1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "EmbeddingLookup.h"
18
19#include "CpuExecutor.h"
20#include "HalInterfaces.h"
21#include "Operations.h"
22
23namespace android {
24namespace nn {
25
26EmbeddingLookup::EmbeddingLookup(const Operation& operation,
27                                 std::vector<RunTimeOperandInfo>& operands) {
28  value_ = GetInput(operation, operands, kValueTensor);
29  lookup_ = GetInput(operation, operands, kLookupTensor);
30
31  output_ = GetOutput(operation, operands, kOutputTensor);
32}
33
34bool EmbeddingLookup::Eval() {
35  const int row_size = value_->shape().dimensions[0];
36  const int total_bytes = sizeOfData(value_->type, value_->dimensions);
37  const int row_bytes = total_bytes/row_size;
38
39  for (uint32_t i = 0; i < lookup_->shape().dimensions[0]; i++) {
40    int idx = (reinterpret_cast<int*>(lookup_->buffer))[i];
41    if (idx >= row_size || idx < 0) {
42      LOG(ERROR) << "Embedding Lookup: index out of bounds.";
43      return false;
44    } else {
45      memcpy(output_->buffer + i * row_bytes, value_->buffer + idx * row_bytes,
46             row_bytes);
47    }
48  }
49
50  return true;
51}
52
53}  // namespace nn
54}  // namespace android
55