
                        InstResult::ResultType::VecReg));
        }
    }
 
    template<typename T>
    void
    setVecElemResult(T &&t)
    {
        if (instFlags[RecordResult]) {
            instResult.push(InstResult(std::forward<T>(t),
                        InstResult::ResultType::VecElem));
        }
    }
 
    template<typename T>
    void
    setVecPredResult(T &&t)
    {
        if (instFlags[RecordResult]) {
            instResult.push(InstResult(std::forward<T>(t),
                            InstResult::ResultType::VecPredReg));
        }
    }
    void
    setIntRegOperand(const StaticInst *si, int idx, RegVal val) override
    {
        setScalarResult(val);
    }
 
    void
    setCCRegOperand(const StaticInst *si, int idx, RegVal val) override
    {
        setScalarResult(val);
    }
 
    void
    setVecRegOperand(const StaticInst *si, int idx,
                     const TheISA::VecRegContainer &val) override
    {
        setVecResult(val);
    }
 
    void
    setFloatRegOperandBits(const StaticInst *si, int idx, RegVal val) override
    {
        setScalarResult(val);
    }
 
    void
    setVecElemOperand(const StaticInst *si, int idx,
                      const TheISA::VecElem val) override
    {
        setVecElemResult(val);
    }
 
    void
    setVecPredRegOperand(const StaticInst *si, int idx,
                         const TheISA::VecPredRegContainer &val) override
    {
        setVecPredResult(val);
    }
 
    void markSrcRegReady();
 
    void markSrcRegReady(RegIndex src_idx);
 
    void setCompleted() { status.set(Completed); }
 
    bool isCompleted() const { return status[Completed]; }
 
    void setResultReady() { status.set(ResultReady); }
 
    bool isResultReady() const { return status[ResultReady]; }
 
    void setCanIssue() { status.set(CanIssue); }
 
    bool readyToIssue() const { return status[CanIssue]; }
 
    void clearCanIssue() { status.reset(CanIssue); }
 
    void setIssued() { status.set(Issued); }
 
    bool isIssued() const { return status[Issued]; }
 
    void clearIssued() { status.reset(Issued); }
 
    void setExecuted() { status.set(Executed); }
 
    bool isExecuted() const { return status[Executed]; }
 
    void setCanCommit() { status.set(CanCommit); }
 
    void clearCanCommit() { status.reset(CanCommit); }
 
    bool readyToCommit() const { return status[CanCommit]; }
 
    void setAtCommit() { status.set(AtCommit); }
 
    bool isAtCommit() { return status[AtCommit]; }
 
    void setCommitted() { status.set(Committed); }
 
    bool isCommitted() const { return status[Committed]; }
 
    void setSquashed();
 
    bool isSquashed() const { return status[Squashed]; }
 
    //Instruction Queue Entry
    //-----------------------
    void setInIQ() { status.set(IqEntry); }
 
    void clearInIQ() { status.reset(IqEntry); }
 
    bool isInIQ() const { return status[IqEntry]; }
 
    void setSquashedInIQ() { status.set(SquashedInIQ); status.set(Squashed);}
 
    bool isSquashedInIQ() const { return status[SquashedInIQ]; }
 
 
    //Load / Store Queue Functions
    //-----------------------
    void setInLSQ() { status.set(LsqEntry); }
 
    void removeInLSQ() { status.reset(LsqEntry); }
 
    bool isInLSQ() const { return status[LsqEntry]; }
 
    void setSquashedInLSQ() { status.set(SquashedInLSQ); status.set(Squashed);}
 
    bool isSquashedInLSQ() const { return status[SquashedInLSQ]; }
 
 
    //Reorder Buffer Functions
    //-----------------------
    void setInROB() { status.set(RobEntry); }
 
    void clearInROB() { status.reset(RobEntry); }
 
    bool isInROB() const { return status[RobEntry]; }
 
    void setSquashedInROB() { status.set(SquashedInROB); }
 
    bool isSquashedInROB() const { return status[SquashedInROB]; }
 
    bool isPinnedRegsRenamed() const { return status[PinnedRegsRenamed]; }
 
    void
    setPinnedRegsRenamed()
    {
        assert(!status[PinnedRegsSquashDone]);
        assert(!status[PinnedRegsWritten]);
        status.set(PinnedRegsRenamed);
    }
 
    bool isPinnedRegsWritten() const { return status[PinnedRegsWritten]; }
 
    void
    setPinnedRegsWritten()
    {
        assert(!status[PinnedRegsSquashDone]);
        assert(status[PinnedRegsRenamed]);
        status.set(PinnedRegsWritten);
    }
 
    bool
    isPinnedRegsSquashDone() const { return status[PinnedRegsSquashDone]; }
 
    void
    setPinnedRegsSquashDone() {
        assert(!status[PinnedRegsSquashDone]);
        status.set(PinnedRegsSquashDone);
    }
 
    TheISA::PCState pcState() const override { return pc; }
 
    void pcState(const TheISA::PCState &val) override { pc = val; }
 
    Addr instAddr() const { return pc.instAddr(); }
 
    Addr nextInstAddr() const { return pc.nextInstAddr(); }
 
    Addr microPC() const { return pc.microPC(); }
 
    bool readPredicate() const override { return instFlags[Predicate]; }
 
    void
    setPredicate(bool val) override
    {
        instFlags[Predicate] = val;
 
        if (traceData) {
            traceData->setPredicate(val);
        }
    }
 
    bool
    readMemAccPredicate() const override
    {
        return instFlags[MemAccPredicate];
    }
 
    void
    setMemAccPredicate(bool val) override
    {
        instFlags[MemAccPredicate] = val;
    }
 
    void setTid(ThreadID tid) { threadNumber = tid; }
 
    void setThreadState(ImplState *state) { thread = state; }
 
    ThreadContext *tcBase() const override { return thread->getTC(); }
 
  public:
    bool eaSrcsReady() const;
 
    bool strictlyOrdered() const { return instFlags[IsStrictlyOrdered]; }
    void strictlyOrdered(bool so) { instFlags[IsStrictlyOrdered] = so; }
 
    bool hasRequest() const { return instFlags[ReqMade]; }
    void setRequest() { instFlags[ReqMade] = true; }
 
    ListIt &getInstListIt() { return instListIt; }
 
    void setInstListIt(ListIt _instListIt) { instListIt = _instListIt; }
 
  public:
    unsigned int
    readStCondFailures() const override
    {
        return thread->storeCondFailures;
    }
 
    void
    setStCondFailures(unsigned int sc_failures) override
    {
        thread->storeCondFailures = sc_failures;
    }
 
  public:
    // monitor/mwait funtions
    void
    armMonitor(Addr address) override
    {
        cpu->armMonitor(threadNumber, address);
    }
    bool
    mwait(PacketPtr pkt) override
    {
        return cpu->mwait(threadNumber, pkt);
    }
    void
    mwaitAtomic(ThreadContext *tc) override
    {
        return cpu->mwaitAtomic(threadNumber, tc, cpu->mmu);
    }
    AddressMonitor *
    getAddrMonitor() override
    {
        return cpu->getCpuAddrMonitor(threadNumber);
    }
};
 
template<class Impl>
Fault
BaseDynInst<Impl>::initiateMemRead(Addr addr, unsigned size,
                                   Request::Flags flags,
                                   const std::vector<bool> &byte_enable)
{
    assert(byte_enable.size() == size);
    return cpu->pushRequest(
        dynamic_cast<typename DynInstPtr::PtrType>(this),
        /* ld */ true, nullptr, size, addr, flags, nullptr, nullptr,
        byte_enable);
}
 
template<class Impl>
Fault
BaseDynInst<Impl>::initiateHtmCmd(Request::Flags flags)
{
    return cpu->pushRequest(
            dynamic_cast<typename DynInstPtr::PtrType>(this),
            /* ld */ true, nullptr, 8, 0x0ul, flags, nullptr, nullptr);
}
 
template<class Impl>
Fault
BaseDynInst<Impl>::writeMem(uint8_t *data, unsigned size, Addr addr,
                            Request::Flags flags, uint64_t *res,
                            const std::vector<bool> &byte_enable)
{
    assert(byte_enable.size() == size);
    return cpu->pushRequest(
        dynamic_cast<typename DynInstPtr::PtrType>(this),
        /* st */ false, data, size, addr, flags, res, nullptr,
        byte_enable);
}
 
template<class Impl>
Fault
BaseDynInst<Impl>::initiateMemAMO(Addr addr, unsigned size,
                                  Request::Flags flags,
                                  AtomicOpFunctorPtr amo_op)
{
    // atomic memory instructions do not have data to be written to memory yet
    // since the atomic operations will be executed directly in cache/memory.
    // Therefore, its `data` field is nullptr.
    // Atomic memory requests need to carry their `amo_op` fields to cache/
    // memory
    return cpu->pushRequest(
            dynamic_cast<typename DynInstPtr::PtrType>(this),
            /* atomic */ false, nullptr, size, addr, flags, nullptr,
            std::move(amo_op), std::vector<bool>(size, true));
}
 
#endif // __CPU_BASE_DYN_INST_HH__