COMPMID-903: Implements NEPermute for NHWC conversions

Change-Id: I4083e8d16bb23933634f229a1408dfd0e8f2922a
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/120069
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>

1 files changed, 215 insertions, 0 deletions

diff --git a/src/core/NEON/kernels/NEPermuteKernel.cpp b/src/core/NEON/kernels/NEPermuteKernel.cpp
new file mode 100644
index 0000000000..f5f276f1cc
--- /dev/null
+++ b/src/core/NEON/kernels/NEPermuteKernel.cpp
@@ -0,0 +1,215 @@
+/*
+ * Copyright (c) 2018 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/NEPermuteKernel.h"
+
+#include "arm_compute/core/Error.h"
+#include "arm_compute/core/Helpers.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_compute/core/utils/misc/ShapeCalculator.h"
+
+namespace
+{
+#include "arm_compute/core/NEON/kernels/convolution/common/shims.hpp"
+} // namespace
+
+#include <cstddef>
+#include <cstdint>
+
+using namespace arm_compute;
+
+namespace
+{
+Status validate_arguments(const ITensorInfo *input, const ITensorInfo *output, const PermutationVector &perm)
+{
+    ARM_COMPUTE_RETURN_ERROR_ON_DATA_TYPE_CHANNEL_NOT_IN(input, 1, DataType::U8, DataType::S8, DataType::QS8, DataType::QASYMM8,
+                                                         DataType::U16, DataType::S16, DataType::QS16,
+                                                         DataType::U32, DataType::S32,
+                                                         DataType::F16, DataType::F32);
+    ARM_COMPUTE_RETURN_ERROR_ON_MSG(input->num_dimensions() < 3, "Invalid input size!");
+    ARM_COMPUTE_RETURN_ERROR_ON_MSG(
+        (perm.num_dimensions() != 3 && ((perm[0] != 2 && perm[1] != 0 && perm[2] != 1) || (perm[0] != 1 && perm[1] != 2 && perm[2] != 0))),
+        "Only [2, 0, 1] and [1, 2, 0] permutation is supported");
+
+    const TensorShape output_shape = misc::shape_calculator::compute_permutation_output_shape(*input, perm);
+
+    // Validate configured output
+    if(output->total_size() != 0)
+    {
+        ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DIMENSIONS(output->tensor_shape(), output_shape);
+        ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(input, output);
+        ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_FIXED_POINT(input, output);
+    }
+
+    return Status{};
+}
+} // namespace
+
+template <typename T>
+void NEPermuteKernel::run_permute(const Window &window)
+{
+    // Input window
+    Window window_in = window;
+    window_in.set(Window::DimX, Window::Dimension(window.x().start(), window.x().end(), window.x().end() - window.x().start()));
+    window_in.set(Window::DimY, Window::Dimension(window.y().start(), window.y().end(), window.y().end() - window.y().start()));
+    window_in.set(Window::DimZ, Window::Dimension(window.z().start(), window.z().end(), window.z().end() - window.z().start()));
+    window_in.set(3, Window::Dimension(window[3].start(), window[3].end(), window[3].end() - window[3].start()));
+
+    // Output window
+    Window                  window_out(window);
+    const Window::Dimension zero_window = Window::Dimension(0, 0, 0);
+    for(size_t d = 0; d <= _perm.num_dimensions(); ++d)
+    {
+        window_out.set(d, zero_window);
+    }
+
+    // Create iterators
+    Iterator in(_input, window_in);
+    Iterator out(_output, window_out);
+
+    // CHW -> HWC
+    if((_perm.num_dimensions() == 3) && (_perm[0] == 2) && (_perm[1] == 0) && (_perm[2] == 1))
+    {
+        const int in_row_stride     = _input->info()->strides_in_bytes().y() / sizeof(T);
+        const int in_channel_stride = _input->info()->strides_in_bytes().z() / sizeof(T);
+        const int in_batch_stride   = _input->info()->strides_in_bytes()[3] / sizeof(T);
+
+        const int out_channel_stride = _output->info()->strides_in_bytes().x() / sizeof(T);
+        const int out_col_stride     = _output->info()->strides_in_bytes().y() / sizeof(T);
+        const int out_row_stride     = _output->info()->strides_in_bytes().z() / sizeof(T);
+        const int out_batch_stride   = _output->info()->strides_in_bytes()[3] / sizeof(T);
+
+        const int n_cols     = _input->info()->tensor_shape().x();
+        const int n_rows     = window_in.y().step();
+        const int n_channels = _input->info()->tensor_shape().z();
+        const int n_batches  = _input->info()->tensor_shape()[3];
+
+        execute_window_loop(window_in, [&](const Coordinates & id)
+        {
+            const int idx = id[0] * out_col_stride + id[1] * out_row_stride + id[2] * out_channel_stride;
+            reorder::nchw_to_nhwc(reinterpret_cast<const T *>(in.ptr()), reinterpret_cast<T *>(out.ptr()) + idx,
+                                  n_batches, n_channels, n_rows, n_cols,
+                                  in_batch_stride, in_channel_stride, in_row_stride,
+                                  out_batch_stride, out_row_stride, out_col_stride);
+        },
+        in, out);
+    }
+    // HWC -> CHW
+    else if((_perm.num_dimensions() == 3) && (_perm[0] == 1) && (_perm[1] == 2) && (_perm[2] == 0))
+    {
+        const int in_col_stride   = _input->info()->strides_in_bytes().y() / sizeof(T);
+        const int in_row_stride   = _input->info()->strides_in_bytes().z() / sizeof(T);
+        const int in_batch_stride = _input->info()->strides_in_bytes()[3] / sizeof(T);
+
+        const int out_col_stride     = _output->info()->strides_in_bytes().x() / sizeof(T);
+        const int out_row_stride     = _output->info()->strides_in_bytes().y() / sizeof(T);
+        const int out_channel_stride = _output->info()->strides_in_bytes().z() / sizeof(T);
+        const int out_batch_stride   = _output->info()->strides_in_bytes()[3] / sizeof(T);
+
+        const int n_channels = _input->info()->tensor_shape().x();
+        const int n_cols     = window_in.y().step();
+        const int n_rows     = _input->info()->tensor_shape().z();
+        const int n_batches  = _input->info()->tensor_shape()[3];
+
+        execute_window_loop(window_in, [&](const Coordinates & id)
+        {
+            const int idx = id[0] * out_channel_stride + id[1] * out_col_stride + id[2] * out_row_stride;
+            reorder::nhwc_to_nchw(reinterpret_cast<const T *>(in.ptr()), reinterpret_cast<T *>(out.ptr()) + idx,
+                                  n_batches, n_rows, n_cols, n_channels,
+                                  in_batch_stride, in_row_stride, in_col_stride,
+                                  out_batch_stride, out_channel_stride, out_row_stride);
+        },
+        in, out);
+    }
+    else
+    {
+        ARM_COMPUTE_ERROR("Unsupported permutation vector");
+    }
+}
+
+NEPermuteKernel::NEPermuteKernel()
+    : _func(), _input(nullptr), _output(nullptr), _perm()
+{
+}
+
+void NEPermuteKernel::configure(const ITensor *input, ITensor *output, const PermutationVector &perm)
+{
+    ARM_COMPUTE_ERROR_ON_NULLPTR(input, output);
+    const TensorShape output_shape = misc::shape_calculator::compute_permutation_output_shape(*input->info(), perm);
+    // Output auto inizialitation if not yet initialized
+    auto_init_if_empty(*output->info(), input->info()->clone()->set_tensor_shape(output_shape));
+
+    // Perform validation step
+    ARM_COMPUTE_ERROR_THROW_ON(validate_arguments(input->info(), output->info(), perm));
+
+    _input  = input;
+    _output = output;
+    _perm   = perm;
+
+    switch(input->info()->element_size())
+    {
+        case 1:
+            _func = &NEPermuteKernel::run_permute<uint8_t>;
+            break;
+        case 2:
+            _func = &NEPermuteKernel::run_permute<uint16_t>;
+            break;
+        case 4:
+            _func = &NEPermuteKernel::run_permute<uint32_t>;
+            break;
+        default:
+            ARM_COMPUTE_ERROR("Element size not supported");
+            break;
+    }
+
+    // Configure kernel window
+    Window win = calculate_max_window(*input->info(), Steps());
+
+    // The NEPermute doesn't need padding so update_window_and_padding() can be skipped
+    Coordinates coord;
+    coord.set_num_dimensions(output->info()->num_dimensions());
+    output->info()->set_valid_region(ValidRegion(coord, output->info()->tensor_shape()));
+
+    ICPPKernel::configure(win);
+}
+
+Status NEPermuteKernel::validate(const ITensorInfo *input, const ITensorInfo *output, const PermutationVector &perm)
+{
+    ARM_COMPUTE_RETURN_ON_ERROR(validate_arguments(input, output, perm));
+    return Status{};
+}
+
+void NEPermuteKernel::run(const Window &window, const ThreadInfo &info)
+{
+    ARM_COMPUTE_UNUSED(info);
+    ARM_COMPUTE_ERROR_ON_UNCONFIGURED_KERNEL(this);
+    ARM_COMPUTE_ERROR_ON_INVALID_SUBWINDOW(ICPPKernel::window(), window);
+
+    if(_func != nullptr)
+    {
+        (this->*_func)(window);
+    }
+}