1 files changed, 114 insertions, 0 deletions
diff --git a/compute/ARMComputeEx/src/core/CL/kernels/CLEmbeddingLookupKernel.cpp b/compute/ARMComputeEx/src/core/CL/kernels/CLEmbeddingLookupKernel.cpp
new file mode 100644
index 000000000..0862b78bf
--- /dev/null
+++ b/compute/ARMComputeEx/src/core/CL/kernels/CLEmbeddingLookupKernel.cpp
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2018 Samsung Electronics Co., Ltd. All Rights Reserved
+ * Copyright (c) 2017 ARM Limited.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "arm_compute/core/CL/kernels/CLEmbeddingLookupKernel.h"
+
+#include "arm_compute/core/CL/CLHelpers.h"
+#include "arm_compute/core/CL/CLKernelLibraryEx.h"
+#include "arm_compute/core/CL/ICLTensor.h"
+
+using namespace arm_compute;
+
+namespace
+{
+constexpr unsigned int num_elems_processed_per_iteration = 16;
+
+std::pair<Status, Window> validate_and_configure_window(ITensorInfo *input, ITensorInfo *output)
+{
+  Window win = calculate_max_window(*output, Steps(num_elems_processed_per_iteration));
+  AccessWindowHorizontal input_access(input, 0, num_elems_processed_per_iteration);
+  AccessWindowHorizontal output_access(output, 0, num_elems_processed_per_iteration);
+
+  bool window_changed = update_window_and_padding(win, input_access, output_access);
+  input_access.set_valid_region(win, output->valid_region());
+
+  Status err = (window_changed)
+                   ? ARM_COMPUTE_CREATE_ERROR(ErrorCode::RUNTIME_ERROR, "Insufficient Padding!")
+                   : Status{};
+  return std::make_pair(err, win);
+}
+} // namespace
+
+CLEmbeddingLookupKernel::CLEmbeddingLookupKernel()
+    : _input(nullptr), _output(nullptr), _lookups(nullptr)
+{
+}
+
+Status CLEmbeddingLookupKernel::validate(const ITensorInfo *input, const ITensorInfo *output,
+                                         const ITensorInfo *lookups)
+{
+  ARM_COMPUTE_ERROR_ON_NULLPTR(input, output, lookups);
+  ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(
+      input, 1, DataType::U8, DataType::S8, DataType::QASYMM8, DataType::U16, DataType::S16,
+      DataType::U32, DataType::S32, DataType::F16, DataType::F32);
+  ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(lookups, 1, DataType::S32);
+  ARM_COMPUTE_ERROR_ON_MISMATCHING_DATA_TYPES(input, output);
+
+  ARM_COMPUTE_ERROR_ON(input->num_dimensions() < 2 && input->num_dimensions() > 4);
+  ARM_COMPUTE_ERROR_ON(lookups->num_dimensions() > 1);
+
+  return Status{};
+}
+
+void CLEmbeddingLookupKernel::configure(const ICLTensor *input, ICLTensor *output,
+                                        const ICLTensor *lookups)
+{
+  ARM_COMPUTE_ERROR_THROW_ON(validate(input->info(), output->info(), lookups->info()));
+
+  _input = input;
+  _output = output;
+  _lookups = lookups;
+
+  // Set kernel build options
+  std::stringstream kernel_name;
+  std::set<std::string> build_opts;
+  kernel_name << "embedding_lookup";
+
+  build_opts.emplace("-DDEPTH_OUT=" + support::cpp11::to_string(output->info()->dimension(2)));
+  build_opts.emplace("-DDATA_TYPE=" + get_cl_type_from_data_type(input->info()->data_type()));
+  build_opts.emplace("-DVEC_SIZE=" + support::cpp11::to_string(num_elems_processed_per_iteration));
+  build_opts.emplace("-DNUM_DIMS=" + support::cpp11::to_string(_input->info()->num_dimensions()));
+
+  // Create kernel
+  _kernel = static_cast<cl::Kernel>(
+      CLKernelLibraryEx::get().create_kernel(kernel_name.str(), build_opts));
+
+  // Configure kernel window
+  auto win_config = validate_and_configure_window(input->info(), output->info());
+  ARM_COMPUTE_ERROR_THROW_ON(win_config.first);
+  ICLKernel::configure_internal(win_config.second);
+}
+
+void CLEmbeddingLookupKernel::run(const Window &window, cl::CommandQueue &queue)
+{
+  ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
+  ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(IKernel::window(), window);
+
+  Window slice_in = window.first_slice_window_4D().collapse(ICLKernel::window(), 2, 4);
+
+  Window win_lookup;
+  win_lookup.set(Window::DimX, Window::Dimension(0, 0, 0));
+
+  do
+  {
+    unsigned int idx = 0;
+    add_4D_tensor_argument(idx, _input, slice_in);
+    add_4D_tensor_argument(idx, _output, slice_in);
+    add_1D_tensor_argument(idx, _lookups, win_lookup);
+
+    enqueue(queue, *this, slice_in);
+  } while (window.slide_window_slice_4D(slice_in) && window.slide_window_slice_1D(win_lookup));
+}