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add in-between masks (with/without dest square. TODO: keep only one !)

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Bruno Raoult
2024-02-26 19:14:20 +01:00
parent e50d9a73e6
commit ca4e274957
5 changed files with 127 additions and 36 deletions
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12
src/hyperbola-quintessence.c
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@@ -44,7 +44,7 @@ uchar bb_rank_attacks[64 * 8];
* 2) shift left result 2 more bits, as bit 0 is unused and already cleared:
* (O <<= 2)
*
* TODO ? create masks excluding slider (eg. bb_diagonal ^ bb_sq[square]),
* TODO ? create masks excluding slider (eg. bb_diag ^ bb_sq[square]),
* to save one operation in hyperbola_moves().
* TODO ? replace rank attack with this idea, mapping rank to diagonal ?
* See http://timcooijmans.blogspot.com/2014/04/
@@ -122,19 +122,19 @@ static bitboard_t hyperbola_file_moves(bitboard_t occ, square_t sq)
return hyperbola_moves(occ, bb_file[sq], sq);
}
static bitboard_t hyperbola_diagonal_moves(bitboard_t occ, square_t sq)
static bitboard_t hyperbola_diag_moves(bitboard_t occ, square_t sq)
{
return hyperbola_moves(occ, bb_diagonal[sq], sq);
return hyperbola_moves(occ, bb_diag[sq], sq);
}
static bitboard_t hyperbola_antidiagonal_moves(bitboard_t occ, square_t sq)
static bitboard_t hyperbola_anti_moves(bitboard_t occ, square_t sq)
{
return hyperbola_moves(occ, bb_antidiagonal[sq], sq);
return hyperbola_moves(occ, bb_anti[sq], sq);
}
bitboard_t hyperbola_bishop_moves(bitboard_t occ, square_t sq)
{
return hyperbola_diagonal_moves(occ, sq) + hyperbola_antidiagonal_moves(occ, sq);
return hyperbola_diag_moves(occ, sq) + hyperbola_anti_moves(occ, sq);
}
bitboard_t hyperbola_rook_moves(bitboard_t occ, square_t sq)