IVGCVSW-2454 Merge together the pluggable backends work (was in a

separate branch) and master

 * Brings in all the changes done for the pluggable backends
 * Added sub-graph support and tests
 * Added precompiled layer support and tests
 * Moved BackendSettings to a separate file
 * Removed the backend-specific code
 * Ported DebugLayer and associated functionality
 * Included fixes to make those changes work with master

Change-Id: Id7028fa7917527b844628d5aff5732e3d94c0488

1 files changed, 87 insertions, 0 deletions

diff --git a/src/armnn/BackendSettings.hpp b/src/armnn/BackendSettings.hpp
new file mode 100644
index 0000000000..931a0681db
--- /dev/null
+++ b/src/armnn/BackendSettings.hpp
@@ -0,0 +1,87 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include <armnn/BackendId.hpp>
+#include <vector>
+
+namespace armnn
+{
+
+struct BackendSettings
+{
+    BackendIdVector m_PreferredBackends;
+    BackendIdSet    m_SupportedBackends;
+    BackendIdSet    m_SelectedBackends;
+    BackendIdSet    m_IgnoredBackends;
+
+    BackendSettings() = default;
+
+    BackendSettings(const BackendIdVector& preferredBackends,
+                    const IDeviceSpec& deviceSpec)
+    {
+        Initialize(preferredBackends, deviceSpec);
+    }
+
+    bool IsBackendPreferred(const BackendId& backend) const
+    {
+        return IsBackendInCollection(backend, m_PreferredBackends);
+    }
+
+    bool IsBackendSupported(const BackendId& backend) const
+    {
+        return IsBackendInCollection(backend, m_SupportedBackends);
+    }
+
+    bool IsBackendSelected(const BackendId& backend) const
+    {
+        return IsBackendInCollection(backend, m_SelectedBackends);
+    }
+
+    bool IsBackendIgnored(const BackendId& backend) const
+    {
+        return IsBackendInCollection(backend, m_IgnoredBackends);
+    }
+
+    bool IsCpuRefUsed() const
+    {
+        BackendId cpuBackendId(Compute::CpuRef);
+        return IsBackendSupported(cpuBackendId) && IsBackendPreferred(cpuBackendId);
+    }
+
+    BackendIdVector GetAvailablePreferredBackends() const
+    {
+        BackendIdVector availablePreferredBackends;
+        for (const BackendId& backend : m_PreferredBackends)
+        {
+            if (IsBackendSupported(backend) && !IsBackendIgnored(backend))
+            {
+                availablePreferredBackends.push_back(backend);
+            }
+        }
+        return availablePreferredBackends;
+    }
+
+private:
+    void Initialize(const BackendIdVector& preferredBackends,
+                    const IDeviceSpec& deviceSpec)
+    {
+        // Copy preferred backends from input
+        m_PreferredBackends = preferredBackends;
+
+        // Obtain list of supported backends
+        const DeviceSpec& spec = *boost::polymorphic_downcast<const DeviceSpec*>(&deviceSpec);
+        m_SupportedBackends = spec.GetSupportedBackends();
+    }
+
+    template<typename Collection>
+    bool IsBackendInCollection(const BackendId& backend, const Collection& collection) const
+    {
+        return std::find(collection.begin(), collection.end(), backend) != collection.end();
+    }
+};
+
+} //namespace armnn