code: def test_shfl_down(self, dtype):
      N = 5
      # __shfl_down() on HIP does not seem to have the same behavior...
      block = cupy._core._get_warpsize()
  
      @jit.rawkernel()
      def f(a):
          value = jit.shfl_down_sync(0xFFFFFFFF, a[jit.threadIdx.x], N)
          a[jit.threadIdx.x] = value
  
      a = cupy.arange(block, dtype=dtype)
      f[1, block](a)
      expected = [i for i in range(N, block)]
      expected += [(block - N + i) for i in range(N)]
      assert (a == cupy.asarray(expected, dtype=dtype)).all()
  
imports: import numpy
  import pytest
  import cupy
  from cupyx import jit
  from cupy import testing
  from cupy.cuda import device
  from cupy.cuda import runtime
label_desc: Use image node_id 42 for calling the TestRaw obj's underlying member method code with example usage: obj.test_shfl_down(dtype) without return types