NnapiSupport.txt

------ ArmNN for Android NNAPI supported operations ------

This release of ArmNN for Android supports use as a driver for the Android Neural Networks API. It implements the
android.hardware.neuralnetworks@1.0, android.hardware.neuralnetworks@1.1, android.hardware.neuralnetworks@1.2 and 
android.hardware.neuralnetworks@1.3
HAL interfaces.

For more information on the Android Neural Networks API, see https://developer.android.com/ndk/guides/neuralnetworks/index.html

For integration and usage documentation, please see README.md.

--- Support for Android Neural Networks HAL operations ---

The following AndroidNN HAL 1.0, 1.1, 1.2 and 1.3 operations are currently supported:

AndroidNN operator           Tensor type supported
ABS                          (FLOAT32)
ADD                          (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
ARGMAX                       (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
ARGMIN                       (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
AVERAGE_POOL_2D              (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
BATCH_TO_SPACE_ND            (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
CONCATENATION                (FLOAT32, FLOAT16, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
CONV_2D                      (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
DEPTH_TO_SPACE               (FLOAT32, FLOAT16, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
DEPTHWISE_CONV_2D            (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
DEQUANTIZE                   (FLOAT32 (output only), QUANT8_ASYMM and QUANT8_ASYMM_SIGNED (input only))
DIV                          (FLOAT32, QUANT8_ASYMM)
ELU                          (FLOAT32, QUANT8_ASYMM)
EQUAL                        (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
EXPAND_DIMS                  (FLOAT32, FLOAT16, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
FLOOR                        (FLOAT32)
FULLY_CONNECTED              (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
GREATER                      (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
GREATER_EQUAL                (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
GROUPED_CONV_2D              (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
HARD_SWISH                   (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
INSTANCE_NORMALIZATION       (FLOAT32)
L2_NORMALIZATION             (FLOAT32)
L2_POOL_2D                   (FLOAT32, QUANT8_ASYMM)
LESS                         (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
LESS_EQUAL                   (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
LOCAL_RESPONSE_NORMALIZATION (FLOAT32)
LOGISTIC                     (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
LOG_SOFTMAX                  (FLOAT32)
LSTM                         (FLOAT32)
MAXIMUM                      (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
MAX_POOL_2D                  (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
MEAN                         (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
MINIMUM                      (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
MUL                          (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
NEG                          (FLOAT32)
NOT_EQUAL                    (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
PAD                          (FLOAT32, FLOAT16, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
PAD_V2                       (FLOAT32, FLOAT16, QUANT8_ASYMM)
PRELU                        (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
QUANTIZE                     (FLOAT32 (input only), QUANT8_ASYMM and QUANT8_ASYMM_SIGNED (output only))
QUANTIZED_16BIT_LSTM         (QUANT8_ASYMM)
QUANTIZED_LSTM               (QUANT8_ASYMM)
RELU                         (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
RELU1                        (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
RELU6                        (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
RESHAPE                      (FLOAT32, FLOAT16, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
RESIZE_BILINEAR              (FLOAT32, QUANT8_ASYMM)
RESIZE_NEAREST_NEIGHBOR      (FLOAT32, QUANT8_ASYMM)
RSQRT                        (FLOAT32)
SOFTMAX                      (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
SPACE_TO_BATCH_ND            (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
SPACE_TO_DEPTH               (FLOAT32, FLOAT16, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
SQRT                         (FLOAT32)
SQUEEZE                      (FLOAT32, FLOAT16, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
STRIDED_SLICE                (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
SUB                          (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
TANH                         (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
TRANSPOSE                    (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)
TRANSPOSE_CONV_2D            (FLOAT32, QUANT8_ASYMM, QUANT8_ASYMM_SIGNED)

Where operations are not supported by the ArmNN Android NN Driver, the driver indicates this to the framework
appropriately and the framework implements those operations using a CPU implementation.

NOTE: By convention, only those tensor types have been listed above, which are fully supported across all
ArmNN backends.
    - FLOAT16 input tensors are partially supported on most HAL 1.2 operators on the GpuAcc and
    CpuRef backends, however not on CpuAcc.
    - QUANT8_ASYMM_SIGNED has been added to the list in spite of not being supported in GpuAcc,
    as this data type was added as part of HAL 1.3, which is currently not supported by GpuAcc.