mirror of
https://github.com/opelly27/Stockfish.git
synced 2026-05-20 12:07:43 +00:00
Tomasz Sobczyk
41 lines
1.4 KiB
C++
41 lines
1.4 KiB
C++
#ifndef _NNUE_FEATURES_ENPASSANT_H_
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#define _NNUE_FEATURES_ENPASSANT_H_
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#include "features_common.h"
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#include "evaluate.h"
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//Definition of input feature quantity EnPassant of NNUE evaluation function
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namespace Eval::NNUE::Features {
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class EnPassant {
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public:
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// feature quantity name
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static constexpr const char* kName = "EnPassant";
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// Hash value embedded in the evaluation function file
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static constexpr std::uint32_t kHashValue = 0x02924F91u;
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// number of feature dimensions
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static constexpr IndexType kDimensions = 8;
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// The maximum value of the number of indexes whose value is 1 at the same time among the feature values
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static constexpr IndexType kMaxActiveDimensions = 1;
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// Timing of full calculation instead of difference calculation
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static constexpr TriggerEvent kRefreshTrigger = TriggerEvent::kNone;
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// Get a list of indices with a value of 1 among the features
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static void append_active_indices(
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const Position& pos,
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Color perspective,
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IndexList* active);
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// Get a list of indices whose values have changed from the previous one in the feature quantity
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static void append_changed_indices(
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const Position& pos,
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Color perspective,
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IndexList* removed,
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IndexList* added);
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};
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} // namespace Eval::NNUE::Features
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#endif
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