i32_max_ = QuantizedType::getDefaultMaximumForInteger(kSigned, k32Bits);
  any_ = AnyQuantizedType();
  qi8_ = AnyQuantizedType::get(kSigned, i8_, f32_, i8_min_, i8_max_);
  qi8n_ = AnyQuantizedType::get(kSigned, i8_, f32_, i8_min_ + 1, i8_max_);
  qi32_ = AnyQuantizedType::get(kSigned, i32_, f32_, i32_min_, i32_max_);
  assert(qi8n_ == qi8n_);
}

std::optional<KernelSpec> DeviceTarget::GetKernelSpec(

  ScaleDecomposeFn GetDecomposeFn(quantfork::QuantizeRegionOp op) const;

  // converts specification to signature:
  // - UniformedQuantizedType -> AnyQuantizedType
  // - AnyQuantizedType (int) -> AnyQuantizedType
  // - Float -> {}
  static void AppendToSignature(Type spec, KernelSpecs::Signature* signature);

 protected:
  // Adds the kernel spec with the custom scale function for the kernel.