TT.h File Reference

Transposition Table implementation using a 3+1 Cluster Architecture. More...

#include "../Types.h"
#include <atomic>
#include <cstdint>
#include <optional>

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Classes
struct	TTEntry
	16-byte Transposition Table entry for search results. More...
struct	EvalEntry
	16-byte entry dedicated exclusively to caching static evaluations. More...
struct	Cluster
	64-byte cache-line aligned structure holding TT entries. More...
class	TranspositionTable
	The main Transposition Table. More...

Enumerations
enum class	Bound : uint8_t {   NONE = 0 , UPPER = 1 , LOWER = 2 , EXACT = 3 ,   LAZY_MASK = 4 }
	Represents the type of score stored in the Transposition Table. More...

Detailed Description

Transposition Table implementation using a 3+1 Cluster Architecture.

Implements a lockless Transposition Table (TT) utilizing 64-byte cache-line aligned clusters. Each cluster contains 3 search entries and 1 static evaluation entry. Data integrity is ensured using XOR checksum signatures.

Enumeration Type Documentation

Bound

enum class Bound : uint8_t

strong

Represents the type of score stored in the Transposition Table.

Enumerator
NONE	Invalid or empty bound.
UPPER	Score is an upper bound (failed low).
LOWER	Score is a lower bound (failed high).
EXACT	Score is exact (from a PV node).
LAZY_MASK	Flag indicating the entry was populated via lazy evaluation.