Function round_half_to_even

dnn/src/naive/remap/opr_impl.cpp:141–154

namespace {

inline float round_half_to_even(float f) {
    const float round_away_from_zero = std::round(f);
    const float diff = round_away_from_zero - f;

    if ((diff != 0.5f) && (diff != -0.5f)) {
        return round_away_from_zero;
    }

    if (std::fmod(round_away_from_zero, 2.0f) == 0.0f) {
        return round_away_from_zero;
    }

    return f - diff;
}

}  // anonymous namespace