IVGCVSW-4516 Add ConvertFp32ToBf16Layer and Ref workload support

Signed-off-by: Narumol Prangnawarat <narumol.prangnawarat@arm.com>
Change-Id: I9099a4f840fb747336f77d20a0868b64e801a310

5 files changed, 57 insertions, 0 deletions

diff --git a/src/backends/reference/workloads/CMakeLists.txt b/src/backends/reference/workloads/CMakeLists.txt
index 86764d8a01..9f3880e077 100644
--- a/src/backends/reference/workloads/CMakeLists.txt
+++ b/src/backends/reference/workloads/CMakeLists.txt
@@ -73,6 +73,8 @@ list(APPEND armnnRefBackendWorkloads_sources
     RefConvertBf16ToFp32Workload.hpp
     RefConvertFp16ToFp32Workload.cpp
     RefConvertFp16ToFp32Workload.hpp
+    RefConvertFp32ToBf16Workload.cpp
+    RefConvertFp32ToBf16Workload.hpp
     RefConvertFp32ToFp16Workload.cpp
     RefConvertFp32ToFp16Workload.hpp
     RefConvolution2dWorkload.cpp
diff --git a/src/backends/reference/workloads/RefConvertFp32ToBf16Workload.cpp b/src/backends/reference/workloads/RefConvertFp32ToBf16Workload.cpp
new file mode 100644
index 0000000000..181b236e83
--- /dev/null
+++ b/src/backends/reference/workloads/RefConvertFp32ToBf16Workload.cpp
@@ -0,0 +1,27 @@
+//
+// Copyright © 2020 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include "RefConvertFp32ToBf16Workload.hpp"
+#include "RefWorkloadUtils.hpp"
+
+#include <armnnUtils/FloatingPointConverter.hpp>
+
+#include <BFloat16.hpp>
+
+namespace armnn
+{
+
+void RefConvertFp32ToBf16Workload::Execute() const
+{
+    ARMNN_SCOPED_PROFILING_EVENT(Compute::CpuRef, "RefConvertFp32ToBf16Workload_Execute");
+
+    const float* const input = GetInputTensorDataFloat(0, m_Data);
+    BFloat16* const output = GetOutputTensorDataBFloat16(0, m_Data);
+
+    unsigned int numElements = GetTensorInfo(m_Data.m_Inputs[0]).GetNumElements();
+    armnnUtils::FloatingPointConverter::ConvertFloat32ToBFloat16(input, numElements, output);
+}
+
+} //namespace armnn
diff --git a/src/backends/reference/workloads/RefConvertFp32ToBf16Workload.hpp b/src/backends/reference/workloads/RefConvertFp32ToBf16Workload.hpp
new file mode 100644
index 0000000000..409603bb6c
--- /dev/null
+++ b/src/backends/reference/workloads/RefConvertFp32ToBf16Workload.hpp
@@ -0,0 +1,21 @@
+//
+// Copyright © 2020 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include <backendsCommon/Workload.hpp>
+#include <backendsCommon/WorkloadData.hpp>
+
+namespace armnn
+{
+
+class RefConvertFp32ToBf16Workload : public Float32ToBFloat16Workload<ConvertFp32ToBf16QueueDescriptor>
+{
+public:
+    using Float32ToBFloat16Workload<ConvertFp32ToBf16QueueDescriptor>::Float32ToBFloat16Workload;
+    virtual void Execute() const override;
+};
+
+} //namespace armnn
diff --git a/src/backends/reference/workloads/RefWorkloadUtils.hpp b/src/backends/reference/workloads/RefWorkloadUtils.hpp
index 69713145c0..f1b31571db 100644
--- a/src/backends/reference/workloads/RefWorkloadUtils.hpp
+++ b/src/backends/reference/workloads/RefWorkloadUtils.hpp
@@ -75,6 +75,12 @@ const BFloat16* GetInputTensorDataBFloat16(unsigned int idx, const PayloadType&
     return GetInputTensorData<BFloat16>(idx, data);
 }
 
+template <typename PayloadType>
+BFloat16* GetOutputTensorDataBFloat16(unsigned int idx, const PayloadType& data)
+{
+    return GetOutputTensorData<BFloat16>(idx, data);
+}
+
 ////////////////////////////////////////////
 /// u8 helpers
 ////////////////////////////////////////////
diff --git a/src/backends/reference/workloads/RefWorkloads.hpp b/src/backends/reference/workloads/RefWorkloads.hpp
index 37d79f0fc0..cbfade3c02 100644
--- a/src/backends/reference/workloads/RefWorkloads.hpp
+++ b/src/backends/reference/workloads/RefWorkloads.hpp
@@ -24,6 +24,7 @@
 #include "RefConcatWorkload.hpp"
 #include "RefConvertBf16ToFp32Workload.hpp"
 #include "RefConvertFp16ToFp32Workload.hpp"
+#include "RefConvertFp32ToBf16Workload.hpp"
 #include "RefConvertFp32ToFp16Workload.hpp"
 #include "RefDebugWorkload.hpp"
 #include "RefDepthToSpaceWorkload.hpp"