Compute Library
 21.02
NEErodeKernel.cpp
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25 
33 
34 #include <arm_neon.h>
35 
36 namespace arm_compute
37 {
39 {
40  return BorderSize(1);
41 }
42 
43 void NEErodeKernel::configure(const ITensor *input, ITensor *output, bool border_undefined)
44 {
45  ARM_COMPUTE_ERROR_ON_NULLPTR(input, output);
48 
49  _input = input;
50  _output = output;
51 
52  constexpr unsigned int num_elems_processed_per_iteration = 8;
53  constexpr unsigned int num_elems_read_per_iteration = 16;
54  constexpr unsigned int num_elems_written_per_iteration = 8;
55  constexpr unsigned int num_rows_read_per_iteration = 3;
56 
57  // Configure kernel window
58  Window win = calculate_max_window(*input->info(), Steps(num_elems_processed_per_iteration), border_undefined, border_size());
59  AccessWindowHorizontal output_access(output->info(), 0, num_elems_written_per_iteration);
60  AccessWindowRectangle input_access(input->info(), -border_size().left, -border_size().top, num_elems_read_per_iteration, num_rows_read_per_iteration);
61 
62  update_window_and_padding(win, input_access, output_access);
63 
64  output_access.set_valid_region(win, input->info()->valid_region(), border_undefined, border_size());
65 
66  INEKernel::configure(win);
67 }
68 
70 {
71  ARM_COMPUTE_UNUSED(info);
74 
75  Iterator in(_input, window);
76  Iterator out(_output, window);
77 
78  const size_t in_stride = _input->info()->strides_in_bytes()[1];
79 
80  execute_window_loop(window, [&](const Coordinates &)
81  {
82  uint8_t *in_ptr = in.ptr() - 1;
83  const uint8x16_t top_data = vld1q_u8(in_ptr - in_stride);
84  const uint8x16_t mid_data = vld1q_u8(in_ptr);
85  const uint8x16_t bot_data = vld1q_u8(in_ptr + in_stride);
86 
87  uint8x8_t top_high_data = vget_high_u8(top_data);
88  uint8x8_t top_low_data = vget_low_u8(top_data);
89 
90  uint8x8_t mid_high_data = vget_high_u8(mid_data);
91  uint8x8_t mid_low_data = vget_low_u8(mid_data);
92 
93  uint8x8_t bot_high_data = vget_high_u8(bot_data);
94  uint8x8_t bot_low_data = vget_low_u8(bot_data);
95 
96  uint8x8_t p0;
97  uint8x8_t p1;
98 
99  p0 = top_low_data;
100  p1 = vext_u8(top_low_data, top_high_data, 1);
101  p0 = vmin_u8(p0, p1);
102 
103  p1 = vext_u8(top_low_data, top_high_data, 2);
104  p0 = vmin_u8(p0, p1);
105 
106  p1 = mid_low_data;
107  p0 = vmin_u8(p0, p1);
108 
109  p1 = vext_u8(mid_low_data, mid_high_data, 1);
110  p0 = vmin_u8(p0, p1);
111 
112  p1 = vext_u8(mid_low_data, mid_high_data, 2);
113  p0 = vmin_u8(p0, p1);
114 
115  p1 = bot_low_data;
116  p0 = vmin_u8(p0, p1);
117 
118  p1 = vext_u8(bot_low_data, bot_high_data, 1);
119  p0 = vmin_u8(p0, p1);
120 
121  p1 = vext_u8(bot_low_data, bot_high_data, 2);
122  p0 = vmin_u8(p0, p1);
123 
124  vst1_u8(out.ptr(), p0);
125  },
126  in, out);
127 }
128 } // namespace arm_compute
unsigned int top
top of the border
Definition: Types.h:375
Window calculate_max_window(const ValidRegion &valid_region, const Steps &steps, bool skip_border, BorderSize border_size)
const Window & window() const
The maximum window the kernel can be executed on.
Definition: IKernel.cpp:28
Container for 2D border size.
Definition: Types.h:273
1 channel, 1 U8 per channel
Interface for Neon tensor.
Definition: ITensor.h:36
Copyright (c) 2017-2021 Arm Limited.
virtual ValidRegion valid_region() const =0
Valid region of the tensor.
BorderSize border_size() const override
The size of the border for that kernel.
Implementation of a rectangular access pattern.
bool update_window_and_padding(Window &win, Ts &&... patterns)
Update window and padding size for each of the access patterns.
Definition: WindowHelpers.h:46
#define ARM_COMPUTE_UNUSED(...)
To avoid unused variables warnings.
Definition: Error.h:152
#define ARM_COMPUTE_ERROR_ON_MISMATCHING_DATA_TYPES(...)
Definition: Validate.h:543
Class to describe a number of elements in each dimension.
Definition: Steps.h:40
Coordinates of an item.
Definition: Coordinates.h:37
Implementation of a row access pattern.
void run(const Window &window, const ThreadInfo &info) override
Execute the kernel on the passed window.
virtual ITensorInfo * info() const =0
Interface to be implemented by the child class to return the tensor&#39;s metadata.
constexpr uint8_t * ptr() const
Return a pointer to the current pixel.
Definition: Helpers.inl:139
unsigned int left
left of the border
Definition: Types.h:378
#define ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(k)
Definition: Validate.h:941
#define ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(t, c,...)
Definition: Validate.h:790
ScaleKernelInfo info(interpolation_policy, default_border_mode, PixelValue(), sampling_policy, false)
Information about executing thread and CPU.
Definition: CPPTypes.h:235
void configure(const ITensor *input, ITensor *output, bool border_undefined)
Set the source, destination and border mode of the kernel.
unsigned int num_elems_processed_per_iteration
#define ARM_COMPUTE_ERROR_ON_NULLPTR(...)
Definition: Validate.h:161
void execute_window_loop(const Window &w, L &&lambda_function, Ts &&... iterators)
Iterate through the passed window, automatically adjusting the iterators and calling the lambda_funct...
Definition: Helpers.inl:77
Iterator updated by execute_window_loop for each window element.
Definition: Helpers.h:46
Describe a multidimensional execution window.
Definition: Window.h:39
#define ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(f, s)
Definition: Validate.h:205