Rename ported functions

Rename CpuPooling to CpuPool2d
Rename CpuPoolingKernel to CpuPool2dKernel
Rename CpuPoolingAssemblyWrapperKernel to CpuPool2dAssemblyWrapperKernel
Move CpuPool2dAssemblyWrapperKernel in internal subfolder
Rename CpuDepthwiseConvolutionNativeKernel to CpuDepthwiseConv2dNativeKernel
Rename CpuDepthwiseConvolutionAssemblyDispatch to CpuDepthwiseConv2dAssemblyDispatch
Rename CpuDepthwiseConvolution to CpuDepthwiseConv2d
Rename CpuDirectConvolutionKernel to CpuDirectConv2dKernel
Rename CpuDirectConvolutionOutputStageKernel to CpuDirectConv2dOutputStageKernel
Rename CpuDirectConvolution to CpuDirectConv2d
Rename ClPoolingKernel to ClPool2dKernel
Rename ClPooling to ClPool2d
Rename ClDirectConvolutionKernel to ClDirectConv2dKernel

Resolves: COMPMID-4405

Change-Id: I8e48f015e4e492a76a7512f5679cb3eb0cd028f6
Signed-off-by: Manuel Bottini <manuel.bottini@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/5708
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/runtime/cpu/operators/CpuPool2d.h b/src/runtime/cpu/operators/CpuPool2d.h
new file mode 100644
index 0000000..ae3d115
--- /dev/null
+++ b/src/runtime/cpu/operators/CpuPool2d.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright (c) 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.
+ */
+#ifndef ARM_COMPUTE_CPU_POOL2D_H
+#define ARM_COMPUTE_CPU_POOL2D_H
+
+#include "arm_compute/core/experimental/Types.h"
+#include "src/core/common/Macros.h"
+#include "src/runtime/cpu/ICpuOperator.h"
+
+#include <memory>
+
+namespace arm_compute
+{
+// Forward Declarations
+struct PoolingLayerInfo;
+
+namespace cpu
+{
+/** Basic function to simulate a pooling layer with the specified pooling operation. This function calls the following kernels:
+ *
+ * -# @ref NEFillBorderKernel (executed if padding size is different from zero)
+ * -# @ref kernels::CpuPool2dKernel
+ * -# @ref kernels::CpuPool2dAssemblyWrapperKernel
+ */
+class CpuPool2d : public ICpuOperator
+{
+public:
+    /** Constructor */
+    CpuPool2d();
+    ARM_COMPUTE_DISALLOW_COPY_ALLOW_MOVE(CpuPool2d);
+    /** Default destructor */
+    ~CpuPool2d();
+    /** Set the src and dst tensors.
+     *
+     * @note F16 is supported for pool sizes 2 and 3 only
+     *
+     * @param[in, out] src       Source tensor info. (Written to only when padding != 0) Data types supported: QASYMM8/QASYMM8_SIGNED/F16/F32.
+     * @param[out]     dst       Destination tensor info. Data types supported: same as @p src.
+     * @param[in]      pool_info Contains pooling operation information described in @ref PoolingLayerInfo.
+     * @param[out]     indices   (optional) The indices of the maximal values. Data type supported: U32.
+     */
+    void configure(ITensorInfo *src, ITensorInfo *dst, const PoolingLayerInfo &pool_info, ITensorInfo *indices = nullptr);
+    /** Static function to check if given info will lead to a valid configuration
+     *
+     * Similar to CpuPool2d::configure()
+     *
+     * @return a status
+     */
+    static Status validate(const ITensorInfo *src, const ITensorInfo *dst, const PoolingLayerInfo &pool_info, const ITensorInfo *indices = nullptr);
+
+    // Inherited methods overridden:
+    void run(ITensorPack &tensors) override;
+    experimental::MemoryRequirements workspace() const override;
+
+private:
+    std::unique_ptr<INEKernel> _pooling_layer_kernel;
+    std::unique_ptr<INEKernel> _border_handler;
+    std::unique_ptr<INEKernel> _asm_glue;
+
+    bool                             _is_global_pooling_layer;
+    DataLayout                       _data_layout;
+    experimental::MemoryRequirements _mem_req;
+};
+} // namespace cpu
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_CPU_POOL2D_H */