Activation

Enumerations | Functions

Activation

Enumerations
enum	miopenActivationMode_t {   miopenActivationPASTHRU = 0 ,   miopenActivationLOGISTIC = 1 ,   miopenActivationTANH = 2 ,   miopenActivationRELU = 3 ,   miopenActivationSOFTRELU = 4 ,   miopenActivationABS = 5 ,   miopenActivationPOWER = 6 ,   miopenActivationCLIPPEDRELU ,   miopenActivationLEAKYRELU ,   miopenActivationELU }

Functions
	MIOPEN_DECLARE_OBJECT (miopenActivationDescriptor)
	Creates the miopenActivationDescriptor_t type. More...
miopenStatus_t	miopenCreateActivationDescriptor (miopenActivationDescriptor_t *activDesc)
	Creates the Activation descriptor object. More...
miopenStatus_t	miopenSetActivationDescriptor (const miopenActivationDescriptor_t activDesc, miopenActivationMode_t mode, double activAlpha, double activBeta, double activGamma)
	Sets the activation layer descriptor details. More...
miopenStatus_t	miopenGetActivationDescriptor (const miopenActivationDescriptor_t activDesc, miopenActivationMode_t *mode, double *activAlpha, double *activBeta, double *activGamma)
	Gets the activation layer descriptor details. More...
miopenStatus_t	miopenActivationForward (miopenHandle_t handle, const miopenActivationDescriptor_t activDesc, const void *alpha, const miopenTensorDescriptor_t xDesc, const void *x, const void *beta, const miopenTensorDescriptor_t yDesc, void *y)
	Execute an activation forward layer. More...
miopenStatus_t	miopenActivationBackward (miopenHandle_t handle, const miopenActivationDescriptor_t activDesc, const void *alpha, const miopenTensorDescriptor_t yDesc, const void *y, const miopenTensorDescriptor_t dyDesc, const void *dy, const miopenTensorDescriptor_t xDesc, const void *x, const void *beta, const miopenTensorDescriptor_t dxDesc, void *dx)
	Execute a activation backwards layer. More...
miopenStatus_t	miopenDestroyActivationDescriptor (miopenActivationDescriptor_t activDesc)
	Destroys the activation descriptor object. More...

Detailed Description

Enumeration Type Documentation

◆ miopenActivationMode_t

enum miopenActivationMode_t

Activation layer modes

Enumerator
miopenActivationPASTHRU	No activation, pass through the data
miopenActivationLOGISTIC	Sigmoid function: \(1 / (1 + e^{-x})\)
miopenActivationTANH	Tanh activation \( \beta * tanh( \alpha * x) \)
miopenActivationRELU	Rectified Linear Unit \( max(0, x) \)
miopenActivationSOFTRELU	\(log(1 + e^x)\)
miopenActivationABS	Absolute value \(abs(x)\)
miopenActivationPOWER	Scaled and shifted power \((\alpha + \beta * x)^{gamma}\)
miopenActivationCLIPPEDRELU	Clipped Rectified Linear Unit \( min(\alpha, max(0,x)) \)
miopenActivationLEAKYRELU	Leaky Rectified Linear Unit \( \alpha * x | x <= 0; x | x > 0 \)
miopenActivationELU	Exponential Rectified Linear Unit \( \alpha * (e^{x} - 1) | x <= 0; x | x > 0 \)

Examples

/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-miopen/checkouts/latest/include/miopen/miopen.h.

Function Documentation

◆ MIOPEN_DECLARE_OBJECT()

MIOPEN_DECLARE_OBJECT

(

miopenActivationDescriptor

)

Creates the miopenActivationDescriptor_t type.

Activation descriptor is an object that allows the user to specify the activation mode.

◆ miopenActivationBackward()

miopenStatus_t miopenActivationBackward	(	miopenHandle_t	handle,
		const miopenActivationDescriptor_t	activDesc,
		const void *	alpha,
		const miopenTensorDescriptor_t	yDesc,
		const void *	y,
		const miopenTensorDescriptor_t	dyDesc,
		const void *	dy,
		const miopenTensorDescriptor_t	xDesc,
		const void *	x,
		const void *	beta,
		const miopenTensorDescriptor_t	dxDesc,
		void *	dx
	)

Execute a activation backwards layer.

Parameters

handle	MIOpen handle (input)
activDesc	Descriptor for activation layer (input)
alpha	Floating point scaling factor, allocated on the host (input)
yDesc	Tensor descriptor for input data tensor y (input)
y	Data tensor y (input)
dyDesc	Tensor descriptor for input data tensor dy (input)
dy	Data delta tensor dy (input)
xDesc	Tensor descriptor for data input tensor x (input)
x	Data tensor x (input)
beta	Floating point shift factor, allocated on the host (input)
dxDesc	Tensor descriptor for data output tensor dx (input)
dx	Output data delta tensor dx (output)

Returns

miopenStatus_t

Examples

/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-miopen/checkouts/latest/include/miopen/miopen.h.

◆ miopenActivationForward()

miopenStatus_t miopenActivationForward	(	miopenHandle_t	handle,
		const miopenActivationDescriptor_t	activDesc,
		const void *	alpha,
		const miopenTensorDescriptor_t	xDesc,
		const void *	x,
		const void *	beta,
		const miopenTensorDescriptor_t	yDesc,
		void *	y
	)

Execute an activation forward layer.

Parameters

handle	MIOpen handle (input)
activDesc	Descriptor for activation layer (input)
alpha	Floating point scaling factor, allocated on the host (input)
xDesc	Tensor descriptor for data input tensor x (input)
x	Data tensor x (input)
beta	Floating point shift factor, allocated on the host (input)
yDesc	Tensor descriptor for output data tensor y (input)
y	Data tensor y (output)

Returns

miopenStatus_t

Examples

/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-miopen/checkouts/latest/include/miopen/miopen.h.

◆ miopenCreateActivationDescriptor()

miopenStatus_t miopenCreateActivationDescriptor

(

miopenActivationDescriptor_t *

activDesc

)

Creates the Activation descriptor object.

Parameters

activDesc

Pointer to an activation tensor descriptor type

Returns

miopenStatus_t

Examples

/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-miopen/checkouts/latest/include/miopen/miopen.h.

◆ miopenDestroyActivationDescriptor()

miopenStatus_t miopenDestroyActivationDescriptor

(

miopenActivationDescriptor_t

activDesc

)

Destroys the activation descriptor object.

Parameters

activDesc

Activation tensor descriptor type (input)

Returns

miopenStatus_t

Examples

/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-miopen/checkouts/latest/include/miopen/miopen.h.

◆ miopenGetActivationDescriptor()

miopenStatus_t miopenGetActivationDescriptor	(	const miopenActivationDescriptor_t	activDesc,
		miopenActivationMode_t *	mode,
		double *	activAlpha,
		double *	activBeta,
		double *	activGamma
	)

Gets the activation layer descriptor details.

Retrieves all of the descriptor details for the activation layer.

Parameters

activDesc	Pointer to a activation layer descriptor (input)
mode	Activation mode enum (output)
activAlpha	Alpha value for some activation modes (output)
activBeta	Beta value for some activation modes (output)
activGamma	Gamma value for some activation modes (output)

Returns

miopenStatus_t

Examples

/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-miopen/checkouts/latest/include/miopen/miopen.h.

◆ miopenSetActivationDescriptor()

miopenStatus_t miopenSetActivationDescriptor	(	const miopenActivationDescriptor_t	activDesc,
		miopenActivationMode_t	mode,
		double	activAlpha,
		double	activBeta,
		double	activGamma
	)

Sets the activation layer descriptor details.

Sets all of the descriptor details for the activation layer

Parameters

activDesc	Pointer to a activation layer descriptor (output)
mode	Activation mode enum (input)
activAlpha	Alpha value for some activation modes (input)
activBeta	Beta value for some activation modes (input)
activGamma	Gamma value for some activation modes (input)

Returns

miopenStatus_t

Examples

/home/docs/checkouts/readthedocs.org/user_builds/advanced-micro-devices-miopen/checkouts/latest/include/miopen/miopen.h.