src/core/NEON/kernels/NEDepthConvertKernel.cpp - ml/ComputeLibrary - Gitiles

 /*
  * 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/NEDepthConvertKernel.h"

 #include "arm_compute/core/Error.h"
 #include "arm_compute/core/Helpers.h"
 #include "arm_compute/core/ITensor.h"
 #include "arm_compute/core/NEON/NEFixedPoint.h"
 #include "arm_compute/core/TensorInfo.h"
 #include "arm_compute/core/Validate.h"

 #include <arm_neon.h>

 using namespace arm_compute;

 namespace arm_compute
 {
 class Coordinates;
 } // namespace arm_compute

 NEDepthConvertKernel::NEDepthConvertKernel()
     : _input(nullptr), _output(nullptr), _policy(), _shift(0), _fixed_point_position_input(0), _fixed_point_position_output(0)
 {
 }

 void NEDepthConvertKernel::configure(ITensor *input, ITensor *output, ConvertPolicy policy, uint32_t shift)
 {
     ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input, 1, DataType::U8, DataType::QS8, DataType::S16, DataType::U16, DataType::QS16, DataType::F32);

     _input  = input;
     _output = input;
     _policy = policy;
     _shift  = shift;

     if(output != nullptr)
     {
         // Auto initialize output shape if not initialized (We can only auto-configure the shape, datatype must be given)
         set_shape_if_empty(*output->info(), input->info()->tensor_shape());

         ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(output, 1, DataType::U8, DataType::QS8, DataType::S16, DataType::U16, DataType::QS16, DataType::U32, DataType::S32, DataType::F32);
         ARM_COMPUTE_ERROR_ON_MISMATCHING_SHAPES(input, output);

         // Set output
         _output = output;
     }

     // Set initial fixed point position of input and output
     _fixed_point_position_input  = input->info()->fixed_point_position();
     _fixed_point_position_output = _output->info()->fixed_point_position();

     // Set the fixed point position to the output tensor if needed
     if(is_data_type_fixed_point(input->info()->data_type()) && is_data_type_fixed_point(_output->info()->data_type()))
     {
         // If in-place set the fixed point position of the output tensor to be equal to shift
         _fixed_point_position_output = (_input == _output) ? static_cast<int>(_shift) : _fixed_point_position_output;
         // Set fixed point position to output tensor
         _output->info()->set_fixed_point_position(_fixed_point_position_output);
     }

     ARM_COMPUTE_ERROR_ON(shift >= 8 && (!is_data_type_fixed_point(input->info()->data_type()) && !is_data_type_fixed_point(output->info()->data_type())));
     ARM_COMPUTE_ERROR_ON(input == output && (data_size_from_type(input->info()->data_type()) != data_size_from_type(output->info()->data_type())));

     ARM_COMPUTE_ERROR_ON_MSG(input->info()->data_type() == DataType::U8 && (output->info()->data_type() != DataType::S16 && output->info()->data_type() != DataType::U16
                                                                             && output->info()->data_type() != DataType::S32),
                              "Only data_types supported [in] U8 -> [out] U16, S16, S32");

     ARM_COMPUTE_ERROR_ON_MSG(input->info()->data_type() == DataType::QS8 && (output->info()->data_type() != DataType::QS8 && output->info()->data_type() != DataType::F32),
                              "Only data_types supported [in] QS8 ->  [out] QS8, F32");

     ARM_COMPUTE_ERROR_ON_MSG(input->info()->data_type() == DataType::U16 && (output->info()->data_type() != DataType::U8 && output->info()->data_type() != DataType::U32),
                              "Only data_types supported [in] U16 ->  [out] U8, U32");

     ARM_COMPUTE_ERROR_ON_MSG(input->info()->data_type() == DataType::S16 && (output->info()->data_type() != DataType::U8 && output->info()->data_type() != DataType::S32),
                              "Only data_types supported [in] S16 ->  [out] U8, S32");

     ARM_COMPUTE_ERROR_ON_MSG(input->info()->data_type() == DataType::QS16 && (output->info()->data_type() != DataType::QS16 && output->info()->data_type() != DataType::F32),
                              "Only data_types supported [in] QS16 ->  [out] QS16, F32");

     ARM_COMPUTE_ERROR_ON_MSG(input->info()->data_type() == DataType::F32 && (output->info()->data_type() != DataType::QS8 && output->info()->data_type() != DataType::QS16),
                              "Only data_types supported [in] F32 ->  [out] QS8, QS16");

     constexpr unsigned int num_elems_processed_per_iteration = 16;

     // Configure kernel window
     Window win = calculate_max_window(*input->info(), Steps(num_elems_processed_per_iteration));

     AccessWindowHorizontal input_access(input->info(), 0, num_elems_processed_per_iteration);
     if(output != nullptr)
     {
         AccessWindowHorizontal output_access(output->info(), 0, num_elems_processed_per_iteration);
         update_window_and_padding(win, input_access, output_access);
         output_access.set_valid_region(win, input->info()->valid_region());
     }
     else
     {
         // In-place computation
         update_window_and_padding(win, input_access);
     }
     ICPPKernel::configure(win);
 }

 void NEDepthConvertKernel::run(const Window &window, const ThreadInfo &info)
 {
     ARM_COMPUTE_UNUSED(info);
     ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
     ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(IKernel::window(), window);
     ARM_COMPUTE_ERROR_ON(nullptr == _input);
     ARM_COMPUTE_ERROR_ON(nullptr == _output);
     ARM_COMPUTE_ERROR_ON(_input == _output);

     Iterator input(_input, window);
     Iterator output(_output, window);

     bool in_place = (_input == _output);

     switch(_input->info()->data_type())
     {
         case DataType::U8:
         {
             const int16x8_t b = vdupq_n_s16(_shift);

             switch(_output->info()->data_type())
             {
                 case DataType::S16:
                 {
                     /* Up-conversion U8 -> S16 */
                     execute_window_loop(window, [&](const Coordinates & id)
                     {
                         const uint8x16_t texels_u8 = vld1q_u8(input.ptr());

                         const int16x8x2_t texels =
                         {
                             {
                                 vshlq_s16(vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(texels_u8))), b),
                                 vshlq_s16(vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(texels_u8))), b)
                             }
                         };

                         vst1q_s16(reinterpret_cast<int16_t *>(output.ptr()), texels.val[0]);
                         vst1q_s16(reinterpret_cast<int16_t *>(output.ptr()) + 8, texels.val[1]);
                     },
                     input, output);
                     break;
                 }
                 case DataType::S32:
                 {
                     /* Up-conversion U8 -> S32 */
                     execute_window_loop(window, [&](const Coordinates & id)
                     {
                         const uint8x16_t texels_u8 = vld1q_u8(input.ptr());

                         const int16x8x2_t texels =
                         {
                             {
                                 vshlq_s16(vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(texels_u8))), b),
                                 vshlq_s16(vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(texels_u8))), b)
                             }
                         };

                         vst1q_s32(reinterpret_cast<int32_t *>(output.ptr()), vmovl_s16(vget_low_s16(texels.val[0])));
                         vst1q_s32(reinterpret_cast<int32_t *>(output.ptr()) + 4, vmovl_s16(vget_high_s16(texels.val[0])));
                         vst1q_s32(reinterpret_cast<int32_t *>(output.ptr()) + 8, vmovl_s16(vget_low_s16(texels.val[1])));
                         vst1q_s32(reinterpret_cast<int32_t *>(output.ptr()) + 12, vmovl_s16(vget_high_s16(texels.val[1])));
                     },
                     input, output);
                     break;
                 }
                 case DataType::U16:
                 {
                     /* Up-conversion U8 -> U16 */
                     execute_window_loop(window, [&](const Coordinates & id)
                     {
                         const uint8x16_t texels_u8 = vld1q_u8(input.ptr());

                         const uint16x8x2_t texels =
                         {
                             {
                                 vshlq_u16(vmovl_u8(vget_low_u8(texels_u8)), b),
                                 vshlq_u16(vmovl_u8(vget_high_u8(texels_u8)), b)
                             }
                         };

                         vst1q_u16(reinterpret_cast<uint16_t *>(output.ptr()), texels.val[0]);
                         vst1q_u16(reinterpret_cast<uint16_t *>(output.ptr()) + 8, texels.val[1]);
                     },
                     input, output);
                     break;
                 }
                 default:
                     ARM_COMPUTE_ERROR("Output data type not supported");
             }
             break;
         }
         case DataType::QS8:
         {
             switch(_output->info()->data_type())
             {
                 case DataType::QS8:
                 {
                     const int relative_shift = _fixed_point_position_output - _fixed_point_position_input;
                     /* Fixed point position conversion QS8 -> QS8 */
                     if(relative_shift != 0 || !in_place)
                     {
                         const auto relative_shift_vec = vdupq_n_qs8(relative_shift);
                         execute_window_loop(window, [&](const Coordinates & id)
                         {
                             const qint8x16_t texels_qs8 = vld1q_qs8(reinterpret_cast<const qint8_t *>(input.ptr()));
                             vst1q_qs8(reinterpret_cast<qint8_t *>(output.ptr()), vqrshlq_s8(texels_qs8, relative_shift_vec));
                         },
                         input, output);
                     }
                     break;
                 }
                 case DataType::F32:
                 {
                     /* Up-conversion QS8 -> F32 */
                     execute_window_loop(window, [&](const Coordinates & id)
                     {
                         const qint8x16_t texels_qs8 = vld1q_qs8(reinterpret_cast<const qint8_t *>(input.ptr()));

                         float32x4x2_t texels_low  = vcvt_f32_qs8(vget_low_s8(texels_qs8), _fixed_point_position_input);
                         float32x4x2_t texels_high = vcvt_f32_qs8(vget_high_s8(texels_qs8), _fixed_point_position_input);

                         vst1q_f32(reinterpret_cast<float *>(output.ptr()), texels_low.val[0]);
                         vst1q_f32(reinterpret_cast<float *>(output.ptr()) + 4, texels_low.val[1]);
                         vst1q_f32(reinterpret_cast<float *>(output.ptr()) + 8, texels_high.val[0]);
                         vst1q_f32(reinterpret_cast<float *>(output.ptr()) + 12, texels_high.val[1]);
                     },
                     input, output);
                     break;
                 }
                 default:
                     ARM_COMPUTE_ERROR("Output data type not supported");
             }
             break;
         }
         case DataType::S16:
         {
             switch(_output->info()->data_type())
             {
                 case DataType::U8:
                 {
                     const int16x8_t b = vdupq_n_s16(-static_cast<int16_t>(_shift));

                     /* Down-conversion S16 -> U8 */
                     if(ConvertPolicy::SATURATE == _policy)
                     {
                         execute_window_loop(window, [&](const Coordinates & id)
                         {
                             const int16x8x2_t texels =
                             {
                                 {
                                     vqshlq_s16(vld1q_s16(reinterpret_cast<int16_t *>(input.ptr())), b),
                                     vqshlq_s16(vld1q_s16(reinterpret_cast<int16_t *>(input.ptr()) + 8), b)
                                 }
                             };

                             vst1q_u8(output.ptr(), vcombine_u8(vqmovun_s16(texels.val[0]), vqmovun_s16(texels.val[1])));
                         },
                         input, output);
                     }
                     else
                     {
                         execute_window_loop(window, [&](const Coordinates & id)
                         {
                             const int16x8x2_t texels =
                             {
                                 {
                                     vshlq_s16(vld1q_s16(reinterpret_cast<int16_t *>(input.ptr())), b),
                                     vshlq_s16(vld1q_s16(reinterpret_cast<int16_t *>(input.ptr()) + 8), b)
                                 }
                             };

                             vst1q_u8(output.ptr(), vcombine_u8(vmovn_u16(vreinterpretq_u16_s16(texels.val[0])),
                                                                vmovn_u16(vreinterpretq_u16_s16(texels.val[1]))));
                         },
                         input, output);
                     }
                     break;
                 }
                 case DataType::S32:
                 {
                     const int32x4_t b = vdupq_n_s32(_shift);

                     /* Up-conversion S16 -> S32 */
                     execute_window_loop(window, [&](const Coordinates & id)
                     {
                         const int16x8x2_t texels =
                         {
                             {
                                 vld1q_s16(reinterpret_cast<int16_t *>(input.ptr())),
                                 vld1q_s16(reinterpret_cast<int16_t *>(input.ptr()) + 8)
                             }
                         };

                         const int32x4x4_t texels_s32 =
                         {
                             {
                                 vshlq_s32(vmovl_s16(vget_low_s16(texels.val[0])), b),
                                 vshlq_s32(vmovl_s16(vget_high_s16(texels.val[0])), b),
                                 vshlq_s32(vmovl_s16(vget_low_s16(texels.val[1])), b),
                                 vshlq_s32(vmovl_s16(vget_high_s16(texels.val[1])), b)
                             }
                         };

                         vst1q_s32(reinterpret_cast<int32_t *>(output.ptr()), texels_s32.val[0]);
                         vst1q_s32(reinterpret_cast<int32_t *>(output.ptr()) + 4, texels_s32.val[1]);
                         vst1q_s32(reinterpret_cast<int32_t *>(output.ptr()) + 8, texels_s32.val[2]);
                         vst1q_s32(reinterpret_cast<int32_t *>(output.ptr()) + 12, texels_s32.val[3]);
                     },
                     input, output);
                     break;
                 }
                 default:
                     ARM_COMPUTE_ERROR("Output data type not supported");
             }
             break;
         }
         case DataType::U16:
         {
             switch(_output->info()->data_type())
             {
                 case DataType::U8:
                 {
                     const int16x8_t b = vdupq_n_s16(-static_cast<int16_t>(_shift));

                     /* Down-conversion U16 -> U8 */
                     if(ConvertPolicy::SATURATE == _policy)
                     {
                         execute_window_loop(window, [&](const Coordinates & id)
                         {
                             const uint16x8x2_t texels =
                             {
                                 {
                                     vqshlq_u16(vld1q_u16(reinterpret_cast<uint16_t *>(input.ptr())), b),
                                     vqshlq_u16(vld1q_u16(reinterpret_cast<uint16_t *>(input.ptr()) + 8), b)
                                 }
                             };

                             vst1q_u8(output.ptr(), vcombine_u8(vqmovn_u16(texels.val[0]), vqmovn_u16(texels.val[1])));
                         },
                         input, output);
                     }
                     else
                     {
                         execute_window_loop(window, [&](const Coordinates & id)
                         {
                             const uint16x8x2_t texels =
                             {
                                 {
                                     vshlq_u16(vld1q_u16(reinterpret_cast<uint16_t *>(input.ptr())), b),
                                     vshlq_u16(vld1q_u16(reinterpret_cast<uint16_t *>(input.ptr()) + 8), b)
                                 }
                             };

                             vst1q_u8(output.ptr(), vcombine_u8(vmovn_u16(texels.val[0]), vmovn_u16(texels.val[1])));
                         },
                         input, output);
                     }
                     break;
                 }
                 case DataType::U32:
                 {
                     const int32x4_t b = vdupq_n_s32(_shift);

                     /* Up-conversion U16 -> U32 */
                     execute_window_loop(window, [&](const Coordinates & id)
                     {
                         const uint16x8x2_t texels =
                         {
                             {
                                 vld1q_u16(reinterpret_cast<uint16_t *>(input.ptr())),
                                 vld1q_u16(reinterpret_cast<uint16_t *>(input.ptr()) + 8)
                             }
                         };

                         vst1q_u32(reinterpret_cast<uint32_t *>(output.ptr()), vshlq_u32(vmovl_u16(vget_low_u16(texels.val[0])), b));
                         vst1q_u32(reinterpret_cast<uint32_t *>(output.ptr()) + 4, vshlq_u32(vmovl_u16(vget_high_u16(texels.val[0])), b));
                         vst1q_u32(reinterpret_cast<uint32_t *>(output.ptr()) + 8, vshlq_u32(vmovl_u16(vget_low_u16(texels.val[1])), b));
                         vst1q_u32(reinterpret_cast<uint32_t *>(output.ptr()) + 12, vshlq_u32(vmovl_u16(vget_high_u16(texels.val[1])), b));
                     },
                     input, output);
                     break;
                 }
                 default:
                     ARM_COMPUTE_ERROR("Output data type not supported");
             }
             break;
         }
         case DataType::QS16:
         {
             switch(_output->info()->data_type())
             {
                 case DataType::QS16:
                 {
                     const int relative_shift = _fixed_point_position_output - _fixed_point_position_input;
                     /* Fixed point position conversion QS16 -> QS16 */
                     if(relative_shift != 0 || !in_place)
                     {
                         const auto relative_shift_vec = vdupq_n_qs16(relative_shift);
                         execute_window_loop(window, [&](const Coordinates & id)
                         {
                             const qint16x8x2_t texels_qs16 =
                             {
                                 {
                                     vld1q_qs16(reinterpret_cast<qint16_t *>(input.ptr())),
                                     vld1q_qs16(reinterpret_cast<qint16_t *>(input.ptr()) + 8)
                                 }
                             };
                             vst1q_qs16(reinterpret_cast<qint16_t *>(output.ptr()), vqrshlq_s16(texels_qs16.val[0], relative_shift_vec));
                             vst1q_qs16(reinterpret_cast<qint16_t *>(output.ptr()) + 8, vqrshlq_s16(texels_qs16.val[1], relative_shift_vec));
                         },
                         input, output);
                     }
                     break;
                 }
                 case DataType::F32:
                 {
                     /* Up-conversion QS16 -> F32 */
                     execute_window_loop(window, [&](const Coordinates & id)
                     {
                         const int16x8x2_t texels_qs16 =
                         {
                             {
                                 vld1q_s16(reinterpret_cast<qint16_t *>(input.ptr())),
                                 vld1q_s16(reinterpret_cast<qint16_t *>(input.ptr()) + 8)
                             }
                         };

                         vst1q_f32(reinterpret_cast<float *>(output.ptr()), vcvt_f32_qs16(vget_low_s16(texels_qs16.val[0]), _fixed_point_position_input));
                         vst1q_f32(reinterpret_cast<float *>(output.ptr()) + 4, vcvt_f32_qs16(vget_high_s16(texels_qs16.val[0]), _fixed_point_position_input));
                         vst1q_f32(reinterpret_cast<float *>(output.ptr()) + 8, vcvt_f32_qs16(vget_low_s16(texels_qs16.val[1]), _fixed_point_position_input));
                         vst1q_f32(reinterpret_cast<float *>(output.ptr()) + 12, vcvt_f32_qs16(vget_high_s16(texels_qs16.val[1]), _fixed_point_position_input));
                     },
                     input, output);
                     break;
                 }
                 default:
                     ARM_COMPUTE_ERROR("Output data type not supported");
             }
             break;
         }
         case DataType::F32:
         {
             switch(_output->info()->data_type())
             {
                 case DataType::QS8:
                 {
                     /* Down-conversion F32 -> QS8 */
                     execute_window_loop(window, [&](const Coordinates & id)
                     {
                         const float32x4x4_t texels_f32 =
                         {
                             {
                                 vld1q_f32(reinterpret_cast<const float *>(input.ptr())),
                                 vld1q_f32(reinterpret_cast<const float *>(input.ptr()) + 4),
                                 vld1q_f32(reinterpret_cast<const float *>(input.ptr()) + 8),
                                 vld1q_f32(reinterpret_cast<const float *>(input.ptr()) + 12)
                             }
                         };

                         const qint8x16_t texels_s8 = vqcvtq_qs8_f32(texels_f32, _fixed_point_position_output);

                         vst1q_s8(reinterpret_cast<int8_t *>(output.ptr()), texels_s8);
                     },
                     input, output);
                     break;
                 }
                 case DataType::QS16:
                 {
                     /* Down-conversion F32 -> QS16 */
                     execute_window_loop(window, [&](const Coordinates & id)
                     {
                         const float32x4x2_t texels_f32_1 =
                         {
                             {
                                 vld1q_f32(reinterpret_cast<const float *>(input.ptr())),
                                 vld1q_f32(reinterpret_cast<const float *>(input.ptr()) + 4),
                             }
                         };
                         const float32x4x2_t texels_f32_2 =
                         {
                             {
                                 vld1q_f32(reinterpret_cast<const float *>(input.ptr()) + 8),
                                 vld1q_f32(reinterpret_cast<const float *>(input.ptr()) + 12)
                             }
                         };

                         vst1q_s16(reinterpret_cast<qint16_t *>(output.ptr()), vqcvtq_qs16_f32(texels_f32_1, _fixed_point_position_output));
                         vst1q_s16(reinterpret_cast<qint16_t *>(output.ptr()) + 8, vqcvtq_qs16_f32(texels_f32_2, _fixed_point_position_output));
                     },
                     input, output);
                     break;
                 }
                 default:
                     ARM_COMPUTE_ERROR("Output data type not supported");
             }
             break;
         }
         default:
             ARM_COMPUTE_ERROR("Not supported");
     }
 }
	/*
	* 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/NEDepthConvertKernel.h"

	#include "arm_compute/core/Error.h"
	#include "arm_compute/core/Helpers.h"
	#include "arm_compute/core/ITensor.h"
	#include "arm_compute/core/NEON/NEFixedPoint.h"
	#include "arm_compute/core/TensorInfo.h"
	#include "arm_compute/core/Validate.h"

	#include <arm_neon.h>

	using namespace arm_compute;

	namespace arm_compute
	{
	class Coordinates;
	} // namespace arm_compute

	NEDepthConvertKernel::NEDepthConvertKernel()
	: _input(nullptr), _output(nullptr), _policy(), _shift(0), _fixed_point_position_input(0), _fixed_point_position_output(0)
	{
	}

	void NEDepthConvertKernel::configure(ITensor input, ITensor output, ConvertPolicy policy, uint32_t shift)
	{
	ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input, 1, DataType::U8, DataType::QS8, DataType::S16, DataType::U16, DataType::QS16, DataType::F32);

	_input = input;
	_output = input;
	_policy = policy;
	_shift = shift;

	if(output != nullptr)
	{
	// Auto initialize output shape if not initialized (We can only auto-configure the shape, datatype must be given)
	set_shape_if_empty(*output->info(), input->info()->tensor_shape());

	ARM_COMPUTE_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(output, 1, DataType::U8, DataType::QS8, DataType::S16, DataType::U16, DataType::QS16, DataType::U32, DataType::S32, DataType::F32);
	ARM_COMPUTE_ERROR_ON_MISMATCHING_SHAPES(input, output);

	// Set output
	_output = output;
	}

	// Set initial fixed point position of input and output
	_fixed_point_position_input = input->info()->fixed_point_position();
	_fixed_point_position_output = _output->info()->fixed_point_position();

	// Set the fixed point position to the output tensor if needed
	if(is_data_type_fixed_point(input->info()->data_type()) && is_data_type_fixed_point(_output->info()->data_type()))
	{
	// If in-place set the fixed point position of the output tensor to be equal to shift
	_fixed_point_position_output = (_input == _output) ? static_cast<int>(_shift) : _fixed_point_position_output;
	// Set fixed point position to output tensor
	_output->info()->set_fixed_point_position(_fixed_point_position_output);
	}

	ARM_COMPUTE_ERROR_ON(shift >= 8 && (!is_data_type_fixed_point(input->info()->data_type()) && !is_data_type_fixed_point(output->info()->data_type())));
	ARM_COMPUTE_ERROR_ON(input == output && (data_size_from_type(input->info()->data_type()) != data_size_from_type(output->info()->data_type())));

	ARM_COMPUTE_ERROR_ON_MSG(input->info()->data_type() == DataType::U8 && (output->info()->data_type() != DataType::S16 && output->info()->data_type() != DataType::U16
	&& output->info()->data_type() != DataType::S32),
	"Only data_types supported [in] U8 -> [out] U16, S16, S32");

	ARM_COMPUTE_ERROR_ON_MSG(input->info()->data_type() == DataType::QS8 && (output->info()->data_type() != DataType::QS8 && output->info()->data_type() != DataType::F32),
	"Only data_types supported [in] QS8 -> [out] QS8, F32");

	ARM_COMPUTE_ERROR_ON_MSG(input->info()->data_type() == DataType::U16 && (output->info()->data_type() != DataType::U8 && output->info()->data_type() != DataType::U32),
	"Only data_types supported [in] U16 -> [out] U8, U32");

	ARM_COMPUTE_ERROR_ON_MSG(input->info()->data_type() == DataType::S16 && (output->info()->data_type() != DataType::U8 && output->info()->data_type() != DataType::S32),
	"Only data_types supported [in] S16 -> [out] U8, S32");

	ARM_COMPUTE_ERROR_ON_MSG(input->info()->data_type() == DataType::QS16 && (output->info()->data_type() != DataType::QS16 && output->info()->data_type() != DataType::F32),
	"Only data_types supported [in] QS16 -> [out] QS16, F32");

	ARM_COMPUTE_ERROR_ON_MSG(input->info()->data_type() == DataType::F32 && (output->info()->data_type() != DataType::QS8 && output->info()->data_type() != DataType::QS16),
	"Only data_types supported [in] F32 -> [out] QS8, QS16");

	constexpr unsigned int num_elems_processed_per_iteration = 16;

	// Configure kernel window
	Window win = calculate_max_window(*input->info(), Steps(num_elems_processed_per_iteration));

	AccessWindowHorizontal input_access(input->info(), 0, num_elems_processed_per_iteration);
	if(output != nullptr)
	{
	AccessWindowHorizontal output_access(output->info(), 0, num_elems_processed_per_iteration);
	update_window_and_padding(win, input_access, output_access);
	output_access.set_valid_region(win, input->info()->valid_region());
	}
	else
	{
	// In-place computation
	update_window_and_padding(win, input_access);
	}
	ICPPKernel::configure(win);
	}

	void NEDepthConvertKernel::run(const Window &window, const ThreadInfo &info)
	{
	ARM_COMPUTE_UNUSED(info);
	ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
	ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(IKernel::window(), window);
	ARM_COMPUTE_ERROR_ON(nullptr == _input);
	ARM_COMPUTE_ERROR_ON(nullptr == _output);
	ARM_COMPUTE_ERROR_ON(_input == _output);

	Iterator input(_input, window);
	Iterator output(_output, window);

	bool in_place = (_input == _output);

	switch(_input->info()->data_type())
	{
	case DataType::U8:
	{
	const int16x8_t b = vdupq_n_s16(_shift);

	switch(_output->info()->data_type())
	{
	case DataType::S16:
	{
	/* Up-conversion U8 -> S16 */
	execute_window_loop(window, [&](const Coordinates & id)
	{
	const uint8x16_t texels_u8 = vld1q_u8(input.ptr());

	const int16x8x2_t texels =
	{
	{
	vshlq_s16(vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(texels_u8))), b),
	vshlq_s16(vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(texels_u8))), b)
	}
	};

	vst1q_s16(reinterpret_cast<int16_t *>(output.ptr()), texels.val[0]);
	vst1q_s16(reinterpret_cast<int16_t *>(output.ptr()) + 8, texels.val[1]);
	},
	input, output);
	break;
	}
	case DataType::S32:
	{
	/* Up-conversion U8 -> S32 */
	execute_window_loop(window, [&](const Coordinates & id)
	{
	const uint8x16_t texels_u8 = vld1q_u8(input.ptr());

	const int16x8x2_t texels =
	{
	{
	vshlq_s16(vreinterpretq_s16_u16(vmovl_u8(vget_low_u8(texels_u8))), b),
	vshlq_s16(vreinterpretq_s16_u16(vmovl_u8(vget_high_u8(texels_u8))), b)
	}
	};

	vst1q_s32(reinterpret_cast<int32_t *>(output.ptr()), vmovl_s16(vget_low_s16(texels.val[0])));
	vst1q_s32(reinterpret_cast<int32_t *>(output.ptr()) + 4, vmovl_s16(vget_high_s16(texels.val[0])));
	vst1q_s32(reinterpret_cast<int32_t *>(output.ptr()) + 8, vmovl_s16(vget_low_s16(texels.val[1])));
	vst1q_s32(reinterpret_cast<int32_t *>(output.ptr()) + 12, vmovl_s16(vget_high_s16(texels.val[1])));
	},
	input, output);
	break;
	}
	case DataType::U16:
	{
	/* Up-conversion U8 -> U16 */
	execute_window_loop(window, [&](const Coordinates & id)
	{
	const uint8x16_t texels_u8 = vld1q_u8(input.ptr());

	const uint16x8x2_t texels =
	{
	{
	vshlq_u16(vmovl_u8(vget_low_u8(texels_u8)), b),
	vshlq_u16(vmovl_u8(vget_high_u8(texels_u8)), b)
	}
	};

	vst1q_u16(reinterpret_cast<uint16_t *>(output.ptr()), texels.val[0]);
	vst1q_u16(reinterpret_cast<uint16_t *>(output.ptr()) + 8, texels.val[1]);
	},
	input, output);
	break;
	}
	default:
	ARM_COMPUTE_ERROR("Output data type not supported");
	}
	break;
	}
	case DataType::QS8:
	{
	switch(_output->info()->data_type())
	{
	case DataType::QS8:
	{
	const int relative_shift = _fixed_point_position_output - _fixed_point_position_input;
	/* Fixed point position conversion QS8 -> QS8 */
	if(relative_shift != 0 \|\| !in_place)
	{
	const auto relative_shift_vec = vdupq_n_qs8(relative_shift);
	execute_window_loop(window, [&](const Coordinates & id)
	{
	const qint8x16_t texels_qs8 = vld1q_qs8(reinterpret_cast<const qint8_t *>(input.ptr()));
	vst1q_qs8(reinterpret_cast<qint8_t *>(output.ptr()), vqrshlq_s8(texels_qs8, relative_shift_vec));
	},
	input, output);
	}
	break;
	}
	case DataType::F32:
	{
	/* Up-conversion QS8 -> F32 */
	execute_window_loop(window, [&](const Coordinates & id)
	{
	const qint8x16_t texels_qs8 = vld1q_qs8(reinterpret_cast<const qint8_t *>(input.ptr()));

	float32x4x2_t texels_low = vcvt_f32_qs8(vget_low_s8(texels_qs8), _fixed_point_position_input);
	float32x4x2_t texels_high = vcvt_f32_qs8(vget_high_s8(texels_qs8), _fixed_point_position_input);

	vst1q_f32(reinterpret_cast<float *>(output.ptr()), texels_low.val[0]);
	vst1q_f32(reinterpret_cast<float *>(output.ptr()) + 4, texels_low.val[1]);
	vst1q_f32(reinterpret_cast<float *>(output.ptr()) + 8, texels_high.val[0]);
	vst1q_f32(reinterpret_cast<float *>(output.ptr()) + 12, texels_high.val[1]);
	},
	input, output);
	break;
	}
	default:
	ARM_COMPUTE_ERROR("Output data type not supported");
	}
	break;
	}
	case DataType::S16:
	{
	switch(_output->info()->data_type())
	{
	case DataType::U8:
	{
	const int16x8_t b = vdupq_n_s16(-static_cast<int16_t>(_shift));

	/* Down-conversion S16 -> U8 */
	if(ConvertPolicy::SATURATE == _policy)
	{
	execute_window_loop(window, [&](const Coordinates & id)
	{
	const int16x8x2_t texels =
	{
	{
	vqshlq_s16(vld1q_s16(reinterpret_cast<int16_t *>(input.ptr())), b),
	vqshlq_s16(vld1q_s16(reinterpret_cast<int16_t *>(input.ptr()) + 8), b)
	}
	};

	vst1q_u8(output.ptr(), vcombine_u8(vqmovun_s16(texels.val[0]), vqmovun_s16(texels.val[1])));
	},
	input, output);
	}
	else
	{
	execute_window_loop(window, [&](const Coordinates & id)
	{
	const int16x8x2_t texels =
	{
	{
	vshlq_s16(vld1q_s16(reinterpret_cast<int16_t *>(input.ptr())), b),
	vshlq_s16(vld1q_s16(reinterpret_cast<int16_t *>(input.ptr()) + 8), b)
	}
	};

	vst1q_u8(output.ptr(), vcombine_u8(vmovn_u16(vreinterpretq_u16_s16(texels.val[0])),
	vmovn_u16(vreinterpretq_u16_s16(texels.val[1]))));
	},
	input, output);
	}
	break;
	}
	case DataType::S32:
	{
	const int32x4_t b = vdupq_n_s32(_shift);

	/* Up-conversion S16 -> S32 */
	execute_window_loop(window, [&](const Coordinates & id)
	{
	const int16x8x2_t texels =
	{
	{
	vld1q_s16(reinterpret_cast<int16_t *>(input.ptr())),
	vld1q_s16(reinterpret_cast<int16_t *>(input.ptr()) + 8)
	}
	};

	const int32x4x4_t texels_s32 =
	{
	{
	vshlq_s32(vmovl_s16(vget_low_s16(texels.val[0])), b),
	vshlq_s32(vmovl_s16(vget_high_s16(texels.val[0])), b),
	vshlq_s32(vmovl_s16(vget_low_s16(texels.val[1])), b),
	vshlq_s32(vmovl_s16(vget_high_s16(texels.val[1])), b)
	}
	};

	vst1q_s32(reinterpret_cast<int32_t *>(output.ptr()), texels_s32.val[0]);
	vst1q_s32(reinterpret_cast<int32_t *>(output.ptr()) + 4, texels_s32.val[1]);
	vst1q_s32(reinterpret_cast<int32_t *>(output.ptr()) + 8, texels_s32.val[2]);
	vst1q_s32(reinterpret_cast<int32_t *>(output.ptr()) + 12, texels_s32.val[3]);
	},
	input, output);
	break;
	}
	default:
	ARM_COMPUTE_ERROR("Output data type not supported");
	}
	break;
	}
	case DataType::U16:
	{
	switch(_output->info()->data_type())
	{
	case DataType::U8:
	{
	const int16x8_t b = vdupq_n_s16(-static_cast<int16_t>(_shift));

	/* Down-conversion U16 -> U8 */
	if(ConvertPolicy::SATURATE == _policy)
	{
	execute_window_loop(window, [&](const Coordinates & id)
	{
	const uint16x8x2_t texels =
	{
	{
	vqshlq_u16(vld1q_u16(reinterpret_cast<uint16_t *>(input.ptr())), b),
	vqshlq_u16(vld1q_u16(reinterpret_cast<uint16_t *>(input.ptr()) + 8), b)
	}
	};

	vst1q_u8(output.ptr(), vcombine_u8(vqmovn_u16(texels.val[0]), vqmovn_u16(texels.val[1])));
	},
	input, output);
	}
	else
	{
	execute_window_loop(window, [&](const Coordinates & id)
	{
	const uint16x8x2_t texels =
	{
	{
	vshlq_u16(vld1q_u16(reinterpret_cast<uint16_t *>(input.ptr())), b),
	vshlq_u16(vld1q_u16(reinterpret_cast<uint16_t *>(input.ptr()) + 8), b)
	}
	};

	vst1q_u8(output.ptr(), vcombine_u8(vmovn_u16(texels.val[0]), vmovn_u16(texels.val[1])));
	},
	input, output);
	}
	break;
	}
	case DataType::U32:
	{
	const int32x4_t b = vdupq_n_s32(_shift);

	/* Up-conversion U16 -> U32 */
	execute_window_loop(window, [&](const Coordinates & id)
	{
	const uint16x8x2_t texels =
	{
	{
	vld1q_u16(reinterpret_cast<uint16_t *>(input.ptr())),
	vld1q_u16(reinterpret_cast<uint16_t *>(input.ptr()) + 8)
	}
	};

	vst1q_u32(reinterpret_cast<uint32_t *>(output.ptr()), vshlq_u32(vmovl_u16(vget_low_u16(texels.val[0])), b));
	vst1q_u32(reinterpret_cast<uint32_t *>(output.ptr()) + 4, vshlq_u32(vmovl_u16(vget_high_u16(texels.val[0])), b));
	vst1q_u32(reinterpret_cast<uint32_t *>(output.ptr()) + 8, vshlq_u32(vmovl_u16(vget_low_u16(texels.val[1])), b));
	vst1q_u32(reinterpret_cast<uint32_t *>(output.ptr()) + 12, vshlq_u32(vmovl_u16(vget_high_u16(texels.val[1])), b));
	},
	input, output);
	break;
	}
	default:
	ARM_COMPUTE_ERROR("Output data type not supported");
	}
	break;
	}
	case DataType::QS16:
	{
	switch(_output->info()->data_type())
	{
	case DataType::QS16:
	{
	const int relative_shift = _fixed_point_position_output - _fixed_point_position_input;
	/* Fixed point position conversion QS16 -> QS16 */
	if(relative_shift != 0 \|\| !in_place)
	{
	const auto relative_shift_vec = vdupq_n_qs16(relative_shift);
	execute_window_loop(window, [&](const Coordinates & id)
	{
	const qint16x8x2_t texels_qs16 =
	{
	{
	vld1q_qs16(reinterpret_cast<qint16_t *>(input.ptr())),
	vld1q_qs16(reinterpret_cast<qint16_t *>(input.ptr()) + 8)
	}
	};
	vst1q_qs16(reinterpret_cast<qint16_t *>(output.ptr()), vqrshlq_s16(texels_qs16.val[0], relative_shift_vec));
	vst1q_qs16(reinterpret_cast<qint16_t *>(output.ptr()) + 8, vqrshlq_s16(texels_qs16.val[1], relative_shift_vec));
	},
	input, output);
	}
	break;
	}
	case DataType::F32:
	{
	/* Up-conversion QS16 -> F32 */
	execute_window_loop(window, [&](const Coordinates & id)
	{
	const int16x8x2_t texels_qs16 =
	{
	{
	vld1q_s16(reinterpret_cast<qint16_t *>(input.ptr())),
	vld1q_s16(reinterpret_cast<qint16_t *>(input.ptr()) + 8)
	}
	};

	vst1q_f32(reinterpret_cast<float *>(output.ptr()), vcvt_f32_qs16(vget_low_s16(texels_qs16.val[0]), _fixed_point_position_input));
	vst1q_f32(reinterpret_cast<float *>(output.ptr()) + 4, vcvt_f32_qs16(vget_high_s16(texels_qs16.val[0]), _fixed_point_position_input));
	vst1q_f32(reinterpret_cast<float *>(output.ptr()) + 8, vcvt_f32_qs16(vget_low_s16(texels_qs16.val[1]), _fixed_point_position_input));
	vst1q_f32(reinterpret_cast<float *>(output.ptr()) + 12, vcvt_f32_qs16(vget_high_s16(texels_qs16.val[1]), _fixed_point_position_input));
	},
	input, output);
	break;
	}
	default:
	ARM_COMPUTE_ERROR("Output data type not supported");
	}
	break;
	}
	case DataType::F32:
	{
	switch(_output->info()->data_type())
	{
	case DataType::QS8:
	{
	/* Down-conversion F32 -> QS8 */
	execute_window_loop(window, [&](const Coordinates & id)
	{
	const float32x4x4_t texels_f32 =
	{
	{
	vld1q_f32(reinterpret_cast<const float *>(input.ptr())),
	vld1q_f32(reinterpret_cast<const float *>(input.ptr()) + 4),
	vld1q_f32(reinterpret_cast<const float *>(input.ptr()) + 8),
	vld1q_f32(reinterpret_cast<const float *>(input.ptr()) + 12)
	}
	};

	const qint8x16_t texels_s8 = vqcvtq_qs8_f32(texels_f32, _fixed_point_position_output);

	vst1q_s8(reinterpret_cast<int8_t *>(output.ptr()), texels_s8);
	},
	input, output);
	break;
	}
	case DataType::QS16:
	{
	/* Down-conversion F32 -> QS16 */
	execute_window_loop(window, [&](const Coordinates & id)
	{
	const float32x4x2_t texels_f32_1 =
	{
	{
	vld1q_f32(reinterpret_cast<const float *>(input.ptr())),
	vld1q_f32(reinterpret_cast<const float *>(input.ptr()) + 4),
	}
	};
	const float32x4x2_t texels_f32_2 =
	{
	{
	vld1q_f32(reinterpret_cast<const float *>(input.ptr()) + 8),
	vld1q_f32(reinterpret_cast<const float *>(input.ptr()) + 12)
	}
	};

	vst1q_s16(reinterpret_cast<qint16_t *>(output.ptr()), vqcvtq_qs16_f32(texels_f32_1, _fixed_point_position_output));
	vst1q_s16(reinterpret_cast<qint16_t *>(output.ptr()) + 8, vqcvtq_qs16_f32(texels_f32_2, _fixed_point_position_output));
	},
	input, output);
	break;
	}
	default:
	ARM_COMPUTE_ERROR("Output data type not supported");
	}
	break;
	}
	default:
	ARM_COMPUTE_ERROR("Not supported");
	}
	}