NeonCastWorkload.cpp

Go to the documentation of this file.

//
// Copyright © 2021-2024 Arm Ltd and Contributors. All rights reserved.
// SPDX-License-Identifier: MIT
//
 
#include "NeonCastWorkload.hpp"
#include "NeonWorkloadUtils.hpp"
 
#include <aclCommon/ArmComputeTensorHandle.hpp>
#include <aclCommon/ArmComputeTensorUtils.hpp>
 
#include <armnn/utility/PolymorphicDowncast.hpp>
 
namespace armnn
{
 
static constexpr arm_compute::ConvertPolicy g_AclConvertPolicy = arm_compute::ConvertPolicy::SATURATE;
 
arm_compute::Status NeonCastValidate(const TensorInfo& input, const TensorInfo& output)
{
    // ACL doesn't have a Boolean type - the armnn Boolean is evaluated as an ACL U8.
    // This causes issues when casting numbers to Boolean, as casting float to U8 truncates decimal points
    // and casting negative signed ints to U8 clamps to 0, but a cast to Boolean returns true for anything non-zero.
    // For example, float to U8 expects 0.1f -> 0u, but float to Boolean 0.1f -> true.
    // ACL isn't aware of the Boolean type, so this check has to be here.
    if(output.GetDataType() == armnn::DataType::Boolean)
    {
        return arm_compute::Status{arm_compute::ErrorCode::RUNTIME_ERROR, "Cast to Boolean unsupported"};
    }
 
    arm_compute::TensorInfo aclInput  = armcomputetensorutils::BuildArmComputeTensorInfo(input);
    arm_compute::TensorInfo aclOutput = armcomputetensorutils::BuildArmComputeTensorInfo(output);
 
    return arm_compute::NECast::validate(&aclInput, &aclOutput, g_AclConvertPolicy);
}
 
NeonCastWorkload::NeonCastWorkload(const CastQueueDescriptor& descriptor, const WorkloadInfo& info)
    : NeonBaseWorkload<CastQueueDescriptor>(descriptor, info)
{
    m_Data.ValidateInputsOutputs("NeonCastWorkload", 1, 1);
 
    arm_compute::ITensor& input  = PolymorphicDowncast<IAclTensorHandle*>(m_Data.m_Inputs[0])->GetTensor();
    arm_compute::ITensor& output = PolymorphicDowncast<IAclTensorHandle*>(m_Data.m_Outputs[0])->GetTensor();
 
    m_CastLayer.configure(&input, &output, g_AclConvertPolicy);
}
 
void NeonCastWorkload::Execute() const
{
    ARMNN_SCOPED_PROFILING_EVENT_NEON_NAME_GUID("NeonCastWorkload_Execute");
    m_CastLayer.run();
}
 
} // namespace armnn