src/cpu/inorder/inorder_dyn_inst.cc - amd/gem5 - Git at Google

 /*
  * Copyright (c) 2007 MIPS Technologies, Inc.
  * 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: Korey Sewell
  *
  */

 #include <iostream>
 #include <set>
 #include <sstream>
 #include <string>

 #include "arch/faults.hh"
 #include "base/cprintf.hh"
 #include "base/trace.hh"
 #include "config/the_isa.hh"
 #include "cpu/inorder/cpu.hh"
 #include "cpu/inorder/inorder_dyn_inst.hh"
 #include "cpu/exetrace.hh"
 #include "mem/request.hh"

 using namespace std;
 using namespace TheISA;
 using namespace ThePipeline;

 InOrderDynInst::InOrderDynInst(InOrderCPU *cpu,
                                InOrderThreadState *state,
                                InstSeqNum seq_num,
                                ThreadID tid,
                                unsigned _asid)
   : seqNum(seq_num), bdelaySeqNum(0), threadNumber(tid), asid(_asid),
     virtProcNumber(0), staticInst(NULL), traceData(NULL), cpu(cpu),
     thread(state), fault(NoFault), memData(NULL), loadData(0),
     storeData(0), effAddr(0), physEffAddr(0), memReqFlags(0),
     readyRegs(0), pc(0), predPC(0), memAddr(0), nextStage(0),
     memTime(0), splitMemData(NULL), splitMemReq(NULL), totalSize(0),
     split2ndSize(0), split2ndAddr(0), split2ndAccess(false),
     split2ndDataPtr(NULL), split2ndFlags(0), splitInst(false),
     splitFinishCnt(0), split2ndStoreDataPtr(NULL), splitInstSked(false),
     inFrontEnd(true), frontSked(NULL), backSked(NULL),
     squashingStage(0), predictTaken(false), procDelaySlotOnMispred(false),
     fetchMemReq(NULL), dataMemReq(NULL), instEffAddr(0), eaCalcDone(false),
     lqIdx(0), sqIdx(0), instListIt(NULL)
 {
     for(int i = 0; i < MaxInstSrcRegs; i++) {
         instSrc[i].integer = 0;
         instSrc[i].dbl = 0;
         _readySrcRegIdx[i] = false;
         _srcRegIdx[i] = 0;
     }

     for(int j = 0; j < MaxInstDestRegs; j++) {
       _destRegIdx[j] = 0;
       _prevDestRegIdx[j] = 0;
     }

     ++instcount;
     DPRINTF(InOrderDynInst, "DynInst: [tid:%i] [sn:%lli] Instruction created."
             " (active insts: %i)\n", threadNumber, seqNum, instcount);

 }

 int InOrderDynInst::instcount = 0;

 void
 InOrderDynInst::setMachInst(ExtMachInst machInst)
 {
     staticInst = StaticInst::decode(machInst, pc.instAddr());

     for (int i = 0; i < this->staticInst->numDestRegs(); i++) {
         _destRegIdx[i] = this->staticInst->destRegIdx(i);
     }

     for (int i = 0; i < this->staticInst->numSrcRegs(); i++) {
         _srcRegIdx[i] = this->staticInst->srcRegIdx(i);
         this->_readySrcRegIdx[i] = 0;
     }
 }

 void
 InOrderDynInst::initVars()
 {
     inFrontEnd = true;

     fetchMemReq = NULL;
     dataMemReq = NULL;
     splitMemData = NULL;
     split2ndAddr = 0;
     split2ndAccess = false;
     splitInst = false;
     splitInstSked = false;
     splitFinishCnt = 0;

     effAddr = 0;
     physEffAddr = 0;

     readyRegs = 0;

     nextStage = 0;

     for(int i = 0; i < MaxInstDestRegs; i++)
         instResult[i].val.integer = 0;

     status.reset();

     memAddrReady = false;
     eaCalcDone = false;

     predictTaken = false;
     procDelaySlotOnMispred = false;

     lqIdx = -1;
     sqIdx = -1;

     // Also make this a parameter, or perhaps get it from xc or cpu.
     asid = 0;

     virtProcNumber = 0;

     // Initialize the fault to be NoFault.
     fault = NoFault;

     // Make sure to have the renamed register entries set to the same
     // as the normal register entries.  It will allow the IQ to work
     // without any modifications.
     if (this->staticInst) {
         for (int i = 0; i < this->staticInst->numDestRegs(); i++) {
             _destRegIdx[i] = this->staticInst->destRegIdx(i);
         }

         for (int i = 0; i < this->staticInst->numSrcRegs(); i++) {
             _srcRegIdx[i] = this->staticInst->srcRegIdx(i);
             this->_readySrcRegIdx[i] = 0;
         }
     }

     // Update Instruction Count for this instruction
     if (instcount > 100) {
         fatal("Number of Active Instructions in CPU is too high. "
                 "(Not Dereferencing Ptrs. Correctly?)\n");
     }
 }

 void
 InOrderDynInst::resetInstCount()
 {
     instcount = 0;
 }


 InOrderDynInst::~InOrderDynInst()
 {
     if (fetchMemReq != 0x0) {
         delete fetchMemReq;
         fetchMemReq = NULL;
     }

     if (dataMemReq != 0x0) {
         delete dataMemReq;
         dataMemReq = NULL;
     }

     if (splitMemReq != 0x0) {
         delete dataMemReq;
         dataMemReq = NULL;
     }

     if (traceData)
         delete traceData;

     if (splitMemData)
         delete [] splitMemData;

     fault = NoFault;

     --instcount;

     DPRINTF(InOrderDynInst, "DynInst: [tid:%i] [sn:%lli] Instruction destroyed"
             " (active insts: %i)\n", threadNumber, seqNum, instcount);
 }

 void
 InOrderDynInst::setStaticInst(StaticInstPtr &static_inst)
 {
     this->staticInst = static_inst;

     // Make sure to have the renamed register entries set to the same
     // as the normal register entries.  It will allow the IQ to work
     // without any modifications.
     if (this->staticInst) {
         for (int i = 0; i < this->staticInst->numDestRegs(); i++) {
             _destRegIdx[i] = this->staticInst->destRegIdx(i);
         }

         for (int i = 0; i < this->staticInst->numSrcRegs(); i++) {
             _srcRegIdx[i] = this->staticInst->srcRegIdx(i);
             this->_readySrcRegIdx[i] = 0;
         }
     }
 }

 Fault
 InOrderDynInst::execute()
 {
     // @todo: Pretty convoluted way to avoid squashing from happening
     // when using the TC during an instruction's execution
     // (specifically for instructions that have side-effects that use
     // the TC).  Fix this.
     bool in_syscall = this->thread->inSyscall;
     this->thread->inSyscall = true;

     this->fault = this->staticInst->execute(this, this->traceData);

     this->thread->inSyscall = in_syscall;

     return this->fault;
 }

 Fault
 InOrderDynInst::calcEA()
 {
     this->fault = this->staticInst->eaComp(this, this->traceData);
     return this->fault;
 }

 Fault
 InOrderDynInst::initiateAcc()
 {
     // @todo: Pretty convoluted way to avoid squashing from happening
     // when using the TC during an instruction's execution
     // (specifically for instructions that have side-effects that use
     // the TC).  Fix this.
     bool in_syscall = this->thread->inSyscall;
     this->thread->inSyscall = true;

     this->fault = this->staticInst->initiateAcc(this, this->traceData);

     this->thread->inSyscall = in_syscall;

     return this->fault;
 }


 Fault
 InOrderDynInst::completeAcc(Packet *pkt)
 {
     this->fault = this->staticInst->completeAcc(pkt, this, this->traceData);

     return this->fault;
 }

 Fault
 InOrderDynInst::memAccess()
 {
     return initiateAcc();
 }


 #if FULL_SYSTEM

 Fault
 InOrderDynInst::hwrei()
 {
     panic("InOrderDynInst: hwrei: unimplemented\n");
     return NoFault;
 }


 void
 InOrderDynInst::trap(Fault fault)
 {
     this->cpu->trap(fault, this->threadNumber, this);
 }


 bool
 InOrderDynInst::simPalCheck(int palFunc)
 {
 #if THE_ISA != ALPHA_ISA
     panic("simPalCheck called, but PAL only exists in Alpha!\n");
 #endif
     return this->cpu->simPalCheck(palFunc, this->threadNumber);
 }
 #else
 void
 InOrderDynInst::syscall(int64_t callnum)
 {
     cpu->syscall(callnum, this->threadNumber);
 }
 #endif

 void
 InOrderDynInst::releaseReq(ResourceRequest* req)
 {
     std::list<ResourceRequest*>::iterator list_it = reqList.begin();
     std::list<ResourceRequest*>::iterator list_end = reqList.end();

     while(list_it != list_end) {
         if((*list_it)->getResIdx() == req->getResIdx() &&
            (*list_it)->getSlot() == req->getSlot()) {
             DPRINTF(InOrderDynInst, "[tid:%u]: [sn:%i] Done with request "
                     "to %s.\n", threadNumber, seqNum, req->res->name());
             reqList.erase(list_it);
             return;
         }
         list_it++;
     }

     panic("Releasing Res. Request That Isnt There!\n");
 }

 /** Records an integer source register being set to a value. */
 void
 InOrderDynInst::setIntSrc(int idx, uint64_t val)
 {
     DPRINTF(InOrderDynInst, "[tid:%i]: [sn:%i] Source Value %i being set "
             "to %#x.\n", threadNumber, seqNum, idx, val);
     instSrc[idx].integer = val;
 }

 /** Records an fp register being set to a value. */
 void
 InOrderDynInst::setFloatSrc(int idx, FloatReg val)
 {
     instSrc[idx].dbl = val;
 }

 /** Records an fp register being set to an integer value. */
 void
 InOrderDynInst::setFloatRegBitsSrc(int idx, uint64_t val)
 {
     instSrc[idx].integer = val;
 }

 /** Reads a integer register. */
 IntReg
 InOrderDynInst::readIntRegOperand(const StaticInst *si, int idx, ThreadID tid)
 {
     DPRINTF(InOrderDynInst, "[tid:%i]: [sn:%i] Source Value %i read as %#x.\n",
             threadNumber, seqNum, idx, instSrc[idx].integer);
     return instSrc[idx].integer;
 }

 /** Reads a FP register. */
 FloatReg
 InOrderDynInst::readFloatRegOperand(const StaticInst *si, int idx)
 {
     return instSrc[idx].dbl;
 }


 /** Reads a FP register as a integer. */
 FloatRegBits
 InOrderDynInst::readFloatRegOperandBits(const StaticInst *si, int idx)
 {
     return instSrc[idx].integer;
 }

 /** Reads a miscellaneous register. */
 MiscReg
 InOrderDynInst::readMiscReg(int misc_reg)
 {
     return this->cpu->readMiscReg(misc_reg, threadNumber);
 }


 /** Reads a misc. register, including any side-effects the read
  * might have as defined by the architecture.
  */
 MiscReg
 InOrderDynInst::readMiscRegOperand(const StaticInst *si, int idx)
 {
     DPRINTF(InOrderDynInst, "[tid:%i]: [sn:%i] Misc. Reg Source Value %i"
             " read as %#x.\n", threadNumber, seqNum, idx,
             instSrc[idx].integer);
     return instSrc[idx].integer;
 }


 /** Sets a misc. register, including any side-effects the write
  * might have as defined by the architecture.
  */
 void
 InOrderDynInst::setMiscRegOperand(const StaticInst *si, int idx,
                        const MiscReg &val)
 {
     instResult[idx].type = Integer;
     instResult[idx].val.integer = val;
     instResult[idx].tick = curTick();

     DPRINTF(InOrderDynInst, "[tid:%i]: [sn:%i] Setting Misc Reg. Operand %i "
             "being set to %#x.\n", threadNumber, seqNum, idx, val);
 }

 MiscReg
 InOrderDynInst::readRegOtherThread(unsigned reg_idx, ThreadID tid)
 {
     if (tid == -1) {
         tid = TheISA::getTargetThread(this->cpu->tcBase(threadNumber));
     }

     if (reg_idx < FP_Base_DepTag) {                   // Integer Register File
         return this->cpu->readIntReg(reg_idx, tid);
     } else if (reg_idx < Ctrl_Base_DepTag) {          // Float Register File
         reg_idx -= FP_Base_DepTag;
         return this->cpu->readFloatRegBits(reg_idx, tid);
     } else {
         reg_idx -= Ctrl_Base_DepTag;
         return this->cpu->readMiscReg(reg_idx, tid);  // Misc. Register File
     }
 }

 /** Sets a Integer register. */
 void
 InOrderDynInst::setIntRegOperand(const StaticInst *si, int idx, IntReg val)
 {
     instResult[idx].type = Integer;
     instResult[idx].val.integer = val;
     instResult[idx].tick = curTick();

     DPRINTF(InOrderDynInst, "[tid:%i]: [sn:%i] Setting Result Int Reg. %i "
             "being set to %#x (result-tick:%i).\n",
             threadNumber, seqNum, idx, val, instResult[idx].tick);
 }

 /** Sets a FP register. */
 void
 InOrderDynInst::setFloatRegOperand(const StaticInst *si, int idx, FloatReg val)
 {
     instResult[idx].val.dbl = val;
     instResult[idx].type = Float;
     instResult[idx].tick = curTick();

     DPRINTF(InOrderDynInst, "[tid:%i]: [sn:%i] Setting Result Float Reg. %i "
             "being set to %#x (result-tick:%i).\n",
             threadNumber, seqNum, idx, val, instResult[idx].tick);
 }

 /** Sets a FP register as a integer. */
 void
 InOrderDynInst::setFloatRegOperandBits(const StaticInst *si, int idx,
                               FloatRegBits val)
 {
     instResult[idx].type = Integer;
     instResult[idx].val.integer = val;
     instResult[idx].tick = curTick();

     DPRINTF(InOrderDynInst, "[tid:%i]: [sn:%i] Setting Result Float Reg. %i "
             "being set to %#x (result-tick:%i).\n",
             threadNumber, seqNum, idx, val, instResult[idx].tick);
 }

 /** Sets a misc. register, including any side-effects the write
  * might have as defined by the architecture.
  */
 /* Alter this if/when wanting to *speculate* on Miscellaneous registers */
 void
 InOrderDynInst::setMiscReg(int misc_reg, const MiscReg &val)
 {
     this->cpu->setMiscReg(misc_reg, val, threadNumber);
 }

 void
 InOrderDynInst::setRegOtherThread(unsigned reg_idx, const MiscReg &val,
                                   ThreadID tid)
 {
     if (tid == InvalidThreadID) {
         tid = TheISA::getTargetThread(this->cpu->tcBase(threadNumber));
     }

     if (reg_idx < FP_Base_DepTag) {            // Integer Register File
         this->cpu->setIntReg(reg_idx, val, tid);
     } else if (reg_idx < Ctrl_Base_DepTag) {   // Float Register File
         reg_idx -= FP_Base_DepTag;
         this->cpu->setFloatRegBits(reg_idx, val, tid);
     } else {
         reg_idx -= Ctrl_Base_DepTag;
         this->cpu->setMiscReg(reg_idx, val, tid); // Misc. Register File
     }
 }

 void
 InOrderDynInst::deallocateContext(int thread_num)
 {
     this->cpu->deallocateContext(thread_num);
 }

 Fault
 InOrderDynInst::readBytes(Addr addr, uint8_t *data,
                           unsigned size, unsigned flags)
 {
     return cpu->read(this, addr, data, size, flags);
 }

 template<class T>
 inline Fault
 InOrderDynInst::read(Addr addr, T &data, unsigned flags)
 {
     if (traceData) {
         traceData->setAddr(addr);
         traceData->setData(data);
     }
     Fault fault = readBytes(addr, (uint8_t *)&data, sizeof(T), flags);
     data = TheISA::gtoh(data);
     if (traceData)
         traceData->setData(data);
     return fault;
 }

 #ifndef DOXYGEN_SHOULD_SKIP_THIS

 template
 Fault
 InOrderDynInst::read(Addr addr, uint64_t &data, unsigned flags);

 template
 Fault
 InOrderDynInst::read(Addr addr, uint32_t &data, unsigned flags);

 template
 Fault
 InOrderDynInst::read(Addr addr, uint16_t &data, unsigned flags);

 template
 Fault
 InOrderDynInst::read(Addr addr, uint8_t &data, unsigned flags);

 #endif //DOXYGEN_SHOULD_SKIP_THIS

 template<>
 Fault
 InOrderDynInst::read(Addr addr, double &data, unsigned flags)
 {
     return read(addr, *(uint64_t*)&data, flags);
 }

 template<>
 Fault
 InOrderDynInst::read(Addr addr, float &data, unsigned flags)
 {
     return read(addr, *(uint32_t*)&data, flags);
 }

 template<>
 Fault
 InOrderDynInst::read(Addr addr, int32_t &data, unsigned flags)
 {
     return read(addr, (uint32_t&)data, flags);
 }

 Fault
 InOrderDynInst::writeBytes(uint8_t *data, unsigned size,
                            Addr addr, unsigned flags, uint64_t *res)
 {
     assert(sizeof(storeData) >= size);
     memcpy(&storeData, data, size);
     return cpu->write(this, (uint8_t *)&storeData, size, addr, flags, res);
 }

 template<class T>
 inline Fault
 InOrderDynInst::write(T data, Addr addr, unsigned flags, uint64_t *res)
 {
     storeData  = data;

     DPRINTF(InOrderDynInst, "[tid:%i]: [sn:%i] Setting store data to %#x.\n",
             threadNumber, seqNum, storeData);
     if (traceData) {
         traceData->setAddr(addr);
         traceData->setData(data);
     }
     storeData = TheISA::htog(data);
     return writeBytes((uint8_t*)&data, sizeof(T), addr, flags, res);
 }

 #ifndef DOXYGEN_SHOULD_SKIP_THIS
 template
 Fault
 InOrderDynInst::write(uint64_t data, Addr addr,
                        unsigned flags, uint64_t *res);

 template
 Fault
 InOrderDynInst::write(uint32_t data, Addr addr,
                        unsigned flags, uint64_t *res);

 template
 Fault
 InOrderDynInst::write(uint16_t data, Addr addr,
                        unsigned flags, uint64_t *res);

 template
 Fault
 InOrderDynInst::write(uint8_t data, Addr addr,
                        unsigned flags, uint64_t *res);

 #endif //DOXYGEN_SHOULD_SKIP_THIS

 template<>
 Fault
 InOrderDynInst::write(double data, Addr addr, unsigned flags, uint64_t *res)
 {
     return write(*(uint64_t*)&data, addr, flags, res);
 }

 template<>
 Fault
 InOrderDynInst::write(float data, Addr addr, unsigned flags, uint64_t *res)
 {
     return write(*(uint32_t*)&data, addr, flags, res);
 }


 template<>
 Fault
 InOrderDynInst::write(int32_t data, Addr addr, unsigned flags, uint64_t *res)
 {
     return write((uint32_t)data, addr, flags, res);
 }


 void
 InOrderDynInst::dump()
 {
     cprintf("T%d : %#08d `", threadNumber, pc.instAddr());
     cout << staticInst->disassemble(pc.instAddr());
     cprintf("'\n");
 }

 void
 InOrderDynInst::dump(std::string &outstring)
 {
     std::ostringstream s;
     s << "T" << threadNumber << " : " << pc << " "
       << staticInst->disassemble(pc.instAddr());

     outstring = s.str();
 }


 #define NOHASH
 #ifndef NOHASH

 #include "base/hashmap.hh"

 unsigned int MyHashFunc(const InOrderDynInst *addr)
 {
     unsigned a = (unsigned)addr;
     unsigned hash = (((a >> 14) ^ ((a >> 2) & 0xffff))) & 0x7FFFFFFF;

     return hash;
 }

 typedef m5::hash_map<const InOrderDynInst *, const InOrderDynInst *,
                      MyHashFunc>
 my_hash_t;

 my_hash_t thishash;
 #endif
	/*
	* Copyright (c) 2007 MIPS Technologies, Inc.
	* 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: Korey Sewell
	*
	*/

	#include <iostream>
	#include <set>
	#include <sstream>
	#include <string>

	#include "arch/faults.hh"
	#include "base/cprintf.hh"
	#include "base/trace.hh"
	#include "config/the_isa.hh"
	#include "cpu/inorder/cpu.hh"
	#include "cpu/inorder/inorder_dyn_inst.hh"
	#include "cpu/exetrace.hh"
	#include "mem/request.hh"

	using namespace std;
	using namespace TheISA;
	using namespace ThePipeline;

	InOrderDynInst::InOrderDynInst(InOrderCPU *cpu,
	InOrderThreadState *state,
	InstSeqNum seq_num,
	ThreadID tid,
	unsigned _asid)
	: seqNum(seq_num), bdelaySeqNum(0), threadNumber(tid), asid(_asid),
	virtProcNumber(0), staticInst(NULL), traceData(NULL), cpu(cpu),
	thread(state), fault(NoFault), memData(NULL), loadData(0),
	storeData(0), effAddr(0), physEffAddr(0), memReqFlags(0),
	readyRegs(0), pc(0), predPC(0), memAddr(0), nextStage(0),
	memTime(0), splitMemData(NULL), splitMemReq(NULL), totalSize(0),
	split2ndSize(0), split2ndAddr(0), split2ndAccess(false),
	split2ndDataPtr(NULL), split2ndFlags(0), splitInst(false),
	splitFinishCnt(0), split2ndStoreDataPtr(NULL), splitInstSked(false),
	inFrontEnd(true), frontSked(NULL), backSked(NULL),
	squashingStage(0), predictTaken(false), procDelaySlotOnMispred(false),
	fetchMemReq(NULL), dataMemReq(NULL), instEffAddr(0), eaCalcDone(false),
	lqIdx(0), sqIdx(0), instListIt(NULL)
	{
	for(int i = 0; i < MaxInstSrcRegs; i++) {
	instSrc[i].integer = 0;
	instSrc[i].dbl = 0;
	_readySrcRegIdx[i] = false;
	_srcRegIdx[i] = 0;
	}

	for(int j = 0; j < MaxInstDestRegs; j++) {
	_destRegIdx[j] = 0;
	_prevDestRegIdx[j] = 0;
	}

	++instcount;
	DPRINTF(InOrderDynInst, "DynInst: [tid:%i] [sn:%lli] Instruction created."
	" (active insts: %i)\n", threadNumber, seqNum, instcount);

	}

	int InOrderDynInst::instcount = 0;

	void
	InOrderDynInst::setMachInst(ExtMachInst machInst)
	{
	staticInst = StaticInst::decode(machInst, pc.instAddr());

	for (int i = 0; i < this->staticInst->numDestRegs(); i++) {
	_destRegIdx[i] = this->staticInst->destRegIdx(i);
	}

	for (int i = 0; i < this->staticInst->numSrcRegs(); i++) {
	_srcRegIdx[i] = this->staticInst->srcRegIdx(i);
	this->_readySrcRegIdx[i] = 0;
	}
	}

	void
	InOrderDynInst::initVars()
	{
	inFrontEnd = true;

	fetchMemReq = NULL;
	dataMemReq = NULL;
	splitMemData = NULL;
	split2ndAddr = 0;
	split2ndAccess = false;
	splitInst = false;
	splitInstSked = false;
	splitFinishCnt = 0;

	effAddr = 0;
	physEffAddr = 0;

	readyRegs = 0;

	nextStage = 0;

	for(int i = 0; i < MaxInstDestRegs; i++)
	instResult[i].val.integer = 0;

	status.reset();

	memAddrReady = false;
	eaCalcDone = false;

	predictTaken = false;
	procDelaySlotOnMispred = false;

	lqIdx = -1;
	sqIdx = -1;

	// Also make this a parameter, or perhaps get it from xc or cpu.
	asid = 0;

	virtProcNumber = 0;

	// Initialize the fault to be NoFault.
	fault = NoFault;

	// Make sure to have the renamed register entries set to the same
	// as the normal register entries. It will allow the IQ to work
	// without any modifications.
	if (this->staticInst) {
	for (int i = 0; i < this->staticInst->numDestRegs(); i++) {
	_destRegIdx[i] = this->staticInst->destRegIdx(i);
	}

	for (int i = 0; i < this->staticInst->numSrcRegs(); i++) {
	_srcRegIdx[i] = this->staticInst->srcRegIdx(i);
	this->_readySrcRegIdx[i] = 0;
	}
	}

	// Update Instruction Count for this instruction
	if (instcount > 100) {
	fatal("Number of Active Instructions in CPU is too high. "
	"(Not Dereferencing Ptrs. Correctly?)\n");
	}
	}

	void
	InOrderDynInst::resetInstCount()
	{
	instcount = 0;
	}


	InOrderDynInst::~InOrderDynInst()
	{
	if (fetchMemReq != 0x0) {
	delete fetchMemReq;
	fetchMemReq = NULL;
	}

	if (dataMemReq != 0x0) {
	delete dataMemReq;
	dataMemReq = NULL;
	}

	if (splitMemReq != 0x0) {
	delete dataMemReq;
	dataMemReq = NULL;
	}

	if (traceData)
	delete traceData;

	if (splitMemData)
	delete [] splitMemData;

	fault = NoFault;

	--instcount;

	DPRINTF(InOrderDynInst, "DynInst: [tid:%i] [sn:%lli] Instruction destroyed"
	" (active insts: %i)\n", threadNumber, seqNum, instcount);
	}

	void
	InOrderDynInst::setStaticInst(StaticInstPtr &static_inst)
	{
	this->staticInst = static_inst;

	// Make sure to have the renamed register entries set to the same
	// as the normal register entries. It will allow the IQ to work
	// without any modifications.
	if (this->staticInst) {
	for (int i = 0; i < this->staticInst->numDestRegs(); i++) {
	_destRegIdx[i] = this->staticInst->destRegIdx(i);
	}

	for (int i = 0; i < this->staticInst->numSrcRegs(); i++) {
	_srcRegIdx[i] = this->staticInst->srcRegIdx(i);
	this->_readySrcRegIdx[i] = 0;
	}
	}
	}

	Fault
	InOrderDynInst::execute()
	{
	// @todo: Pretty convoluted way to avoid squashing from happening
	// when using the TC during an instruction's execution
	// (specifically for instructions that have side-effects that use
	// the TC). Fix this.
	bool in_syscall = this->thread->inSyscall;
	this->thread->inSyscall = true;

	this->fault = this->staticInst->execute(this, this->traceData);

	this->thread->inSyscall = in_syscall;

	return this->fault;
	}

	Fault
	InOrderDynInst::calcEA()
	{
	this->fault = this->staticInst->eaComp(this, this->traceData);
	return this->fault;
	}

	Fault
	InOrderDynInst::initiateAcc()
	{
	// @todo: Pretty convoluted way to avoid squashing from happening
	// when using the TC during an instruction's execution
	// (specifically for instructions that have side-effects that use
	// the TC). Fix this.
	bool in_syscall = this->thread->inSyscall;
	this->thread->inSyscall = true;

	this->fault = this->staticInst->initiateAcc(this, this->traceData);

	this->thread->inSyscall = in_syscall;

	return this->fault;
	}


	Fault
	InOrderDynInst::completeAcc(Packet *pkt)
	{
	this->fault = this->staticInst->completeAcc(pkt, this, this->traceData);

	return this->fault;
	}

	Fault
	InOrderDynInst::memAccess()
	{
	return initiateAcc();
	}


	#if FULL_SYSTEM

	Fault
	InOrderDynInst::hwrei()
	{
	panic("InOrderDynInst: hwrei: unimplemented\n");
	return NoFault;
	}


	void
	InOrderDynInst::trap(Fault fault)
	{
	this->cpu->trap(fault, this->threadNumber, this);
	}


	bool
	InOrderDynInst::simPalCheck(int palFunc)
	{
	#if THE_ISA != ALPHA_ISA
	panic("simPalCheck called, but PAL only exists in Alpha!\n");
	#endif
	return this->cpu->simPalCheck(palFunc, this->threadNumber);
	}
	#else
	void
	InOrderDynInst::syscall(int64_t callnum)
	{
	cpu->syscall(callnum, this->threadNumber);
	}
	#endif

	void
	InOrderDynInst::releaseReq(ResourceRequest* req)
	{
	std::list<ResourceRequest*>::iterator list_it = reqList.begin();
	std::list<ResourceRequest*>::iterator list_end = reqList.end();

	while(list_it != list_end) {
	if((*list_it)->getResIdx() == req->getResIdx() &&
	(*list_it)->getSlot() == req->getSlot()) {
	DPRINTF(InOrderDynInst, "[tid:%u]: [sn:%i] Done with request "
	"to %s.\n", threadNumber, seqNum, req->res->name());
	reqList.erase(list_it);
	return;
	}
	list_it++;
	}

	panic("Releasing Res. Request That Isnt There!\n");
	}

	/** Records an integer source register being set to a value. */
	void
	InOrderDynInst::setIntSrc(int idx, uint64_t val)
	{
	DPRINTF(InOrderDynInst, "[tid:%i]: [sn:%i] Source Value %i being set "
	"to %#x.\n", threadNumber, seqNum, idx, val);
	instSrc[idx].integer = val;
	}

	/** Records an fp register being set to a value. */
	void
	InOrderDynInst::setFloatSrc(int idx, FloatReg val)
	{
	instSrc[idx].dbl = val;
	}

	/** Records an fp register being set to an integer value. */
	void
	InOrderDynInst::setFloatRegBitsSrc(int idx, uint64_t val)
	{
	instSrc[idx].integer = val;
	}

	/** Reads a integer register. */
	IntReg
	InOrderDynInst::readIntRegOperand(const StaticInst *si, int idx, ThreadID tid)
	{
	DPRINTF(InOrderDynInst, "[tid:%i]: [sn:%i] Source Value %i read as %#x.\n",
	threadNumber, seqNum, idx, instSrc[idx].integer);
	return instSrc[idx].integer;
	}

	/** Reads a FP register. */
	FloatReg
	InOrderDynInst::readFloatRegOperand(const StaticInst *si, int idx)
	{
	return instSrc[idx].dbl;
	}


	/** Reads a FP register as a integer. */
	FloatRegBits
	InOrderDynInst::readFloatRegOperandBits(const StaticInst *si, int idx)
	{
	return instSrc[idx].integer;
	}

	/** Reads a miscellaneous register. */
	MiscReg
	InOrderDynInst::readMiscReg(int misc_reg)
	{
	return this->cpu->readMiscReg(misc_reg, threadNumber);
	}


	/** Reads a misc. register, including any side-effects the read
	* might have as defined by the architecture.
	*/
	MiscReg
	InOrderDynInst::readMiscRegOperand(const StaticInst *si, int idx)
	{
	DPRINTF(InOrderDynInst, "[tid:%i]: [sn:%i] Misc. Reg Source Value %i"
	" read as %#x.\n", threadNumber, seqNum, idx,
	instSrc[idx].integer);
	return instSrc[idx].integer;
	}


	/** Sets a misc. register, including any side-effects the write
	* might have as defined by the architecture.
	*/
	void
	InOrderDynInst::setMiscRegOperand(const StaticInst *si, int idx,
	const MiscReg &val)
	{
	instResult[idx].type = Integer;
	instResult[idx].val.integer = val;
	instResult[idx].tick = curTick();

	DPRINTF(InOrderDynInst, "[tid:%i]: [sn:%i] Setting Misc Reg. Operand %i "
	"being set to %#x.\n", threadNumber, seqNum, idx, val);
	}

	MiscReg
	InOrderDynInst::readRegOtherThread(unsigned reg_idx, ThreadID tid)
	{
	if (tid == -1) {
	tid = TheISA::getTargetThread(this->cpu->tcBase(threadNumber));
	}

	if (reg_idx < FP_Base_DepTag) { // Integer Register File
	return this->cpu->readIntReg(reg_idx, tid);
	} else if (reg_idx < Ctrl_Base_DepTag) { // Float Register File
	reg_idx -= FP_Base_DepTag;
	return this->cpu->readFloatRegBits(reg_idx, tid);
	} else {
	reg_idx -= Ctrl_Base_DepTag;
	return this->cpu->readMiscReg(reg_idx, tid); // Misc. Register File
	}
	}

	/** Sets a Integer register. */
	void
	InOrderDynInst::setIntRegOperand(const StaticInst *si, int idx, IntReg val)
	{
	instResult[idx].type = Integer;
	instResult[idx].val.integer = val;
	instResult[idx].tick = curTick();

	DPRINTF(InOrderDynInst, "[tid:%i]: [sn:%i] Setting Result Int Reg. %i "
	"being set to %#x (result-tick:%i).\n",
	threadNumber, seqNum, idx, val, instResult[idx].tick);
	}

	/** Sets a FP register. */
	void
	InOrderDynInst::setFloatRegOperand(const StaticInst *si, int idx, FloatReg val)
	{
	instResult[idx].val.dbl = val;
	instResult[idx].type = Float;
	instResult[idx].tick = curTick();

	DPRINTF(InOrderDynInst, "[tid:%i]: [sn:%i] Setting Result Float Reg. %i "
	"being set to %#x (result-tick:%i).\n",
	threadNumber, seqNum, idx, val, instResult[idx].tick);
	}

	/** Sets a FP register as a integer. */
	void
	InOrderDynInst::setFloatRegOperandBits(const StaticInst *si, int idx,
	FloatRegBits val)
	{
	instResult[idx].type = Integer;
	instResult[idx].val.integer = val;
	instResult[idx].tick = curTick();

	DPRINTF(InOrderDynInst, "[tid:%i]: [sn:%i] Setting Result Float Reg. %i "
	"being set to %#x (result-tick:%i).\n",
	threadNumber, seqNum, idx, val, instResult[idx].tick);
	}

	/** Sets a misc. register, including any side-effects the write
	* might have as defined by the architecture.
	*/
	/* Alter this if/when wanting to speculate on Miscellaneous registers */
	void
	InOrderDynInst::setMiscReg(int misc_reg, const MiscReg &val)
	{
	this->cpu->setMiscReg(misc_reg, val, threadNumber);
	}

	void
	InOrderDynInst::setRegOtherThread(unsigned reg_idx, const MiscReg &val,
	ThreadID tid)
	{
	if (tid == InvalidThreadID) {
	tid = TheISA::getTargetThread(this->cpu->tcBase(threadNumber));
	}

	if (reg_idx < FP_Base_DepTag) { // Integer Register File
	this->cpu->setIntReg(reg_idx, val, tid);
	} else if (reg_idx < Ctrl_Base_DepTag) { // Float Register File
	reg_idx -= FP_Base_DepTag;
	this->cpu->setFloatRegBits(reg_idx, val, tid);
	} else {
	reg_idx -= Ctrl_Base_DepTag;
	this->cpu->setMiscReg(reg_idx, val, tid); // Misc. Register File
	}
	}

	void
	InOrderDynInst::deallocateContext(int thread_num)
	{
	this->cpu->deallocateContext(thread_num);
	}

	Fault
	InOrderDynInst::readBytes(Addr addr, uint8_t *data,
	unsigned size, unsigned flags)
	{
	return cpu->read(this, addr, data, size, flags);
	}

	template<class T>
	inline Fault
	InOrderDynInst::read(Addr addr, T &data, unsigned flags)
	{
	if (traceData) {
	traceData->setAddr(addr);
	traceData->setData(data);
	}
	Fault fault = readBytes(addr, (uint8_t *)&data, sizeof(T), flags);
	data = TheISA::gtoh(data);
	if (traceData)
	traceData->setData(data);
	return fault;
	}

	#ifndef DOXYGEN_SHOULD_SKIP_THIS

	template
	Fault
	InOrderDynInst::read(Addr addr, uint64_t &data, unsigned flags);

	template
	Fault
	InOrderDynInst::read(Addr addr, uint32_t &data, unsigned flags);

	template
	Fault
	InOrderDynInst::read(Addr addr, uint16_t &data, unsigned flags);

	template
	Fault
	InOrderDynInst::read(Addr addr, uint8_t &data, unsigned flags);

	#endif //DOXYGEN_SHOULD_SKIP_THIS

	template<>
	Fault
	InOrderDynInst::read(Addr addr, double &data, unsigned flags)
	{
	return read(addr, (uint64_t)&data, flags);
	}

	template<>
	Fault
	InOrderDynInst::read(Addr addr, float &data, unsigned flags)
	{
	return read(addr, (uint32_t)&data, flags);
	}

	template<>
	Fault
	InOrderDynInst::read(Addr addr, int32_t &data, unsigned flags)
	{
	return read(addr, (uint32_t&)data, flags);
	}

	Fault
	InOrderDynInst::writeBytes(uint8_t *data, unsigned size,
	Addr addr, unsigned flags, uint64_t *res)
	{
	assert(sizeof(storeData) >= size);
	memcpy(&storeData, data, size);
	return cpu->write(this, (uint8_t *)&storeData, size, addr, flags, res);
	}

	template<class T>
	inline Fault
	InOrderDynInst::write(T data, Addr addr, unsigned flags, uint64_t *res)
	{
	storeData = data;

	DPRINTF(InOrderDynInst, "[tid:%i]: [sn:%i] Setting store data to %#x.\n",
	threadNumber, seqNum, storeData);
	if (traceData) {
	traceData->setAddr(addr);
	traceData->setData(data);
	}
	storeData = TheISA::htog(data);
	return writeBytes((uint8_t*)&data, sizeof(T), addr, flags, res);
	}

	#ifndef DOXYGEN_SHOULD_SKIP_THIS
	template
	Fault
	InOrderDynInst::write(uint64_t data, Addr addr,
	unsigned flags, uint64_t *res);

	template
	Fault
	InOrderDynInst::write(uint32_t data, Addr addr,
	unsigned flags, uint64_t *res);

	template
	Fault
	InOrderDynInst::write(uint16_t data, Addr addr,
	unsigned flags, uint64_t *res);

	template
	Fault
	InOrderDynInst::write(uint8_t data, Addr addr,
	unsigned flags, uint64_t *res);

	#endif //DOXYGEN_SHOULD_SKIP_THIS

	template<>
	Fault
	InOrderDynInst::write(double data, Addr addr, unsigned flags, uint64_t *res)
	{
	return write((uint64_t)&data, addr, flags, res);
	}

	template<>
	Fault
	InOrderDynInst::write(float data, Addr addr, unsigned flags, uint64_t *res)
	{
	return write((uint32_t)&data, addr, flags, res);
	}


	template<>
	Fault
	InOrderDynInst::write(int32_t data, Addr addr, unsigned flags, uint64_t *res)
	{
	return write((uint32_t)data, addr, flags, res);
	}


	void
	InOrderDynInst::dump()
	{
	cprintf("T%d : %#08d `", threadNumber, pc.instAddr());
	cout << staticInst->disassemble(pc.instAddr());
	cprintf("'\n");
	}

	void
	InOrderDynInst::dump(std::string &outstring)
	{
	std::ostringstream s;
	s << "T" << threadNumber << " : " << pc << " "
	<< staticInst->disassemble(pc.instAddr());

	outstring = s.str();
	}


	#define NOHASH
	#ifndef NOHASH

	#include "base/hashmap.hh"

	unsigned int MyHashFunc(const InOrderDynInst *addr)
	{
	unsigned a = (unsigned)addr;
	unsigned hash = (((a >> 14) ^ ((a >> 2) & 0xffff))) & 0x7FFFFFFF;

	return hash;
	}

	typedef m5::hash_map<const InOrderDynInst , const InOrderDynInst ,
	MyHashFunc>
	my_hash_t;

	my_hash_t thishash;
	#endif