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Fix windows clang compiling

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_lzcnt_u64 may not supported by native LLVM compiler on Windows.
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Maxwell Geng 2025-08-07 14:12:36 +08:00 • committed by GitHub
parent 639b73ecf9
commit dd71c5c6ac
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include/mimalloc/bits.h
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@ -226,7 +226,7 @@ static inline size_t mi_clz(size_t x) {
size_t r; size_t r;
__asm ("lzcnt\t%1, %0" : "=r"(r) : "r"(x) : "cc"); __asm ("lzcnt\t%1, %0" : "=r"(r) : "r"(x) : "cc");
return r; return r;
#elif defined(_MSC_VER) && MI_ARCH_X64 && defined(__BMI1__) #elif defined(_MSC_VER) && !defined(__clang__) && MI_ARCH_X64 && defined(__BMI1__)
return _lzcnt_u64(x); return _lzcnt_u64(x);
#elif defined(_MSC_VER) && (MI_ARCH_X64 || MI_ARCH_X86 || MI_ARCH_ARM64 || MI_ARCH_ARM32) #elif defined(_MSC_VER) && (MI_ARCH_X64 || MI_ARCH_X86 || MI_ARCH_ARM64 || MI_ARCH_ARM32)
unsigned long idx; unsigned long idx;