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Show First 20 Lines • Show All 70 Lines • ▼ Show 20 Lines	int __libcpp_ctz(unsigned long __x) {
static_assert(sizeof(unsigned long) == sizeof(unsigned), "");		static_assert(sizeof(unsigned long) == sizeof(unsigned), "");
return __ctz(static_cast<unsigned>(__x));		return __ctz(static_cast<unsigned>(__x));
}		}

inline _LIBCPP_INLINE_VISIBILITY		inline _LIBCPP_INLINE_VISIBILITY
int __libcpp_ctz(unsigned long long __x) {		int __libcpp_ctz(unsigned long long __x) {
unsigned long __where;		unsigned long __where;
#if defined(_LIBCPP_HAS_BITSCAN64)		#if defined(_LIBCPP_HAS_BITSCAN64)
(defined(_M_AMD64) \|\| defined(__x86_64__))
if (_BitScanForward64(&__where, __x))		if (_BitScanForward64(&__where, __x))
return static_cast<int>(__where);		return static_cast<int>(__where);
#else		#else
// Win32 doesn't have _BitScanForward64 so emulate it with two 32 bit calls.		// Win32 doesn't have _BitScanForward64 so emulate it with two 32 bit calls.
if (_BitScanForward(&__where, static_cast<unsigned long>(__x)))		if (_BitScanForward(&__where, static_cast<unsigned long>(__x)))
return static_cast<int>(__where);		return static_cast<int>(__where);
if (_BitScanForward(&__where, static_cast<unsigned long>(__x >> 32)))		if (_BitScanForward(&__where, static_cast<unsigned long>(__x >> 32)))
return static_cast<int>(__where + 32);		return static_cast<int>(__where + 32);
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[NFC][libc++] Fix _LIBCPP_HAS_BITSCAN64 usage.ClosedPublic