From d556d7bafe6ad943f4aca0f5285ada7b8ce497f7 Mon Sep 17 00:00:00 2001
From: Michele Di Giorgio <michele.digiorgio@arm.com>
Date: Tue, 27 Oct 2020 10:56:31 +0000
Subject: Integrate improved pooling layer on NEON

Resolves COMPMID-4035

Change-Id: I559f8c4208fba9193dfe5012f03ddaf26c746215
Signed-off-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4855
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
---
 .../arm_conv/pooling/pooling_implementation.hpp    | 103 +++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 src/core/NEON/kernels/arm_conv/pooling/pooling_implementation.hpp

(limited to 'src/core/NEON/kernels/arm_conv/pooling/pooling_implementation.hpp')

diff --git a/src/core/NEON/kernels/arm_conv/pooling/pooling_implementation.hpp b/src/core/NEON/kernels/arm_conv/pooling/pooling_implementation.hpp
new file mode 100644
index 0000000000..3d968b84e5
--- /dev/null
+++ b/src/core/NEON/kernels/arm_conv/pooling/pooling_implementation.hpp
@@ -0,0 +1,103 @@
+/*
+ * 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.
+ */
+#pragma once
+
+#include "pooling.hpp"
+
+#include <cstddef>
+#include <functional>
+#include <cstring>
+
+namespace arm_conv {
+namespace pooling {
+
+template <typename TInput, typename TOutput, class OutputStage = Nothing>
+struct PoolingImplementation
+{
+  const PoolingMethod method;
+  const char * name;
+  std::function<bool(const PoolingArgs &, const OutputStage &)> is_supported;
+  std::function<uint64_t(const PoolingArgs &, const OutputStage &)> cycle_estimate;
+  std::function<PoolingCommon<TInput, TOutput, OutputStage> *(const PoolingArgs &, const OutputStage &)> initialise;
+
+  bool get_is_supported(const PoolingArgs &args, const OutputStage &os) const
+  {
+    return (is_supported == nullptr) ? true : is_supported(args, os);
+  }
+
+  uint64_t get_cycle_estimate(const PoolingArgs &args, const OutputStage &os) const
+  {
+    return (cycle_estimate == nullptr) ? 0 : cycle_estimate(args, os);
+  }
+
+  PoolingCommon<TInput, TOutput, OutputStage> *get_instance(const PoolingArgs &args, const OutputStage &os) const
+  {
+    return initialise(args, os);
+  }
+};
+
+template <typename TInput, typename TOutput, class OutputStage = Nothing>
+const PoolingImplementation<TInput, TOutput, OutputStage> *pooling_implementation_list();
+
+template <typename TInput, typename TOutput, class OutputStage = Nothing>
+bool find_implementation(
+  const PoolingArgs &args,
+  const OutputStage &os,
+  const PoolingImplementation<TInput, TOutput, OutputStage> * &selected
+)
+{
+  // For now, return the first valid implementation
+  const auto *impl = pooling_implementation_list<TInput, TOutput, OutputStage>();
+  for (; impl->method != PoolingMethod::DEFAULT; impl++)
+  {
+    if (args.config != nullptr)
+    {
+      // Apply filters provided by the configuration
+      const auto cfg = args.config;
+
+      if (cfg->filter != "" && !std::strstr(impl->name, cfg->filter.c_str()))
+      {
+        continue;
+      }
+    }
+
+    if (impl->get_is_supported(args, os))
+    {
+      selected = impl;
+      return true;
+    }
+  }
+  return false;
+}
+
+template <typename TInput, typename TOutput, class OutputStage>
+UniquePoolingCommon<TInput, TOutput, OutputStage> pooling(const PoolingArgs &args, const OutputStage &os)
+{
+  const PoolingImplementation<TInput, TOutput, OutputStage> *impl = nullptr;
+  const bool success = find_implementation<TInput, TOutput, OutputStage>(args, os, impl);
+  return UniquePoolingCommon<TInput, TOutput, OutputStage>(success ? impl->get_instance(args, os) : nullptr);
+}
+
+}  //  namespace pooling
+}  //  namespace arm_conv
-- 
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