#include "knight.h"
#include "compassrose.h"
#include "movedatabase.h"
#include "utils.h"
#include "board.h"
namespace Napoleon
{
BitBoard Knight::GetAllTargets(BitBoard knights, Board& board)
{
BitBoard targets = MoveDatabase::KnightAttacks[(Utils::BitBoard::BitScanForward(knights))];
return targets & ~board.GetPlayerPieces();
}
BitBoard Knight::GetKnightAttacks(BitBoard knights)
{
BitBoard west, east, attacks;
east = CompassRose::OneStepEast(knights);
west = CompassRose::OneStepWest(knights);
attacks = (east | west) << 16;
attacks |= (east | west) >> 16;
east = CompassRose::OneStepEast(east);
west = CompassRose::OneStepWest(west);
attacks |= (east | west) << 8;
attacks |= (east | west) >> 8;
return attacks;
}
}
