Compute Library
 21.02
Reverse.cpp
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24 #include "Reverse.h"
25 
26 #include "arm_compute/core/Types.h"
28 
29 namespace arm_compute
30 {
31 namespace test
32 {
33 namespace validation
34 {
35 namespace reference
36 {
37 template <typename T>
39 {
40  ARM_COMPUTE_ERROR_ON(axis.shape().num_dimensions() > 1);
41  ARM_COMPUTE_ERROR_ON(axis.shape().x() > 4);
42 
43  // Create reference
44  SimpleTensor<T> dst{ src.shape(), src.data_type(), src.num_channels(), src.quantization_info() };
45 
46  const unsigned int width = src.shape()[0];
47  const unsigned int height = src.shape()[1];
48  const unsigned int depth = src.shape()[2];
49  const unsigned int batches = src.shape()[3];
50 
51  std::array<bool, 4> to_reverse = { { false, false, false, false } };
52  for(int i = 0; i < axis.num_elements(); ++i)
53  {
54  to_reverse[axis[i]] = true;
55  }
56 
57  const uint32_t num_elements = src.num_elements();
58 
59 #if defined(_OPENMP)
60  #pragma omp parallel for
61 #endif /* _OPENMP */
62  for(uint32_t i = 0; i < num_elements; ++i)
63  {
64  const Coordinates src_coord = index2coord(src.shape(), i);
65  const unsigned int dst_x = to_reverse[0] ? width - src_coord[0] - 1 : src_coord[0];
66  const unsigned int dst_y = to_reverse[1] ? height - src_coord[1] - 1 : src_coord[1];
67  const unsigned int dst_z = to_reverse[2] ? depth - src_coord[2] - 1 : src_coord[2];
68  const unsigned int dst_w = to_reverse[3] ? batches - src_coord[3] - 1 : src_coord[3];
69 
70  dst[coord2index(src.shape(), Coordinates(dst_x, dst_y, dst_z, dst_w))] = src[i];
71  }
72 
73  return dst;
74 }
75 
79 } // namespace reference
80 } // namespace validation
81 } // namespace test
82 } // namespace arm_compute
SimpleTensor< T > reverse(const SimpleTensor< T > &src, const SimpleTensor< uint32_t > &axis)
Definition: Reverse.cpp:38
unsigned int batches
DataType data_type() const override
Data type of the tensor.
Definition: SimpleTensor.h:357
#define ARM_COMPUTE_ERROR_ON(cond)
If the condition is true then an error message is printed and an exception thrown.
Definition: Error.h:466
TensorShape shape() const override
Shape of the tensor.
Definition: SimpleTensor.h:320
SimpleTensor< float > src
Definition: DFT.cpp:155
Copyright (c) 2017-2021 Arm Limited.
int coord2index(const TensorShape &shape, const Coordinates &coord)
Linearise the given coordinate.
Definition: Utils.h:489
Coordinates of an item.
Definition: Coordinates.h:37
Coordinates index2coord(const TensorShape &shape, int index)
Convert a linear index into n-dimensional coordinates.
Definition: Utils.h:460
Simple tensor object that stores elements in a consecutive chunk of memory.
Definition: SimpleTensor.h:58
int num_channels() const override
Number of channels of the tensor.
Definition: SimpleTensor.h:370
int num_elements() const override
Number of elements of the tensor.
Definition: SimpleTensor.h:406
QuantizationInfo quantization_info() const override
Quantization info in case of asymmetric quantized type.
Definition: SimpleTensor.h:332