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use crate::bitboard::{BitBoard, EMPTY};
use crate::color::Color;
use crate::file::File;
use crate::rank::Rank;
use crate::square::Square;
#[cfg(target_feature = "bmi2")]
use std::arch::x86_64::{_pdep_u64, _pext_u64};
include!(concat!(env!("OUT_DIR"), "/magic_gen.rs"));
pub fn get_bishop_rays(sq: Square) -> BitBoard {
unsafe { *RAYS.get_unchecked(BISHOP).get_unchecked(sq.to_index()) }
}
pub fn get_rook_rays(sq: Square) -> BitBoard {
unsafe { *RAYS.get_unchecked(ROOK).get_unchecked(sq.to_index()) }
}
pub fn get_rook_moves(sq: Square, blockers: BitBoard) -> BitBoard {
unsafe {
let magic: Magic = *MAGIC_NUMBERS
.get_unchecked(ROOK)
.get_unchecked(sq.to_int() as usize);
*MOVES.get_unchecked(
(magic.offset as usize)
+ (magic.magic_number * (blockers & magic.mask)).to_size(magic.rightshift),
) & get_rook_rays(sq)
}
}
#[cfg(target_feature = "bmi2")]
pub fn get_rook_moves_bmi(sq: Square, blockers: BitBoard) -> BitBoard {
unsafe {
let bmi2_magic = *ROOK_BMI_MASK.get_unchecked(sq.to_int() as usize);
let index = (_pext_u64(blockers.0, bmi2_magic.blockers_mask.0) as usize)
+ (bmi2_magic.offset as usize);
let result = _pdep_u64(
*BMI_MOVES.get_unchecked(index as usize) as u64,
get_rook_rays(sq).0,
);
return BitBoard(result);
}
}
pub fn get_bishop_moves(sq: Square, blockers: BitBoard) -> BitBoard {
unsafe {
let magic: Magic = *MAGIC_NUMBERS
.get_unchecked(BISHOP)
.get_unchecked(sq.to_int() as usize);
*MOVES.get_unchecked(
(magic.offset as usize)
+ (magic.magic_number * (blockers & magic.mask)).to_size(magic.rightshift),
) & get_bishop_rays(sq)
}
}
#[cfg(target_feature = "bmi2")]
pub fn get_bishop_moves_bmi(sq: Square, blockers: BitBoard) -> BitBoard {
unsafe {
let bmi2_magic = *BISHOP_BMI_MASK.get_unchecked(sq.to_int() as usize);
let index = (_pext_u64(blockers.0, bmi2_magic.blockers_mask.0) as usize)
+ (bmi2_magic.offset as usize);
let result = _pdep_u64(
*BMI_MOVES.get_unchecked(index as usize) as u64,
get_bishop_rays(sq).0,
);
return BitBoard(result);
}
}
pub fn get_king_moves(sq: Square) -> BitBoard {
unsafe { *KING_MOVES.get_unchecked(sq.to_index()) }
}
pub fn get_knight_moves(sq: Square) -> BitBoard {
unsafe { *KNIGHT_MOVES.get_unchecked(sq.to_index()) }
}
pub fn get_pawn_attacks(sq: Square, color: Color, blockers: BitBoard) -> BitBoard {
unsafe {
*PAWN_ATTACKS
.get_unchecked(color.to_index())
.get_unchecked(sq.to_index())
& blockers
}
}
pub fn get_castle_moves() -> BitBoard {
CASTLE_MOVES
}
pub fn get_pawn_quiets(sq: Square, color: Color, blockers: BitBoard) -> BitBoard {
unsafe {
if (BitBoard::from_square(sq.uforward(color)) & blockers) != EMPTY {
EMPTY
} else {
*PAWN_MOVES
.get_unchecked(color.to_index())
.get_unchecked(sq.to_index())
& !blockers
}
}
}
pub fn get_pawn_moves(sq: Square, color: Color, blockers: BitBoard) -> BitBoard {
get_pawn_attacks(sq, color, blockers) ^ get_pawn_quiets(sq, color, blockers)
}
pub fn line(sq1: Square, sq2: Square) -> BitBoard {
unsafe {
*LINE
.get_unchecked(sq1.to_index())
.get_unchecked(sq2.to_index())
}
}
pub fn between(sq1: Square, sq2: Square) -> BitBoard {
unsafe {
*BETWEEN
.get_unchecked(sq1.to_index())
.get_unchecked(sq2.to_index())
}
}
pub fn get_rank(rank: Rank) -> BitBoard {
unsafe { *RANKS.get_unchecked(rank.to_index()) }
}
pub fn get_file(file: File) -> BitBoard {
unsafe { *FILES.get_unchecked(file.to_index()) }
}
pub fn get_adjacent_files(file: File) -> BitBoard {
unsafe { *ADJACENT_FILES.get_unchecked(file.to_index()) }
}
pub fn get_pawn_source_double_moves() -> BitBoard {
PAWN_SOURCE_DOUBLE_MOVES
}
pub fn get_pawn_dest_double_moves() -> BitBoard {
PAWN_DEST_DOUBLE_MOVES
}