IVGCVSW-4403 Update readme for sample standalone dynamic backend

             and remove standalone dynamic reference backend

Signed-off-by: Narumol Prangnawarat <narumol.prangnawarat@arm.com>
Change-Id: I33bc82d8b07450a9c3f6c5dc415eda8427aec57b

4 files changed, 35 insertions, 129 deletions

diff --git a/src/dynamic/README.md b/src/dynamic/README.md
index ccdb668e73..d0e4d778d2 100644
--- a/src/dynamic/README.md
+++ b/src/dynamic/README.md
@@ -10,14 +10,38 @@ The details of how to add dynamic backends can be found in [src/backends/README.
 
 ## Standalone dynamic backend example
 
-The source code includes an example that is used to generate a dynamic implementation of the reference backend 
-is provided at
+The source code includes an example that is used to generate a simple dynamic backend and is provided at
 
-[RefDynamicBackend.hpp](./reference/RefDynamicBackend.hpp)
-[RefDynamicBackend.cpp](./reference/RefDynamicBackend.cpp)
+[SampleDynamicBackend.hpp](./sample/SampleDynamicBackend.hpp)
+[SampleDynamicBackend.cpp](./sample/SampleDynamicBackend.cpp)
+
+The details of how to create backends can be found in [src/backends/README.md](../backends/README.md).
 
 The makefile used for building the standalone reference dynamic backend is also provided:
-[CMakeLists.txt](./reference/CMakeLists.txt)
+[CMakeLists.txt](./sample/CMakeLists.txt)
+
+### Standalone dynamic backend build
+
+The easiest way to build a standalone sample dynamic backend is to build using environment configured compiler
+and specify the Arm NN path and Boost path to the CMake command:
+
+```shell
+cd ${DYNAMIC_BACKEND_DIR}
+mkdir build
+cd build
+cmake -DBOOST_ROOT=${BOOST_PATH} \
+      -DBoost_SYSTEM_LIBRARY=${BOOST_PATH}/lib/libboost_system.a \
+      -DBoost_FILESYSTEM_LIBRARY=${BOOST_PATH}/lib/libboost_filesystem.a \
+      -DARMNN_PATH=${ARMNN_PAH}/libarmnn.so ..
+```
+
+Then run the build
+
+```shell
+make
+```
+
+The library will be created in ${DYNAMIC_BACKEND_DIR}/build.
 
 
 ## Dynamic backend loading paths
@@ -30,4 +54,10 @@ A list of (absolute) paths can be specified at compile-time by setting a define
 -DDYNAMIC_BACKEND_PATHS="PATH_1:PATH_2...:PATH_N"
 ```
 
+Example for setting the path to the sample standalone dynamic backend built from the previous step:
+
+```shell
+-DDYNAMIC_BACKEND_PATHS=${DYNAMIC_BACKEND_DIR}/build
+```
+
 The paths will be processed in the same order as they are indicated in the macro.
diff --git a/src/dynamic/reference/CMakeLists.txt b/src/dynamic/reference/CMakeLists.txt
deleted file mode 100644
index 4c73cf7a71..0000000000
--- a/src/dynamic/reference/CMakeLists.txt
+++ /dev/null
@@ -1,76 +0,0 @@
-#
-# Copyright © 2019 Arm Ltd. All rights reserved.
-# SPDX-License-Identifier: MIT
-#
-
-cmake_minimum_required (VERSION 3.0.2)
-project(dynamic-reference)
-
-set(CMAKE_POSITION_INDEPENDENT_CODE ON)
-
-if("${CMAKE_SYSTEM_NAME}" STREQUAL Android)
-    add_definitions("-DBOOST_ALL_NO_LIB") # Turn off auto-linking as we specify the libs manually
-    find_package(Boost REQUIRED COMPONENTS system filesystem)
-    include_directories(SYSTEM "${Boost_INCLUDE_DIRS}")
-    link_directories(${Boost_LIBRARY_DIRS})
-endif()
-
-# File needed to wrap the existing backend into a dynamic one
-list(APPEND armnnRefDynamicBackend_sources
-    RefDynamicBackend.cpp
-    RefDynamicBackend.hpp
-)
-
-# Set the backend source path
-set(RefBackendPath ${PROJECT_SOURCE_DIR}/../../../src/backends/reference)
-
-# Source files of the backend, taken directly from the source tree
-file(GLOB RefBackendBaseFiles ${RefBackendPath}/*.cpp)
-file(GLOB RefBackendWorloadFiles ${RefBackendPath}/workloads/*.cpp)
-set(RefBackendFiles ${RefBackendBaseFiles} ${RefBackendWorloadFiles})
-
-# Remove the file that contains the static backend registration
-list(REMOVE_ITEM RefBackendFiles ${RefBackendPath}/RefRegistryInitializer.cpp)
-
-if("${CMAKE_SYSTEM_NAME}" STREQUAL Android)
-    # Set the common backend source path
-    set(CommonBackendPath ${PROJECT_SOURCE_DIR}/../../../src/backends/backendsCommon)
-    # Source files of the common backend
-    file(GLOB CommonBackendFiles ${CommonBackendPath}/*.cpp)
-
-    set(ArmnnPath ${PROJECT_SOURCE_DIR}/../../../src/armnn)
-    file(GLOB ArmnnFiles ${ArmnnPath}/*.cpp)
-
-    file(GLOB LayerFiles ${ArmnnPath}/layers/*cpp)
-    file(GLOB OptimizationFIles ${ArmnnPath}/optimizations/*.cpp)
-    file(GLOB ArmnnBaseFiles ${ArmnnPath}/*cpp)
-    list(REMOVE_ITEM LayerFiles ${ArmnnPath}/layers/AbsLayer.cpp)
-    list(REMOVE_ITEM LayerFiles ${ArmnnPath}/layers/RsqrtLayer.cpp)
-
-    set(ArmnnFiles ${ArmnnBaseFiles} ${LayerFiles} ${OptimizationFIles})
-
-    set(ArmnnUtilsPath ${PROJECT_SOURCE_DIR}/../../../src/armnnUtils)
-    file(GLOB ArmnnUtilsFiles ${ArmnnUtilsPath}/*cpp)
-
-    set(ProfilingPath ${PROJECT_SOURCE_DIR}/../../../src/profiling)
-    file(GLOB ProfilingFiles ${ProfilingPath}/*cpp)
-
-    add_library(Arm_CpuRef_backend MODULE
-        ${armnnRefDynamicBackend_sources} ${RefBackendFiles} ${CommonBackendFiles}
-        ${ArmnnFiles} ${ArmnnUtilsFiles} ${ProfilingFiles})
-
-else()
-    # Create the shared object
-    add_library(Arm_CpuRef_backend MODULE ${armnnRefDynamicBackend_sources} ${RefBackendFiles})
-endif()
-
-target_include_directories(Arm_CpuRef_backend PRIVATE ${PROJECT_SOURCE_DIR}/../../../include)
-target_include_directories(Arm_CpuRef_backend PRIVATE ${PROJECT_SOURCE_DIR}/../../../third-party) # for half
-target_include_directories(Arm_CpuRef_backend PRIVATE ${PROJECT_SOURCE_DIR}/../../../src/armnn)
-target_include_directories(Arm_CpuRef_backend PRIVATE ${PROJECT_SOURCE_DIR}/../../../src/armnnUtils)
-target_include_directories(Arm_CpuRef_backend PRIVATE ${PROJECT_SOURCE_DIR}/../../../src/backends)
-target_include_directories(Arm_CpuRef_backend PRIVATE ${PROJECT_SOURCE_DIR}/../../../src/profiling)
-if("${CMAKE_SYSTEM_NAME}" STREQUAL Android)
-    target_include_directories(Arm_CpuRef_backend PRIVATE ${Boost_INCLUDE_DIRS})
-    target_link_libraries(Arm_CpuRef_backend ${Boost_SYSTEM_LIBRARY} ${Boost_FILESYSTEM_LIBRARY})
-endif()
diff --git a/src/dynamic/reference/RefDynamicBackend.cpp b/src/dynamic/reference/RefDynamicBackend.cpp
deleted file mode 100644
index f2ed0f6033..0000000000
--- a/src/dynamic/reference/RefDynamicBackend.cpp
+++ /dev/null
@@ -1,33 +0,0 @@
-//
-// Copyright © 2019 Arm Ltd. All rights reserved.
-// SPDX-License-Identifier: MIT
-//
-
-#include "RefDynamicBackend.hpp"
-
-#include <reference/RefBackend.hpp>
-
-using namespace armnn;
-
-const char* GetBackendId()
-{
-    return RefBackend::GetIdStatic().Get().c_str();
-}
-
-void GetVersion(uint32_t* outMajor, uint32_t* outMinor)
-{
-    if (!outMajor || !outMinor)
-    {
-        return;
-    }
-
-    BackendVersion apiVersion = IBackendInternal::GetApiVersion();
-
-    *outMajor = apiVersion.m_Major;
-    *outMinor = apiVersion.m_Minor;
-}
-
-void* BackendFactory()
-{
-    return new RefBackend();
-}
diff --git a/src/dynamic/reference/RefDynamicBackend.hpp b/src/dynamic/reference/RefDynamicBackend.hpp
deleted file mode 100644
index bc680a1fba..0000000000
--- a/src/dynamic/reference/RefDynamicBackend.hpp
+++ /dev/null
@@ -1,15 +0,0 @@
-//
-// Copyright © 2019 Arm Ltd. All rights reserved.
-// SPDX-License-Identifier: MIT
-//
-
-#pragma once
-
-#include <cstdint>
-
-extern "C"
-{
-const char* GetBackendId();
-void GetVersion(uint32_t* outMajor, uint32_t* outMinor);
-void* BackendFactory();
-}