Make CpuActivation stateless

- Rename NEActivationLayer to CpuActivation
- Add member function to generate execution window

Partially Resolves: COMPMID-3992

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: I4e1ae15cf456b860d3080b2fedc4dbcce7d1bb79
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4791
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>

1 files changed, 12 insertions, 35 deletions

diff --git a/src/runtime/NEON/functions/NEActivationLayer.cpp b/src/runtime/NEON/functions/NEActivationLayer.cpp
index 27f01f67ce..2b5c51fa5a 100644
--- a/src/runtime/NEON/functions/NEActivationLayer.cpp
+++ b/src/runtime/NEON/functions/NEActivationLayer.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2020 Arm Limited.
+ * Copyright (c) 2017-2021 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -23,37 +23,17 @@
  */
 #include "arm_compute/runtime/NEON/functions/NEActivationLayer.h"
 
-#include "arm_compute/core/Error.h"
-#include "arm_compute/core/experimental/Types.h"
-#include "arm_compute/runtime/IRuntimeContext.h"
-#include "arm_compute/runtime/Tensor.h"
-#include "src/core/NEON/kernels/NEActivationLayerKernel.h"
+#include "arm_compute/core/Validate.h"
+#include "src/runtime/cpu/operators/CpuActivation.h"
 
 namespace arm_compute
 {
-namespace experimental
-{
-NEActivationLayer::~NEActivationLayer() = default;
-
-void NEActivationLayer::configure(const ITensorInfo *input, ITensorInfo *output, const ActivationLayerInfo &activation_info)
-{
-    auto k = std::make_unique<NEActivationLayerKernel>();
-    k->configure(input, output, activation_info);
-    _kernel = std::move(k);
-}
-
-Status NEActivationLayer::validate(const ITensorInfo *input, const ITensorInfo *output, const ActivationLayerInfo &activation_info)
-{
-    return NEActivationLayerKernel::validate(input, output, activation_info);
-}
-} // namespace experimental
-
 struct NEActivationLayer::Impl
 {
-    const ITensor                                   *src{ nullptr };
-    ITensor                                         *dst{ nullptr };
-    IRuntimeContext                                 *ctx{ nullptr };
-    std::unique_ptr<experimental::NEActivationLayer> op{ nullptr };
+    const ITensor                      *src{ nullptr };
+    ITensor                            *dst{ nullptr };
+    IRuntimeContext                    *ctx{ nullptr };
+    std::unique_ptr<cpu::CpuActivation> op{ nullptr };
 };
 
 NEActivationLayer::NEActivationLayer(IRuntimeContext *ctx)
@@ -61,27 +41,24 @@ NEActivationLayer::NEActivationLayer(IRuntimeContext *ctx)
 {
     _impl->ctx = ctx;
 }
-
 NEActivationLayer::NEActivationLayer(NEActivationLayer &&) = default;
-
 NEActivationLayer &NEActivationLayer::operator=(NEActivationLayer &&) = default;
-
-NEActivationLayer::~NEActivationLayer() = default;
+NEActivationLayer::~NEActivationLayer()                               = default;
 
 void NEActivationLayer::configure(ITensor *input, ITensor *output, ActivationLayerInfo activation_info)
 {
-    ARM_COMPUTE_ERROR_ON_NULLPTR(input);
-
     _impl->src = input;
     _impl->dst = output == nullptr ? input : output;
 
-    _impl->op = std::make_unique<experimental::NEActivationLayer>();
+    ARM_COMPUTE_ERROR_ON_NULLPTR(_impl->src, _impl->dst);
+
+    _impl->op = std::make_unique<cpu::CpuActivation>();
     _impl->op->configure(_impl->src->info(), _impl->dst->info(), activation_info);
 }
 
 Status NEActivationLayer::validate(const ITensorInfo *input, const ITensorInfo *output, const ActivationLayerInfo &act_info)
 {
-    return experimental::NEActivationLayer::validate(input, output, act_info);
+    return cpu::CpuActivation::validate(input, output, act_info);
 }
 
 void NEActivationLayer::run()