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aea08de018
Files in /eval, /extra, & /learn - comments translated from Japanese to English
53 lines
1.5 KiB
C++
53 lines
1.5 KiB
C++
//Definition of input feature P of NNUE evaluation function
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#if defined(EVAL_NNUE)
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#include "p.h"
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#include "index_list.h"
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namespace Eval {
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namespace NNUE {
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namespace Features {
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// Get a list of indices with a value of 1 among the features
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void P::AppendActiveIndices(
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const Position& pos, Color perspective, IndexList* active) {
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// do nothing if array size is small to avoid compiler warning
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if (RawFeatures::kMaxActiveDimensions < kMaxActiveDimensions) return;
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const BonaPiece* pieces = (perspective == BLACK) ?
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pos.eval_list()->piece_list_fb() :
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pos.eval_list()->piece_list_fw();
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for (PieceNumber i = PIECE_NUMBER_ZERO; i < PIECE_NUMBER_KING; ++i) {
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if (pieces[i] != Eval::BONA_PIECE_ZERO) {
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active->push_back(pieces[i]);
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}
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}
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}
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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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void P::AppendChangedIndices(
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const Position& pos, Color perspective,
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IndexList* removed, IndexList* added) {
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const auto& dp = pos.state()->dirtyPiece;
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for (int i = 0; i < dp.dirty_num; ++i) {
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if (dp.pieceNo[i] >= PIECE_NUMBER_KING) continue;
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if (dp.changed_piece[i].old_piece.from[perspective] != Eval::BONA_PIECE_ZERO) {
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removed->push_back(dp.changed_piece[i].old_piece.from[perspective]);
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}
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if (dp.changed_piece[i].new_piece.from[perspective] != Eval::BONA_PIECE_ZERO) {
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added->push_back(dp.changed_piece[i].new_piece.from[perspective]);
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}
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}
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}
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} // namespace Features
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} // namespace NNUE
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} // namespace Eval
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#endif // defined(EVAL_NNUE)
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