code: def test_bitlog(self):
      from pycuda.tools import bitlog2
  
      assert bitlog2(17) == 4
      assert bitlog2(0xAFFE) == 15
      assert bitlog2(0x3AFFE) == 17
      assert bitlog2(0xCC3AFFE) == 27
  
imports: import numpy
  import numpy.linalg
  from pycuda.tools import mark_cuda_test, dtype_to_ctype
  import pytest
  import pycuda.gpuarray
  import pycuda.driver
  from pycuda.compiler import SourceModule
label_desc: Use image node_id 19 for calling the TestDriver obj's underlying member method code with example usage: obj.test_bitlog() without return types