Well to look at the last of that list. It added 134 - 3 lines to the project.

Of which, the actual change was

    -        __m256i mul_one;
    -            mul_one = _mm256_abs_epi8(_mm256_cmpeq_epi16(mul_one,mul_one)); // set all vector elements to 1
    +        __m256i mul_one = _mm256_set1_epi8(1);

and the rest was testing that fix.