| 442,37 → 442,7 |
|---|
| #ifndef FFS_DEFINED |
| #define FFS_DEFINED 1 |
| |
| #if defined(_MSC_VER) && _MSC_VER >= 1300 && (_M_IX86 || _M_AMD64 || _M_IA64) |
| unsigned char _BitScanForward(unsigned long* Index, unsigned long Mask); |
| #pragma intrinsic(_BitScanForward) |
| static INLINE |
| unsigned long ffs( unsigned long u ) |
| { |
| unsigned long i; |
| if (_BitScanForward(&i, u)) |
| return i + 1; |
| else |
| return 0; |
| } |
| #elif defined(PIPE_CC_MSVC) && defined(PIPE_ARCH_X86) |
| static INLINE |
| unsigned ffs( unsigned u ) |
| { |
| unsigned i; |
| |
| if (u == 0) { |
| return 0; |
| } |
| |
| __asm bsf eax, [u] |
| __asm inc eax |
| __asm mov [i], eax |
| |
| return i; |
| } |
| #elif defined(__MINGW32__) || defined(PIPE_OS_ANDROID) |
| #define ffs __builtin_ffs |
| #endif |
| |
| #endif /* FFS_DEFINED */ |
| |