return DenseElementsAttr::get(scalar_ty, value);
  } else if (element_ty.isF64()) {
    auto value = APFloat(std::numeric_limits<double>::epsilon());
    return DenseElementsAttr::get(scalar_ty, value);
  }
  llvm_unreachable("unsupported element type for tf.SoftPlus");
}

//===----------------------------------------------------------------------===//
// ArgMax/ArgMin op utilities.