DSPLIB_recip

Introduction

Kernel for computing the reciprocal of input data vector.

• The kernel support computation of vectors of several inputs in one kernel call. Kernel supports float, double and int16_t datatypes.

Data Structures
struct	DSPLIB_recip_InitArgs
	Structure containing the parameters to initialize the kernel. More...

Functions
int32_t	DSPLIB_recip_getHandleSize (DSPLIB_recip_InitArgs *pKerInitArgs)
	This is a query function to calculate the size of internal handle. More...
DSPLIB_STATUS	DSPLIB_recip_init (DSPLIB_kernelHandle handle, DSPLIB_bufParams1D_t *bufParamsIn, DSPLIB_bufParams1D_t *bufParamsOut, const DSPLIB_recip_InitArgs *pKerInitArgs)
	This function should be called before the DSPLIB_recip_exec function is called. This function takes care of any one-time operations such as setting up the configuration of required hardware resources such as the MMA accelerator and the streaming engine. The results of these operations are stored in the handle. More...
DSPLIB_STATUS	DSPLIB_recip_init_checkParams (DSPLIB_kernelHandle handle, const DSPLIB_bufParams1D_t *bufParamsIn, const DSPLIB_bufParams1D_t *bufParamsOut, const DSPLIB_recip_InitArgs *pKerInitArgs)
	This function checks the validity of the parameters passed to DSPLIB_recip_init function. This function is called with the same parameters as the DSPLIB_recip_init, and this function must be called before the DSPLIB_recip_init is called. More...
DSPLIB_STATUS	DSPLIB_recip_exec_checkParams (DSPLIB_kernelHandle handle, const void *restrict pIn, const void *restrict pOut)
	This function checks the validity of the parameters passed to DSPLIB_recip_exec function. This function is called with the same parameters as the DSPLIB_recip_init, and this function must be called before the DSPLIB_recip_init is called. More...
DSPLIB_STATUS	DSPLIB_recip_exec (DSPLIB_kernelHandle handle, void *restrict pIn, void *restrict pOut)
	This function is the main kernel compute function. More...

Enumerations
enum	DSPLIB_recip_storeStyle { DSPLIB_LINEAR_ST = 0 , DSPLIB_HSTACK_ST = 1 , DSPLIB_INTERLEAVE_ST = 2 }
	enumeration to determine store style of the fixed point More...

Enumeration Type Documentation

DSPLIB_recip_storeStyle

enum DSPLIB_recip_storeStyle

enumeration to determine store style of the fixed point

Enumerator
DSPLIB_LINEAR_ST	input is floating point, so store pattern is linear.
DSPLIB_HSTACK_ST	input is fixed point, store pattern is horizontal stack.
DSPLIB_INTERLEAVE_ST	input is fixed point, store pattern is interleaved.

Definition at line 106 of file DSPLIB_recip.h.

Function Documentation

DSPLIB_recip_getHandleSize()

int32_t DSPLIB_recip_getHandleSize

(

DSPLIB_recip_InitArgs *

pKerInitArgs

)

This is a query function to calculate the size of internal handle.

Parameters

[in]

pKerInitArgs

: Pointer to structure holding init parameters

Returns

Size of the buffer in bytes

Remarks

Application is expected to allocate buffer of the requested size and provide it as input to other functions requiring it.

Definition at line 25 of file DSPLIB_recip.cpp.

DSPLIB_recip_init()

DSPLIB_STATUS DSPLIB_recip_init	(	DSPLIB_kernelHandle	handle,
		DSPLIB_bufParams1D_t *	bufParamsIn,
		DSPLIB_bufParams1D_t *	bufParamsOut,
		const DSPLIB_recip_InitArgs *	pKerInitArgs
	)

This function should be called before the DSPLIB_recip_exec function is called. This function takes care of any one-time operations such as setting up the configuration of required hardware resources such as the MMA accelerator and the streaming engine. The results of these operations are stored in the handle.

Parameters

[in]	handle	: Active handle to the kernel
[in]	bufParamsIn	: Pointer to the structure containing dimensional information of input buffer
[out]	bufParamsOut	: Pointer to the structure containing dimensional information of ouput buffer
[in]	pKerInitArgs	: Pointer to the structure holding init parameters

Returns

Status value indicating success or failure. Refer to DSPLIB_STATUS.

Remarks

Application is expected to provide a valid handle.

Definition at line 82 of file DSPLIB_recip.cpp.

DSPLIB_recip_init_checkParams()

DSPLIB_STATUS DSPLIB_recip_init_checkParams	(	DSPLIB_kernelHandle	handle,
		const DSPLIB_bufParams1D_t *	bufParamsIn,
		const DSPLIB_bufParams1D_t *	bufParamsOut,
		const DSPLIB_recip_InitArgs *	pKerInitArgs
	)

This function checks the validity of the parameters passed to DSPLIB_recip_init function. This function is called with the same parameters as the DSPLIB_recip_init, and this function must be called before the DSPLIB_recip_init is called.

Parameters

[in]	handle	: Active handle to the kernel
[in]	bufParamsIn	: Pointer to the structure containing dimensional information of input buffer
[out]	bufParamsOut	: Pointer to the structure containing dimensional information of output buffer
[in]	pKerInitArgs	: Pointer to the structure holding init parameters

Returns

Status value indicating success or failure. Refer to DSPLIB_STATUS.

Remarks

None

Definition at line 31 of file DSPLIB_recip.cpp.

DSPLIB_recip_exec_checkParams()

DSPLIB_STATUS DSPLIB_recip_exec_checkParams	(	DSPLIB_kernelHandle	handle,
		const void *restrict	pIn,
		const void *restrict	pOut
	)

This function checks the validity of the parameters passed to DSPLIB_recip_exec function. This function is called with the same parameters as the DSPLIB_recip_init, and this function must be called before the DSPLIB_recip_init is called.

Parameters

[in]	handle	: Active handle to the kernel
[in]	pIn	: Pointer to the structure input buffer
[out]	pout	: Pointer to the output buffer

Returns

Status value indicating success or failure. Refer to DSPLIB_STATUS.

Remarks

None

Definition at line 65 of file DSPLIB_recip.cpp.

DSPLIB_recip_exec()

DSPLIB_STATUS DSPLIB_recip_exec	(	DSPLIB_kernelHandle	handle,
		void *restrict	pIn,
		void *restrict	pOut
	)

This function is the main kernel compute function.

Please refer to details under DSPLIB_recip_exec

Parameters

[in]	handle	: Active handle to the kernel
[in]	pIn	: Pointer to buffer holding the input data
[out]	pOut	: Pointer to buffer holding the output data

Returns

Status value indicating success or failure. Refer to DSPLIB_STATUS.

Assumptions:

• None

Performance Considerations:

For best performance,

• the input and output data buffers are expected to be in L2 memory
• the buffer pointers are assumed to be 64-byte aligned

Remarks

Before calling this function, application is expected to call DSPLIB_recip_init and DSPLIB_recip_exec_checkParams functions. This ensures resource configuration and error checks are done only once for several invocations of this function.

Definition at line 148 of file DSPLIB_recip.cpp.