class LSUnitBase

Declaration

class LSUnitBase : public HardwareUnit { /* full declaration omitted */ };

Description

Abstract base interface for LS (load/store) units in llvm-mca.

Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:167

Inherits from: HardwareUnit

Method Overview

Inherited from HardwareUnit:

    Methods

    LSUnitBase(const llvm::MCSchedModel& SM,
           unsigned int LoadQueueSize,
           unsigned int StoreQueueSize,
           bool AssumeNoAlias)

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:199

    Parameters

    const llvm::MCSchedModel& SM
    unsigned int LoadQueueSize
    unsigned int StoreQueueSize
    bool AssumeNoAlias

    void acquireLQSlot()

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:212

    void acquireSQSlot()

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:213

    bool assumeNoAlias() const

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:217

    unsigned int createMemoryGroup()

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:288

    virtual void cycleEvent()

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:307

    virtual unsigned int dispatch(
    const llvm::mca::InstRef& IR)

    Description

    Allocates LS resources for instruction IR. This method assumes that a previous call to `isAvailable(IR)` succeeded with a LSUnitBase::Status value of LSU_AVAILABLE. Returns the GroupID associated with this instruction. That value will be used to set the LSUTokenID field in class Instruction.

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:238

    Parameters

    const llvm::mca::InstRef& IR

    void dump() const

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:310

    const llvm::mca::MemoryGroup& getGroup(
    unsigned int Index) const

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:278

    Parameters

    unsigned int Index

    llvm::mca::MemoryGroup& getGroup(
    unsigned int Index)

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:283

    Parameters

    unsigned int Index

    unsigned int getLoadQueueSize() const

    Description

    Returns the total number of entries in the load queue.

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:205

    unsigned int getStoreQueueSize() const

    Description

    Returns the total number of entries in the store queue.

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:208

    unsigned int getUsedLQEntries() const

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:210

    unsigned int getUsedSQEntries() const

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:211

    bool hasDependentUsers(
    const llvm::mca::InstRef& IR) const

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:272

    Parameters

    const llvm::mca::InstRef& IR

    virtual llvm::mca::LSUnitBase::Status isAvailable(
    const llvm::mca::InstRef& IR) const

    Description

    This method checks the availability of the load/store buffers. Returns LSU_AVAILABLE if there are enough load/store queue entries to accomodate instruction IR. By default, LSU_AVAILABLE is returned if IR is not a memory operation.

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:230

    Parameters

    const llvm::mca::InstRef& IR

    bool isLQEmpty() const

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:241

    bool isLQFull() const

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:243

    bool isPending(const llvm::mca::InstRef& IR) const

    Description

    Check if instruction IR only depends on memory instructions that are currently executing.

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:258

    Parameters

    const llvm::mca::InstRef& IR

    bool isReady(const llvm::mca::InstRef& IR) const

    Description

    Check if a peviously dispatched instruction IR is now ready for execution.

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:250

    Parameters

    const llvm::mca::InstRef& IR

    bool isSQEmpty() const

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:240

    bool isSQFull() const

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:242

    bool isValidGroupID(unsigned int Index) const

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:245

    Parameters

    unsigned int Index

    bool isWaiting(const llvm::mca::InstRef& IR) const

    Description

    Check if instruction IR is still waiting on memory operations, and the wait time is still unknown.

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:266

    Parameters

    const llvm::mca::InstRef& IR

    virtual void onInstructionExecuted(
    const llvm::mca::InstRef& IR)

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:294

    Parameters

    const llvm::mca::InstRef& IR

    virtual void onInstructionIssued(
    const llvm::mca::InstRef& IR)

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:302

    Parameters

    const llvm::mca::InstRef& IR

    virtual void onInstructionRetired(
    const llvm::mca::InstRef& IR)

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:300

    Parameters

    const llvm::mca::InstRef& IR

    void releaseLQSlot()

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:214

    void releaseSQSlot()

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:215

    virtual ~LSUnitBase()

    Declared at: llvm/include/llvm/MCA/HardwareUnits/LSUnit.h:202