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Introduce SERIALIZE_MOVES_D() macro and use it for pawn moves

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This is another moves serialization macro but this time
focused on pawn moves where the 'from' square is given as
a delta from the 'to' square.

No functional change.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2009-07-14 10:07:30 +02:00
parent 20ed03fc0b
commit 3849beb979
1 changed files with 11 additions and 35 deletions
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46
src/movegen.cpp
View file

@ -31,6 +31,9 @@
// hardcoded list name 'mlist' and from square 'from'.
#define SERIALIZE_MOVES(b) while (b) (*mlist++).move = make_move(from, pop_1st_bit(&b))
// Version used for pawns, where the 'from' square is given as a delta from the 'to' square
#define SERIALIZE_MOVES_D(b, d) while (b) { to = pop_1st_bit(&b); (*mlist++).move = make_move(to + (d), to); }
////
//// Local definitions
////
@ -638,11 +641,7 @@ namespace {
}
// Capturing non-promotions
while (b1)
{
to = pop_1st_bit(&b1);
(*mlist++).move = make_move(to - TTDELTA_NE, to);
}
SERIALIZE_MOVES_D(b1, -TTDELTA_NE);
return mlist;
}
@ -746,19 +745,11 @@ namespace {
// Single pawn pushes
b2 = b1 = move_pawns<Us, DELTA_N>(pawns) & emptySquares & ~TRank8BB;
while (b2)
{
to = pop_1st_bit(&b2);
(*mlist++).move = make_move(to - TDELTA_N, to);
}
SERIALIZE_MOVES_D(b2, -TDELTA_N);
// Double pawn pushes
b2 = move_pawns<Us, DELTA_N>(b1 & TRank3BB) & emptySquares;
while (b2)
{
to = pop_1st_bit(&b2);
(*mlist++).move = make_move(to - TDELTA_N - TDELTA_N, to);
}
SERIALIZE_MOVES_D(b2, -TDELTA_N -TDELTA_N);
return mlist;
}
@ -773,6 +764,7 @@ namespace {
const SquareDelta TDELTA_N = (Us == WHITE ? DELTA_N : DELTA_S);
const SquareDelta TDELTA_S = (Us == WHITE ? DELTA_S : DELTA_N);
Square to;
Bitboard b1, b2, b3;
Bitboard pawns = pos.pawns(Us);
@ -787,19 +779,11 @@ namespace {
// Discovered checks, single pawn pushes, no promotions
b2 = b3 = move_pawns<Us, DELTA_N>(b1 & dc) & empty & ~TRank8BB;
while (b3)
{
Square to = pop_1st_bit(&b3);
(*mlist++).move = make_move(to - TDELTA_N, to);
}
SERIALIZE_MOVES_D(b3, -TDELTA_N);
// Discovered checks, double pawn pushes
b3 = move_pawns<Us, DELTA_N>(b2 & TRank3BB) & empty;
while (b3)
{
Square to = pop_1st_bit(&b3);
(*mlist++).move = make_move(to - TDELTA_N - TDELTA_N, to);
}
SERIALIZE_MOVES_D(b3, -TDELTA_N -TDELTA_N);
}
// Direct checks. These are possible only for pawns on neighboring files
@ -816,19 +800,11 @@ namespace {
Bitboard empty = pos.empty_squares();
b2 = move_pawns<Us, DELTA_N>(b1) & empty;
b3 = b2 & pos.pawn_attacks(Them, ksq);
while (b3)
{
Square to = pop_1st_bit(&b3);
(*mlist++).move = make_move(to - TDELTA_N, to);
}
SERIALIZE_MOVES_D(b3, -TDELTA_N);
// Direct checks, double pawn pushes
b3 = move_pawns<Us, DELTA_N>(b2 & TRank3BB) & empty & pos.pawn_attacks(Them, ksq);
while (b3)
{
Square to = pop_1st_bit(&b3);
(*mlist++).move = make_move(to - TDELTA_N - TDELTA_N, to);
}
SERIALIZE_MOVES_D(b3, -TDELTA_N -TDELTA_N);
return mlist;
}