Function Hash64AVX_256_Impl

tensorflow/core/lib/hash/hash.cc:231–261

}
    
inline void Hash64AVX_256_Impl(const char*& data, size_t& n, uint64& h,
                               const uint64& m, const int& r) {
  __m256i m_pack = _mm256_set1_epi64x(m);
  __m256i k;
  __m256i k_tmp;

  while (n >= 32) {
    // k packs 32 chars (bytes)
    k = _mm256_loadu_si256((const __m256i*)data);
    if (!port::kLittleEndian) {
      // change from BigEdian to LittleEdian
      swap_int64_256(k);
    }
    data += 32;
    n -= 32;

    k = _mm256_mullo_epi64_hand(k, m_pack);
    k_tmp = _mm256_srli_epi64(k, r);
    k = _mm256_xor_si256(k, k_tmp);
    k = _mm256_mullo_epi64_hand(k, m_pack);
    // reduction
    h ^= (uint64)_mm256_extract_epi64(k, 0);
    h *= m;
    h ^= (uint64)_mm256_extract_epi64(k, 1);
    h *= m;
    h ^= (uint64)_mm256_extract_epi64(k, 2);
    h *= m;
    h ^= (uint64)_mm256_extract_epi64(k, 3);
    h *= m;
  }
}

inline void Hash64AVX_128_Impl(const char*& data, size_t& n, uint64& h,
                               const uint64& m, const int& r) {