Move MoveGen::next()
{
Move res;
loop:
switch( *phPtr )
{
case mpHash:
res = killer->hashMove;
phPtr++;
if ( !res || !(board.inCheck() ? board.isLegal<1,0>( res, pins() ) : board.isLegal<0,0>( res, pins() ) ) )
goto loop;
genMoves[ genMoveCount++ ] = res;
break;
case mpKiller1:
res = killer->killers[0];
phPtr++;
if ( !res || alreadyGenerated(res) ||
!(board.inCheck() ? board.isLegal<1,1>( res, pins() ) : board.isLegal<0,1>( res, pins() ) ) )
goto loop;
genMoves[ genMoveCount++ ] = res;
break;
case mpKiller2:
res = killer->killers[1];
phPtr++;
if ( !res || alreadyGenerated(res) ||
!(board.inCheck() ? board.isLegal<1,1>( res, pins() ) : board.isLegal<0,1>( res, pins() ) ) )
goto loop;
genMoves[ genMoveCount++ ] = res;
break;
case mpCapNoSort:
count = generateCaptures( board, moveBuf );
index = 0;
phPtr++;
goto loop;
break;
case mpCap:
count = generateCaptures( board, moveBuf );
index = badCapCount = 0;
scoreCaptures();
phPtr++;
goto loop;
break;
case mpBadCap:
index = 0;
phPtr++;
goto loop;
break;
case mpQCap:
count = generateCaptures( board, moveBuf, 0 );
index = 0;
scoreCaptures();
phPtr++;
goto loop;
break;
case mpQChecks:
count = board.turn() == ctWhite ?
generateChecks< ctWhite >( moveBuf ) : generateChecks< ctBlack >( moveBuf );
scoreChecks();
index = 0;
phPtr++;
goto loop;
break;
case mpCastling:
assert( board.canCastle() );
index = 0;
count = board.turn() == ctWhite ?
generateCastling< ctWhite >( board, moveBuf )
: generateCastling< ctBlack >( board, moveBuf );
phPtr++;
goto loop;
break;
case mpQuietNoSort:
count = generateQuiet( board, moveBuf );
index = 0;
phPtr++;
goto loop;
break;
case mpQuiet:
count = generateQuiet( board, moveBuf );
scoreQuiet();
index = 0;
phPtr++;
goto loop;
break;
case mpEvasNoSort:
count = generateEvasions( board, moveBuf );
index = 0;
phPtr++;
goto loop;
break;
case mpEvas:
count = generateEvasions( board, moveBuf );
scoreEvasions();
index = 0;
phPtr++;
goto loop;
break;
case mpCapBuffer:
// here we'll ocassionally move to badcaps so it's different
do
{
loopcap:
if ( index >= count )
{
phPtr++;
goto loop;
}
res = moveBuf[ index++ ];
if ( alreadyGenerated(res) )
goto loopcap;
// do fast(sign) see
if ( board.see<1>(res) < 0 )
{
// bad capture detected
assert( badCapCount < maxCaptures );
badCaps[ badCapCount++ ] = res;
goto loopcap;
}
} while( !board.pseudoIsLegal<0>( res, pin ) );
break;
case mpQCapBuffer:
// here we'll ocassionally move to badcaps so it's different
do
{
qloopcap:
if ( index >= count )
{
phPtr++;
goto loop;
}
res = moveBuf[ index++ ];
if ( alreadyGenerated(res) )
goto qloopcap;
// do fast(sign) see
if ( board.see<1>( res ) < 0 )
// bad capture detected
goto qloopcap;
} while( !board.pseudoIsLegal<0>( res, pin ) );
break;
case mpCastlingBuffer:
if ( index >= count )
{
phPtr++;
goto loop;
}
res = moveBuf[ index++ ];
if ( alreadyGenerated(res) )
goto loop;
break;
case mpCastlingBufferLegal:
if ( index >= count )
{
phPtr++;
goto loop;
}
res = moveBuf[ index++ ];
break;
case mpEvasBuffer:
do
{
if ( index >= count )
{
phPtr++;
goto loop;
}
res = moveBuf[ index++ ];
} while ( alreadyGenerated(res) || !board.pseudoIsLegal<1>( res, pin ) );
break;
case mpEvasBufferLegal:
do
{
if ( index >= count )
{
phPtr++;
goto loop;
}
res = moveBuf[ index++ ];
} while ( !board.pseudoIsLegal<1>( res, pin ) );
break;
case mpBufferLegal:
do
{
if ( index >= count )
{
phPtr++;
goto loop;
}
res = moveBuf[ index++ ];
} while ( !board.pseudoIsLegal<0>( res, pin ) );
break;
case mpQuietBuffer:
do
{
if ( index >= count )
{
phPtr++;
goto loop;
}
res = moveBuf[ index++ ];
} while ( alreadyGenerated(res) || !board.pseudoIsLegal<0>( res, pin ) );
break;
case mpQChecksBuffer:
do
{
checksloop:
if ( index >= count )
{
phPtr++;
goto loop;
}
res = moveBuf[ index++ ];
if ( alreadyGenerated(res) )
goto checksloop;
if ( MovePack::isCastling(res) )
break;
if ( board.see<1>( res ) < 0 )
continue; // skip bad see checks
} while ( !board.pseudoIsLegal<0>( res, pin ) );
assert( board.isCheck( res, dcMask ) );
break;
case mpBadCapBuffer:
do
{
if ( index >= badCapCount )
{
phPtr++;
goto loop;
}
res = badCaps[ index++ ];
} while( alreadyGenerated(res) || !board.pseudoIsLegal<0>( res, pin ) );
break;
default: //case mpDone:
res = mcNone;
break;
}
return res & mmNoScore; // remove score
}
Move MoveGen::next()
{
Move res;
loop:
switch( *phPtr )
{
case mpCapNoSort:
count = generateCaptures( board, moveBuf );
index = 0;
phPtr++;
goto loop;
break;
case mpCastling:
assert( board.canCastle() );
index = 0;
count = board.turn() == ctWhite ?
generateCastling< ctWhite >( board, moveBuf )
: generateCastling< ctBlack >( board, moveBuf );
phPtr++;
goto loop;
break;
case mpQuietNoSort:
count = generateQuiet( board, moveBuf );
index = 0;
phPtr++;
goto loop;
break;
case mpEvasNoSort:
count = generateEvasions( board, moveBuf );
index = 0;
phPtr++;
goto loop;
break;
case mpCastlingBuffer:
if ( index >= count )
{
phPtr++;
goto loop;
}
res = moveBuf[ index++ ];
break;
case mpEvasBuffer:
do
{
if ( index >= count )
{
phPtr++;
goto loop;
}
res = moveBuf[ index++ ];
} while ( !board.pseudoIsLegal<1>( res, pin ) );
break;
case mpCapBufferNoSort:
case mpQuietBuffer:
do
{
if ( index >= count )
{
phPtr++;
goto loop;
}
res = moveBuf[ index++ ];
} while ( !board.pseudoIsLegal<0>( res, pin ) );
break;
default: //case mpDone:
res = mcNone;
break;
}
return res & mmNoScore; // remove score
}