#include <stdlib.h>
#include <limits.h>
+#include <assert.h>
#include "shogi.h"
-int
+int CONV
swap( const tree_t * restrict ptree, unsigned int move, int root_alpha,
int root_beta, int turn )
{
bitboard_t bb, bb_temp, bb_attack;
- unsigned int uattack;
- int attacked_piece, from, to, nc, ir0;
+ int attacked_piece, from, to, nc;
int piece_cap, piece, value, xvalue, alpha, beta, is_promo;
from = (int)I2From( move );
attacked_piece = p_value_ex[15+piece];
if ( is_promo )
{
- value += benefit2promo[7+piece];
- attacked_piece += benefit2promo[7+piece];
+ value += p_value_pm[7+piece];
+ attacked_piece += p_value_pm[7+piece];
}
xvalue = value - attacked_piece - MT_PRO_PAWN;
if ( xvalue >= root_beta ) { return xvalue; }
beta = value;
for ( nc = 1;; nc++ )
{
- /* remove an attacker, and add a hidden piece to attack bitmap */
+ /* remove an attacker, and add a hidden piece to bb_attack */
if ( from < nsquare )
{
Xor( from, bb_attack );
switch ( adirec[to][from] )
{
case direc_rank:
- ir0 = aslide[from].ir0;
- uattack = AttackRank( from );
- if ( from > to ) { uattack &= abb_plus_rays[from].p[ir0]; }
- else { uattack &= abb_minus_rays[from].p[ir0]; }
- uattack &= BB_B_RD.p[ir0] | BB_W_RD.p[ir0];
- bb_attack.p[ir0] |= uattack;
+ bb = AttackRank( from );
+ if ( from > to ) { BBAnd( bb, bb, abb_plus_rays[from] ); }
+ else { BBAnd( bb, bb, abb_minus_rays[from] ); }
+ BBOr( bb_temp, BB_B_RD, BB_W_RD );
+ BBAndOr( bb_attack, bb, bb_temp );
break;
case direc_file:
case direc_diag1:
bb = AttackDiag1( from );
if ( from > to ) { BBAnd( bb, bb, abb_plus_rays[from] ); }
- else { BBAnd( bb, bb, abb_minus_rays[from] ); }
+ else { BBAnd( bb, bb, abb_minus_rays[from] ); }
BBOr( bb_temp, BB_B_BH, BB_W_BH );
BBAnd( bb, bb, bb_temp );
BBOr( bb_attack, bb_attack, bb );
}
}
- if ( ! BBToU( bb_attack ) ) { break; }
- /* find a cheapest piece attacking the target */
- turn = Flip( turn );
- value = attacked_piece - value;
- if ( turn )
- {
- if( BBContract( bb_attack, BB_WPAWN ) )
- {
- from = to-nfile;
- attacked_piece = MT_CAP_PAWN;
- if ( to > 53 )
- {
- value += MT_PRO_PAWN;
- attacked_piece += MT_PRO_PAWN;
- }
- goto ab_cut;
- }
- BBAnd( bb, BB_WLANCE, bb_attack );
- if( BBToU( bb ) )
- {
- from = FirstOne( bb );
- attacked_piece = MT_CAP_LANCE;
- if ( to > 53 )
- {
- value += MT_PRO_LANCE;
- attacked_piece += MT_PRO_LANCE;
- }
- goto ab_cut;
- }
- BBAnd( bb, BB_WKNIGHT, bb_attack );
- if( BBToU( bb ) )
- {
- from = FirstOne( bb );
- attacked_piece = MT_CAP_KNIGHT;
- if ( to > 53 )
- {
- value += MT_PRO_KNIGHT;
- attacked_piece += MT_PRO_KNIGHT;
- }
- goto ab_cut;
- }
- BBAnd( bb, BB_WPRO_PAWN, bb_attack );
- if( BBToU( bb ) )
- {
- from = FirstOne( bb );
- attacked_piece = MT_CAP_PRO_PAWN;
- goto ab_cut;
- }
- BBAnd( bb, BB_WPRO_LANCE, bb_attack );
- if( BBToU( bb ) )
- {
- from = FirstOne( bb );
- attacked_piece = MT_CAP_PRO_LANCE;
- goto ab_cut;
- }
- BBAnd( bb, BB_WPRO_KNIGHT, bb_attack );
- if( BBToU( bb ) )
- {
- from = FirstOne( bb );
- attacked_piece = MT_CAP_PRO_KNIGHT;
- goto ab_cut;
- }
- BBAnd( bb, BB_WSILVER, bb_attack );
- if( BBToU( bb ) )
- {
- from = FirstOne( bb );
- attacked_piece = MT_CAP_SILVER;
- if ( from > 53 || to > 53 )
- {
- value += MT_PRO_SILVER;
- attacked_piece += MT_PRO_SILVER;
- }
- goto ab_cut;
- }
- BBAnd( bb, BB_WPRO_SILVER, bb_attack );
- if( BBToU( bb ) )
- {
- from = FirstOne( bb );
- attacked_piece = MT_CAP_PRO_SILVER;
- goto ab_cut;
- }
- BBAnd( bb, BB_WGOLD, bb_attack );
- if( BBToU( bb ) )
- {
- from = FirstOne( bb );
- attacked_piece = MT_CAP_GOLD;
- goto ab_cut;
- }
- BBAnd( bb, BB_WBISHOP, bb_attack );
- if( BBToU( bb ) )
- {
- from = FirstOne( bb );
- attacked_piece = MT_CAP_BISHOP;
- if ( from > 53 || to > 53 )
- {
- value += MT_PRO_BISHOP;
- attacked_piece += MT_PRO_BISHOP;
- }
- goto ab_cut;
- }
- BBAnd( bb, BB_WHORSE, bb_attack );
- if( BBToU( bb ) )
- {
- from = FirstOne( bb );
- attacked_piece = MT_CAP_HORSE;
- goto ab_cut;
- }
- BBAnd( bb, BB_WROOK, bb_attack );
- if( BBToU( bb ) )
- {
- from = FirstOne( bb );
- attacked_piece = MT_CAP_ROOK;
- if ( from > 53 || to > 53 )
- {
- value += MT_PRO_ROOK;
- attacked_piece += MT_PRO_ROOK;
- }
- goto ab_cut;
- }
- BBAnd( bb, BB_WDRAGON, bb_attack );
- if( BBToU( bb ) )
- {
- from = FirstOne( bb );
- attacked_piece = MT_CAP_DRAGON;
- goto ab_cut;
- }
- if( BBContract( bb_attack, BB_WKING ) )
- {
- from = SQ_WKING;
- attacked_piece = MT_CAP_KING;
- goto ab_cut;
- }
- }
- else {
+ /* find the cheapest piece attacks the target */
+ if ( turn ) {
+
+ if ( ! BBContract( bb_attack, BB_BOCCUPY ) ) { break; }
+ value = attacked_piece - value;
+
if( BBContract( bb_attack, BB_BPAWN ) )
{
from = to+nfile;
goto ab_cut;
}
BBAnd( bb, BB_BLANCE, bb_attack );
- if( BBToU( bb ) )
+ if( BBTest( bb ) )
{
from = FirstOne( bb );
attacked_piece = MT_CAP_LANCE;
goto ab_cut;
}
BBAnd( bb, BB_BKNIGHT, bb_attack );
- if( BBToU( bb ) )
+ if( BBTest( bb ) )
{
from = FirstOne( bb );
attacked_piece = MT_CAP_KNIGHT;
goto ab_cut;
}
BBAnd( bb, BB_BPRO_PAWN, bb_attack );
- if( BBToU( bb ) )
+ if( BBTest( bb ) )
{
from = FirstOne( bb );
attacked_piece = MT_CAP_PRO_PAWN;
goto ab_cut;
}
BBAnd( bb, BB_BPRO_LANCE, bb_attack );
- if( BBToU( bb ) )
+ if( BBTest( bb ) )
{
from = FirstOne( bb );
attacked_piece = MT_CAP_PRO_LANCE;
goto ab_cut;
}
BBAnd( bb, BB_BPRO_KNIGHT, bb_attack );
- if( BBToU( bb ) )
+ if( BBTest( bb ) )
{
from = FirstOne( bb );
attacked_piece = MT_CAP_PRO_KNIGHT;
goto ab_cut;
}
BBAnd( bb, BB_BSILVER, bb_attack );
- if( BBToU( bb ) )
+ if( BBTest( bb ) )
{
from = FirstOne( bb );
attacked_piece = MT_CAP_SILVER;
goto ab_cut;
}
BBAnd( bb, BB_BPRO_SILVER, bb_attack );
- if( BBToU( bb ) )
+ if( BBTest( bb ) )
{
from = FirstOne( bb );
attacked_piece = MT_CAP_PRO_SILVER;
goto ab_cut;
}
BBAnd( bb, BB_BGOLD, bb_attack );
- if( BBToU( bb ) )
+ if( BBTest( bb ) )
{
from = FirstOne( bb );
attacked_piece = MT_CAP_GOLD;
goto ab_cut;
}
BBAnd( bb, BB_BBISHOP, bb_attack );
- if( BBToU( bb ) )
+ if( BBTest( bb ) )
{
from = FirstOne( bb );
attacked_piece = MT_CAP_BISHOP;
goto ab_cut;
}
BBAnd( bb, BB_BHORSE, bb_attack );
- if( BBToU( bb ) )
+ if( BBTest( bb ) )
{
from = FirstOne( bb );
attacked_piece = MT_CAP_HORSE;
goto ab_cut;
}
BBAnd( bb, BB_BROOK, bb_attack );
- if( BBToU( bb ) )
+ if( BBTest( bb ) )
{
from = FirstOne( bb );
attacked_piece = MT_CAP_ROOK;
goto ab_cut;
}
BBAnd( bb, BB_BDRAGON, bb_attack );
- if( BBToU( bb ) )
+ if( BBTest( bb ) )
{
from = FirstOne( bb );
attacked_piece = MT_CAP_DRAGON;
goto ab_cut;
}
- if( BBContract( bb_attack, BB_BKING ) )
+
+ assert( BBContract( bb_attack, BB_BKING ) );
+
+ from = SQ_BKING;
+ attacked_piece = MT_CAP_KING;
+
+ } else {
+
+ if ( ! BBContract( bb_attack, BB_WOCCUPY ) ) { break; }
+
+ value = attacked_piece - value;
+
+ if( BBContract( bb_attack, BB_WPAWN ) )
+ {
+ from = to-nfile;
+ attacked_piece = MT_CAP_PAWN;
+ if ( to > 53 )
+ {
+ value += MT_PRO_PAWN;
+ attacked_piece += MT_PRO_PAWN;
+ }
+ goto ab_cut;
+ }
+ BBAnd( bb, BB_WLANCE, bb_attack );
+ if( BBTest( bb ) )
{
- from = SQ_BKING;
- attacked_piece = MT_CAP_KING;
+ from = FirstOne( bb );
+ attacked_piece = MT_CAP_LANCE;
+ if ( to > 53 )
+ {
+ value += MT_PRO_LANCE;
+ attacked_piece += MT_PRO_LANCE;
+ }
goto ab_cut;
}
+ BBAnd( bb, BB_WKNIGHT, bb_attack );
+ if( BBTest( bb ) )
+ {
+ from = FirstOne( bb );
+ attacked_piece = MT_CAP_KNIGHT;
+ if ( to > 53 )
+ {
+ value += MT_PRO_KNIGHT;
+ attacked_piece += MT_PRO_KNIGHT;
+ }
+ goto ab_cut;
+ }
+ BBAnd( bb, BB_WPRO_PAWN, bb_attack );
+ if( BBTest( bb ) )
+ {
+ from = FirstOne( bb );
+ attacked_piece = MT_CAP_PRO_PAWN;
+ goto ab_cut;
+ }
+ BBAnd( bb, BB_WPRO_LANCE, bb_attack );
+ if( BBTest( bb ) )
+ {
+ from = FirstOne( bb );
+ attacked_piece = MT_CAP_PRO_LANCE;
+ goto ab_cut;
+ }
+ BBAnd( bb, BB_WPRO_KNIGHT, bb_attack );
+ if( BBTest( bb ) )
+ {
+ from = FirstOne( bb );
+ attacked_piece = MT_CAP_PRO_KNIGHT;
+ goto ab_cut;
+ }
+ BBAnd( bb, BB_WSILVER, bb_attack );
+ if( BBTest( bb ) )
+ {
+ from = FirstOne( bb );
+ attacked_piece = MT_CAP_SILVER;
+ if ( from > 53 || to > 53 )
+ {
+ value += MT_PRO_SILVER;
+ attacked_piece += MT_PRO_SILVER;
+ }
+ goto ab_cut;
+ }
+ BBAnd( bb, BB_WPRO_SILVER, bb_attack );
+ if( BBTest( bb ) )
+ {
+ from = FirstOne( bb );
+ attacked_piece = MT_CAP_PRO_SILVER;
+ goto ab_cut;
+ }
+ BBAnd( bb, BB_WGOLD, bb_attack );
+ if( BBTest( bb ) )
+ {
+ from = FirstOne( bb );
+ attacked_piece = MT_CAP_GOLD;
+ goto ab_cut;
+ }
+ BBAnd( bb, BB_WBISHOP, bb_attack );
+ if( BBTest( bb ) )
+ {
+ from = FirstOne( bb );
+ attacked_piece = MT_CAP_BISHOP;
+ if ( from > 53 || to > 53 )
+ {
+ value += MT_PRO_BISHOP;
+ attacked_piece += MT_PRO_BISHOP;
+ }
+ goto ab_cut;
+ }
+ BBAnd( bb, BB_WHORSE, bb_attack );
+ if( BBTest( bb ) )
+ {
+ from = FirstOne( bb );
+ attacked_piece = MT_CAP_HORSE;
+ goto ab_cut;
+ }
+ BBAnd( bb, BB_WROOK, bb_attack );
+ if( BBTest( bb ) )
+ {
+ from = FirstOne( bb );
+ attacked_piece = MT_CAP_ROOK;
+ if ( from > 53 || to > 53 )
+ {
+ value += MT_PRO_ROOK;
+ attacked_piece += MT_PRO_ROOK;
+ }
+ goto ab_cut;
+ }
+ BBAnd( bb, BB_WDRAGON, bb_attack );
+ if( BBTest( bb ) )
+ {
+ from = FirstOne( bb );
+ attacked_piece = MT_CAP_DRAGON;
+ goto ab_cut;
+ }
+
+ assert( BBContract( bb_attack, BB_WKING ) );
+ from = SQ_WKING;
+ attacked_piece = MT_CAP_KING;
}
- break;
ab_cut:
+ turn = Flip( turn );
if ( nc & 1 )
{
if ( -value > alpha )
}
}
}
-
+
if ( nc & 1 ) { return beta; }
else { return alpha; }
}
projects / bonanza.git / blobdiff