mmintrin.h typedef union __declspec(intrin_type) _CRT_ALIGN(8) __m64 { unsigned __int64 m64_u64; float m64_f32[2]; __int8 m64_i8[8]; __int16 m64_i16[4]; __int32 m64_i32[2]; __int64 m64_i64; unsigned __int8 m64_u8[8]; unsigned __int16 m64_u16[4]; unsigned __int32 m64_u32[2]; } __m64; __m128
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