#include <BFShareOperandsLate.hh>

Inheritance diagram for BFShareOperandsLate:

Collaboration diagram for BFShareOperandsLate:

Public Member Functions
	BFShareOperandsLate (BF2Scheduler &sched, MoveNode &mn)

virtual bool	operator() ()

Public Member Functions inherited from BFOptimization
	BFOptimization (BF2Scheduler &sched)

virtual bool	isFinishFront ()

virtual void	mightBeReady (MoveNode &mn)

Public Member Functions inherited from Reversible
virtual void	undo ()

virtual	~Reversible ()

void	deleteChildren (std::stack< Reversible * > &children)

int	id ()

	Reversible ()

Protected Member Functions
virtual void	undoOnlyMe ()

Protected Member Functions inherited from BFOptimization
DataDependenceGraph &	ddg ()

DataDependenceGraph *	rootDDG ()

const DataDependenceGraph &	ddg () const

DataDependenceGraph *	prologDDG ()

SimpleResourceManager &	rm () const

SimpleResourceManager *	prologRM () const

BUMoveNodeSelector &	selector ()

const TTAMachine::Machine &	targetMachine () const

unsigned int	ii () const

MoveNodeDuplicator &	duplicator () const

virtual bool	assign (int cycle, MoveNode &, const TTAMachine::Bus bus=nullptr, const TTAMachine::FunctionUnit srcFU_=nullptr, const TTAMachine::FunctionUnit dstFU=nullptr, const TTAMachine::Bus prologBus=nullptr, int immWriteCycle=-1, int prologImmWriteCycle=-1, const TTAMachine::ImmediateUnit *immu=nullptr, int immRegIndex=-1, bool ignoreGuardWriteCycle=false)

virtual void	unassign (MoveNode &mn, bool disposePrologCopy=true)

virtual int	rmEC (int cycle, MoveNode &mn, const TTAMachine::Bus bus=nullptr, const TTAMachine::FunctionUnit srcFU=nullptr, const TTAMachine::FunctionUnit dstFU=nullptr, const TTAMachine::Bus prologBus=nullptr, int immWriteCycle=-1, int prologImmWriteCycle=-1, const TTAMachine::ImmediateUnit *immu=nullptr, int immRegIndex=-1)

virtual int	rmLC (int cycle, MoveNode &mn, const TTAMachine::Bus bus=nullptr, const TTAMachine::FunctionUnit srcFU=nullptr, const TTAMachine::FunctionUnit dstFU=nullptr, const TTAMachine::Bus prologBus=nullptr, int immWriteCycle=-1, int prologImmWriteCycle=-1, const TTAMachine::ImmediateUnit *immu=nullptr, int immRegIndex=-1)

virtual bool	canAssign (int cycle, MoveNode &mn, const TTAMachine::Bus bus=nullptr, const TTAMachine::FunctionUnit srcFU=nullptr, const TTAMachine::FunctionUnit dstFU=nullptr, const TTAMachine::Bus prologBus=nullptr, int immWriteCycle=-1, int prologImmWriteCycle=-1, const TTAMachine::ImmediateUnit *immu=nullptr, int immRegIndex=-1, bool ignoreGWN=false)

bool	putAlsoToPrologEpilog (int cycle, MoveNode &mn)

void	setPrologSrcFUAnno (MoveNode &prologMN, MoveNode &loopMN)

void	setPrologDstFUAnno (MoveNode &prologMN, MoveNode &loopMN)

void	setJumpGuard (MoveNode &mn)

void	unsetJumpGuard (MoveNode &mn)

bool	needJumpGuard (const MoveNode &mn, int cycle)

int	jumpGuardAvailableCycle (const MoveNode &mn)

bool	canBeSpeculated (const Operation &op)

bool	canBeSpeculated (const MoveNode &mn)

bool	usePrologMove (const MoveNode &mn)

bool	canBeScheduled (const MoveNode &mn)

const TTAMachine::RegisterFile *	RFReadPortCountPreventsScheduling (const MoveNode &mn)

bool	immCountPreventsScheduling (const MoveNode &mn)

Protected Member Functions inherited from Reversible
bool	runPreChild (Reversible *preChild)

bool	runPostChild (Reversible *preChild)

bool	runChild (std::stack< Reversible * > &children, Reversible *child)

bool	runChild (Reversible *child, bool pre)

void	undoAndRemovePreChildren ()

void	undoAndRemovePostChildren ()

void	undoAndRemoveChildren (std::stack< Reversible * > &children)

Private Attributes
MoveNode &	mn_

int	operandShareDistance_

Additional Inherited Members
Static Public Member Functions inherited from BFOptimization
static void	clearPrologMoves ()

static MoveNode *	getSisterTrigger (const MoveNode &mn, const TTAMachine::Machine &mach)

Protected Attributes inherited from BFOptimization
BF2Scheduler &	sched_

Protected Attributes inherited from Reversible
std::stack< Reversible * >	preChildren_

std::stack< Reversible * >	postChildren_

Static Protected Attributes inherited from BFOptimization
static std::map< MoveNode , MoveNode , MoveNode::Comparator >	prologMoves_

Detailed Description

Definition at line 42 of file BFShareOperandsLate.hh.

Constructor & Destructor Documentation

◆ BFShareOperandsLate()

BFShareOperandsLate::BFShareOperandsLate	(	BF2Scheduler &	sched,
		MoveNode &	mn
	)

Definition at line 49 of file BFShareOperandsLate.cc.

                                                                          :
    BFOptimization(sched), mn_(mn), operandShareDistance_(6) {
    SchedulerCmdLineOptions* opts =
        dynamic_cast<SchedulerCmdLineOptions*>(Application::cmdLineOptions());
    if (opts != NULL) {
        if (opts->operandShareDistance() > -1) {
            operandShareDistance_ = opts->operandShareDistance();
        }
    }
 
}

References Application::cmdLineOptions(), SchedulerCmdLineOptions::operandShareDistance(), and operandShareDistance_.

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Member Function Documentation

◆ operator()()

bool BFShareOperandsLate::operator() ( )

virtual

This performs the operation. Returns true if success, false if fail.

Implements Reversible.

Definition at line 62 of file BFShareOperandsLate.cc.

                                     {
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    std::cerr << "\t\tTrying share operands late for: " << mn_.toString()
              << std::endl;
#endif
    TTAProgram::Move& currMove = mn_.move();
    TTAProgram::Terminal& currDest = currMove.destination();
    TTAProgram::Terminal& currSrc = currMove.source();
    if (currSrc.isImmediateRegister() ||
        currSrc.isFUPort()) {
        // lets not analyze yet when data in these change
        return false;
    }
 
    if (!currDest.isFUPort() ||
        currDest.isTriggering() ||
        currDest.isOpcodeSetting()) {
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
        std::cerr << "\t\t\tdest not operand port" << std::endl;
#endif
        return false;
    }
 
//    TTAMachine::RegisterFile* guardRF = NULL;
//    int guardIndex = -1;
//    bool guardInverted = false;
    if (!currMove.isUnconditional()) {
        return false;
        /*
        TTAMachine::Guard& guard = move.guard().guard();
        RegisterGuard* rg = dynamic_cast<TTAMachine::RegisterGuard*>(&guard);
        if (rg) {
            guardRF = rg->registerFile();
            guardIndex = rg->registerIndex();
            guardInverted = rg->isInverted();
        }
        */
    }
 
 
    int cycle = mn_.cycle();
    unsigned int idx = rm().instructionIndex(cycle);
    unsigned int limit = ii() ? std::min(ii(), idx+operandShareDistance_) :
        std::min((unsigned)rm().largestCycle()+1, idx+operandShareDistance_);
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    std::cerr << "\t\t\tidx: " << idx << " limit:" << limit << std::endl;
#endif
    for (unsigned int i = idx; i < limit; i++) {
        const TTAProgram::Instruction& ins = *rm().instruction(i);
        for (int j = 0; j < ins.moveCount(); j++) {
            const TTAProgram::Move& laterMove = ins.move(j);
            const TTAProgram::Terminal& laterDest = laterMove.destination();
            if (&laterMove == &currMove) {
                continue;
            }
            if (!laterDest.equals(currDest)) {
                continue;
            }
 
            const TTAProgram::Terminal& laterSrc = laterMove.source();
            if (laterSrc.equals(currSrc)) {
                MoveNode& laterNode = ddg().nodeOfMove(laterMove);
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
                std::cerr << "\t\t\t\tOriginal scheduled move: " << mn_.toString()
                          << std::endl;
                std::cerr << "\t\t\t\tLate op sharing Could remove later move: "
                          << laterNode.toString() << std::endl;
#endif
                BFShareOperandLate* bfsol =
                    new BFShareOperandLate(sched_,laterNode, mn_);
                return runPostChild(bfsol);
            } else {
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
                std::cerr << "\t\t\tAnother move overwrites my dest"
                          << ddg().nodeOfMove(laterMove).toString() << std::endl;
#endif
                return false;
            }
        }
        for (int j = 0; j < ins.moveCount(); j++) {
            TTAProgram::Move& laterMove = ins.move(j);
            TTAProgram::Terminal& laterDest = laterMove.destination();
            // src is overwritten here
            if (laterDest.equals(currSrc)) {
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
                std::cerr << "\t\t\tOverwrites src: " <<
                    ddg().nodeOfMove(laterMove).toString() << std::endl;
#endif
                return false;
            }
        }
    }
    return false;
}

References MoveNode::cycle(), BFOptimization::ddg(), TTAProgram::Move::destination(), TTAProgram::Terminal::equals(), BFOptimization::ii(), SimpleResourceManager::instruction(), SimpleResourceManager::instructionIndex(), TTAProgram::Terminal::isFUPort(), TTAProgram::Terminal::isImmediateRegister(), TTAProgram::Terminal::isOpcodeSetting(), TTAProgram::Terminal::isTriggering(), TTAProgram::Move::isUnconditional(), mn_, MoveNode::move(), TTAProgram::Instruction::move(), TTAProgram::Instruction::moveCount(), DataDependenceGraph::nodeOfMove(), operandShareDistance_, BFOptimization::rm(), Reversible::runPostChild(), BFOptimization::sched_, TTAProgram::Move::source(), and MoveNode::toString().

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◆ undoOnlyMe()

void BFShareOperandsLate::undoOnlyMe ( )

protectedvirtual

Undoes the operations done by this class but not children. This method should be overloaded by most derived classes.

Reimplemented from Reversible.

Definition at line 157 of file BFShareOperandsLate.cc.

                                     {
 
}

Member Data Documentation

◆ mn_

MoveNode& BFShareOperandsLate::mn_

private

Definition at line 49 of file BFShareOperandsLate.hh.

Referenced by operator()().

◆ operandShareDistance_

int BFShareOperandsLate::operandShareDistance_

private

Definition at line 50 of file BFShareOperandsLate.hh.

Referenced by BFShareOperandsLate(), and operator()().

The documentation for this class was generated from the following files:

Public Member Functions

Protected Member Functions

Private Attributes

Additional Inherited Members