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rtbver.c
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rtbver.c
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/*
Copyright (c) 2011-2013 Ronald de Man
This file is distributed under the terms of the GNU GPL, version 2.
*/
#define DRAW_RULE (2 * 50)
int probe_tb(int *pieces, int *pos, int wtm, bitboard occ, int alpha, int beta);
#define SET_CAPT_VALUE(x,v) \
{ ubyte dummy = v; \
__asm__( \
"movb %0, %%al\n" \
"0:\n\t" \
"cmpb %1, %%al\n\t" \
"jge 1f\n\t" \
"lock cmpxchgb %1, %0\n\t" \
"jnz 0b\n" \
"1:" \
: "+m" (x), "+r" (dummy) : : "eax"); }
#define SET_CAPT_LOSS(x) \
{ ubyte dummy = CAPT_LOSS; \
__asm__( \
"movb %0, %%al\n" \
"0:\n\t" \
"testb %%al, %%al\n" \
"jnz 0f\n\t" \
"lock cmpxchgb %1, %0\n\t" \
"0:" \
: "+m" (x), "+r" (dummy) : : "eax"); }
#define CAPT_MATE 1
#define CAPT_LOSS 2
#define CAPT_CLOSS 3
#define CAPT_DRAW 4
#define CAPT_CWIN 5
#define CAPT_WIN 6
// for WDL only:
#define W_ILLEGAL 0
#define W_CAPT_WIN 1
#define W_WIN 2
#define W_CAPT_CWIN 3
#define W_CWIN 4
#define W_DRAW 5
#define W_CAPT_DRAW 6
#define W_CLOSS 7
#define W_CAPT_CLOSS 8
#define W_LOSS 9
#define W_CAPT_LOSS 10
#define W_MATE 11
#define W_BROKEN 12
#define W_ERROR 13
static ubyte w_wdl_matrix[5][8] = {
{ W_LOSS, W_MATE, W_CAPT_LOSS, W_CAPT_CLOSS, W_CAPT_DRAW, W_CAPT_CWIN, W_CAPT_WIN, 0 },
{ W_CLOSS, W_ERROR, W_CLOSS, W_CAPT_CLOSS, W_CAPT_DRAW, W_CAPT_CWIN, W_CAPT_WIN, 0 },
{ W_DRAW, W_ERROR, W_DRAW, W_DRAW, W_CAPT_DRAW, W_CAPT_CWIN, W_CAPT_WIN, 0 },
{ W_CWIN, W_ERROR, W_CWIN, W_CWIN, W_CWIN, W_CAPT_CWIN, W_CAPT_WIN, 0 },
{ W_WIN, W_ERROR, W_WIN, W_WIN, W_WIN, W_WIN, W_CAPT_WIN, 0 }
};
static ubyte w_ilbrok[2] = {
W_ILLEGAL, W_BROKEN
};
static ubyte w_skip[14];
// no DTZ value required for:
// WDL_ERROR, WDL_DRAW, WDL_DRAW_C, WDL_CWIN_C, WDL_WIN_C, WDL_ILLEGAL, WDL_BROKEN
#define WDL_ERROR 7
#define WDL_MATE 0
#define WDL_LOSS 1
#define WDL_CAPT_LOSS 2
#define WDL_CLOSS 3
#define WDL_CAPT_CLOSS 4
#define WDL_DRAW 8
#define WDL_CAPT_DRAW 9
#define WDL_CWIN 5
#define WDL_CAPT_CWIN 10
#define WDL_WIN 6
#define WDL_CAPT_WIN 11
#define WDL_ILLEGAL 12
#define WDL_BROKEN 13
// really a 5x7 matrix
static ubyte wdl_matrix[5][8] = {
{ WDL_LOSS, WDL_MATE, WDL_CAPT_LOSS, WDL_CAPT_CLOSS, WDL_CAPT_DRAW, WDL_CAPT_CWIN, WDL_CAPT_WIN, 0 },
{ WDL_CLOSS, WDL_ERROR, WDL_CLOSS, WDL_CAPT_CLOSS, WDL_CAPT_DRAW, WDL_CAPT_CWIN, WDL_CAPT_WIN, 0 },
{ WDL_DRAW, WDL_ERROR, WDL_DRAW, WDL_DRAW, WDL_CAPT_DRAW, WDL_CAPT_CWIN, WDL_CAPT_WIN, 0 },
{ WDL_CWIN, WDL_ERROR, WDL_CWIN, WDL_CWIN, WDL_CWIN, WDL_CAPT_CWIN, WDL_CAPT_WIN, 0 },
{ WDL_WIN, WDL_ERROR, WDL_WIN, WDL_WIN, WDL_WIN, WDL_WIN, WDL_CAPT_WIN, 0 }
};
static int wdl_tbl_to_wdl[] = {
1, 1, 1, 3, 3, 2, 0, 0, 0, 0, 0, 0
};
#define DTZ_BROKEN 255
#define DTZ_ERROR 254 // CHECK!
#define DTZ_ILLEGAL 0
#define DTZ_CAPT_WIN 1
#define DTZ_BASE_WIN 2
int dtz_capt_cwin;
int dtz_base_cwin;
int dtz_draw;
int dtz_capt_draw;
#define DTZ_MATE 253
#define DTZ_CAPT_LOSS 252
#define DTZ_BASE_LOSS 252
int dtz_capt_closs;
int dtz_base_closs;
int max_dtz_cursed;
int opp_capt_cwin, opp_base_cwin, opp_draw, opp_capt_draw;
int opp_capt_closs, opp_base_closs;
// mapping for WDL_ERROR - WDL_BROKEN (7-13)
static ubyte wdl_to_dtz_c[7];
// mapping for WDL_LOSS - WDL_WIN (0-6)
static ubyte wdl_to_dtz[7][256];
static ubyte dtz_to_opp[12][256];
static ubyte dtz_matrix[256][256];
static ubyte w_matrix[16][16];
static void init_wdl_dtz(void)
{
int i, j;
int win_num, loss_num;
win_num = ply_accurate_win ? DRAW_RULE : (DRAW_RULE / 2);
loss_num = ply_accurate_loss ? DRAW_RULE : (DRAW_RULE / 2);
dtz_capt_cwin = DTZ_BASE_WIN + 1 + win_num;
dtz_capt_closs = DTZ_BASE_LOSS - 1 - loss_num;
opp_capt_cwin = DTZ_BASE_WIN + 1 + loss_num;
opp_capt_closs = DTZ_BASE_LOSS - 1 - win_num;
dtz_base_cwin = dtz_capt_cwin + 1;
dtz_base_closs = dtz_capt_closs - 1;
opp_base_cwin = opp_capt_cwin + 1;
opp_base_closs = opp_capt_closs - 1;
max_dtz_cursed = (dtz_base_closs - dtz_base_cwin - 1) / 2 - 1;
dtz_draw = dtz_base_cwin + max_dtz_cursed + 1;
dtz_capt_draw = dtz_draw + 1;
opp_draw = opp_base_cwin + max_dtz_cursed + 1;
opp_capt_draw = opp_draw + 1;
#if 0
printf("max_dtz_cursed = %d\n", max_dtz_cursed);
printf("dtz_base_cwin = %d\n", dtz_base_cwin);
printf("dtz_draw = %d\n", dtz_draw);
printf("dtz_capt_draw = %d\n", dtz_capt_draw);
printf("dtz_base_closs = %d\n", dtz_base_closs);
printf("opp_base_cwin = %d\n", opp_base_cwin);
printf("opp_draw = %d\n", opp_draw);
printf("opp_capt_draw = %d\n", opp_capt_draw);
printf("opp_base_closs = %d\n", opp_base_closs);
#endif
wdl_to_dtz_c[WDL_ERROR - WDL_ERROR] = DTZ_ERROR;
wdl_to_dtz_c[WDL_DRAW - WDL_ERROR] = dtz_draw;
wdl_to_dtz_c[WDL_CAPT_DRAW - WDL_ERROR] = dtz_capt_draw;
wdl_to_dtz_c[WDL_CAPT_CWIN - WDL_ERROR] = dtz_capt_cwin;
wdl_to_dtz_c[WDL_CAPT_WIN - WDL_ERROR] = DTZ_CAPT_WIN;
wdl_to_dtz_c[WDL_ILLEGAL - WDL_ERROR] = DTZ_ILLEGAL;
wdl_to_dtz_c[WDL_BROKEN - WDL_ERROR] = DTZ_BROKEN;
for (i = 0; i < 7; i++)
for (j = 0; j < 256; j++)
wdl_to_dtz[i][j] = DTZ_ERROR;
wdl_to_dtz[WDL_MATE][0] = DTZ_MATE;
for (i = 0; i < win_num; i++)
wdl_to_dtz[WDL_WIN][i] = DTZ_BASE_WIN + 1 + i;
for (; i < 256; i++)
wdl_to_dtz[WDL_WIN][i] = DTZ_ERROR;
for (i = 0; i < max_dtz_cursed; i++)
wdl_to_dtz[WDL_CWIN][i] = dtz_base_cwin + i;
for (; i < 256; i++)
wdl_to_dtz[WDL_CWIN][i] = dtz_base_cwin + max_dtz_cursed;
for (i = 0; i < loss_num; i++)
wdl_to_dtz[WDL_LOSS][i] = DTZ_BASE_LOSS - 1 - i;
for (; i < 256; i++)
wdl_to_dtz[WDL_LOSS][i] = DTZ_ERROR;
wdl_to_dtz[WDL_CAPT_LOSS][0] = DTZ_CAPT_LOSS;
for (i = 1; i < loss_num; i++)
wdl_to_dtz[WDL_CAPT_LOSS][i] = DTZ_BASE_LOSS - 1 - i;
for (; i < 256; i++)
wdl_to_dtz[WDL_CAPT_LOSS][i] = DTZ_ERROR;
for (i = 0; i < max_dtz_cursed; i++)
wdl_to_dtz[WDL_CLOSS][i] = dtz_base_closs - i;
for (; i < 256; i++)
wdl_to_dtz[WDL_CLOSS][i] = dtz_base_closs - max_dtz_cursed;
wdl_to_dtz[WDL_CAPT_CLOSS][0] = dtz_capt_closs;
for (i = 1; i < max_dtz_cursed; i++)
wdl_to_dtz[WDL_CAPT_CLOSS][i] = dtz_base_closs - i;
for (; i < 256; i++)
wdl_to_dtz[WDL_CAPT_CLOSS][i] = dtz_base_closs - max_dtz_cursed;
for (i = 0; i < 12; i++)
for (j = 0; j < 256; j++)
dtz_to_opp[i][j] = DTZ_ERROR;
// WDL_MATE
dtz_to_opp[WDL_MATE][DTZ_ILLEGAL] = DTZ_MATE;
// WDL_DRAW
dtz_to_opp[WDL_DRAW][DTZ_ILLEGAL] = opp_draw;
dtz_to_opp[WDL_DRAW][dtz_draw] = opp_draw;
dtz_to_opp[WDL_DRAW][dtz_capt_draw] = opp_draw;
// WDL_CAPT_DRAW
dtz_to_opp[WDL_CAPT_DRAW][DTZ_ILLEGAL] = opp_capt_draw;
for (i = DTZ_CAPT_WIN; i <= dtz_capt_draw; i++)
dtz_to_opp[WDL_CAPT_DRAW][i] = opp_capt_draw;
// WDL_WIN
dtz_to_opp[WDL_WIN][DTZ_MATE] = DTZ_BASE_WIN; // special case
if (ply_accurate_loss) {
dtz_to_opp[WDL_WIN][DTZ_CAPT_LOSS] = DTZ_BASE_WIN + 2;
for (i = 0; i < loss_num - 1; i++)
dtz_to_opp[WDL_WIN][DTZ_BASE_LOSS - i - 1] = DTZ_BASE_WIN + i + 2;
} else {
dtz_to_opp[WDL_WIN][DTZ_CAPT_LOSS] = DTZ_BASE_WIN + 1;
for (i = 0; i < loss_num; i++)
dtz_to_opp[WDL_WIN][DTZ_BASE_LOSS - i - 1] = DTZ_BASE_WIN + i + 1;
}
// WDL_CAPT_WIN
dtz_to_opp[WDL_CAPT_WIN][DTZ_ILLEGAL] = DTZ_CAPT_WIN;
for (i = DTZ_CAPT_WIN; i <= DTZ_MATE; i++)
dtz_to_opp[WDL_CAPT_WIN][i] = DTZ_CAPT_WIN;
// WDL_CWIN
if (ply_accurate_loss)
dtz_to_opp[WDL_CWIN][DTZ_BASE_LOSS - loss_num] = opp_base_cwin;
dtz_to_opp[WDL_CWIN][dtz_capt_closs] = opp_base_cwin;
for (i = 0; i <= max_dtz_cursed; i++)
dtz_to_opp[WDL_CWIN][dtz_base_closs - i] = opp_base_cwin + i;
// WDL_CAPT_CWIN
dtz_to_opp[WDL_CAPT_CWIN][DTZ_ILLEGAL] = opp_capt_cwin;
if (ply_accurate_loss)
for (i = DTZ_CAPT_WIN; i <= DTZ_BASE_LOSS - loss_num; i++)
dtz_to_opp[WDL_CAPT_CWIN][i] = opp_capt_cwin;
else
for (i = DTZ_CAPT_WIN; i <= dtz_capt_closs; i++)
dtz_to_opp[WDL_CAPT_CWIN][i] = opp_capt_cwin;
// WDL_LOSS
if (ply_accurate_win) {
dtz_to_opp[WDL_LOSS][DTZ_CAPT_WIN] = DTZ_BASE_LOSS - 2;
for (i = 0; i < win_num - 1; i++)
dtz_to_opp[WDL_LOSS][DTZ_BASE_WIN + i + 1] = DTZ_BASE_LOSS - i - 2;
} else {
dtz_to_opp[WDL_LOSS][DTZ_CAPT_WIN] = DTZ_BASE_LOSS - 1;
for (i = 0; i < win_num; i++)
dtz_to_opp[WDL_LOSS][DTZ_BASE_WIN + i + 1] = DTZ_BASE_LOSS - i - 1;
}
// WDL_CAPT_LOSS
dtz_to_opp[WDL_CAPT_LOSS][DTZ_ILLEGAL] = DTZ_CAPT_LOSS;
if (ply_accurate_win) {
dtz_to_opp[WDL_CAPT_LOSS][DTZ_CAPT_WIN] = DTZ_BASE_LOSS - 2;
for (i = 0; i < win_num - 1; i++)
dtz_to_opp[WDL_CAPT_LOSS][DTZ_BASE_WIN + i + 1] = DTZ_BASE_LOSS - i - 2;
} else {
dtz_to_opp[WDL_CAPT_LOSS][DTZ_CAPT_WIN] = DTZ_BASE_LOSS - 1;
for (i = 0; i < win_num; i++)
dtz_to_opp[WDL_CAPT_LOSS][DTZ_BASE_WIN + i + 1] = DTZ_BASE_LOSS - i - 1;
}
// WDL_CLOSS
if (ply_accurate_win)
dtz_to_opp[WDL_CLOSS][DTZ_BASE_WIN + win_num] = opp_base_closs;
dtz_to_opp[WDL_CLOSS][dtz_capt_cwin] = opp_base_closs;
for (i = 0; i <= max_dtz_cursed; i++)
dtz_to_opp[WDL_CLOSS][dtz_base_cwin + i] = opp_base_closs - i;
// WDL_CAPT_CLOSS
dtz_to_opp[WDL_CAPT_CLOSS][DTZ_ILLEGAL] = opp_capt_closs;
for (i = DTZ_CAPT_WIN; i < dtz_capt_cwin; i++)
dtz_to_opp[WDL_CAPT_CLOSS][i] = opp_capt_closs;
dtz_to_opp[WDL_CAPT_CLOSS][dtz_capt_cwin] = opp_base_closs;
for (i = 0; i <= max_dtz_cursed; i++)
dtz_to_opp[WDL_CAPT_CLOSS][dtz_base_cwin + i] = opp_base_closs - i;
for (i = 0; i < 256; i++)
for (j = 0; j < 256; j++)
dtz_matrix[i][j] = 0;
// DRAW
dtz_matrix[dtz_draw][DTZ_ILLEGAL] = 1;
dtz_matrix[dtz_draw][opp_draw] = 1;
dtz_matrix[dtz_draw][opp_capt_draw] = 1;
// CAPT_DRAW
dtz_matrix[dtz_capt_draw][DTZ_ILLEGAL] = 1;
for (i = DTZ_CAPT_WIN; i <= opp_capt_draw; i++)
dtz_matrix[dtz_capt_draw][i] = 1;
// MATE
dtz_matrix[DTZ_MATE][DTZ_ILLEGAL] = 1;
// CAPT_WIN
dtz_matrix[DTZ_CAPT_WIN][DTZ_ILLEGAL] = 1;
for (i = DTZ_CAPT_WIN; i <= DTZ_MATE; i++)
dtz_matrix[DTZ_CAPT_WIN][i] = 1;
// BASE_WIN
dtz_matrix[DTZ_BASE_WIN + 1][DTZ_MATE] = 1;
if (ply_accurate_win) {
dtz_matrix[DTZ_BASE_WIN + 2][DTZ_CAPT_LOSS] = 1;
for (i = 1; i < win_num; i++)
dtz_matrix[DTZ_BASE_WIN + i + 1][DTZ_BASE_LOSS - i] = 1;
} else {
dtz_matrix[DTZ_BASE_WIN + 1][DTZ_CAPT_LOSS] = 1;
for (i = 1; i < win_num; i++) {
dtz_matrix[DTZ_BASE_WIN + i + 1][DTZ_BASE_LOSS - i] = 1;
}
}
// CAPT_LOSS
dtz_matrix[DTZ_CAPT_LOSS][DTZ_ILLEGAL] = 1;
if (!ply_accurate_loss) {
dtz_matrix[DTZ_CAPT_LOSS][DTZ_CAPT_WIN] = 1;
dtz_matrix[DTZ_CAPT_LOSS][DTZ_BASE_WIN] = 1;
}
// BASE_LOSS
if (ply_accurate_loss) {
dtz_matrix[DTZ_BASE_LOSS - 2][DTZ_BASE_WIN] = 1;
dtz_matrix[DTZ_BASE_LOSS - 2][DTZ_CAPT_WIN] = 1;
for (i = 1; i < loss_num; i++)
dtz_matrix[DTZ_BASE_LOSS - 1 - i][DTZ_BASE_WIN + i] = 1;
} else {
dtz_matrix[DTZ_BASE_LOSS - 1][DTZ_BASE_WIN] = 1;
dtz_matrix[DTZ_BASE_LOSS - 1][DTZ_CAPT_WIN] = 1;
for (i = 1; i < loss_num; i++) {
dtz_matrix[DTZ_BASE_LOSS - 1 - i][DTZ_BASE_WIN + i] = 1;
}
}
if (ply_accurate_win) {
// CAPT_CWIN
dtz_matrix[dtz_capt_cwin][DTZ_ILLEGAL] = 1;
for (i = DTZ_CAPT_WIN; i <= DTZ_BASE_LOSS - win_num; i++)
dtz_matrix[dtz_capt_cwin][i] = 1;
// BASE_CWIN
dtz_matrix[dtz_base_cwin][DTZ_BASE_LOSS - win_num] = 1;
dtz_matrix[dtz_base_cwin][opp_capt_closs] = 1;
dtz_matrix[dtz_base_cwin][opp_base_closs] = 1;
} else {
// CAPT_CWIN
dtz_matrix[dtz_capt_cwin][DTZ_ILLEGAL] = 1;
for (i = DTZ_CAPT_WIN; i <= opp_capt_closs; i++)
dtz_matrix[dtz_capt_cwin][i] = 1;
// BASE_CWIN
dtz_matrix[dtz_base_cwin][opp_capt_closs] = 1;
}
for (i = 1; i <= max_dtz_cursed; i++)
dtz_matrix[dtz_base_cwin + i][opp_base_closs - (i - 1)] = 1;
dtz_matrix[dtz_base_cwin + max_dtz_cursed][opp_base_closs - max_dtz_cursed] = 1;
if (ply_accurate_loss) {
// CAPT_CLOSS
dtz_matrix[dtz_capt_closs][DTZ_ILLEGAL] = 1;
for (i = DTZ_CAPT_WIN; i <= opp_capt_cwin; i++)
dtz_matrix[dtz_capt_closs][i] = 1;
// BASE_CLOSS
dtz_matrix[dtz_base_closs][DTZ_BASE_WIN + loss_num] = 1;
dtz_matrix[dtz_base_closs][opp_capt_cwin] = 1;
dtz_matrix[dtz_base_closs][opp_base_cwin] = 1;
} else {
// CAPT_CLOSS
dtz_matrix[dtz_capt_closs][DTZ_ILLEGAL] = 1;
for (i = DTZ_CAPT_WIN; i <= opp_capt_cwin; i++)
dtz_matrix[dtz_capt_closs][i] = 1;
// BASE_CLOSS
dtz_matrix[dtz_base_closs][opp_capt_cwin] = 1;
}
for (i = 1; i <= max_dtz_cursed; i++)
dtz_matrix[dtz_base_closs - i][opp_base_cwin + (i - 1)] = 1;
dtz_matrix[dtz_base_closs - max_dtz_cursed][opp_base_cwin + max_dtz_cursed] = 1;
}
static void init_wdl(void)
{
int i, j;
for (i = 0; i < 14; i++)
w_skip[i] = 0;
w_skip[W_ILLEGAL] = 1;
w_skip[W_BROKEN] = 1;
for (i = 0; i < 16; i++)
for (j = 0; j < 16; j++)
w_matrix[i][j] = 0;
w_matrix[W_CAPT_WIN][W_ILLEGAL] = 1;
for (i = W_CAPT_WIN; i <= W_MATE; i++)
w_matrix[W_CAPT_WIN][i] = 1;
w_matrix[W_WIN][W_MATE] = 1;
w_matrix[W_WIN][W_LOSS] = 1;
w_matrix[W_WIN][W_CAPT_LOSS] = 1;
w_matrix[W_CAPT_CWIN][W_ILLEGAL] = 1;
for (i = W_CAPT_WIN; i < W_LOSS; i++)
w_matrix[W_CAPT_CWIN][i] = 1;
w_matrix[W_CWIN][W_CLOSS] = 1;
w_matrix[W_CWIN][W_CAPT_LOSS] = 1;
if (ply_accurate_win)
w_matrix[W_CWIN][W_LOSS] = 1;
w_matrix[W_DRAW][W_ILLEGAL] = 1;
w_matrix[W_DRAW][W_DRAW] = 1;
w_matrix[W_DRAW][W_CAPT_DRAW] = 1;
w_matrix[W_CAPT_DRAW][W_ILLEGAL] = 1;
for (i = W_CAPT_WIN; i <= W_CAPT_DRAW; i++)
w_matrix[W_CAPT_DRAW][i] = 1;
w_matrix[W_CLOSS][W_CWIN] = 1;
w_matrix[W_CLOSS][W_CAPT_CWIN] = 1;
if (ply_accurate_loss)
w_matrix[W_CLOSS][W_WIN] = 1;
w_matrix[W_CAPT_CLOSS][W_ILLEGAL] = 1;
for (i = W_CAPT_WIN; i < W_DRAW; i++)
w_matrix[W_CAPT_CLOSS][i] = 1;
w_matrix[W_LOSS][W_CAPT_WIN] = 1;
w_matrix[W_LOSS][W_WIN] = 1;
w_matrix[W_CAPT_LOSS][W_ILLEGAL] = 1;
w_matrix[W_CAPT_LOSS][W_CAPT_WIN] = 1;
w_matrix[W_CAPT_LOSS][W_WIN] = 1;
w_matrix[W_MATE][W_ILLEGAL] = 1;
}
static int is_attacked(int sq, int *pcs, bitboard occ, int *p)
{
int k;
do {
k = *pcs;
bitboard bb = PieceRange(p[k], pt[k], occ);
if (bb & bit[sq]) return 1;
} while (*(++pcs) >= 0);
return 0;
}
static int check_mate(int *pcs, long64 idx0, ubyte *table, bitboard occ, int *p)
{
int sq;
long64 idx, idx2;
bitboard bb;
int k = *pcs++;
if (k == 0) { // white king
bb = WhiteKingMoves;
while (bb) {
sq = FirstOne(bb);
idx2 = MakeMove0(idx0, sq);
if (table[idx2] < WDL_ILLEGAL) return 0;
ClearFirst(bb);
}
} else { // otherwise k == 1, i.e. black king
bb = BlackKingMoves;
while (bb) {
sq = FirstOne(bb);
idx2 = MakeMove1(idx0, sq);
if (table[idx2] < WDL_ILLEGAL) return 0;
ClearFirst(bb);
}
}
while ((k = *pcs++) >= 0) {
bb = PieceMoves2(p[k], pt[k], occ);
idx = idx0 & ~mask[k];
while (bb) {
sq = FirstOne(bb);
idx2 = MakeMove2(idx, k, sq);
if (table[idx2] < WDL_ILLEGAL) return 0;
ClearFirst(bb);
}
}
return 1;
}
void calc_broken(struct thread_data *thread)
{
long64 idx, idx2;
int i;
int n = numpcs;
assume(n >= 3 && n <= 6);
bitboard occ, bb;
long64 end = thread->end;
for (idx = thread->begin; idx < end; idx += 64) {
FILL_OCC64_cheap {
for (i = 0, bb = 1; i < 64; i++, bb <<= 1)
table_w[idx + i] = table_b[idx + i] = (occ & bb) ? WDL_BROKEN : 0;
} else {
for (i = 0; i < 64; i++)
table_w[idx + i] = table_b[idx + i] = WDL_BROKEN;
}
}
}
void calc_mates(struct thread_data *thread)
{
long64 idx, idx2;
bitboard occ, bb;
int i;
int n = numpcs;
assume(n >= 3 && n <= 6);
int p[MAX_PIECES];
long64 end = thread->end;
for (idx = thread->begin; idx < end; idx += 64) {
FILL_OCC64 {
for (i = 0, bb = 1; i < 64; i++, bb <<= 1) {
if (occ & bb) continue;
int chk_b = (table_w[idx + i] == WDL_ILLEGAL);
int chk_w = (table_b[idx + i] == WDL_ILLEGAL);
if (chk_w == chk_b) continue;
p[n - 1] = i;
if (chk_w) {
if (!table_w[idx + i] && check_mate(white_pcs, idx + i, table_b, occ | bb, p))
table_w[idx + i] = CAPT_MATE;
} else {
if (!table_b[idx + i] && check_mate(black_pcs, idx + i, table_w, occ | bb, p))
table_b[idx + i] = CAPT_MATE;
}
}
}
}
}
MARK(mark_illegal)
{
MARK_BEGIN;
table[idx2] = WDL_ILLEGAL;
MARK_END;
}
MARK_PIVOT0(mark_capt_wins)
{
MARK_BEGIN_PIVOT0;
if (table[idx2] < WDL_ILLEGAL) {
table[idx2] = CAPT_WIN;
if (PIVOT_ON_DIAG(idx2)) {
long64 idx3 = PIVOT_MIRROR(idx2);
table[idx3] = CAPT_WIN;
}
}
MARK_END;
}
MARK_PIVOT1(mark_capt_wins)
{
MARK_BEGIN_PIVOT1;
if (table[idx2] < WDL_ILLEGAL) {
table[idx2] = CAPT_WIN;
if (PIVOT_ON_DIAG(idx2)) {
long64 idx3 = PIVOT_MIRROR(idx2);
table[idx3] = CAPT_WIN;
}
}
MARK_END;
}
MARK(mark_capt_wins)
{
MARK_BEGIN;
if (table[idx2] < WDL_ILLEGAL)
table[idx2] = CAPT_WIN;
MARK_END;
}
MARK_PIVOT0(mark_capt_value, ubyte v)
{
MARK_BEGIN_PIVOT0;
SET_CAPT_VALUE(table[idx2], v);
if (PIVOT_ON_DIAG(idx2)) {
long64 idx3 = PIVOT_MIRROR(idx2);
SET_CAPT_VALUE(table[idx3], v);
}
MARK_END;
}
MARK_PIVOT1(mark_capt_value, ubyte v)
{
MARK_BEGIN_PIVOT1;
SET_CAPT_VALUE(table[idx2], v);
if (PIVOT_ON_DIAG(idx2)) {
long64 idx3 = PIVOT_MIRROR(idx2);
SET_CAPT_VALUE(table[idx3], v);
}
MARK_END;
}
MARK(mark_capt_value, ubyte v)
{
MARK_BEGIN;
SET_CAPT_VALUE(table[idx2], v);
MARK_END;
}
MARK_PIVOT0(mark_capt_losses)
{
MARK_BEGIN_PIVOT0;
SET_CAPT_LOSS(table[idx2]);
if (PIVOT_ON_DIAG(idx2)) {
long64 idx3 = PIVOT_MIRROR(idx2);
SET_CAPT_LOSS(table[idx3]);
}
MARK_END;
}
MARK_PIVOT1(mark_capt_losses)
{
MARK_BEGIN_PIVOT1;
SET_CAPT_LOSS(table[idx2]);
if (PIVOT_ON_DIAG(idx2)) {
long64 idx3 = PIVOT_MIRROR(idx2);
SET_CAPT_LOSS(table[idx3]);
}
MARK_END;
}
MARK(mark_capt_losses)
{
MARK_BEGIN;
SET_CAPT_LOSS(table[idx2]);
MARK_END;
}
static int captured_piece;
void calc_illegal_w(struct thread_data *thread)
{
BEGIN_CAPTS_PIVOT_NOPROBE;
LOOP_CAPTS_PIVOT1 {
FILL_OCC_CAPTS_PIVOT1 {
MAKE_IDX2_PIVOT1;
LOOP_WHITE_PIECES_PIVOT1(mark_illegal);
}
}
}
void calc_illegal_b(struct thread_data *thread)
{
BEGIN_CAPTS_PIVOT_NOPROBE;
LOOP_CAPTS_PIVOT0 {
FILL_OCC_CAPTS_PIVOT0 {
MAKE_IDX2_PIVOT0;
LOOP_BLACK_PIECES_PIVOT0(mark_illegal);
}
}
}
void probe_captures_w(struct thread_data *thread)
{
BEGIN_CAPTS;
LOOP_CAPTS {
FILL_OCC_CAPTS {
if (is_attacked(p[white_king], pcs2, occ, p)) continue;
int v = probe_tb(pt2, p, 0, occ, -2, 2);
MAKE_IDX2;
switch (v) {
case -2:
LOOP_WHITE_PIECES(mark_capt_wins);
break;
case -1:
LOOP_WHITE_PIECES(mark_capt_value, CAPT_CWIN);
break;
case 0:
LOOP_WHITE_PIECES(mark_capt_value, CAPT_DRAW);
break;
case 1:
LOOP_WHITE_PIECES(mark_capt_value, CAPT_CLOSS);
break;
case 2:
LOOP_WHITE_PIECES(mark_capt_losses);
break;
default:
assume(0);
break;
}
}
}
}
void probe_captures_b(struct thread_data *thread)
{
BEGIN_CAPTS;
LOOP_CAPTS {
FILL_OCC_CAPTS {
if (is_attacked(p[black_king], pcs2, occ, p)) continue;
int v = probe_tb(pt2, p, 1, occ, -2, 2);
MAKE_IDX2;
switch (v) {
case -2:
LOOP_BLACK_PIECES(mark_capt_wins);
break;
case -1:
LOOP_BLACK_PIECES(mark_capt_value, CAPT_CWIN);
break;
case 0:
LOOP_BLACK_PIECES(mark_capt_value, CAPT_DRAW);
break;
case 1:
LOOP_BLACK_PIECES(mark_capt_value, CAPT_CLOSS);
break;
case 2:
LOOP_BLACK_PIECES(mark_capt_losses);
break;
default:
assume(0);
break;
}
}
}
}
void calc_captures_w(void)
{
int i, j, k;
int n = numpcs;
captured_piece = black_king;
run_threaded(calc_illegal_w, work_piv1, 1);
for (i = 2; i < n; i++) { // loop over black pieces
if (!(pt[i] & 0x08)) continue;
for (k = 0, j = 0; black_pcs[k] >= 0; k++)
if (black_pcs[k] != i)
pcs2[j++] = black_pcs[k];
pcs2[j] = -1;
captured_piece = i;
run_threaded(probe_captures_w, work_g, 1);
}
}
void calc_captures_b(void)
{
int i, j, k;
int n = numpcs;
run_threaded(calc_illegal_b, work_piv0, 1);
for (i = 2; i < n; i++) { // loop over white pieces
if (pt[i] & 0x08) continue;
for (k = 0, j = 0; white_pcs[k] >= 0; k++)
if (white_pcs[k] != i)
pcs2[j++] = white_pcs[k];
pcs2[j] = -1;
captured_piece = i;
run_threaded(probe_captures_b, work_g, 1);
}
}
// TODO: remove the if > 4
#if 1
void load_wdl(struct thread_data *thread)
{
long64 idx, idx2, idx_p, idx2_p;
int i, v1, v2, v1_p;
int n = numpcs;
assume(n >= 3 && n <= 6);
ubyte *table = load_table;
ubyte *src = tb_table;
int *perm = tb_perm;
long64 end = thread->end;
int pos[MAX_PIECES];
ubyte *norm = load_entry->norm[load_bside];
int *factor = load_entry->factor[load_bside];
struct TBEntry_piece *entry = load_entry;
for (idx = thread->begin; idx < end; idx++) {
v1_p = table[idx];
if (v1_p < WDL_ILLEGAL) break;
}
if (idx == end) return;
for (i = n - 1, idx2 = idx; i > 1; i--, idx2 >>= 6)
pos[perm[i]] = idx2 & 0x3f;
pos[perm[0]] = KK_inv[idx2][0];
pos[perm[1]] = KK_inv[idx2][1];
idx2_p = encode_piece(entry, norm, pos, factor);
__builtin_prefetch(&src[idx2_p], 0, 3);
idx_p = idx;
for (idx++; idx < end; idx++) {
v1 = table[idx];
if (v1 >= WDL_ILLEGAL) continue;
for (i = n - 1, idx2 = idx; i > 1; i--, idx2 >>= 6)
pos[perm[i]] = idx2 & 0x3f;
pos[perm[0]] = KK_inv[idx2][0];
pos[perm[1]] = KK_inv[idx2][1];
idx2 = encode_piece(entry, norm, pos, factor);
__builtin_prefetch(&src[idx2], 0, 3);
v2 = src[idx2_p];
if (unlikely(v2 > 4)) table[idx_p] = WDL_ERROR;
else table[idx_p] = wdl_matrix[v2][v1_p];
if(unlikely(table[idx_p]==WDL_ERROR))
error("WDL_ERROR: idx = %"PRIu64", v2 = %d, v1 = %d\n", idx_p, v2, v1_p);
v1_p = v1;
idx_p = idx;
idx2_p = idx2;
}
v2 = src[idx2_p];
if (unlikely(v2 > 4)) table[idx_p] = WDL_ERROR;
else table[idx_p] = wdl_matrix[v2][v1_p];
if(unlikely(table[idx_p]==WDL_ERROR))
error("WDL_ERROR: idx = %"PRIu64", v2 = %d, v1 = %d\n", idx_p, v2, v1_p);
}
#else
void load_wdl(struct thread_data *thread)
{
long64 idx, idx2;
int i, v1, v2;
int n = numpcs;
assume(n >= 3 && n <= 6);
ubyte *table = load_table;
ubyte *src = tb_table;
int *perm = tb_perm;
long64 end = thread->end;
int pos[MAX_PIECES];
ubyte *norm = load_entry->norm[load_bside];
int *factor = load_entry->factor[load_bside];
struct TBEntry_piece *entry = load_entry;
for (idx = thread->begin; idx < end; idx++) {
v1 = table[idx];
if (v1 >= WDL_ILLEGAL) continue;
for (i = n - 1, idx2 = idx; i > 1; i--, idx2 >>= 6)
pos[perm[i]] = idx2 & 0x3f;
pos[perm[0]] = KK_inv[idx2][0];
pos[perm[1]] = KK_inv[idx2][1];
idx2 = encode_piece(entry, norm, pos, factor);
v2 = src[idx2];
if (unlikely(v2 > 4)) table[idx] = WDL_ERROR;
else table[idx] = wdl_matrix[v2][v1];
if(unlikely(table[idx]==WDL_ERROR))
printf("WDL_ERROR: idx = %"PRIu64", v2 = %d, v1 = %d\n", idx, v2, v1);
}
}
#endif
void load_dtz(struct thread_data *thread)
{
long64 idx, idx2, idx_p, idx2_p;
int i, v1, v2, v1_p;
int n = numpcs;
assume(n >= 3 && n <= 6);
ubyte *table = load_table;
ubyte *src = tb_table;
int *perm = tb_perm;
long64 end = thread->end;
int pos[MAX_PIECES];
ubyte *norm = load_entry->norm[load_bside];
int *factor = load_entry->factor[load_bside];
struct TBEntry_piece *entry = load_entry;
for (idx = thread->begin; idx < end; idx++) {
v1_p = table[idx];
if (v1_p < WDL_ERROR)
break;
table[idx] = wdl_to_dtz_c[v1_p - WDL_ERROR];
}
if (idx == end) return;
for (i = n - 1, idx2 = idx; i > 1; i--, idx2 >>= 6)
pos[perm[i]] = idx2 & 0x3f;
pos[perm[0]] = KK_inv[idx2][0];
pos[perm[1]] = KK_inv[idx2][1];
idx2_p = encode_piece(entry, norm, pos, factor);
__builtin_prefetch(&src[idx2_p], 0, 3);
idx_p = idx;
for (idx++; idx < end; idx++) {
v1 = table[idx];
if (v1 >= WDL_ERROR) {
table[idx] = wdl_to_dtz_c[v1 - WDL_ERROR];
continue;
}
for (i = n - 1, idx2 = idx; i > 1; i--, idx2 >>= 6)
pos[perm[i]] = idx2 & 0x3f;
pos[perm[0]] = KK_inv[idx2][0];
pos[perm[1]] = KK_inv[idx2][1];
idx2 = encode_piece(entry, norm, pos, factor);
__builtin_prefetch(&src[idx2], 0, 3);
v2 = src[idx2_p];
table[idx_p] = wdl_to_dtz[v1_p][v2];
if(unlikely(table[idx_p]==DTZ_ERROR))
error("DTZ_ERROR: idx = %"PRIu64", v1 = %d, v2 = %d, idx2 = %"PRIu64"\n", idx_p, v1_p, v2, idx2_p);
v1_p = v1;
idx_p = idx;
idx2_p = idx2;
}
v2 = src[idx2_p];
table[idx_p] = wdl_to_dtz[v1_p][v2];
if(table[idx_p]==DTZ_ERROR)
error("DTZ_ERROR: idx = %"PRIu64", v1 = %d, v2 = %d, idx2 = %"PRIu64"\n", idx_p, v1_p, v2, idx2_p);
}
void load_dtz_mapped(struct thread_data *thread)
{
long64 idx, idx2;
int i, v1, v2;
int n = numpcs;
assume(n >= 3 && n <= 6);
ubyte *table = load_table;
ubyte *src = tb_table;
int *perm = tb_perm;
long64 end = thread->end;
int pos[MAX_PIECES];
ubyte *norm = load_entry->norm[load_bside];
int *factor = load_entry->factor[load_bside];
struct TBEntry_piece *entry = load_entry;
ubyte (*map)[256] = load_map;
for (idx = thread->begin; idx < end; idx++) {
v1 = table[idx];
if (v1 >= WDL_ERROR) {
table[idx] = wdl_to_dtz_c[v1 - WDL_ERROR];
continue;
}
int wdl = wdl_tbl_to_wdl[v1];
for (i = n - 1, idx2 = idx; i > 1; i--, idx2 >>= 6)
pos[perm[i]] = idx2 & 0x3f;
pos[perm[0]] = KK_inv[idx2][0];
pos[perm[1]] = KK_inv[idx2][1];
idx2 = encode_piece(entry, norm, pos, factor);
v2 = map[wdl][src[idx2]];
table[idx] = wdl_to_dtz[v1][v2];
if(unlikely(table[idx]==DTZ_ERROR))
error("DTZ_ERROR: idx = %"PRIu64", wdl = %d, v1 = %d, v2 = %d, idx2 = %"PRIu64"\n", idx, wdl, v1, v2, idx2);
}
}
static int compute(int *pcs, long64 idx0, ubyte *table, bitboard occ, int *p)
{
int sq;
long64 idx, idx2;
bitboard bb;
int best = DTZ_ILLEGAL;
int k = *pcs++;
if (k == 0) { // white king
bb = WhiteKingMoves;
while (bb) {
sq = FirstOne(bb);
idx2 = MakeMove0(idx0, sq);
int v = table[idx2];
if (v > best) best = v;
ClearFirst(bb);
}
} else { // otherwise k == 1, i.e. black king
bb = BlackKingMoves;
while (bb) {
sq = FirstOne(bb);
idx2 = MakeMove1(idx0, sq);
int v = table[idx2];
if (v > best) best = v;
ClearFirst(bb);
}
}
while ((k = *pcs++) >= 0) {
bb = PieceMoves2(p[k], pt[k], occ);
idx = idx0 & ~mask[k];
while (bb) {
sq = FirstOne(bb);
idx2 = MakeMove2(idx, k, sq);
int v = table[idx2];
if (v > best) best = v;
ClearFirst(bb);
}
}