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optimize make routine

This commit is contained in:
Quinten Kock 2020-06-19 03:39:27 +02:00
parent c54e2b9e1a
commit dd9acb7295
1 changed files with 9 additions and 9 deletions
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18
Board.h
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@ -135,8 +135,9 @@ void make(Move m) {
u.sq_to = m.sq_to;
byte piece_type = field[m.sq_from] & 0x7;
byte color = black_moving();
if(u.captured || piece_type == W_PAWN) {
if(field[m.sq_to] || piece_type == W_PAWN) {
field[PTR_REVMOV] = 0;
} else {
field[PTR_REVMOV]++;
@ -153,7 +154,7 @@ void make(Move m) {
// We are castling! After all, a king cannot move
// more than one position except when castling.
// Since we don't care about legality; just do it
byte castle_source = 0x70*black_moving();
byte castle_source = (color ? 0x70 : 0x0);
if(sq_diff == 2) {
castle_source += 0x7;
}
@ -164,7 +165,7 @@ void make(Move m) {
// Handle castling rights
// First store the current rights in the unmove
byte our_rights = field[PTR_SIDE_AND_CASTLERIGHT] >> (1 + 2*black_moving());
byte our_rights = field[PTR_SIDE_AND_CASTLERIGHT] >> (color ? 3 : 1);
if(our_rights & 0b10) // kingside allowed
u.sq_from |= 0x80;
if(our_rights & 0b01) // queenside allowed
@ -192,11 +193,11 @@ void make(Move m) {
field[PTR_ENPASSANT] &&
piece_type == W_PAWN &&
(m.sq_to & 0x7) == (field[PTR_ENPASSANT] & 0x7) &&
(m.sq_to & 0x70) == (0x50 - 0x30*black_moving())
(m.sq_to & 0x70) == (color ? 0x20 : 0x50)
) {
// all EP-conditions are met
// therefore, delete the EP-vurnerable pawn
byte ep_field = m.sq_to - 16 + 32*black_moving();
byte ep_field = m.sq_to + (color ? 16 : -16);
field[ep_field] = P_EMPTY;
// also put information that we did an EP-capture
u.sq_to |= 0x08;
@ -217,15 +218,14 @@ void make(Move m) {
// are we promoting?
byte new_val = m.pc_prom & 0b1111;
if(new_val != P_EMPTY) {
if(m.pc_prom != P_EMPTY) {
// promoting; indicate this in the sq_to byte in unmove.
field[m.sq_to] = m.pc_prom;
u.sq_to |= 0x80;
} else {
// not promoting; so keep the same piece type
new_val = field[m.sq_from];
field[m.sq_to] = field[m.sq_from];
}
// copy or promote our piece.
field[m.sq_to] = new_val;
// then delete the original copy.
field[m.sq_from] = P_EMPTY;