gem5  v21.1.0.2
Public Types | Public Member Functions | Private Types | Private Attributes | List of all members
gem5::o3::UnifiedRenameMap Class Reference

Unified register rename map for all classes of registers. More...

#include <rename_map.hh>

Public Types

typedef SimpleRenameMap::RenameInfo RenameInfo
 

Public Member Functions

 UnifiedRenameMap ()
 Default constructor. More...
 
 ~UnifiedRenameMap ()
 Destructor. More...
 
void init (const BaseISA::RegClasses &regClasses, PhysRegFile *_regFile, UnifiedFreeList *freeList, VecMode _mode)
 Initializes rename map with given parameters. More...
 
RenameInfo rename (const RegId &arch_reg)
 Tell rename map to get a new free physical register to remap the specified architectural register. More...
 
PhysRegIdPtr lookup (const RegId &arch_reg) const
 Look up the physical register mapped to an architectural register. More...
 
void setEntry (const RegId &arch_reg, PhysRegIdPtr phys_reg)
 Update rename map with a specific mapping. More...
 
unsigned numFreeEntries () const
 Return the minimum number of free entries across all of the register classes. More...
 
unsigned numFreeIntEntries () const
 
unsigned numFreeFloatEntries () const
 
unsigned numFreeVecEntries () const
 
unsigned numFreePredEntries () const
 
unsigned numFreeCCEntries () const
 
bool canRename (uint32_t intRegs, uint32_t floatRegs, uint32_t vectorRegs, uint32_t vecElemRegs, uint32_t vecPredRegs, uint32_t ccRegs) const
 Return whether there are enough registers to serve the request. More...
 
void switchMode (VecMode newVecMode)
 Set vector mode to Full or Elem. More...
 
void switchFreeList (UnifiedFreeList *freeList)
 Switch freeList of registers from Full to Elem or vicevers depending on vecMode (vector renaming mode). More...
 

Private Types

using VecMode = enums::VecRegRenameMode
 

Private Attributes

SimpleRenameMap intMap
 The integer register rename map. More...
 
SimpleRenameMap floatMap
 The floating-point register rename map. More...
 
SimpleRenameMap ccMap
 The condition-code register rename map. More...
 
SimpleRenameMap vecMap
 The vector register rename map. More...
 
SimpleRenameMap vecElemMap
 The vector element register rename map. More...
 
SimpleRenameMap predMap
 The predicate register rename map. More...
 
VecMode vecMode
 
PhysRegFileregFile
 The register file object is used only to get PhysRegIdPtr on MiscRegs, as they are stored in it. More...
 

Detailed Description

Unified register rename map for all classes of registers.

Wraps a set of class-specific rename maps. Methods that do not specify a register class (e.g., rename()) take register ids, while methods that do specify a register class (e.g., renameInt()) take register indices.

Definition at line 174 of file rename_map.hh.

Member Typedef Documentation

◆ RenameInfo

Definition at line 206 of file rename_map.hh.

◆ VecMode

using gem5::o3::UnifiedRenameMap::VecMode = enums::VecRegRenameMode
private

Definition at line 195 of file rename_map.hh.

Constructor & Destructor Documentation

◆ UnifiedRenameMap()

gem5::o3::UnifiedRenameMap::UnifiedRenameMap ( )
inline

Default constructor.

init() must be called prior to use.

Definition at line 209 of file rename_map.hh.

◆ ~UnifiedRenameMap()

gem5::o3::UnifiedRenameMap::~UnifiedRenameMap ( )
inline

Destructor.

Definition at line 212 of file rename_map.hh.

Member Function Documentation

◆ canRename()

bool gem5::o3::UnifiedRenameMap::canRename ( uint32_t  intRegs,
uint32_t  floatRegs,
uint32_t  vectorRegs,
uint32_t  vecElemRegs,
uint32_t  vecPredRegs,
uint32_t  ccRegs 
) const
inline

Return whether there are enough registers to serve the request.

Definition at line 379 of file rename_map.hh.

References ccMap, floatMap, intMap, gem5::o3::SimpleRenameMap::numFreeEntries(), predMap, vecElemMap, and vecMap.

◆ init()

void gem5::o3::UnifiedRenameMap::init ( const BaseISA::RegClasses regClasses,
PhysRegFile _regFile,
UnifiedFreeList freeList,
VecMode  _mode 
)

◆ lookup()

PhysRegIdPtr gem5::o3::UnifiedRenameMap::lookup ( const RegId arch_reg) const
inline

◆ numFreeCCEntries()

unsigned gem5::o3::UnifiedRenameMap::numFreeCCEntries ( ) const
inline

Definition at line 373 of file rename_map.hh.

References ccMap, and gem5::o3::SimpleRenameMap::numFreeEntries().

◆ numFreeEntries()

unsigned gem5::o3::UnifiedRenameMap::numFreeEntries ( ) const
inline

Return the minimum number of free entries across all of the register classes.

The minimum is used so we guarantee that this number of entries is available regardless of which class of registers is requested.

Definition at line 354 of file rename_map.hh.

References floatMap, intMap, gem5::o3::SimpleRenameMap::numFreeEntries(), predMap, vecElemMap, vecMap, and vecMode.

◆ numFreeFloatEntries()

unsigned gem5::o3::UnifiedRenameMap::numFreeFloatEntries ( ) const
inline

Definition at line 364 of file rename_map.hh.

References floatMap, and gem5::o3::SimpleRenameMap::numFreeEntries().

◆ numFreeIntEntries()

unsigned gem5::o3::UnifiedRenameMap::numFreeIntEntries ( ) const
inline

Definition at line 363 of file rename_map.hh.

References intMap, and gem5::o3::SimpleRenameMap::numFreeEntries().

◆ numFreePredEntries()

unsigned gem5::o3::UnifiedRenameMap::numFreePredEntries ( ) const
inline

Definition at line 372 of file rename_map.hh.

References gem5::o3::SimpleRenameMap::numFreeEntries(), and predMap.

◆ numFreeVecEntries()

unsigned gem5::o3::UnifiedRenameMap::numFreeVecEntries ( ) const
inline

◆ rename()

RenameInfo gem5::o3::UnifiedRenameMap::rename ( const RegId arch_reg)
inline

Tell rename map to get a new free physical register to remap the specified architectural register.

This version takes a RegId and reads the appropriate class-specific rename table.

Parameters
arch_regThe architectural register id to remap.
Returns
A RenameInfo pair indicating both the new and previous physical registers.

Definition at line 226 of file rename_map.hh.

References ccMap, gem5::CCRegClass, gem5::RegId::className(), gem5::RegId::classValue(), floatMap, gem5::FloatRegClass, intMap, gem5::IntRegClass, lookup(), gem5::MiscRegClass, panic, predMap, gem5::o3::SimpleRenameMap::rename(), gem5::VecElemClass, vecElemMap, vecMap, vecMode, gem5::VecPredRegClass, and gem5::VecRegClass.

Referenced by gem5::o3::Rename::renameDestRegs().

◆ setEntry()

void gem5::o3::UnifiedRenameMap::setEntry ( const RegId arch_reg,
PhysRegIdPtr  phys_reg 
)
inline

Update rename map with a specific mapping.

Generally used to roll back to old mappings on a squash. This version takes a flattened architectural register id and calls the appropriate class-specific rename table.

Parameters
arch_regThe architectural register to remap.
phys_regThe physical register to remap it to.

Definition at line 309 of file rename_map.hh.

References ccMap, gem5::CCRegClass, gem5::RegId::className(), gem5::RegId::classValue(), floatMap, gem5::FloatRegClass, intMap, gem5::IntRegClass, gem5::PhysRegId::is(), lookup(), gem5::MiscRegClass, panic, predMap, gem5::o3::SimpleRenameMap::setEntry(), gem5::VecElemClass, vecElemMap, vecMap, vecMode, gem5::VecPredRegClass, and gem5::VecRegClass.

Referenced by gem5::o3::Commit::commitHead(), gem5::o3::Rename::doSquash(), gem5::o3::CPU::insertThread(), and switchMode().

◆ switchFreeList()

void gem5::o3::UnifiedRenameMap::switchFreeList ( UnifiedFreeList freeList)

◆ switchMode()

void gem5::o3::UnifiedRenameMap::switchMode ( VecMode  newVecMode)

Member Data Documentation

◆ ccMap

SimpleRenameMap gem5::o3::UnifiedRenameMap::ccMap
private

The condition-code register rename map.

Definition at line 184 of file rename_map.hh.

Referenced by canRename(), init(), lookup(), numFreeCCEntries(), rename(), and setEntry().

◆ floatMap

SimpleRenameMap gem5::o3::UnifiedRenameMap::floatMap
private

The floating-point register rename map.

Definition at line 181 of file rename_map.hh.

Referenced by canRename(), init(), lookup(), numFreeEntries(), numFreeFloatEntries(), rename(), and setEntry().

◆ intMap

SimpleRenameMap gem5::o3::UnifiedRenameMap::intMap
private

The integer register rename map.

Definition at line 178 of file rename_map.hh.

Referenced by canRename(), init(), lookup(), numFreeEntries(), numFreeIntEntries(), rename(), and setEntry().

◆ predMap

SimpleRenameMap gem5::o3::UnifiedRenameMap::predMap
private

The predicate register rename map.

Definition at line 193 of file rename_map.hh.

Referenced by canRename(), init(), lookup(), numFreeEntries(), numFreePredEntries(), rename(), and setEntry().

◆ regFile

PhysRegFile* gem5::o3::UnifiedRenameMap::regFile
private

The register file object is used only to get PhysRegIdPtr on MiscRegs, as they are stored in it.

Definition at line 202 of file rename_map.hh.

Referenced by init(), lookup(), switchFreeList(), and switchMode().

◆ vecElemMap

SimpleRenameMap gem5::o3::UnifiedRenameMap::vecElemMap
private

The vector element register rename map.

Definition at line 190 of file rename_map.hh.

Referenced by canRename(), init(), lookup(), numFreeEntries(), numFreeVecEntries(), rename(), setEntry(), switchFreeList(), and switchMode().

◆ vecMap

SimpleRenameMap gem5::o3::UnifiedRenameMap::vecMap
private

The vector register rename map.

Definition at line 187 of file rename_map.hh.

Referenced by canRename(), init(), lookup(), numFreeEntries(), numFreeVecEntries(), rename(), setEntry(), switchFreeList(), and switchMode().

◆ vecMode

VecMode gem5::o3::UnifiedRenameMap::vecMode
private

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

Generated on Tue Sep 21 2021 12:31:47 for gem5 by doxygen 1.8.17