#include inline __m128i _v128_comgt_epu32(const __m128i& a, const __m128i& b) { const __m128i delta = _mm_set1_epi32((int)0x80000000); return _mm_cmpgt_epi32(_mm_xor_si128(a, delta), _mm_xor_si128(b, delta)); } int main() { __m128i a, b, c; a = _mm_set1_epi32(0x00000000); b = _mm_set1_epi32(0x0000ffff); c = _v128_comgt_epu32(a, b); return 0; }