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Update lps to remove pext use #354

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Merged
87flowers merged 1 commit into from
Jan 19, 2026
Merged

Update lps to remove pext use #354

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31 changes: 16 additions & 15 deletions src/position.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -225,13 +225,13 @@ void Position::incrementally_move_piece(
u8x64 dst_at_lo = dst_slider_ids.swizzle(BITS_LO);
u8x64 dst_at_hi = dst_slider_ids.swizzle(BITS_HI);

u8x64 src_color0 = src_col.to_vector().zip_low_128lanes(src_col.to_vector());
u8x64 src_color1 = src_col.to_vector().zip_high_128lanes(src_col.to_vector());
u8x64 dst_color0 = dst_col.to_vector().zip_low_128lanes(dst_col.to_vector());
u8x64 dst_color1 = dst_col.to_vector().zip_high_128lanes(dst_col.to_vector());
i8x64 src_color0 = src_col.to_vector().zip_low_128lanes(src_col.to_vector());
i8x64 src_color1 = src_col.to_vector().zip_high_128lanes(src_col.to_vector());
i8x64 dst_color0 = dst_col.to_vector().zip_low_128lanes(dst_col.to_vector());
i8x64 dst_color1 = dst_col.to_vector().zip_high_128lanes(dst_col.to_vector());

u16x64 src_color = std::bit_cast<u16x64>(std::array<u8x64, 2>{src_color0, src_color1});
u16x64 dst_color = std::bit_cast<u16x64>(std::array<u8x64, 2>{dst_color0, dst_color1});
u16x64 src_color = std::bit_cast<u16x64>(std::array<i8x64, 2>{src_color0, src_color1});
u16x64 dst_color = std::bit_cast<u16x64>(std::array<i8x64, 2>{dst_color0, dst_color1});

u8x64 src_at0 = src_at_lo.zip_low_128lanes(src_at_hi);
u8x64 src_at1 = src_at_lo.zip_high_128lanes(src_at_hi);
Expand Down Expand Up @@ -303,9 +303,9 @@ m8x64 Position::toggle_rays(Square sq) {
u8x64 at_lo = slider_ids.swizzle(BITS_LO);
u8x64 at_hi = slider_ids.swizzle(BITS_HI);

u8x64 color0 = col.to_vector().zip_low_128lanes(col.to_vector());
u8x64 color1 = col.to_vector().zip_high_128lanes(col.to_vector());
u16x64 color = std::bit_cast<u16x64>(std::array<u8x64, 2>{color0, color1});
i8x64 color0 = col.to_vector().zip_low_128lanes(col.to_vector());
i8x64 color1 = col.to_vector().zip_high_128lanes(col.to_vector());
u16x64 color = std::bit_cast<u16x64>(std::array<i8x64, 2>{color0, color1});

u8x64 at0 = at_lo.zip_low_128lanes(at_hi);
u8x64 at1 = at_lo.zip_high_128lanes(at_hi);
Expand Down Expand Up @@ -356,11 +356,11 @@ void Position::add_attacks(bool color, PieceId id, Square sq, PieceType ptype, m
m_attack_table[color].raw |= m16x64{moves.raw}.mask(bit);
#else
m8x64 moves = mask & geometry::piece_moves_avx2(color, ptype, sq);
u8x64 moves_vec = moves.to_vector();
i8x64 moves_vec = moves.to_vector();

u8x64 m0 = moves_vec.zip_low_128lanes(moves_vec);
u8x64 m1 = moves_vec.zip_high_128lanes(moves_vec);
u16x64 m = std::bit_cast<u16x64>(std::array<u8x64, 2>{m0, m1});
i8x64 m0 = moves_vec.zip_low_128lanes(moves_vec);
i8x64 m1 = moves_vec.zip_high_128lanes(moves_vec);
u16x64 m = std::bit_cast<u16x64>(std::array<i8x64, 2>{m0, m1});

m_attack_table[color].raw |= m & bit;
#endif
Expand Down Expand Up @@ -572,8 +572,9 @@ std::tuple<Wordboard, Bitboard> Position::calc_pin_mask() const {
m8x64 maybe_pinner1 = enemy & geometry::slider_mask(ray_places);

// Find second-closest pieces along each ray
m8x64 not_closest = occupied.andnot(closest);
m8x64 pin_raymask = geometry::superpiece_attacks(not_closest.to_vector(), ray_valid);
m8x64 not_closest = occupied.andnot(closest);
m8x64 pin_raymask =
geometry::superpiece_attacks(not_closest.to_vector().convert<u8>(), ray_valid);
m8x64 maybe_pinner2 = not_closest & pin_raymask;

// Pinners are second-closest pieces that are enemy sliders of the correct type.
Expand Down
2 changes: 1 addition & 1 deletion vendor/lps_commit.txt
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Original file line number Diff line number Diff line change
@@ -1 +1 @@
8450326384ed77166e8fea25410f898c98a29cee
b1d320bd48c7daa61839879d70195596e3102ab6
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