code: def gcd_bin(u, v):
      u, v = abs(u), abs(v)  # u >= 0, v >= 0
      if u < v:
          u, v = v, u  # u >= v >= 0
      if v == 0:
          return u
  
      # u >= v > 0
      k = 1
      while u & 1 == 0 and v & 1 == 0:  # u, v - even
          u >>= 1
          v >>= 1
          k <<= 1
  
      t = -v if u & 1 else u
      while t:
          while t & 1 == 0:
              t >>= 1
          if t > 0:
              u = t
          else:
              v = -t
          t = u - v
      return u * k
  
label_desc: Use image node_id 3 for calling a global function with example usage: gcd_bin(u, v) and returns: unknown, u