DML_ACTIVATION_PARAMETRIC_SOFTPLUS_OPERATOR_DESC structure (directml.h)

Performs a parametric softplus activation function on every element in InputTensor, placing the result into the corresponding element of OutputTensor.

f(x) = Alpha * ln(1 + exp(Beta * x))

Where exp(x) is the natural exponentiation function, and ln(x) is the natural logarithm.

This operator supports in-place execution, meaning that the output tensor is permitted to alias InputTensor during binding.

Syntax

struct DML_ACTIVATION_PARAMETRIC_SOFTPLUS_OPERATOR_DESC {
  const DML_TENSOR_DESC *InputTensor;
  const DML_TENSOR_DESC *OutputTensor;
  FLOAT                 Alpha;
  FLOAT                 Beta;
};

Members

InputTensor

Type: const DML_TENSOR_DESC*

The input tensor to read from.

OutputTensor

Type: const DML_TENSOR_DESC*

The output tensor to write the results to.

Alpha

Type: FLOAT

The alpha coefficient.

Beta

Type: FLOAT

The beta coefficient.

Availability

This operator was introduced in DML_FEATURE_LEVEL_1_0.

Tensor constraints

InputTensor and OutputTensor must have the same DataType, DimensionCount, and Sizes.

Tensor support

DML_FEATURE_LEVEL_3_0 and above

DML_FEATURE_LEVEL_2_0 and above

DML_FEATURE_LEVEL_1_0 and above

Requirements

See also

DML_ACTIVATION_SOFTPLUS_OPERATOR_DESC