Function determine_order

src/core/tensor/tensor_math_cpp.h:90–97

this function checks whether the next index falls on a special multiplier of the outer shape so the algorithm knows when to jump over/back to a starting element of the outer shape for e.g. in [[1,4,7], [2,5,8], [3,6,9]], elements 1,2,3 are the starting elements of their respective rows this additional check only has 1 loop for 2d matrix but runtime performance might degrade to O(nlog(n)) for highe

// but runtime performance might degrade to O(nlog(n)) for higher dimensional
// tensors
int determine_order(vector<int> &shape_multipliers, int counter) {
  for (size_t n = 0; n < (shape_multipliers.size() - 1); ++n) {
    if ((counter % shape_multipliers[n]) == 0) {
      return ((shape_multipliers.size()) - 1 - n);
    }
  }
  return 0;
};

// this function updates the base indexes with the current index after every
// single traversal step,