implemeneted general move generation method for knight moves

engine/src/bitboard/movegen.rs

@@ -4,6 +4,7 @@ mod knights;
 use super::board::Board;
 use super::movebuffer::MoveBuffer;
 use super::bitmove::BitMove;
+use super::utils::*;
 
 impl Board {
 

engine/src/bitboard/movegen/knights.rs

@@ -1 +1,36 @@
-use super::*;
+use super::*;
+
+impl Board {
+
+  fn add_knight_moves(&self, capture_buffer: &mut MoveBuffer, quiet_buffer: &mut MoveBuffer, move_mask: u64) {
+    let piece_index = 1 + self.side_to_move * 6;
+    let mut knights = self.bitboards[piece_index as usize];
+    let empty = !self.occupancy[2];
+    let opponents = self.occupancy[1 - self.side_to_move as usize];
+    while knights != 0 {
+      let from_sq = pop_lsb(&mut knights);
+      let raw_move_map = self.get_pseudo_knight_moves(from_sq) & move_mask;
+      let move_map = self.get_pin_masked_moves(raw_move_map, from_sq);
+
+      let mut quiet_map = move_map & empty;
+      let mut capture_map = move_map & opponents;
+
+      while quiet_map != 0 {
+        let to_sq = pop_lsb(&mut quiet_map);
+        quiet_buffer.add(BitMove::quiet(
+          from_sq as u8,
+          to_sq as u8,
+          None
+        ));
+      }
+      while capture_map != 0 {
+        let to_sq = pop_lsb(&mut capture_map);
+        capture_buffer.add(BitMove::capture(
+          from_sq as u8,
+          to_sq as u8,
+          None
+        ));
+      }
+    }
+  }
+}

engine/src/bitboard/movegen/pawns.rs

@@ -1,5 +1,3 @@
-use crate::bitboard::utils::pop_lsb;
-
 use super::*;
 
 impl Board {