// popcount16() counts the non-zero bits using SWAR-Popcount algorithm
- uint8_t popcount16(uint16_t u) {
+ unsigned popcount16(unsigned u) {
u -= (u >> 1) & 0x5555U;
u = ((u >> 2) & 0x3333U) + (u & 0x3333U);
u = ((u >> 4) + u) & 0x0F0FU;
void Bitboards::init() {
for (unsigned i = 0; i < (1 << 16); ++i)
- PopCnt16[i] = popcount16(i);
+ PopCnt16[i] = (uint8_t) popcount16(i);
for (Square s = SQ_A1; s <= SQ_H8; ++s)
{
StepAttacksBB[make_piece(c, pt)][s] |= to;
}
- Square RookDeltas[] = { DELTA_N, DELTA_E, DELTA_S, DELTA_W };
- Square BishopDeltas[] = { DELTA_NE, DELTA_SE, DELTA_SW, DELTA_NW };
+ Square RookDeltas[] = { NORTH, EAST, SOUTH, WEST };
+ Square BishopDeltas[] = { NORTH_EAST, SOUTH_EAST, SOUTH_WEST, NORTH_WEST };
init_magics(RookTable, RookAttacks, RookMagics, RookMasks, RookShifts, RookDeltas, magic_index<ROOK>);
init_magics(BishopTable, BishopAttacks, BishopMagics, BishopMasks, BishopShifts, BishopDeltas, magic_index<BISHOP>);