code: def _fwd_kern():
      return cuda.elementwise(
          "T x, T cond, T W",
          "T y",
          "y = cond >= 0 ? x : (T)(x * W)",
          "prelu",
      )
  
imports: import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import function_node
  from chainer.utils import type_check
label_desc: Use image node_id 1 for calling a global function with example usage: _fwd_kern() and returns: cuda