COMPMID-2450: Implement CLMaxUnpoolingLayer

- Add OpenCL kernel for Max unpooling layer
- Add tests for validating the result

Change-Id: If7ca79566a1198e3141f880abf46738980a62c81
Signed-off-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3606
Reviewed-by: Pablo Marquez <pablo.tello@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>

2 files changed, 87 insertions, 0 deletions

diff --git a/arm_compute/core/CL/CLKernels.h b/arm_compute/core/CL/CLKernels.h
index 253df597e0..dbda0dbb4b 100644
--- a/arm_compute/core/CL/CLKernels.h
+++ b/arm_compute/core/CL/CLKernels.h
@@ -108,6 +108,7 @@
 #include "arm_compute/core/CL/kernels/CLLKTrackerKernel.h"
 #include "arm_compute/core/CL/kernels/CLLocallyConnectedMatrixMultiplyKernel.h"
 #include "arm_compute/core/CL/kernels/CLMagnitudePhaseKernel.h"
+#include "arm_compute/core/CL/kernels/CLMaxUnpoolingLayerKernel.h"
 #include "arm_compute/core/CL/kernels/CLMeanStdDevKernel.h"
 #include "arm_compute/core/CL/kernels/CLMeanStdDevNormalizationKernel.h"
 #include "arm_compute/core/CL/kernels/CLMedian3x3Kernel.h"
diff --git a/arm_compute/core/CL/kernels/CLMaxUnpoolingLayerKernel.h b/arm_compute/core/CL/kernels/CLMaxUnpoolingLayerKernel.h
new file mode 100644
index 0000000000..9d51f6b59c
--- /dev/null
+++ b/arm_compute/core/CL/kernels/CLMaxUnpoolingLayerKernel.h
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2020 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_CLMAXUNPOOLINGLAYERKERNEL_H
+#define ARM_COMPUTE_CLMAXUNPOOLINGLAYERKERNEL_H
+
+#include "arm_compute/core/CL/ICLKernel.h"
+
+namespace arm_compute
+{
+class ICLTensor;
+
+/** Interface for the pooling layer kernel */
+class CLMaxUnpoolingLayerKernel : public ICLKernel
+{
+public:
+    /** Default constructor */
+    CLMaxUnpoolingLayerKernel();
+    /** Prevent instances of this class from being copied (As this class contains pointers) */
+    CLMaxUnpoolingLayerKernel(const CLMaxUnpoolingLayerKernel &) = delete;
+    /** Prevent instances of this class from being copied (As this class contains pointers) */
+    CLMaxUnpoolingLayerKernel &operator=(const CLMaxUnpoolingLayerKernel &) = delete;
+    /** Allow instances of this class to be moved */
+    CLMaxUnpoolingLayerKernel(CLMaxUnpoolingLayerKernel &&) = default;
+    /** Allow instances of this class to be moved */
+    CLMaxUnpoolingLayerKernel &operator=(CLMaxUnpoolingLayerKernel &&) = default;
+    /** Default destructor */
+    ~CLMaxUnpoolingLayerKernel() = default;
+    /** Set the input and output tensors.
+     *
+     * @note Output shape must be equal to the shape of the original input to pool.
+     *
+     * @param[in]  compile_context The compile context to be used.
+     * @param[in]  input           Source tensor. Data types supported: QASYMM8/QASYMM8_SIGNED/F16/F32.
+     * @param[in]  indices         Tensor containing the offset to store the input elements in the output tensor.
+     *                             @ref CLPoolingLayerKernel with indices should precede this function in order to
+     *                             properly reconstruct the output tensor.
+     *                             The tensor shape of this tensor has to be equal to the input tensor shape. Data type supported: U32.
+     * @param[out] output          Destination tensor. Data types supported: Same as @p input.
+     * @param[in]  pool_info       Contains pooling operation information described in @ref PoolingLayerInfo.
+     */
+    void configure(const CLCompileContext &compile_context, const ICLTensor *input, const ICLTensor *indices, ICLTensor *output, const PoolingLayerInfo &pool_info);
+    /** Static function to check if given info will lead to a valid configuration of @ref CLMaxUnpoolingLayerKernel
+     *
+     * @param[in] input     Source tensor info. Data types supported: QASYMM8/QASYMM8_SIGNED/F16/F32.
+     * @param[in] output    Destination tensor info. Data types supported: Same as @p input.
+     * @param[in] indices   TensorInfo associated to the tensor containing the offset to store the input elements in the output tensor.
+     *                      @ref CLPoolingLayerKernel with indices should precede this function in order to
+     *                      properly reconstruct the output tensor.
+     *                      The tensor shape of this tensor has to be equal to the input tensor shape. Data type supported: U32.
+     * @param[in] pool_info Contains pooling operation information described in @ref PoolingLayerInfo.
+     *
+     * @return a status
+     */
+    static Status validate(const ITensorInfo *input, const ITensorInfo *indices, const ITensorInfo *output, const PoolingLayerInfo &pool_info);
+
+    // Inherited methods overridden
+    void run(const Window &window, cl::CommandQueue &queue) override;
+
+private:
+    const ICLTensor *_input;
+    ICLTensor       *_output;
+    const ICLTensor *_indices;
+};
+} // namespace arm_compute
+#endif /*ARM_COMPUTE_CLMAXUNPOOLINGLAYERKERNEL_H */