1 /*
2 * Copyright (c) 2016-2020 Arm Limited.
3 *
4 * SPDX-License-Identifier: MIT
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in all
14 * copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 */
24 #include "src/core/NEON/kernels/NEScharr3x3Kernel.h"
25
26 #include "arm_compute/core/Coordinates.h"
27 #include "arm_compute/core/Error.h"
28 #include "arm_compute/core/Helpers.h"
29 #include "arm_compute/core/ITensor.h"
30 #include "arm_compute/core/Types.h"
31 #include "arm_compute/core/Validate.h"
32 #include "src/core/helpers/AutoConfiguration.h"
33 #include "src/core/helpers/WindowHelpers.h"
34
35 #include <arm_neon.h>
36 #include <cstdint>
37
38 using namespace arm_compute;
39
40 namespace
41 {
42 const int16x8_t three = vdupq_n_s16(3);
43 const int16x8_t minus_three = vdupq_n_s16(-3);
44 const int16x8_t ten = vdupq_n_s16(10);
45 const int16x8_t minus_ten = vdupq_n_s16(-10);
46
scharr_y(const int16x8x2_t & top,const int16x8x2_t & bottom)47 inline int16x8_t scharr_y(const int16x8x2_t &top, const int16x8x2_t &bottom)
48 {
49 // Top left
50 int16x8_t out = vmulq_s16(top.val[0], minus_three);
51 // Top center
52 out = vmlaq_s16(out, vextq_s16(top.val[0], top.val[1], 1), minus_ten);
53 // Top right
54 out = vmlaq_s16(out, vextq_s16(top.val[0], top.val[1], 2), minus_three);
55
56 // Bottom left
57 out = vmlaq_s16(out, bottom.val[0], three);
58 // Bottom center
59 out = vmlaq_s16(out, vextq_s16(bottom.val[0], bottom.val[1], 1), ten);
60 // Bottom right
61 out = vmlaq_s16(out, vextq_s16(bottom.val[0], bottom.val[1], 2), three);
62
63 return out;
64 }
65
scharr_x(const int16x8x2_t & top,const int16x8x2_t & middle,const int16x8x2_t & bottom)66 inline int16x8_t scharr_x(const int16x8x2_t &top, const int16x8x2_t &middle, const int16x8x2_t &bottom)
67 {
68 // Top left
69 int16x8_t out = vmulq_s16(top.val[0], minus_three);
70 // Top right
71 out = vmlaq_s16(out, vextq_s16(top.val[0], top.val[1], 2), three);
72
73 // Middle left
74 out = vmlaq_s16(out, middle.val[0], minus_ten);
75 // Middle right
76 out = vmlaq_s16(out, vextq_s16(middle.val[0], middle.val[1], 2), ten);
77
78 // Bottom left
79 out = vmlaq_s16(out, bottom.val[0], minus_three);
80 // Bottom right
81 out = vmlaq_s16(out, vextq_s16(bottom.val[0], bottom.val[1], 2), three);
82
83 return out;
84 }
85 } // namespace
86
NEScharr3x3Kernel()87 NEScharr3x3Kernel::NEScharr3x3Kernel()
88 : _run_scharr_x(false), _run_scharr_y(false), _input(nullptr), _output_x(nullptr), _output_y(nullptr)
89 {
90 }
91
configure(const ITensor * input,ITensor * output_x,ITensor * output_y,bool border_undefined)92 void NEScharr3x3Kernel::configure(const ITensor *input, ITensor *output_x, ITensor *output_y, bool border_undefined)
93 {
94 ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input, 1, DataType::U8);
95 ARM_COMPUTE_ERROR_ON((output_x == nullptr) && (output_y == nullptr));
96
97 _run_scharr_x = output_x != nullptr;
98 _run_scharr_y = output_y != nullptr;
99
100 if(_run_scharr_x)
101 {
102 ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(output_x, 1, DataType::S16);
103 }
104
105 if(_run_scharr_y)
106 {
107 ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(output_y, 1, DataType::S16);
108 }
109
110 _input = input;
111 _output_x = output_x;
112 _output_y = output_y;
113
114 // Configure kernel window
115 constexpr unsigned int num_elems_processed_per_iteration = 8;
116 constexpr unsigned int num_elems_read_per_iteration = 16;
117 constexpr unsigned int num_elems_written_per_iteration = 8;
118 constexpr unsigned int num_rows_read_per_iteration = 3;
119
120 Window win = calculate_max_window(*input->info(), Steps(num_elems_processed_per_iteration), border_undefined, border_size());
121 AccessWindowHorizontal output_x_access(output_x == nullptr ? nullptr : output_x->info(), 0, num_elems_written_per_iteration);
122 AccessWindowHorizontal output_y_access(output_y == nullptr ? nullptr : output_y->info(), 0, num_elems_written_per_iteration);
123
124 update_window_and_padding(win,
125 AccessWindowRectangle(input->info(), -border_size().left, -border_size().top, num_elems_read_per_iteration, num_rows_read_per_iteration),
126 output_x_access,
127 output_y_access);
128
129 output_x_access.set_valid_region(win, input->info()->valid_region(), border_undefined, border_size());
130 output_y_access.set_valid_region(win, input->info()->valid_region(), border_undefined, border_size());
131
132 INEKernel::configure(win);
133 }
134
border_size() const135 BorderSize NEScharr3x3Kernel::border_size() const
136 {
137 return BorderSize(1);
138 }
139
run(const Window & window,const ThreadInfo & info)140 void NEScharr3x3Kernel::run(const Window &window, const ThreadInfo &info)
141 {
142 ARM_COMPUTE_UNUSED(info);
143 ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
144 ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(INEKernel::window(), window);
145
146 const unsigned char *const input_top_ptr = _input->ptr_to_element(Coordinates(-1, -1));
147 const unsigned char *const input_mid_ptr = _input->ptr_to_element(Coordinates(-1, 0));
148 const unsigned char *const input_bot_ptr = _input->ptr_to_element(Coordinates(-1, +1));
149
150 Iterator input(_input, window);
151 Iterator output_y;
152 Iterator output_x;
153
154 if(_run_scharr_y)
155 {
156 output_y = Iterator(_output_y, window);
157 }
158
159 if(_run_scharr_x)
160 {
161 output_x = Iterator(_output_x, window);
162 }
163
164 if(_run_scharr_x && _run_scharr_y)
165 {
166 execute_window_loop(window, [&](const Coordinates &)
167 {
168
169 const uint8x16_t top_data = vld1q_u8(input_top_ptr + input.offset());
170 const uint8x16_t mid_data = vld1q_u8(input_mid_ptr + input.offset());
171 const uint8x16_t bot_data = vld1q_u8(input_bot_ptr + input.offset());
172
173 const int16x8x2_t top_s16 =
174 {
175 {
176 vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(top_data))),
177 vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(top_data)))
178 }
179 };
180 const int16x8x2_t mid_s16 =
181 {
182 {
183 vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(mid_data))),
184 vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(mid_data)))
185 }
186 };
187 const int16x8x2_t bot_s16 =
188 {
189 {
190 vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(bot_data))),
191 vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(bot_data)))
192 }
193 };
194
195 vst1q_s16(reinterpret_cast<int16_t *>(output_x.ptr()), scharr_x(top_s16, mid_s16, bot_s16));
196 vst1q_s16(reinterpret_cast<int16_t *>(output_y.ptr()), scharr_y(top_s16, bot_s16));
197 },
198 input, output_x, output_y);
199 }
200 else if(_run_scharr_x)
201 {
202 execute_window_loop(window, [&](const Coordinates &)
203 {
204
205 const uint8x16_t top_data = vld1q_u8(input_top_ptr + input.offset());
206 const uint8x16_t mid_data = vld1q_u8(input_mid_ptr + input.offset());
207 const uint8x16_t bot_data = vld1q_u8(input_bot_ptr + input.offset());
208
209 const int16x8x2_t top_s16 =
210 {
211 {
212 vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(top_data))),
213 vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(top_data)))
214 }
215 };
216 const int16x8x2_t mid_s16 =
217 {
218 {
219 vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(mid_data))),
220 vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(mid_data)))
221 }
222 };
223 const int16x8x2_t bot_s16 =
224 {
225 {
226 vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(bot_data))),
227 vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(bot_data)))
228 }
229 };
230
231 vst1q_s16(reinterpret_cast<int16_t *>(output_x.ptr()), scharr_x(top_s16, mid_s16, bot_s16));
232 },
233 input, output_x);
234 }
235 else if(_run_scharr_y)
236 {
237 execute_window_loop(window, [&](const Coordinates &)
238 {
239
240 const uint8x16_t top_data = vld1q_u8(input_top_ptr + input.offset());
241 const uint8x16_t bot_data = vld1q_u8(input_bot_ptr + input.offset());
242
243 const int16x8x2_t top_s16 =
244 {
245 {
246 vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(top_data))),
247 vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(top_data)))
248 }
249 };
250 const int16x8x2_t bot_s16 =
251 {
252 {
253 vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(bot_data))),
254 vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(bot_data)))
255 }
256 };
257
258 vst1q_s16(reinterpret_cast<int16_t *>(output_y.ptr()), scharr_y(top_s16, bot_s16));
259 },
260 input, output_y);
261 }
262 }
263