#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.

43 :

44 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().

Here is the call graph for this function:

◆ 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_);
 }