BFDropPreShared Class Reference

#include <BFDropPreShared.hh>

Inheritance diagram for BFDropPreShared:

Collaboration diagram for BFDropPreShared:

Public Member Functions
	BFDropPreShared (BF2Scheduler &sched, MoveNode &mn)
bool	operator() ()
void	undoOnlyMe ()
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 ()

Private Attributes
MoveNode &	mn_

Additional Inherited Members
Static Public Member Functions inherited from BFOptimization
static void	clearPrologMoves ()
static MoveNode *	getSisterTrigger (const MoveNode &mn, const TTAMachine::Machine &mach)
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)
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 41 of file BFDropPreShared.hh.

Constructor & Destructor Documentation

BFDropPreShared()

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

inline

Definition at line 43 of file BFDropPreShared.hh.

                                                       :
        BFOptimization(sched), mn_(mn) {}

Member Function Documentation

operator()()

bool BFDropPreShared::operator() ( )

virtual

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

Implements Reversible.

Definition at line 47 of file BFDropPreShared.cc.

                            {
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    std::cerr << "\tDropping pre-shared: " << mn_.toString() << std::endl;
#endif
    MoveNode* trigger = getSisterTrigger(mn_, targetMachine());
    if (trigger == &mn_) {
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
        std::cerr << "Cannot pre-share trigger operand, must swap operands"
                  << std::endl;
#endif
        ProgramOperationPtr destPO = mn_.destinationOperationPtr();
        const Operation& op = destPO->operation();
        int operandCount  = op.numberOfInputs();
        bool swapped = false;
        for (int i = 1 ; i <= operandCount && !swapped; i++) {
            int idx = mn_.move().destination().operationIndex();
            MoveNode& mn = destPO->inputNode(i).at(0);
            if (i != idx && op.canSwap(i, idx) &&
                !sched_.isPreLoopSharedOperand(mn)) {
                // TODO: force the indeces here
                BFSwapOperands* bfswo =
                    new BFSwapOperands(sched_, destPO, mn_, mn);
                if (runPreChild(bfswo)) {
                    swapped = true;
                }
            }
        }
        if (!swapped) {
            return false;
        }
    }
    ddg().dropNode(mn_);
    sched_.nodeKilled(mn_);
    return true;
}

References Operation::canSwap(), BFOptimization::ddg(), TTAProgram::Move::destination(), MoveNode::destinationOperationPtr(), BoostGraph< GraphNode, GraphEdge >::dropNode(), BFOptimization::getSisterTrigger(), BF2Scheduler::isPreLoopSharedOperand(), mn_, MoveNode::move(), BF2Scheduler::nodeKilled(), Operation::numberOfInputs(), TTAProgram::Terminal::operationIndex(), Reversible::runPreChild(), BFOptimization::sched_, BFOptimization::targetMachine(), and MoveNode::toString().

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undoOnlyMe()

void BFDropPreShared::undoOnlyMe ( )

virtual

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 84 of file BFDropPreShared.cc.

                            {
#ifdef DEBUG_BUBBLEFISH_SCHEDULER
    std::cerr << "\tUndoing dropping of pre-shared: " << mn_.toString()
              << std::endl;
#endif
    ddg().restoreNodeFromParent(mn_);
    sched_.nodeResurrected(mn_);
}

References BFOptimization::ddg(), mn_, BF2Scheduler::nodeResurrected(), BoostGraph< GraphNode, GraphEdge >::restoreNodeFromParent(), BFOptimization::sched_, and MoveNode::toString().

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Member Data Documentation

mn_

MoveNode& BFDropPreShared::mn_

private

Definition at line 48 of file BFDropPreShared.hh.

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

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

• BFDropPreShared.hh
• BFDropPreShared.cc