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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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20
src/bitboard.cpp
View file

@ -451,27 +451,19 @@ namespace {
void init_sliding_attacks(Bitboard attacks[], int attackIndex[], Bitboard mask[],
const int shift[], const Bitboard mult[], int deltas[][2]) {
Bitboard b, v;
int i, j, index;
for (int i = 0, index = 0; i < 64; i++)
for (i = index = 0; i < 64; i++)
{
attackIndex[i] = index;
mask[i] = sliding_attacks(i, 0, deltas, 1, 6, 1, 6);
#if defined(IS_64BIT)
int j = (1 << (64 - shift[i]));
#else
int j = (1 << (32 - shift[i]));
#endif
j = 1 << ((CpuIs64Bit ? 64 : 32) - shift[i]);
for (int k = 0; k < j; k++)
{
Bitboard b = index_to_bitboard(k, mask[i]);
#if defined(IS_64BIT)
Bitboard v = b * mult[i];
#else
unsigned v = int(b) * int(mult[i]) ^ int(b >> 32) * int(mult[i] >> 32);
#endif
b = index_to_bitboard(k, mask[i]);
v = CpuIs64Bit ? b * mult[i] : unsigned(b * mult[i] ^ (b >> 32) * (mult[i] >> 32));
attacks[index + (v >> shift[i])] = sliding_attacks(i, b, deltas, 0, 7, 0, 7);
}
index += j;

28
src/bitcount.h
View file

@ -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)

27
src/types.h
View file

@ -146,4 +146,31 @@ inline void operator-= (T& d1, const T d2) { d1 = d1 - d2; } \
inline void operator*= (T& d, int i) { d = T(int(d) * i); } \
inline void operator/= (T& d, int i) { d = T(int(d) / i); }
/// 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(TYPES_H_INCLUDED)