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+/*
+ * Copyright (c) 2017-2023 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 "src/cpu/kernels/CpuPool2dKernel.h"
+
+#include "arm_compute/core/Helpers.h"
+#include "arm_compute/core/TensorInfo.h"
+#include "arm_compute/core/utils/misc/ShapeCalculator.h"
+#include "arm_compute/core/Validate.h"
+#include "arm_compute/core/Window.h"
+
+#include "src/core/common/Registrars.h"
+#include "src/core/CPP/Validate.h"
+#include "src/core/helpers/AutoConfiguration.h"
+#include "src/core/helpers/WindowHelpers.h"
+#include "src/core/NEON/wrapper/wrapper.h"
+#include "src/cpu/kernels/pool2d/neon/list.h"
+
+#include <arm_neon.h>
+
+namespace arm_compute
+{
+namespace cpu
+{
+namespace kernels
+{
+namespace
+{
+using namespace misc::shape_calculator;
+
+static const std::vector<CpuPool2dKernel::PoolingKernel> available_kernels = {
+ {"neon_qu8_nhwc_poolMxN",
+ [](const PoolDataTypeISASelectorData &data)
+ { return ((data.dl == DataLayout::NHWC) && (data.dt == DataType::QASYMM8)); },
+ REGISTER_QASYMM8_NEON(arm_compute::cpu::poolingMxN_qasymm8_neon_nhwc)},
+ {"neon_qs8_nhwc_poolMxN",
+ [](const PoolDataTypeISASelectorData &data)
+ { return ((data.dl == DataLayout::NHWC) && (data.dt == DataType::QASYMM8_SIGNED)); },
+ REGISTER_QASYMM8_SIGNED_NEON(arm_compute::cpu::poolingMxN_qasymm8_signed_neon_nhwc)},
+ {"neon_f16_nhwc_poolMxN",
+ [](const PoolDataTypeISASelectorData &data)
+ { return ((data.dl == DataLayout::NHWC) && (data.dt == DataType::F16)) && data.isa.fp16; },
+ REGISTER_FP16_NEON(arm_compute::cpu::poolingMxN_fp16_neon_nhwc)},
+ {"neon_fp32_nhwc_poolMxN",
+ [](const PoolDataTypeISASelectorData &data)
+ { return ((data.dl == DataLayout::NHWC) && (data.dt == DataType::F32)); },
+ REGISTER_FP32_NEON(arm_compute::cpu::poolingMxN_fp32_neon_nhwc)},
+#if defined(ENABLE_NCHW_KERNELS)
+ {"neon_qu8_nchw_pool2",
+ [](const PoolDataTypeISASelectorData &data)
+ {
+ return ((data.dl == DataLayout::NCHW) && (data.dt == DataType::QASYMM8) &&
+ (data.pool_size.x() == data.pool_size.y()) && (data.pool_size.x() == 2) && (data.pool_stride_x < 3));
+ },
+ REGISTER_QASYMM8_NEON(arm_compute::cpu::pooling2_quantized_neon_nchw<uint8_t>)},
+ {"neon_qu8_nchw_pool3",
+ [](const PoolDataTypeISASelectorData &data)
+ {
+ return ((data.dl == DataLayout::NCHW) && (data.dt == DataType::QASYMM8) &&
+ (data.pool_size.x() == data.pool_size.y()) && (data.pool_size.x() == 3) && (data.pool_stride_x < 3));
+ },
+ REGISTER_QASYMM8_NEON(arm_compute::cpu::pooling3_quantized_neon_nchw<uint8_t>)},
+ {"neon_qu8_nchw_poolMxN",
+ [](const PoolDataTypeISASelectorData &data)
+ { return ((data.dl == DataLayout::NCHW) && (data.dt == DataType::QASYMM8)); },
+ REGISTER_QASYMM8_NEON(arm_compute::cpu::poolingMxN_quantized_neon_nchw<uint8_t>)},
+ {"neon_qs8_nchw_pool2",
+ [](const PoolDataTypeISASelectorData &data)
+ {
+ return ((data.dl == DataLayout::NCHW) && (data.dt == DataType::QASYMM8_SIGNED) &&
+ (data.pool_size.x() == data.pool_size.y()) && (data.pool_size.x() == 2) && (data.pool_stride_x < 3));
+ },
+ REGISTER_QASYMM8_SIGNED_NEON(arm_compute::cpu::pooling2_quantized_neon_nchw<int8_t>)},
+ {"neon_qs8_nchw_pool3",
+ [](const PoolDataTypeISASelectorData &data)
+ {
+ return ((data.dl == DataLayout::NCHW) && (data.dt == DataType::QASYMM8_SIGNED) &&
+ (data.pool_size.x() == data.pool_size.y()) && (data.pool_size.x() == 3) && (data.pool_stride_x < 3));
+ },
+ REGISTER_QASYMM8_SIGNED_NEON(arm_compute::cpu::pooling3_quantized_neon_nchw<int8_t>)},
+ {"neon_qs8_nchw_poolMxN",
+ [](const PoolDataTypeISASelectorData &data)
+ { return ((data.dl == DataLayout::NCHW) && (data.dt == DataType::QASYMM8_SIGNED)); },
+ REGISTER_QASYMM8_SIGNED_NEON(arm_compute::cpu::poolingMxN_quantized_neon_nchw<int8_t>)},
+ {"neon_fp16_nchw_pool2",
+ [](const PoolDataTypeISASelectorData &data)
+ {
+ return ((data.dl == DataLayout::NCHW) && (data.dt == DataType::F16 && data.isa.fp16) &&
+ (data.pool_size.x() == data.pool_size.y()) && (data.pool_size.x() == 2));
+ },
+ REGISTER_FP16_NEON(arm_compute::cpu::pooling2_fp16_neon_nchw)},
+ {"neon_fp16_nchw_pool3",
+ [](const PoolDataTypeISASelectorData &data)
+ {
+ return ((data.dl == DataLayout::NCHW) && (data.dt == DataType::F16 && data.isa.fp16) &&
+ (data.pool_size.x() == data.pool_size.y()) && (data.pool_size.x() == 3));
+ },
+ REGISTER_FP16_NEON(arm_compute::cpu::pooling3_fp16_neon_nchw)},
+ {"neon_fp16_nchw_poolMxN",
+ [](const PoolDataTypeISASelectorData &data)
+ { return ((data.dl == DataLayout::NCHW) && (data.dt == DataType::F16 && data.isa.fp16)); },
+ REGISTER_FP16_NEON(arm_compute::cpu::poolingMxN_fp16_neon_nchw)},
+ {"neon_fp32_nchw_pool2",
+ [](const PoolDataTypeISASelectorData &data)
+ {
+ return ((data.dl == DataLayout::NCHW) && (data.dt == DataType::F32) &&
+ (data.pool_size.x() == data.pool_size.y()) && (data.pool_size.x() == 2));
+ },
+ REGISTER_FP32_NEON(arm_compute::cpu::pooling2_fp32_neon_nchw)},
+ {"neon_fp32_nchw_pool3",
+ [](const PoolDataTypeISASelectorData &data)
+ {
+ return ((data.dl == DataLayout::NCHW) && (data.dt == DataType::F32) &&
+ (data.pool_size.x() == data.pool_size.y()) && (data.pool_size.x() == 3));
+ },
+ REGISTER_FP32_NEON(arm_compute::cpu::pooling3_fp32_neon_nchw)},
+ {"neon_fp32_nchw_pool7",
+ [](const PoolDataTypeISASelectorData &data)
+ {
+ return ((data.dl == DataLayout::NCHW) && (data.dt == DataType::F32) &&
+ (data.pool_size.x() == data.pool_size.y()) && (data.pool_size.x() == 7));
+ },
+ REGISTER_FP32_NEON(arm_compute::cpu::pooling7_fp32_neon_nchw)},
+ {"neon_fp32_nchw_poolMxN",
+ [](const PoolDataTypeISASelectorData &data)
+ { return ((data.dl == DataLayout::NCHW) && (data.dt == DataType::F32)); },
+ REGISTER_FP32_NEON(arm_compute::cpu::poolingMxN_fp32_neon_nchw)},
+#endif /* defined(ENABLE_NCHW_KERNELS) */
+};
+
+Status validate_arguments(const ITensorInfo *src,
+ const ITensorInfo *dst,
+ const PoolingLayerInfo &pool_info,
+ const ITensorInfo *indices,
+ Size2D pool_size)
+{
+ ARM_COMPUTE_RETURN_ERROR_ON_NULLPTR(src, dst);
+ ARM_COMPUTE_RETURN_ERROR_ON(pool_size.x() == 0);
+ ARM_COMPUTE_RETURN_ERROR_ON(pool_size.y() == 0);
+
+ int pool_stride_x = 0;
+ int pool_stride_y = 0;
+ int output_width = 0;
+ int output_height = 0;
+ PoolingType pool_type = pool_info.pool_type;
+ const PadStrideInfo pad_stride_info = pool_info.pad_stride_info;
+ const auto data_layout = pool_info.data_layout == DataLayout::UNKNOWN ? src->data_layout() : pool_info.data_layout;
+ const int idx_width = get_data_layout_dimension_index(data_layout, DataLayoutDimension::WIDTH);
+ const int idx_height = get_data_layout_dimension_index(data_layout, DataLayoutDimension::HEIGHT);
+
+ ARM_COMPUTE_RETURN_ERROR_ON_MSG(
+ (!is_data_type_float(src->data_type())) && (is_pool_region_entirely_outside_input(pool_info)),
+ "Pooling region that is entirely outside input tensor is unsupported for non-float types");
+
+ std::tie(output_width, output_height) =
+ scaled_dimensions_signed(src->tensor_shape()[idx_width], src->tensor_shape()[idx_height], pool_size.x(),
+ pool_size.y(), pool_info.pad_stride_info);
+ ARM_COMPUTE_RETURN_ERROR_ON_MSG((output_width < 1 || output_height < 1),
+ "Calculated output dimension size is invalid");
+
+ TensorInfo out_info(TensorInfo(compute_pool_shape(*src, pool_info), 1, dst->data_type()));
+ std::tie(pool_stride_x, pool_stride_y) = pad_stride_info.stride();
+
+ ARM_COMPUTE_RETURN_ERROR_ON_CPU_F16_UNSUPPORTED(src);
+ if (indices)
+ {
+ ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(src, 1, DataType::F32, DataType::F16);
+ ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(indices, 1, DataType::U32);
+ ARM_COMPUTE_RETURN_ERROR_ON_MSG(pool_type != PoolingType::MAX,
+ "Pooling indices only supported for MAX pooling method");
+ }
+ ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(src, 1, DataType::QASYMM8, DataType::QASYMM8_SIGNED,
+ DataType::F16, DataType::F32);
+ ARM_COMPUTE_RETURN_ERROR_ON(pool_type == PoolingType::L2 && is_data_type_quantized(src->data_type()));
+ ARM_COMPUTE_RETURN_ERROR_ON_MSG(
+ is_data_type_quantized(src->data_type()) && !pool_info.exclude_padding &&
+ (pool_info.pool_type == PoolingType::AVG) && pool_info.pad_stride_info.has_padding() &&
+ (src->data_layout() == DataLayout::NHWC),
+ "exclude_padding equal false is not supported for AVG Pooling with padding on quantized types");
+
+ if (dst->total_size() != 0)
+ {
+ ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(src, dst);
+ ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_LAYOUT(src, dst);
+ ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_SHAPES(dst, &out_info);
+ if (indices)
+ {
+ ARM_COMPUTE_RETURN_ERROR_ON_MSG(
+ ((pool_size != Size2D(2, 2)) && !pool_info.use_kernel_indices),
+ "Pooling indices returning source tensor coordinates is only supported for pool size 2x2");
+ ARM_COMPUTE_RETURN_ERROR_ON_MSG(pool_info.use_kernel_indices && (src->data_layout() != DataLayout::NHWC),
+ "Pooling kernel indices only supported for NHWC");
+ ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_SHAPES(indices, &out_info);
+ }
+ }
+
+ const auto *uk = CpuPool2dKernel::get_implementation(PoolDataTypeISASelectorData{
+ src->data_type(), src->data_layout(), pool_stride_x, pool_size, CPUInfo::get().get_isa()});
+ ARM_COMPUTE_RETURN_ERROR_ON(uk == nullptr || uk->ukernel == nullptr);
+
+ return Status{};
+}
+
+std::pair<Status, Window> validate_and_configure_window(ITensorInfo *src,
+ ITensorInfo *dst,
+ ITensorInfo *indices,
+ const PoolingLayerInfo &pool_info,
+ unsigned int &num_elems_processed_per_iteration,
+ int pool_size_x,
+ int pool_size_y)
+{
+ // dst auto inizialitation if not yet initialized
+ auto_init_if_empty(*dst, src->clone()->set_tensor_shape(compute_pool_shape(*src, pool_info)));
+ if (indices)
+ {
+ // Indices auto inizialitation if not yet initialized
+ auto_init_if_empty(*indices, (src->clone()->set_tensor_shape(compute_pool_shape(*src, pool_info)))
+ .set_data_type(DataType::U32) /* we store the offset to the element */);
+ }
+ const auto data_layout = pool_info.data_layout == DataLayout::UNKNOWN ? src->data_layout() : pool_info.data_layout;
+
+ int pool_stride_x = 0;
+ int pool_stride_y = 0;
+ const int idx_width = get_data_layout_dimension_index(data_layout, DataLayoutDimension::WIDTH);
+ const int idx_height = get_data_layout_dimension_index(data_layout, DataLayoutDimension::HEIGHT);
+ const PadStrideInfo pad_stride_info = pool_info.pad_stride_info;
+
+ std::tie(pool_stride_x, pool_stride_y) = pad_stride_info.stride();
+ const bool is_square = pool_size_x == pool_size_y;
+ const unsigned int pooled_w = dst->dimension(idx_width);
+ const unsigned int pooled_h = dst->dimension(idx_height);
+
+ //If it's not squared and optimized will be executed the MxN
+ num_elems_processed_per_iteration = 1;
+
+ if (is_square)
+ {
+ switch (src->data_type())
+ {
+ case DataType::QASYMM8:
+ case DataType::QASYMM8_SIGNED:
+ switch (pool_size_x)
+ {
+ case 2:
+ num_elems_processed_per_iteration = (pool_stride_x == 2) ? 8 : 15;
+ break;
+ case 3:
+ num_elems_processed_per_iteration = (pool_stride_x == 2) ? 7 : 14;
+ break;
+ default:
+ break;
+ }
+ break;
+ case DataType::F16:
+ num_elems_processed_per_iteration = 1;
+ break;
+ case DataType::F32:
+ num_elems_processed_per_iteration = 1;
+ break;
+ default:
+ ARM_COMPUTE_ERROR("Element size not supported");
+ break;
+ }
+ }
+
+ bool window_changed = false;
+ Window win{};
+ // Upper limit for the number of right/bottom border elements that are accessed
+ TensorShape dst_shape{src->tensor_shape()};
+ dst_shape.set(0, pooled_w);
+ dst_shape.set(1, pooled_h);
+ TensorInfo dst_info(src->clone()->set_tensor_shape(dst_shape));
+ win = calculate_max_window(dst_info, Steps(num_elems_processed_per_iteration));
+
+ Status err =
+ (window_changed) ? ARM_COMPUTE_CREATE_ERROR(ErrorCode::RUNTIME_ERROR, "Insufficient Padding!") : Status{};
+ return std::make_pair(err, win);
+}
+} // namespace
+
+void CpuPool2dKernel::configure(ITensorInfo *src,
+ ITensorInfo *dst,
+ const PoolingLayerInfo &pool_info,
+ ITensorInfo *indices)
+{
+ ARM_COMPUTE_ERROR_ON_NULLPTR(src, dst);
+ const PadStrideInfo pad_stride_info = pool_info.pad_stride_info;
+ const bool is_global_pooling = pool_info.is_global_pooling;
+
+ // Get data layout
+ const auto data_layout = pool_info.data_layout == DataLayout::UNKNOWN ? src->data_layout() : pool_info.data_layout;
+ const int idx_width = get_data_layout_dimension_index(data_layout, DataLayoutDimension::WIDTH);
+ const int idx_height = get_data_layout_dimension_index(data_layout, DataLayoutDimension::HEIGHT);
+
+ // Update pool size in case of global pooling
+ const Size2D pool_size(is_global_pooling ? src->dimension(idx_width) : pool_info.pool_size.width,
+ is_global_pooling ? src->dimension(idx_height) : pool_info.pool_size.height);
+
+ // Perform validation step
+ ARM_COMPUTE_ERROR_THROW_ON(validate_arguments(src, dst, pool_info, indices, pool_size));
+
+ const auto *uk = CpuPool2dKernel::get_implementation(
+ PoolDataTypeISASelectorData{src->data_type(), src->data_layout(), (int)pad_stride_info.stride().first,
+ pool_size, CPUInfo::get().get_isa()});
+ ARM_COMPUTE_ERROR_ON(uk == nullptr);
+
+ // Set instance variables
+ _pool_info = pool_info;
+ _data_layout = src->data_layout();
+ _pool_size = pool_size;
+ _pool_stride_x = pad_stride_info.stride().first;
+ _run_method = uk->ukernel;
+ _name = std::string("CpuPool2dKernel").append("/").append(uk->name);
+
+ if (_data_layout == DataLayout::NHWC)
+ {
+ // Configure kernel window
+ Window win = calculate_max_window(*dst, Steps());
+ ICpuKernel::configure(win);
+ }
+ else
+ {
+ // Configure kernel window
+ auto win_config = validate_and_configure_window(
+ src, dst, indices, pool_info, _num_elems_processed_per_iteration, pool_size.x(), pool_size.y());
+ ARM_COMPUTE_ERROR_THROW_ON(win_config.first);
+ ICpuKernel::configure(win_config.second);
+ }
+}
+
+Status CpuPool2dKernel::validate(const ITensorInfo *src,
+ const ITensorInfo *dst,
+ const PoolingLayerInfo &pool_info,
+ const ITensorInfo *indices)
+{
+ ARM_COMPUTE_RETURN_ERROR_ON_NULLPTR(src);
+
+ unsigned int num_elems_processed_per_iteration = 0;
+
+ const bool is_global_pooling = pool_info.is_global_pooling;
+
+ // Get data layout
+ const auto data_layout = pool_info.data_layout == DataLayout::UNKNOWN ? src->data_layout() : pool_info.data_layout;
+ const int idx_width = get_data_layout_dimension_index(data_layout, DataLayoutDimension::WIDTH);
+ const int idx_height = get_data_layout_dimension_index(data_layout, DataLayoutDimension::HEIGHT);
+
+ unsigned int pool_size_x = is_global_pooling ? src->dimension(idx_width) : pool_info.pool_size.width;
+ unsigned int pool_size_y = is_global_pooling ? src->dimension(idx_height) : pool_info.pool_size.height;
+
+ ARM_COMPUTE_RETURN_ON_ERROR(validate_arguments(src, dst, pool_info, indices, Size2D(pool_size_x, pool_size_y)));
+ ARM_COMPUTE_RETURN_ON_ERROR(validate_and_configure_window(src->clone().get(), dst->clone().get(),
+ (indices) ? indices->clone().get() : nullptr, pool_info,
+ num_elems_processed_per_iteration, pool_size_x,
+ pool_size_y)
+ .first);
+
+ return Status{};
+}
+
+void CpuPool2dKernel::run_op(ITensorPack &tensors, const Window &window, const ThreadInfo &info)
+{
+ ARM_COMPUTE_UNUSED(info);
+ ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
+ ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(ICpuKernel::window(), window);
+ ARM_COMPUTE_ERROR_ON(_run_method == nullptr);
+
+ const ITensor *src = tensors.get_const_tensor(TensorType::ACL_SRC_0);
+ ITensor *dst = tensors.get_tensor(TensorType::ACL_DST_0);
+ ITensor *indices = tensors.get_tensor(TensorType::ACL_DST_1);
+
+ const unsigned int pool_stride_x = _pool_info.pad_stride_info.stride().first;
+ const unsigned int pool_stride_y = _pool_info.pad_stride_info.stride().second;
+ const unsigned int pool_size = _pool_info.pool_size.width;
+
+ Window window_src(window);
+ if (_data_layout == DataLayout::NCHW)
+ {
+ // Set step for src in x and y direction for the src
+ unsigned int window_x_inc = 0;
+ switch (src->info()->data_type())
+ {
+ case DataType::QASYMM8:
+ case DataType::QASYMM8_SIGNED:
+ {
+ window_x_inc = pool_stride_x;
+ if ((pool_size == 2 || pool_size == 3) && pool_stride_x < 3)
+ {
+ window_x_inc = (pool_stride_x == 2) ? _num_elems_processed_per_iteration * 2
+ : _num_elems_processed_per_iteration;
+ }
+ break;
+ }
+
+ case DataType::F16:
+ case DataType::F32:
+ {
+ window_x_inc = pool_stride_x;
+ break;
+ }
+ default:
+ {
+ ARM_COMPUTE_ERROR("Not supported");
+ }
+ }
+ window_src.set(Window::DimX, Window::Dimension(window.x().start() * pool_stride_x,
+ window.x().end() * pool_stride_x, window_x_inc));
+ window_src.set(Window::DimY, Window::Dimension(window.y().start() * pool_stride_y,
+ window.y().end() * pool_stride_y, pool_stride_y));
+ }
+ else
+ {
+ window_src.set(Window::DimX, Window::Dimension(0, 1, 1));
+ window_src.set(Window::DimY, Window::Dimension(0, src->info()->dimension(1), pool_stride_x));
+ window_src.set(Window::DimZ, Window::Dimension(0, src->info()->dimension(2), pool_stride_y));
+ }
+ _run_method(src, dst, indices, _pool_info, window_src, window);
+}
+
+const char *CpuPool2dKernel::name() const
+{
+ return _name.c_str();
+}
+
+const std::vector<CpuPool2dKernel::PoolingKernel> &CpuPool2dKernel::get_available_kernels()
+{
+ return available_kernels;
+}
+
+} // namespace kernels
+} // namespace cpu
+} // namespace arm_compute