opelly/Stockfish
1
0
Fork 0
mirror of https://github.com/opelly27/Stockfish.git synced 2026-05-20 15:37:47 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add more detailed pawn shelter/storm evaluation

Browse Source
This commit is contained in:
Gary Linscott
2012-03-26 07:52:10 -04:00
parent 32d3a07c67
commit 374c9e6b63
3 changed files with 102 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/bitboard.h
+25 -4
View File
@@ -214,7 +214,6 @@ inline bool single_bit(Bitboard b) {
return !(b & (b - 1));
}
/// first_1() finds the least significant nonzero bit in a nonzero bitboard.
/// pop_1st_bit() finds and clears the least significant nonzero bit in a
/// nonzero bitboard.
@@ -224,9 +223,15 @@ inline bool single_bit(Bitboard b) {
#if defined(_MSC_VER) && !defined(__INTEL_COMPILER)
FORCE_INLINE Square first_1(Bitboard b) {
unsigned long index;
_BitScanForward64(&index, b);
return (Square) index;
unsigned long index;
_BitScanForward64(&index, b);
return (Square) index;
}
FORCE_INLINE Square last_1(Bitboard b) {
unsigned long index;
_BitScanReverse64(&index, b);
return (Square) index;
}
#else
@@ -235,6 +240,12 @@ FORCE_INLINE Square first_1(Bitboard b) { // Assembly code by Heinz van Saanen
__asm__("bsfq %1, %0": "=r"(dummy): "rm"(b) );
return (Square) dummy;
}
FORCE_INLINE Square last_1(Bitboard b) {
Bitboard dummy;
__asm__("bsrq %1, %0": "=r"(dummy): "rm"(b) );
return (Square) dummy;
}
#endif
FORCE_INLINE Square pop_1st_bit(Bitboard* b) {
@@ -246,10 +257,20 @@ FORCE_INLINE Square pop_1st_bit(Bitboard* b) {
#else // if !defined(USE_BSFQ)
extern Square first_1(Bitboard b);
extern Square last_1(Bitboard b);
extern Square pop_1st_bit(Bitboard* b);
#endif
// relative_rank() returns the relative rank of the closest bit set on the Bitboard.
// Only to be used with bitboards that contain a single file.
template<Color Us>
inline Rank relative_rank(Bitboard b) {
Square s = Us == WHITE ? first_1(b)
: ~last_1(b);
return rank_of(s);
}
extern void print_bitboard(Bitboard b);
extern void bitboards_init();