DSPLIB_max

Introduction

Kernel for finding maximum value within an input data vector.

• The kernel support computation of vectors of several inputs in one kernel call.

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

Functions
int32_t	DSPLIB_max_getHandleSize (DSPLIB_max_InitArgs *pKerInitArgs)
	This is a query function to calculate the size of internal handle. More...
DSPLIB_STATUS	DSPLIB_max_init (DSPLIB_kernelHandle handle, DSPLIB_bufParams1D_t *bufParamsIn, DSPLIB_bufParams1D_t *bufParamsOut, const DSPLIB_max_InitArgs *pKerInitArgs)
	This function should be called before the DSPLIB_max_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_max_init_checkParams (DSPLIB_kernelHandle handle, const DSPLIB_bufParams1D_t *bufParamsIn, const DSPLIB_bufParams1D_t *bufParamsOut, const DSPLIB_max_InitArgs *pKerInitArgs)
	This function checks the validity of the parameters passed to DSPLIB_max_init function. This function is called with the same parameters as the DSPLIB_max_init, and this function must be called before the DSPLIB_max_init is called. More...
DSPLIB_STATUS	DSPLIB_max_exec_checkParams (DSPLIB_kernelHandle handle, const void *restrict pIn1, const void *restrict pOut)
	This function checks the validity of the parameters passed to DSPLIB_max_exec function. This function is called with the same parameters as the DSPLIB_max_init, and this function must be called before the DSPLIB_max_init is called. More...
DSPLIB_STATUS	DSPLIB_max_exec (DSPLIB_kernelHandle handle, void *restrict pIn, void *restrict pOut)
	This function is the main kernel compute function. More...

Function Documentation

DSPLIB_max_getHandleSize()

int32_t DSPLIB_max_getHandleSize

(

DSPLIB_max_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_max.cpp.

DSPLIB_max_init()

DSPLIB_STATUS DSPLIB_max_init	(	DSPLIB_kernelHandle	handle,
		DSPLIB_bufParams1D_t *	bufParamsIn,
		DSPLIB_bufParams1D_t *	bufParamsOut,
		const DSPLIB_max_InitArgs *	pKerInitArgs
	)

This function should be called before the DSPLIB_max_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 88 of file DSPLIB_max.cpp.

DSPLIB_max_init_checkParams()

DSPLIB_STATUS DSPLIB_max_init_checkParams	(	DSPLIB_kernelHandle	handle,
		const DSPLIB_bufParams1D_t *	bufParamsIn,
		const DSPLIB_bufParams1D_t *	bufParamsOut,
		const DSPLIB_max_InitArgs *	pKerInitArgs
	)

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

DSPLIB_max_exec_checkParams()

DSPLIB_STATUS DSPLIB_max_exec_checkParams	(	DSPLIB_kernelHandle	handle,
		const void *restrict	pIn1,
		const void *restrict	pOut
	)

This function checks the validity of the parameters passed to DSPLIB_max_exec function. This function is called with the same parameters as the DSPLIB_max_init, and this function must be called before the DSPLIB_max_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 71 of file DSPLIB_max.cpp.

DSPLIB_max_exec()

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

This function is the main kernel compute function.

Please refer to details under DSPLIB_max_exec

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.

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_max_init and DSPLIB_max_exec_checkParams functions. This ensures resource configuration and error checks are done only once for several invocations of this function.

Definition at line 185 of file DSPLIB_max.cpp.