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/NEBox3x3Kernel.h"
25
26 #include "arm_compute/core/Coordinates.h"
27 #include "arm_compute/core/Helpers.h"
28 #include "arm_compute/core/IAccessWindow.h"
29 #include "arm_compute/core/ITensor.h"
30 #include "arm_compute/core/Validate.h"
31 #include "src/core/NEON/INEKernel.h"
32 #include "src/core/helpers/AutoConfiguration.h"
33 #include "src/core/helpers/WindowHelpers.h"
34
35 #include <arm_neon.h>
36
37 using namespace arm_compute;
38
calculate_kernel(const uint8x16_t & top_data,const uint8x16_t & mid_data,const uint8x16_t & bot_data)39 int16x8_t calculate_kernel(const uint8x16_t &top_data, const uint8x16_t &mid_data, const uint8x16_t &bot_data)
40 {
41 const int16x8x2_t top_s16 =
42 {
43 {
44 vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(top_data))),
45 vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(top_data)))
46 }
47 };
48 const int16x8x2_t mid_s16 =
49 {
50 {
51 vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(mid_data))),
52 vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(mid_data)))
53 }
54 };
55 const int16x8x2_t bot_s16 =
56 {
57 {
58 vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(bot_data))),
59 vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(bot_data)))
60 }
61 };
62
63 //top left
64 int16x8_t out = top_s16.val[0];
65 //top mid
66 out = vaddq_s16(out, vextq_s16(top_s16.val[0], top_s16.val[1], 1));
67 //top right
68 out = vaddq_s16(out, vextq_s16(top_s16.val[0], top_s16.val[1], 2));
69 //mid left
70 out = vaddq_s16(out, mid_s16.val[0]);
71 //mid mid
72 out = vaddq_s16(out, vextq_s16(mid_s16.val[0], mid_s16.val[1], 1));
73 //mid right
74 out = vaddq_s16(out, vextq_s16(mid_s16.val[0], mid_s16.val[1], 2));
75 //bot left
76 out = vaddq_s16(out, bot_s16.val[0]);
77 //bot mid
78 out = vaddq_s16(out, vextq_s16(bot_s16.val[0], bot_s16.val[1], 1));
79 //bot right
80 out = vaddq_s16(out, vextq_s16(bot_s16.val[0], bot_s16.val[1], 2));
81 return out;
82 }
83
84 #ifdef __ARM_FEATURE_FP16_VECTOR_ARITHMETIC
run(const Window & window,const ThreadInfo & info)85 void NEBox3x3FP16Kernel::run(const Window &window, const ThreadInfo &info)
86 {
87 ARM_COMPUTE_UNUSED(info);
88 ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
89 ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(INESimpleKernel::window(), window);
90
91 Iterator input(_input, window);
92 Iterator output(_output, window);
93
94 unsigned char *const input_top_ptr = _input->ptr_to_element(Coordinates(-1, -1));
95 unsigned char *const input_mid_ptr = _input->ptr_to_element(Coordinates(-1, 0));
96 unsigned char *const input_bot_ptr = _input->ptr_to_element(Coordinates(-1, +1));
97
98 const float16x8_t oneovernine = vdupq_n_f16(1.0f / 9.0f);
99
100 execute_window_loop(window, [&](const Coordinates &)
101 {
102 const uint8x16_t top_data = vld1q_u8(input_top_ptr + input.offset());
103 const uint8x16_t mid_data = vld1q_u8(input_mid_ptr + input.offset());
104 const uint8x16_t bot_data = vld1q_u8(input_bot_ptr + input.offset());
105
106 int16x8_t out = calculate_kernel(top_data, mid_data, bot_data);
107
108 float16x8_t outfloat = vcvtq_f16_s16(out);
109 outfloat = vmulq_f16(outfloat, oneovernine);
110
111 vst1_u8(output.ptr(), vqmovun_s16(vcvtq_s16_f16(outfloat)));
112 },
113 input, output);
114 }
115 #endif /* __ARM_FEATURE_FP16_VECTOR_ARITHMETIC */
116
border_size() const117 BorderSize NEBox3x3Kernel::border_size() const
118 {
119 return BorderSize(1);
120 }
121
configure(const ITensor * input,ITensor * output,bool border_undefined)122 void NEBox3x3Kernel::configure(const ITensor *input, ITensor *output, bool border_undefined)
123 {
124 ARM_COMPUTE_ERROR_ON_NULLPTR(input, output);
125
126 set_shape_if_empty(*output->info(), input->info()->tensor_shape());
127
128 set_format_if_unknown(*input->info(), Format::U8);
129 set_format_if_unknown(*output->info(), Format::U8);
130
131 ARM_COMPUTE_ERROR_ON_MISMATCHING_SHAPES(input, output);
132 ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input, 1, DataType::U8);
133 ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(output, 1, DataType::U8);
134 ARM_COMPUTE_ERROR_ON_MISMATCHING_DATA_TYPES(input, output);
135
136 _input = input;
137 _output = output;
138
139 constexpr unsigned int num_elems_processed_per_iteration = 8;
140 constexpr unsigned int num_elems_read_per_iteration = 16;
141 constexpr unsigned int num_elems_written_per_iteration = 8;
142 constexpr unsigned int num_rows_read_per_iteration = 3;
143 constexpr int rect_offset_xy = -1;
144
145 // Configure kernel window
146 Window win = calculate_max_window(*input->info(), Steps(num_elems_processed_per_iteration), border_undefined, border_size());
147 AccessWindowHorizontal output_access(output->info(), 0, num_elems_written_per_iteration);
148
149 update_window_and_padding(win, AccessWindowRectangle(input->info(), rect_offset_xy, rect_offset_xy, num_elems_read_per_iteration, num_rows_read_per_iteration), output_access);
150
151 output_access.set_valid_region(win, input->info()->valid_region(), border_undefined, border_size());
152
153 INEKernel::configure(win);
154 }
155
run(const Window & window,const ThreadInfo & info)156 void NEBox3x3Kernel::run(const Window &window, const ThreadInfo &info)
157 {
158 ARM_COMPUTE_UNUSED(info);
159 ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
160 ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(INESimpleKernel::window(), window);
161
162 Iterator input(_input, window);
163 Iterator output(_output, window);
164
165 unsigned char *const input_top_ptr = _input->ptr_to_element(Coordinates(-1, -1));
166 unsigned char *const input_mid_ptr = _input->ptr_to_element(Coordinates(-1, 0));
167 unsigned char *const input_bot_ptr = _input->ptr_to_element(Coordinates(-1, +1));
168
169 const int shift = 19;
170 int value = (1 << shift) / 9 + 1; //58255 / (2^19) ~= 1/9
171 const int32x4_t oneovernine = vdupq_n_s32(value);
172
173 execute_window_loop(window, [&](const Coordinates &)
174 {
175 const uint8x16_t top_data = vld1q_u8(input_top_ptr + input.offset());
176 const uint8x16_t mid_data = vld1q_u8(input_mid_ptr + input.offset());
177 const uint8x16_t bot_data = vld1q_u8(input_bot_ptr + input.offset());
178
179 int16x8_t out = calculate_kernel(top_data, mid_data, bot_data);
180
181 int32x4_t outfloathigh = vmovl_s16(vget_high_s16(out));
182 int32x4_t outfloatlow = vmovl_s16(vget_low_s16(out));
183
184 outfloathigh = vmulq_s32(outfloathigh, oneovernine);
185 outfloatlow = vmulq_s32(outfloatlow, oneovernine);
186 outfloathigh = vshrq_n_s32(outfloathigh, shift);
187 outfloatlow = vshrq_n_s32(outfloatlow, shift);
188 out = vcombine_s16(vqmovn_s32((outfloatlow)),
189 vqmovn_s32((outfloathigh)));
190
191 vst1_u8(output.ptr(), vqmovun_s16(out));
192 },
193 input, output);
194 }
195