Instead of manually adjust defines in bitboard.h
now proper ones are automatically set.
It is anyhow possible to still set them manually
in case of problems.
Signed-off-by: Marco Costalba <mcostalba@gmail.com>
+// Comment following define if you prefer manually adjust
+// platform macros defined below
+#define AUTO_CONFIGURATION
+
+
+// Check for 64 bits for different compilers: Intel, MSVC and gcc
+#if defined(__x86_64) || defined(_WIN64) || (__SIZEOF_INT__ > 4)
+#define IS_64BIT
+#endif
+
+#if !defined(AUTO_CONFIGURATION) || defined(IS_64BIT)
+
//#define USE_COMPACT_ROOK_ATTACKS
//#define USE_32BIT_ATTACKS
#define USE_FOLDED_BITSCAN
//#define USE_COMPACT_ROOK_ATTACKS
//#define USE_32BIT_ATTACKS
#define USE_FOLDED_BITSCAN
//#define BITCOUNT_SWAR_32
//#define BITCOUNT_LOOP
//#define BITCOUNT_SWAR_32
//#define BITCOUNT_LOOP
+#else
+
+#define USE_32BIT_ATTACKS
+#define USE_FOLDED_BITSCAN
+#define BITCOUNT_SWAR_32