View Compilation Error

0_0_37022424_13478.cpp: In function '__m256i calc(__m256i, __m256i, __m256i, __m256i)':
0_0_37022424_13478.cpp:11:17: error: cannot convert 'int' to '__m256i {aka __vector(4) long long int}' in initialization
  __m256i zero = 0;
                 ^
0_0_37022424_13478.cpp:12:32: error: could not convert '_mm256_cmpeq_epi32(a, zero)' from '__m256i {aka __vector(4) long long int}' to 'bool'
  if (_mm256_cmpeq_epi32(a, zero)) { // 迭代到最底层
                                ^
0_0_37022424_13478.cpp:16: confused by earlier errors, bailing out