Function CompareLt

cpp/src/arrow/util/float16.h:163–178

    return (lhs.bits() == rhs.bits()) || (lhs.is_zero() && rhs.is_zero());
  }
  static constexpr bool CompareLt(Float16 lhs, Float16 rhs) {
    if (lhs.signbit()) {
      if (rhs.signbit()) {
        // Both are negative
        return lhs.bits() > rhs.bits();
      } else {
        // Handle +/-0
        return !lhs.is_zero() || rhs.bits() != 0;
      }
    } else if (rhs.signbit()) {
      return false;
    } else {
      // Both are positive
      return lhs.bits() < rhs.bits();
    }
  }
};

static_assert(std::is_standard_layout_v<Float16>);