src/backends/backendsCommon/test/layerTests/ConvertFp32ToBf16TestImpl.cpp

//
// Copyright © 2020 Arm Ltd and Contributors. All rights reserved.
// SPDX-License-Identifier: MIT
//

#include "ConvertFp32ToBf16TestImpl.hpp"

#include <armnnTestUtils/TensorCopyUtils.hpp>
#include <armnnTestUtils/WorkloadTestUtils.hpp>

#include <armnnTestUtils/TensorHelpers.hpp>

LayerTestResult<armnn::BFloat16, 4> ConvertFp32ToBf16Test(
    armnn::IWorkloadFactory& workloadFactory,
    const armnn::IBackendInternal::IMemoryManagerSharedPtr& memoryManager,
    const armnn::ITensorHandleFactory& tensorHandleFactory)
{
    IgnoreUnused(memoryManager);

    const armnn::TensorInfo inputTensorInfo({1, 2, 4, 3}, armnn::DataType::Float32);
    const armnn::TensorInfo outputTensorInfo({1, 2, 4, 3}, armnn::DataType::BFloat16);

    std::vector<float> input =
        {
          -37.5f, -15.2f, -8.76f,
          -2.0f, -1.5f, -1.3f,
          -0.5f, -0.4f, 0.0f,
          1.0f, 0.4f, 0.5f,
          1.3f, 1.5f, 2.0f,
          8.76f, 15.2f, 37.5f,
          3.8f, // 0x40733333 Round down
          3.1055E+29f, // 0x707ADC3C Round up
          9.149516E-10f, // 0x307B7FFF Round down
          -3.8f, // 0xC0733333 Round down
          -3.1055E+29f, // 0xF07ADC3C Round up
          -9.149516E-10f // 0xB07B7FFF Round down
        };

    std::vector<armnn::BFloat16> expectedOutput = armnnUtils::QuantizedVector<armnn::BFloat16>(
        {
          -37.5f, -15.2f, -8.76f,
          -2.0f, -1.5f, -1.3f,
          -0.5f, -0.4f, 0.0f,
          1.0f, 0.4f, 0.5f,
          1.3f, 1.5f, 2.0f,
          8.76f, 15.2f, 37.5f,
          3.796875f, // 0x4073
          3.1072295E29f, // 0x707B
          9.131327E-10f, // 0x307B
          -3.796875f, // 0xC073
          -3.1072295E29f, // 0xF07B
          -9.131327E-10f // 0xB07B
        },
        1.0f, 0);

    std::vector<armnn::BFloat16> actualOutput(outputTensorInfo.GetNumElements());

    std::unique_ptr<armnn::ITensorHandle> inputHandle = tensorHandleFactory.CreateTensorHandle(inputTensorInfo);
    std::unique_ptr<armnn::ITensorHandle> outputHandle = tensorHandleFactory.CreateTensorHandle(outputTensorInfo);

    armnn::ConvertFp32ToBf16QueueDescriptor data;
    armnn::WorkloadInfo info;
    AddInputToWorkload(data, info, inputTensorInfo, inputHandle.get());
    AddOutputToWorkload(data, info, outputTensorInfo, outputHandle.get());

    std::unique_ptr<armnn::IWorkload> workload = workloadFactory.CreateWorkload(armnn::LayerType::ConvertFp32ToBf16,
                                                                                data,
                                                                                info);

    inputHandle->Allocate();
    outputHandle->Allocate();

    CopyDataToITensorHandle(inputHandle.get(), input.data());

    workload->Execute();

    CopyDataFromITensorHandle(actualOutput.data(), outputHandle.get());

    return LayerTestResult<armnn::BFloat16, 4>(actualOutput,
                                               expectedOutput,
                                               outputHandle->GetShape(),
                                               outputTensorInfo.GetShape());

}