algorithm.getType().getRank()) {
      return op.emitOpError() << "algorithm must be a constant scalar";
    }
    auto alg = static_cast<tensorflow::Algorithm>(
        algorithm.getValues<IntegerAttr>()[0].getInt());
    auto xla_alg = TensorFlowRngAlgToXla(alg);
    if (!xla_alg) {
      return op.emitOpError() << "unknown algorithm";
    }