gem5::decode_cache::AddrMap< Value, CacheChunkShift > Class Template Reference

A sparse map from an Addr to a Value, stored in page chunks. More...

#include <decode_cache.hh>

Classes
struct	CacheChunk

Public Member Functions
	AddrMap ()
	Constructor.
Value &	lookup (Addr addr)

Protected Types
typedef std::unordered_map< Addr, CacheChunk * >	ChunkMap
typedef ChunkMap::iterator	ChunkIt

Protected Member Functions
void	update (ChunkIt recentest)
	Update the mini cache of recent lookups.
CacheChunk *	getChunk (Addr addr)
	Attempt to find the CacheChunk which goes with a particular address.

Static Protected Member Functions
static constexpr Addr	chunkOffset (Addr addr)
static constexpr Addr	chunkStart (Addr addr)

Protected Attributes
ChunkIt	recent [2]
ChunkMap	chunkMap

Static Protected Attributes
static constexpr Addr	CacheChunkBytes = 1ULL << CacheChunkShift

Detailed Description

template<class Value, Addr CacheChunkShift = 12>
class gem5::decode_cache::AddrMap< Value, CacheChunkShift >

A sparse map from an Addr to a Value, stored in page chunks.

Definition at line 50 of file decode_cache.hh.

Member Typedef Documentation

ChunkIt

template<class Value , Addr CacheChunkShift = 12>

typedef ChunkMap::iterator gem5::decode_cache::AddrMap< Value, CacheChunkShift >::ChunkIt

protected

Definition at line 74 of file decode_cache.hh.

ChunkMap

template<class Value , Addr CacheChunkShift = 12>

typedef std::unordered_map<Addr, CacheChunk *> gem5::decode_cache::AddrMap< Value, CacheChunkShift >::ChunkMap

protected

Definition at line 73 of file decode_cache.hh.

Constructor & Destructor Documentation

AddrMap()

template<class Value , Addr CacheChunkShift = 12>

gem5::decode_cache::AddrMap< Value, CacheChunkShift >::AddrMap ( )

inline

Constructor.

Definition at line 125 of file decode_cache.hh.

References gem5::decode_cache::AddrMap< Value, CacheChunkShift >::chunkMap, and gem5::decode_cache::AddrMap< Value, CacheChunkShift >::recent.

Member Function Documentation

chunkOffset()

template<class Value , Addr CacheChunkShift = 12>

static constexpr Addr gem5::decode_cache::AddrMap< Value, CacheChunkShift >::chunkOffset ( Addr addr )

inlinestaticconstexprprotected

Definition at line 56 of file decode_cache.hh.

References gem5::X86ISA::addr, and gem5::decode_cache::AddrMap< Value, CacheChunkShift >::CacheChunkBytes.

Referenced by gem5::decode_cache::AddrMap< Value, CacheChunkShift >::lookup().

chunkStart()

template<class Value , Addr CacheChunkShift = 12>

static constexpr Addr gem5::decode_cache::AddrMap< Value, CacheChunkShift >::chunkStart ( Addr addr )

inlinestaticconstexprprotected

Definition at line 62 of file decode_cache.hh.

References gem5::X86ISA::addr, and gem5::decode_cache::AddrMap< Value, CacheChunkShift >::CacheChunkBytes.

Referenced by gem5::decode_cache::AddrMap< Value, CacheChunkShift >::getChunk().

getChunk()

template<class Value , Addr CacheChunkShift = 12>

CacheChunk * gem5::decode_cache::AddrMap< Value, CacheChunkShift >::getChunk ( Addr addr )

inlineprotected

Attempt to find the CacheChunk which goes with a particular address.

First check the small cache of recent results, then actually look in the hash map.

Parameters

addr	The address to look up.

Definition at line 93 of file decode_cache.hh.

References gem5::X86ISA::addr, gem5::decode_cache::AddrMap< Value, CacheChunkShift >::chunkMap, gem5::decode_cache::AddrMap< Value, CacheChunkShift >::chunkStart(), gem5::decode_cache::AddrMap< Value, CacheChunkShift >::recent, and gem5::decode_cache::AddrMap< Value, CacheChunkShift >::update().

Referenced by gem5::decode_cache::AddrMap< Value, CacheChunkShift >::lookup().

lookup()

template<class Value , Addr CacheChunkShift = 12>

Value & gem5::decode_cache::AddrMap< Value, CacheChunkShift >::lookup ( Addr addr )

inline

Definition at line 131 of file decode_cache.hh.

References gem5::X86ISA::addr, gem5::decode_cache::AddrMap< Value, CacheChunkShift >::chunkOffset(), gem5::decode_cache::AddrMap< Value, CacheChunkShift >::getChunk(), and gem5::decode_cache::AddrMap< Value, CacheChunkShift >::CacheChunk::items.

Referenced by gem5::X86ISA::Decoder::doResetState().

update()

template<class Value , Addr CacheChunkShift = 12>

void gem5::decode_cache::AddrMap< Value, CacheChunkShift >::update ( ChunkIt recentest )

inlineprotected

Update the mini cache of recent lookups.

Parameters

recentest

The most recent result;

Definition at line 82 of file decode_cache.hh.

References gem5::decode_cache::AddrMap< Value, CacheChunkShift >::recent.

Referenced by gem5::decode_cache::AddrMap< Value, CacheChunkShift >::getChunk().

Member Data Documentation

CacheChunkBytes

template<class Value , Addr CacheChunkShift = 12>

Addr gem5::decode_cache::AddrMap< Value, CacheChunkShift >::CacheChunkBytes = 1ULL << CacheChunkShift

staticconstexprprotected

Definition at line 53 of file decode_cache.hh.

Referenced by gem5::decode_cache::AddrMap< Value, CacheChunkShift >::chunkOffset(), and gem5::decode_cache::AddrMap< Value, CacheChunkShift >::chunkStart().

chunkMap

template<class Value , Addr CacheChunkShift = 12>

ChunkMap gem5::decode_cache::AddrMap< Value, CacheChunkShift >::chunkMap

protected

Definition at line 77 of file decode_cache.hh.

Referenced by gem5::decode_cache::AddrMap< Value, CacheChunkShift >::AddrMap(), and gem5::decode_cache::AddrMap< Value, CacheChunkShift >::getChunk().

recent

template<class Value , Addr CacheChunkShift = 12>

ChunkIt gem5::decode_cache::AddrMap< Value, CacheChunkShift >::recent[2]

protected

Definition at line 76 of file decode_cache.hh.

Referenced by gem5::decode_cache::AddrMap< Value, CacheChunkShift >::AddrMap(), gem5::decode_cache::AddrMap< Value, CacheChunkShift >::getChunk(), and gem5::decode_cache::AddrMap< Value, CacheChunkShift >::update().

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

• cpu/decode_cache.hh