COMPMID-1574 Implement ReduceMean in OpenCL

Change-Id: Id331199f569f52a37280a9ada5bf84694580b93c
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/152843
Tested-by: bsgcomp <bsgcomp@arm.com>
Reviewed-by: Michele DiGiorgio <michele.digiorgio@arm.com>

1 files changed, 122 insertions, 0 deletions

diff --git a/src/runtime/CL/functions/CLReduceMean.cpp b/src/runtime/CL/functions/CLReduceMean.cpp
new file mode 100644
index 0000000000..6e55b81d1c
--- /dev/null
+++ b/src/runtime/CL/functions/CLReduceMean.cpp
@@ -0,0 +1,122 @@
+/*
+ * 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/runtime/CL/functions/CLReduceMean.h"
+
+#include "arm_compute/core/CL/ICLTensor.h"
+#include "arm_compute/core/CL/kernels/CLReductionOperationKernel.h"
+#include "arm_compute/core/Types.h"
+#include "arm_compute/core/utils/helpers/tensor_transform.h"
+#include "arm_compute/runtime/CL/CLScheduler.h"
+#include "support/ToolchainSupport.h"
+
+namespace arm_compute
+{
+CLReduceMean::CLReduceMean(std::shared_ptr<IMemoryManager> memory_manager)
+    : _memory_group(std::move(memory_manager)), _reduction_kernels(), _reduced_outs(), _reshape(), _reduction_ops(), _keep_dims()
+{
+}
+void CLReduceMean::configure(ICLTensor *input, const Coordinates &reduction_axis, bool keep_dims, ICLTensor *output)
+{
+    ARM_COMPUTE_ERROR_ON_NULLPTR(input);
+
+    _reduction_ops     = reduction_axis.num_dimensions();
+    _reduction_kernels = arm_compute::support::cpp14::make_unique<CLReductionOperation[]>(_reduction_ops);
+    _reduced_outs      = arm_compute::support::cpp14::make_unique<CLTensor[]>(_reduction_ops - (keep_dims ? 1 : 0));
+    _keep_dims         = keep_dims;
+
+    // Perform reduction for every axis
+    for(unsigned int i = 0; i < _reduction_ops; ++i)
+    {
+        TensorShape out_shape = i == 0 ? input->info()->tensor_shape() : (_reduced_outs.get() + i - 1)->info()->tensor_shape();
+        out_shape.set(reduction_axis[i], 1);
+        auto in = (i == 0) ? input : (_reduced_outs.get() + i - 1);
+
+        if(i == _reduction_ops - 1 && keep_dims)
+        {
+            _reduction_kernels[i].configure(in, output, reduction_axis[i], ReductionOperation::MEAN_SUM);
+        }
+        else
+        {
+            _reduced_outs[i].allocator()->init(TensorInfo(out_shape, input->info()->num_channels(), input->info()->data_type(), input->info()->quantization_info()));
+            _memory_group.manage(_reduced_outs.get() + i);
+            _reduction_kernels[i].configure(in, _reduced_outs.get() + i, reduction_axis[i], ReductionOperation::MEAN_SUM);
+        }
+    }
+
+    // Allocate intermediate tensors
+    for(unsigned int i = 0; i < _reduction_ops - (keep_dims ? 1 : 0); ++i)
+    {
+        _reduced_outs[i].allocator()->allocate();
+    }
+
+    // Configure reshape layer if we want to drop the dimensions
+    if(!keep_dims)
+    {
+        TensorShape out_shape = input->info()->tensor_shape();
+        for(unsigned int i = 0; i < _reduction_ops; ++i)
+        {
+            out_shape.remove_dimension(reduction_axis[i]);
+        }
+        auto_init_if_empty(*output->info(), input->info()->clone()->set_tensor_shape(out_shape));
+        _reshape.configure(_reduced_outs.get() + _reduction_ops - 1, output);
+    }
+}
+
+Status CLReduceMean::validate(const ITensorInfo *input, const Coordinates &reduction_axis, bool keep_dims, const ITensorInfo *output)
+{
+    ARM_COMPUTE_UNUSED(keep_dims);
+    ARM_COMPUTE_RETURN_ERROR_ON_NULLPTR(input);
+    ARM_COMPUTE_RETURN_ERROR_ON(reduction_axis.num_dimensions() > input->num_dimensions());
+
+    for(unsigned int i = 0; i < reduction_axis.num_dimensions(); ++i)
+    {
+        ARM_COMPUTE_RETURN_ERROR_ON(reduction_axis[i] > 3);
+        if(output->total_size() > 0)
+        {
+            ARM_COMPUTE_RETURN_ERROR_ON(output->dimension(reduction_axis[i]) != 1);
+            ARM_COMPUTE_RETURN_ERROR_ON(static_cast<unsigned int>(reduction_axis[i]) > input->num_dimensions() - 1);
+        }
+
+        ARM_COMPUTE_RETURN_ON_ERROR(CLReductionOperationKernel::validate(input, output, reduction_axis[i], ReductionOperation::MEAN_SUM, 0));
+    }
+
+    return Status{};
+}
+
+void CLReduceMean::run()
+{
+    _memory_group.acquire();
+
+    for(unsigned int i = 0; i < _reduction_ops; ++i)
+    {
+        _reduction_kernels[i].run();
+    }
+
+    if(!_keep_dims)
+    {
+        _reshape.run();
+    }
+    _memory_group.release();
+}
+} // namespace arm_compute