Add GELU (#107)

inference-engine/src/plaidml_plugin/ops/gelu.cpp

@@ -0,0 +1,22 @@
+// Copyright (C) 2020 Intel Corporation
+// SPDX-License-Identifier: Apache-2.0
+//
+
+#include "ngraph/opsets/opset.hpp"
+#include "ngraph/opsets/opset1.hpp"
+#include "plaidml/op/op.h"
+#include "plaidml_ops.hpp"
+
+using namespace plaidml;          // NOLINT[build/namespaces]
+using namespace InferenceEngine;  // NOLINT[build/namespaces]
+
+namespace PlaidMLPlugin {
+
+static OpRegistration reg("gelu", [](const Context& ctx) {
+    IE_ASSERT(ctx.operands.size() == 1);
+    auto I = ctx.operands.at(0);
+    auto O = I * 0.5 * (1 + edsl::erf(I / sqrt(2)));
+    return edsl::make_tuple(O);
+});
+
+}  // namespace PlaidMLPlugin

inference-engine/tests/functional/plugin/plaidml/shared_tests_instances/single_layer_tests/activation.cpp

@@ -41,6 +41,7 @@ const std::map<ActivationTypes, std::vector<std::vector<float>>> activationTypes
         {Selu,        {{1.6732f, 1.0507f}}},
         {Ceiling,     {{}}},
         {Swish,       {{1.0f}}},
+        {Gelu,        {{}}},
         // {Mish,        {{}}},
         {HSwish,      {{}}}
         // {SoftPlus,    {{}}}