| /* |
| * Copyright (c) 2016, 2017 ARM Limited. |
| * |
| * SPDX-License-Identifier: MIT |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to |
| * deal in the Software without restriction, including without limitation the |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in all |
| * copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| #include "arm_compute/core/NEON/kernels/NEGaussian3x3Kernel.h" |
| |
| #include "arm_compute/core/Coordinates.h" |
| #include "arm_compute/core/Helpers.h" |
| #include "arm_compute/core/ITensor.h" |
| #include "arm_compute/core/NEON/INEKernel.h" |
| #include "arm_compute/core/Validate.h" |
| |
| #include <arm_neon.h> |
| |
| using namespace arm_compute; |
| |
| BorderSize NEGaussian3x3Kernel::border_size() const |
| { |
| return BorderSize(1); |
| } |
| |
| void NEGaussian3x3Kernel::configure(const ITensor *input, ITensor *output, bool border_undefined) |
| { |
| ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input, 1, DataType::U8); |
| ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(output, 1, DataType::U8); |
| |
| _input = input; |
| _output = output; |
| |
| // Configure kernel window |
| constexpr unsigned int num_elems_processed_per_iteration = 8; |
| constexpr unsigned int num_elems_read_per_iteration = 16; |
| constexpr unsigned int num_elems_written_per_iteration = 8; |
| constexpr unsigned int num_rows_read_per_iteration = 3; |
| |
| Window win = calculate_max_window(*input->info(), Steps(num_elems_processed_per_iteration), border_undefined, border_size()); |
| AccessWindowHorizontal output_access(output->info(), 0, num_elems_written_per_iteration); |
| |
| update_window_and_padding(win, |
| AccessWindowRectangle(input->info(), -border_size().left, -border_size().top, num_elems_read_per_iteration, num_rows_read_per_iteration), |
| output_access); |
| |
| output_access.set_valid_region(win, input->info()->valid_region(), border_undefined, border_size()); |
| |
| INEKernel::configure(win); |
| } |
| |
| void NEGaussian3x3Kernel::run(const Window &window, const ThreadInfo &info) |
| { |
| ARM_COMPUTE_UNUSED(info); |
| ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this); |
| ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(INESimpleKernel::window(), window); |
| |
| Iterator input(_input, window); |
| Iterator output(_output, window); |
| |
| const uint8_t *input_bot_ptr = _input->ptr_to_element(Coordinates(-1, -1)); |
| const uint8_t *input_mid_ptr = _input->ptr_to_element(Coordinates(-1, 0)); |
| const uint8_t *input_top_ptr = _input->ptr_to_element(Coordinates(-1, +1)); |
| |
| static const int16x8_t two = vdupq_n_s16(2); |
| static const int16x8_t four = vdupq_n_s16(4); |
| |
| execute_window_loop(window, [&](const Coordinates & id) |
| { |
| uint8x16_t top_data = vld1q_u8(input_top_ptr + input.offset()); |
| uint8x16_t mid_data = vld1q_u8(input_mid_ptr + input.offset()); |
| uint8x16_t bot_data = vld1q_u8(input_bot_ptr + input.offset()); |
| |
| const int16x8x2_t top_s16 = |
| { |
| { |
| vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(top_data))), |
| vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(top_data))) |
| } |
| }; |
| const int16x8x2_t mid_s16 = |
| { |
| { |
| vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(mid_data))), |
| vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(mid_data))) |
| } |
| }; |
| const int16x8x2_t bot_s16 = |
| { |
| { |
| vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(bot_data))), |
| vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(bot_data))) |
| } |
| }; |
| |
| //top left |
| int16x8_t out = top_s16.val[0]; |
| //top mid |
| out = vmlaq_s16(out, vextq_s16(top_s16.val[0], top_s16.val[1], 1), two); |
| //top right |
| out = vaddq_s16(out, vextq_s16(top_s16.val[0], top_s16.val[1], 2)); |
| //mid left |
| out = vmlaq_s16(out, mid_s16.val[0], two); |
| //mid mid |
| out = vmlaq_s16(out, vextq_s16(mid_s16.val[0], mid_s16.val[1], 1), four); |
| //mid right |
| out = vmlaq_s16(out, vextq_s16(mid_s16.val[0], mid_s16.val[1], 2), two); |
| //bot left |
| out = vaddq_s16(out, bot_s16.val[0]); |
| //bot mid |
| out = vmlaq_s16(out, vextq_s16(bot_s16.val[0], bot_s16.val[1], 1), two); |
| //bot right |
| out = vaddq_s16(out, vextq_s16(bot_s16.val[0], bot_s16.val[1], 2)); |
| |
| vst1_u8(output.ptr(), vqshrun_n_s16(out, 4)); |
| }, |
| input, output); |
| } |