m_zuckerman added inline comments. ================ Comment at: lib/Headers/bmiintrin.h:296 @@ +295,3 @@ +/// This intrinsic corresponds to the \c TZCNT instruction. +/// +/// \param __X ---------------- We can't use #define Here. The __mm_tzcnt_32(a) intrinsics is deferent from __tzcnt_u32 in the return value. The __mm_tzcnt_32 intrinsic return sign int while the __tzcnt_u32 return unsign value.
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