}
}
-
-/// Intel PEXT (parallel extraction) software implementation
-Bitboard pext(Bitboard b, Bitboard mask) {
-
- Bitboard res = 0;
-
- for (Bitboard bb = 1; mask; bb += bb)
- {
- if (b & mask & -mask)
- res |= bb;
-
- mask &= mask - 1;
- }
- return res;
-}
-
-
/// lsb()/msb() finds the least/most significant bit in a non-zero bitboard.
/// pop_lsb() finds and clears the least significant bit in a non-zero bitboard.
reference[size] = sliding_attack(deltas, s, b);
if (HasPext)
- attacks[s][pext(occupancy[size], masks[s])] = reference[size];
+ attacks[s][_pext_u64(b, masks[s])] = reference[size];
size++;
b = (b - masks[s]) & masks[s];