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/*
* Copyright (c) 2016-2020 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/NEAbsoluteDifferenceKernel.h"
#include "arm_compute/core/Error.h"
#include "arm_compute/core/Helpers.h"
#include "arm_compute/core/IAccessWindow.h"
#include "arm_compute/core/ITensor.h"
#include "arm_compute/core/TensorInfo.h"
#include "arm_compute/core/Types.h"
#include "arm_compute/core/Validate.h"
#include <arm_neon.h>
namespace arm_compute
{
namespace
{
void abs_diff_U8_U8_U8(const ITensor *in1, const ITensor *in2, ITensor *out, const Window &window)
{
Iterator input1(in1, window);
Iterator input2(in2, window);
Iterator output(out, window);
execute_window_loop(window, [&](const Coordinates &)
{
const uint8x16_t input1_val = vld1q_u8(input1.ptr());
const uint8x16_t input2_val = vld1q_u8(input2.ptr());
vst1q_u8(output.ptr(), vabdq_u8(input1_val, input2_val));
},
input1, input2, output);
}
inline int16x8x2_t vqabd2q_s16(const int16x8x2_t &v1, const int16x8x2_t &v2)
{
const int16x8x2_t res =
{
{
vqabsq_s16(vqsubq_s16(v1.val[0], v2.val[0])),
vqabsq_s16(vqsubq_s16(v1.val[1], v2.val[1]))
}
};
return res;
}
void abs_diff_S16_S16_S16(const ITensor *in1, const ITensor *in2, ITensor *out, const Window &window)
{
Iterator input1(in1, window);
Iterator input2(in2, window);
Iterator output(out, window);
execute_window_loop(window, [&](const Coordinates &)
{
int16x8x2_t input1_val = vld2q_s16(reinterpret_cast<const int16_t *>(input1.ptr()));
int16x8x2_t input2_val = vld2q_s16(reinterpret_cast<const int16_t *>(input2.ptr()));
vst2q_s16(reinterpret_cast<int16_t *>(output.ptr()), vqabd2q_s16(input1_val, input2_val));
},
input1, input2, output);
}
void abs_diff_U8_S16_S16(const ITensor *in1, const ITensor *in2, ITensor *out, const Window &window)
{
Iterator input1(in1, window);
Iterator input2(in2, window);
Iterator output(out, window);
execute_window_loop(window, [&](const Coordinates &)
{
const uint8x16_t input1_val = vld1q_u8(input1.ptr());
const int16x8x2_t input2_val =
{
{
vld1q_s16(reinterpret_cast<const int16_t *>(input2.ptr())),
vld1q_s16(reinterpret_cast<const int16_t *>(input2.ptr()) + 8)
}
};
const int16x8x2_t out_val =
{
{
vqabsq_s16(vqsubq_s16(vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(input1_val))), input2_val.val[0])),
vqabsq_s16(vqsubq_s16(vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(input1_val))), input2_val.val[1]))
}
};
vst1q_s16(reinterpret_cast<int16_t *>(output.ptr()), out_val.val[0]);
vst1q_s16(reinterpret_cast<int16_t *>(output.ptr()) + 8, out_val.val[1]);
},
input1, input2, output);
}
void abs_diff_S16_U8_S16(const ITensor *in1, const ITensor *in2, ITensor *out, const Window &window)
{
abs_diff_U8_S16_S16(in2, in1, out, window);
}
} // namespace
NEAbsoluteDifferenceKernel::NEAbsoluteDifferenceKernel()
: _func(nullptr), _input1(nullptr), _input2(nullptr), _output(nullptr)
{
}
void NEAbsoluteDifferenceKernel::configure(const ITensor *input1, const ITensor *input2, ITensor *output)
{
ARM_COMPUTE_ERROR_ON_NULLPTR(input1, input2, output);
set_shape_if_empty(*output->info(), input1->info()->tensor_shape());
if(input1->info()->data_type() == DataType::S16 || input2->info()->data_type() == DataType::S16)
{
set_format_if_unknown(*output->info(), Format::S16);
}
else if(input1->info()->data_type() == DataType::U8 || input2->info()->data_type() == DataType::U8)
{
set_format_if_unknown(*output->info(), Format::U8);
}
ARM_COMPUTE_ERROR_ON_MISMATCHING_SHAPES(input1, input2, output);
ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input1, 1, DataType::U8, DataType::S16);
ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input2, 1, DataType::U8, DataType::S16);
ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(output, 1, DataType::U8, DataType::S16);
ARM_COMPUTE_ERROR_ON_MSG(output->info()->data_type() == DataType::U8 && (input1->info()->data_type() != DataType::U8 || input2->info()->data_type() != DataType::U8),
"The output image can only be U8 if both input images are U8");
_input1 = input1;
_input2 = input2;
_output = output;
const DataType input1_data_type = input1->info()->data_type();
const DataType input2_data_type = input2->info()->data_type();
if(input1_data_type == input2_data_type)
{
if(input1_data_type == DataType::U8)
{
_func = &abs_diff_U8_U8_U8;
}
else
{
_func = &abs_diff_S16_S16_S16;
}
}
else
{
if(input1_data_type == DataType::U8)
{
_func = &abs_diff_U8_S16_S16;
}
else
{
_func = &abs_diff_S16_U8_S16;
}
}
constexpr unsigned int num_elems_processed_per_iteration = 16;
// Configure kernel window
Window win = calculate_max_window(*input1->info(), Steps(num_elems_processed_per_iteration));
AccessWindowHorizontal output_access(output->info(), 0, num_elems_processed_per_iteration);
update_window_and_padding(win,
AccessWindowHorizontal(input1->info(), 0, num_elems_processed_per_iteration),
AccessWindowHorizontal(input2->info(), 0, num_elems_processed_per_iteration),
output_access);
ValidRegion valid_region = intersect_valid_regions(input1->info()->valid_region(),
input2->info()->valid_region());
output_access.set_valid_region(win, valid_region);
INEKernel::configure(win);
}
void NEAbsoluteDifferenceKernel::run(const Window &window, const ThreadInfo &info)
{
ARM_COMPUTE_UNUSED(info);
ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(INEKernel::window(), window);
ARM_COMPUTE_ERROR_ON(_func == nullptr);
_func(_input1, _input2, _output, window);
}
} // namespace arm_compute
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