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Remove defined(IS_64BIT) in init_sliding_attacks()

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No functional change bith in 32 and 64 bits.

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba
2011-01-29 13:59:23 +01:00
parent f3e0b32def
commit 69726f4df3
3 changed files with 33 additions and 42 deletions
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28
src/bitcount.h
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@@ -96,32 +96,4 @@ inline int count_1s<CNT_POPCNT>(Bitboard b) {
#endif
}
/// cpu_has_popcnt() detects support for popcnt instruction at runtime
inline bool cpu_has_popcnt() {
int CPUInfo[4] = {-1};
__cpuid(CPUInfo, 0x00000001);
return (CPUInfo[2] >> 23) & 1;
}
/// CpuHasPOPCNT is a global constant initialized at startup that
/// is set to true if CPU on which application runs supports popcnt
/// hardware instruction. Unless USE_POPCNT is not defined.
#if defined(USE_POPCNT)
const bool CpuHasPOPCNT = cpu_has_popcnt();
#else
const bool CpuHasPOPCNT = false;
#endif
/// CpuIs64Bit is a global constant initialized at compile time that
/// is set to true if CPU on which application runs is a 64 bits.
#if defined(IS_64BIT)
const bool CpuIs64Bit = true;
#else
const bool CpuIs64Bit = false;
#endif
#endif // !defined(BITCOUNT_H_INCLUDED)