The Barracuda package is deprecated. Use the Sentis package instead.

Supported ONNX operators

Barracuda currently supports the following ONNX operators and parameters. If an operator is not on the list and you need it, please create a ticket on the Unity Barracuda GitHub.

Operations

• Add
• And
• ArgMax
• ArgMin
• AveragePool
• BatchNormalization
• Cast
• Concat
• Constant
• ConstantOfShape
• Conv
• ConvTranspose
• DepthToSpace
• Div
• Dropout
• Equal
• Expand
• Flatten
• Gather
• Gemm
• GlobalAveragePool
• GlobalMaxPool
• Greater
• Identity
• ImageScaler
• InstanceNormalization
• Less
• LessOrEqual
• LRN
• LSTM (ML-Agents models only)
• MatMul
• Max
• MaxPool
• Mean
• Min
• Mul
• Multinomial
• NonMaxSuppression
• NonZero
• Not
• OneHot
• Or
• Pad
• Pow
• RandomNormal
• RandomNormalLike
• RandomUniform
• RandomUniformLike
• ReduceMax
• ReduceMean
• ReduceMin
• ReduceProd
• ReduceSum
• Reshape
• Resize
• Shape
• Slice
• SpaceToDepth
• Split
• Squeeze
• Sub
• Sum
• Tile
• TopK
• Transpose
• Unsqueeze
• Upsample
• Where
• Xor

Activations

• Abs
• Acos
• Acosh
• Asin
• Asinh
• Atan
• Atanh
• Ceil
• Clip
• Cos
• Cosh
• Elu
• Exp
• Floor
• LeakyRelu
• Log
• LogSoftmax
• Neg
• PRelu
• Reciprocal
• Relu
• Round
• Selu
• Sigmoid
• Sin
• Sinh
• Softmax
• Sqrt
• Tan
• Tanh

Operations details

Add

• ONNX specification
  
• Maps to Barracuda op: Add
  

And

• ONNX specification
  
• Maps to Barracuda op: LogicalAnd
  

ArgMax

• ONNX specification
  
• Unsupported attribute: select_last_index
  
• Maps to Barracuda op: Reduce
  

ArgMin

• ONNX specification
  
• Unsupported attribute: select_last_index
  
• Maps to Barracuda op: Reduce
  

AveragePool

• ONNX specification
  
• Unsupported attribute: ceil_mode, count_include_pad
  
• Maps to Barracuda op: AvgPool2D
  
• Notes: No spatial 3D support.
  

BatchNormalization

• ONNX specification
  
• Maps to Barracuda op: ScaleBias
  

Cast

• ONNX specification
  
• Maps to Barracuda op: Identity
  
• Notes: No-op during inference.
  

Concat

• ONNX specification
  
• Maps to Barracuda op: Concat
  
• Notes: GPU path support up to 4D, will fallback to CPU if tensors have more dimensions.
  

Constant

• ONNX specification
  
• Unsupported attribute: sparse_value
  
• Maps to Barracuda op: Const
  

ConstantOfShape

• ONNX specification
  
• Maps to Barracuda op: Const
  

Conv

• ONNX specification
  
• Maps to Barracuda op: DepthwiseConv2D, Conv2D, Conv3D
  
• Notes: Depthwise convolution 3D not supported.
  

ConvTranspose

• ONNX specification
  
• Unsupported attribute: dilatations, group, output_shape
  
• Maps to Barracuda op: Conv2DTrans
  
• Notes: No spatial 3D support.
  

DepthToSpace

• ONNX specification
  
• Maps to Barracuda op: DepthToSpace
  

Div

• ONNX specification
  
• Maps to Barracuda op: Div
  

Dropout

• ONNX specification
  
• Maps to Barracuda op: Identity
  
• Notes: No-op during inference.
  

Equal

• ONNX specification
  
• Maps to Barracuda op: Equal
  

Expand

• ONNX specification
  
• Maps to Barracuda op: Expand
  

Flatten

• ONNX specification
  
• Unsupported attribute: axis
  
• Maps to Barracuda op: Flatten
  

Gather

• ONNX specification
  
• Maps to Barracuda op: Gather
  

Gemm

• ONNX specification
  
• Unsupported attribute: alpha, beta, transA
  
• Maps to Barracuda op: Dense
  

GlobalAveragePool

• ONNX specification
  
• Maps to Barracuda op: GlobalAvgPool2D
  
• Notes: No spatial 3D support.
  

GlobalMaxPool

• ONNX specification
  
• Maps to Barracuda op: GlobalMaxPool2D
  
• Notes: No spatial 3D support.
  

Greater

• ONNX specification
  
• Maps to Barracuda op: Greater
  

Identity

• ONNX specification
  
• Maps to Barracuda op: Identity
  
• Notes: No-op during inference.
  

ImageScaler

• Maps to Barracuda op: ScaleBias
  
• Notes: Was removed from recent ONNX versions.

InstanceNormalization

• ONNX specification
  
• Maps to Barracuda op: Normalization
  
• Notes: Support up to 4D.
  

Less

• ONNX specification
  
• Maps to Barracuda op: Less
  

LessOrEqual

• ONNX specification
  
• Maps to Barracuda op: LessEqual
  

LRN

• ONNX specification
  
• Maps to Barracuda op: LRN
  

LSTM

• ONNX specification
  
• Unsupported attribute: activation_alpha
  
• Unsupported attribute: activation_beta
  
• Unsupported attribute: activations
  
• Unsupported attribute: clip
  
• Unsupported attribute: direction
  
• Unsupported attribute: input_forget
  
• Unsupported attribute: activation_beta
  
• Maps to Barracuda op: LSTM
  
• Notes: Only ML-Agents models are supported.
  See additional information about execution.
  

MatMul

• ONNX specification
  
• Maps to Barracuda op: MatMul, Dense
  

Max

• ONNX specification
  
• Maps to Barracuda op: Max
  

MaxPool

• ONNX specification
  
• Unsupported attribute: ceil_mode, dilatations, storage_order
  
• Maps to Barracuda op: MaxPool2D
  
• Notes: No spatial 3D support.
  

Mean

• ONNX specification
  
• Maps to Barracuda op: Mean
  

Min

• ONNX specification
  
• Maps to Barracuda op: Min
  

Mul

• ONNX specification
  
• Maps to Barracuda op: Mul
  

Multinomial

• ONNX specification
  
• Maps to Barracuda op: Multinomial
  

NonMaxSuppression

• ONNX specification
  
• Maps to Barracuda op: NonMaxSuppression
  

NonZero

• ONNX specification
  
• Maps to Barracuda op: NonZero
  
• Notes: Known bug for non const inputs with at least one dimension of size 1.
  

Not

• ONNX specification
  
• Maps to Barracuda op: LogicalNot
  

OneHot

• ONNX specification
  
• Unsupported attribute: axis
  
• Maps to Barracuda op: Onehot
  
• Notes: Support up to 6D.
  

Or

• ONNX specification
  
• Maps to Barracuda op: LogicalOr
  

Pad

• ONNX specification
  
• Maps to Barracuda op: Border2D, Border3D, Pad2DReflect, Pad2DEdge
  
• Notes: Only 'constant' mode have spatial 3D support.
  

Pow

• ONNX specification
  
• Maps to Barracuda op: Pow
  

RandomNormal

• ONNX specification
  
• Maps to Barracuda op: RandomNormal
  

RandomNormalLike

• ONNX specification
  
• Maps to Barracuda op: RandomNormal
  

RandomUniform

• ONNX specification
  
• Maps to Barracuda op: RandomUniform
  

RandomUniformLike

• ONNX specification
  
• Maps to Barracuda op: RandomUniform
  

ReduceMax

• ONNX specification
  
• Maps to Barracuda op: ReduceMax
  

ReduceMean

• ONNX specification
  
• Maps to Barracuda op: ReduceMean
  

ReduceMin

• ONNX specification
  
• Maps to Barracuda op: ReduceMin
  

ReduceProd

• ONNX specification
  
• Maps to Barracuda op: ReduceProd
  

ReduceSum

• ONNX specification
  
• Maps to Barracuda op: ReduceSum
  

Reshape

• ONNX specification
  
• Maps to Barracuda op: Reshape
  

Resize

• ONNX specification
  
• Unsupported attribute: coordinate_transformation_mode, cubic_coeff_a, exclude_outside, extrapolation_value, nearest_mode
  
• Maps to Barracuda op: Resample2D, Upsample2D, Upsample3D, AvgPool2D
  
• Notes: No spatial 3D downsampling support.
  

Shape

• ONNX specification
  
• Maps to Barracuda op: Const
  
• Notes: Only support constant shapes.
  

Slice

• ONNX specification
  
• Maps to Barracuda op: StridedSlice
  

SpaceToDepth

• ONNX specification
  
• Maps to Barracuda op: SpaceToDepth
  

Split

• ONNX specification
  
• Maps to Barracuda op: StridedSlice
  

Squeeze

• ONNX specification
  
• Maps to Barracuda op: Transpose
  

Sub

• ONNX specification
  
• Maps to Barracuda op: Sub
  

Sum

• ONNX specification
  
• Maps to Barracuda op: Sum
  

Tile

• ONNX specification
  
• Maps to Barracuda op: Tile
  

TopK

• ONNX specification
  
• Maps to Barracuda op: TopKIndices,TopKValues
  
• Notes: Support up to 4D.
  

Transpose

• ONNX specification
  
• Maps to Barracuda op: Transpose
  

Unsqueeze

• ONNX specification
  
• Maps to Barracuda op: Transpose
  

Upsample

• ONNX specification
  
• Maps to Barracuda op: Upsample2D, Upsample3D, AvgPool2D
  
• Notes: No spatial 3D downsampling support.
  

Where

• ONNX specification
  
• Maps to Barracuda op: Where
  

Xor

• ONNX specification
  
• Maps to Barracuda op: LogicalXor
  

Activations details

Abs

• ONNX specification
  
• Maps to Barracuda op: Abs
  

Acos

• ONNX specification
  
• Maps to Barracuda op: Acos
  

Acosh

• ONNX specification
  
• Maps to Barracuda op: Acosh
  

Asin

• ONNX specification
  
• Maps to Barracuda op: Asin
  

Asinh

• ONNX specification
  
• Maps to Barracuda op: Asinh
  

Atan

• ONNX specification
  
• Maps to Barracuda op: Atan
  

Atanh

• ONNX specification
  
• Maps to Barracuda op: Atanh
  

Ceil

• ONNX specification
  
• Maps to Barracuda op: Ceil
  

Clip

• ONNX specification
  
• Maps to Barracuda op: Clip
  

Cos

• ONNX specification
  
• Maps to Barracuda op: Cos
  

Cosh

• ONNX specification
  
• Maps to Barracuda op: Cosh
  

Elu

• ONNX specification
  
• Maps to Barracuda op: Elu
  

Exp

• ONNX specification
  
• Maps to Barracuda op: Exp
  

Floor

• ONNX specification
  
• Maps to Barracuda op: Floor
  

LeakyRelu

• ONNX specification
  
• Maps to Barracuda op: LeykyRelu
  

Log

• ONNX specification
  
• Maps to Barracuda op: Log
  

LogSoftmax

• ONNX specification
  
• Unsupported attribute: axis
  
• Maps to Barracuda op: LogSoftmax
  
• Notes: Support up to 6D.
  

Neg

• ONNX specification
  
• Maps to Barracuda op: Neg
  

PRelu

• ONNX specification
  
• Maps to Barracuda op: PRelu
  

Reciprocal

• ONNX specification
  
• Maps to Barracuda op: Reciprocal
  

Relu

• ONNX specification
  
• Maps to Barracuda op: Relu
  

Round

• ONNX specification
  
• Maps to Barracuda op: Round
  

Selu

• ONNX specification
  
• Maps to Barracuda op: Selu
  

Sigmoid

• ONNX specification
  
• Maps to Barracuda op: Sigmoid
  

Sin

• ONNX specification
  
• Maps to Barracuda op: Sin
  

Sinh

• ONNX specification
  
• Maps to Barracuda op: Sinh
  

Softmax

• ONNX specification
  
• Maps to Barracuda op: Softmax
  
• Notes: Support up to 6D.
  

Sqrt

• ONNX specification
  
• Maps to Barracuda op: Sqrt
  

Tan

• ONNX specification
  
• Maps to Barracuda op: Tan
  

Tanh

• ONNX specification
  
• Maps to Barracuda op: Tanh