1 files changed, 141 insertions, 0 deletions
diff --git a/src/core/cpu/kernels/CpuReshapeKernel.cpp b/src/core/cpu/kernels/CpuReshapeKernel.cpp
new file mode 100644
index 0000000000..068f5d025b
--- /dev/null
+++ b/src/core/cpu/kernels/CpuReshapeKernel.cpp
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2017-2021 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/core/cpu/kernels/CpuReshapeKernel.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 "src/core/AccessWindowStatic.h"
+#include "src/core/CPP/Validate.h"
+#include "src/core/NEON/INEKernel.h"
+#include "src/core/helpers/AutoConfiguration.h"
+#include "src/core/helpers/WindowHelpers.h"
+
+#include <cstdint>
+
+/** [NEReshapeLayerKernel Kernel] **/
+namespace arm_compute
+{
+namespace cpu
+{
+namespace kernels
+{
+namespace
+{
+Status validate_arguments(const ITensorInfo *src, const ITensorInfo *dst)
+{
+    ARM_COMPUTE_RETURN_ERROR_ON_NULLPTR(src, dst);
+    // Note: ARM_COMPUTE_RETURN_ERROR_ON_CPU_F16_UNSUPPORTED(src) is not needed here as this kernel doesn't use NEON FP16 instructions.
+    ARM_COMPUTE_RETURN_ERROR_ON(src->data_type() == DataType::UNKNOWN);
+
+    ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_DATA_TYPES(src, dst);
+    ARM_COMPUTE_RETURN_ERROR_ON(src->tensor_shape().total_size() != dst->tensor_shape().total_size());
+    ARM_COMPUTE_RETURN_ERROR_ON_MISMATCHING_QUANTIZATION_INFO(src, dst);
+
+    return Status{};
+}
+
+template <typename T>
+inline void reshape_tensor(const Window &window, const ITensor *src, ITensor *dst)
+{
+    const TensorShape &src_shape = src->info()->tensor_shape();
+    const TensorShape &dst_shape = dst->info()->tensor_shape();
+    Coordinates        dst_coord{};
+
+    Iterator src_it(src, window);
+
+    execute_window_loop(window, [&](const Coordinates & id)
+    {
+        dst_coord                                              = index2coords(dst_shape, coords2index(src_shape, id));
+        *reinterpret_cast<T *>(dst->ptr_to_element(dst_coord)) = *reinterpret_cast<T *>(src_it.ptr());
+    },
+    src_it);
+}
+} // namespace
+
+void CpuReshapeKernel::configure(const ITensorInfo *src, ITensorInfo *dst)
+{
+    ARM_COMPUTE_ERROR_ON_NULLPTR(src, dst);
+    ARM_COMPUTE_ERROR_THROW_ON(validate_arguments(src, dst));
+
+    // Configure kernel window
+    Window win = calculate_max_window(*src);
+
+    // Set the destination valid region
+    dst->set_valid_region(ValidRegion(Coordinates(), dst->tensor_shape()));
+
+    ICpuKernel::configure(win);
+}
+
+Status CpuReshapeKernel::validate(const ITensorInfo *src, const ITensorInfo *dst)
+{
+    ARM_COMPUTE_RETURN_ON_ERROR(validate_arguments(src, dst));
+
+    return Status{};
+}
+
+void CpuReshapeKernel::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);
+
+    const auto src = tensors.get_const_tensor(TensorType::ACL_SRC);
+    auto       dst = tensors.get_tensor(TensorType::ACL_DST);
+
+    switch(src->info()->data_type())
+    {
+        case DataType::U8:
+        case DataType::S8:
+        case DataType::QASYMM8:
+        case DataType::QASYMM8_SIGNED:
+            reshape_tensor<uint8_t>(window, src, dst);
+            break;
+        case DataType::U16:
+        case DataType::S16:
+        case DataType::F16:
+            reshape_tensor<uint16_t>(window, src, dst);
+            break;
+        case DataType::U32:
+        case DataType::S32:
+        case DataType::F32:
+            reshape_tensor<uint32_t>(window, src, dst);
+            break;
+        default:
+            ARM_COMPUTE_ERROR("Unsupported data type!");
+    }
+}
+
+const char *CpuReshapeKernel::name() const
+{
+    return "CpuReshapeKernel";
+}
+} // namespace kernels
+} // namespace cpu
+} // namespace arm_compute
+/** [NEReshapeLayerKernel Kernel] **/