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/*
* Copyright (c) 2016-2019 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/NEThresholdKernel.h"
#include "arm_compute/core/Error.h"
#include "arm_compute/core/Helpers.h"
#include "arm_compute/core/ITensor.h"
#include "arm_compute/core/Validate.h"
#include <arm_neon.h>
namespace arm_compute
{
class Coordinates;
NEThresholdKernel::NEThresholdKernel()
: _func(nullptr), _input(nullptr), _output(nullptr), _threshold(0), _false_value(0), _true_value(0), _upper(0)
{
}
void NEThresholdKernel::configure(const ITensor *input, ITensor *output, uint8_t threshold, uint8_t false_value, uint8_t true_value, ThresholdType type, uint8_t upper)
{
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;
_threshold = threshold;
_false_value = false_value;
_true_value = true_value;
_upper = upper;
switch(type)
{
case ThresholdType::BINARY:
_func = &NEThresholdKernel::run_binary;
break;
case ThresholdType::RANGE:
_func = &NEThresholdKernel::run_range;
break;
default:
ARM_COMPUTE_ERROR("Thresholding type not recognized");
break;
}
constexpr unsigned int num_elems_processed_per_iteration = 16;
Window win = calculate_max_window(*input->info(), Steps(num_elems_processed_per_iteration));
AccessWindowHorizontal output_access(output->info(), 0, num_elems_processed_per_iteration);
update_window_and_padding(win, AccessWindowHorizontal(input->info(), 0, num_elems_processed_per_iteration), output_access);
output_access.set_valid_region(win, input->info()->valid_region());
INEKernel::configure(win);
}
inline void NEThresholdKernel::run_binary(const Window &window)
{
const uint8x16_t threshold = vdupq_n_u8(_threshold);
const uint8x16_t true_value = vdupq_n_u8(_true_value);
const uint8x16_t false_value = vdupq_n_u8(_false_value);
Iterator input(_input, window);
Iterator output(_output, window);
execute_window_loop(window, [&](const Coordinates &)
{
const uint8x16_t data = vld1q_u8(input.ptr());
const uint8x16_t mask = vcgtq_u8(data, threshold);
vst1q_u8(output.ptr(), vbslq_u8(mask, true_value, false_value));
},
input, output);
}
inline void NEThresholdKernel::run_range(const Window &window)
{
const uint8x16_t lower_threshold = vdupq_n_u8(_threshold);
const uint8x16_t upper_threshold = vdupq_n_u8(_upper);
const uint8x16_t true_value = vdupq_n_u8(_true_value);
const uint8x16_t false_value = vdupq_n_u8(_false_value);
Iterator input(_input, window);
Iterator output(_output, window);
execute_window_loop(window, [&](const Coordinates &)
{
const uint8x16_t data = vld1q_u8(input.ptr());
uint8x16_t mask = vcleq_u8(data, upper_threshold);
mask = vandq_u8(vcgeq_u8(data, lower_threshold), mask);
vst1q_u8(output.ptr(), vbslq_u8(mask, true_value, false_value));
},
input, output);
}
void NEThresholdKernel::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);
(this->*_func)(window);
}
} // namespace arm_compute
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