SYMV - Symmetric matrix-Vector multiplication

Functions
clblasStatus	clblasSsymv (clblasOrder order, clblasUplo uplo, size_t N, cl_float alpha, const cl_mem A, size_t offA, size_t lda, const cl_mem x, size_t offx, int incx, cl_float beta, cl_mem y, size_t offy, int incy, cl_uint numCommandQueues, cl_command_queue *commandQueues, cl_uint numEventsInWaitList, const cl_event *eventWaitList, cl_event *events)
	Matrix-vector product with a symmetric matrix and float elements. More...
clblasStatus	clblasDsymv (clblasOrder order, clblasUplo uplo, size_t N, cl_double alpha, const cl_mem A, size_t offA, size_t lda, const cl_mem x, size_t offx, int incx, cl_double beta, cl_mem y, size_t offy, int incy, cl_uint numCommandQueues, cl_command_queue *commandQueues, cl_uint numEventsInWaitList, const cl_event *eventWaitList, cl_event *events)
	Matrix-vector product with a symmetric matrix and double elements. More...

Detailed Description

Function Documentation

clblasStatus clblasDsymv	(	clblasOrder	order,
		clblasUplo	uplo,
		size_t	N,
		cl_double	alpha,
		const cl_mem	A,
		size_t	offA,
		size_t	lda,
		const cl_mem	x,
		size_t	offx,
		int	incx,
		cl_double	beta,
		cl_mem	y,
		size_t	offy,
		int	incy,
		cl_uint	numCommandQueues,
		cl_command_queue *	commandQueues,
		cl_uint	numEventsInWaitList,
		const cl_event *	eventWaitList,
		cl_event *	events
	)

Matrix-vector product with a symmetric matrix and double elements.

Matrix-vector products:

• \( y \leftarrow \alpha A x + \beta y \)

Parameters

[in]	order	Row/columns order.
[in]	uplo	The triangle in matrix being referenced.
[in]	N	Number of rows and columns in matrix A.
[in]	alpha	The factor of matrix A.
[in]	A	Buffer object storing matrix A.
[in]	offA	Offset of the first element of the matrix A in the buffer object. Counted in elements.
[in]	lda	Leading dimension of matrix A. It cannot less than N.
[in]	x	Buffer object storing vector x.
[in]	offx	Offset of first element of vector x in buffer object. Counted in elements.
[in]	incx	Increment for the elements of vector x. It cannot be zero.
[in]	beta	The factor of vector y.
[out]	y	Buffer object storing vector y.
[in]	offy	Offset of first element of vector y in buffer object. Counted in elements.
[in]	incy	Increment for the elements of vector y. It cannot be zero.
[in]	numCommandQueues	Number of OpenCL command queues in which the task is to be performed.
[in]	commandQueues	OpenCL command queues.
[in]	numEventsInWaitList	Number of events in the event wait list.
[in]	eventWaitList	Event wait list.
[in]	events	Event objects per each command queue that identify a particular kernel execution instance.

Returns

• clblasSuccess on success;
• clblasInvalidDevice if a target device does not support floating point arithmetic with double precision;
• clblasInvalidValue if offA exceeds the size of A buffer object;
• the same error codes as the clblasSsymv() function otherwise.

clblasStatus clblasSsymv	(	clblasOrder	order,
		clblasUplo	uplo,
		size_t	N,
		cl_float	alpha,
		const cl_mem	A,
		size_t	offA,
		size_t	lda,
		const cl_mem	x,
		size_t	offx,
		int	incx,
		cl_float	beta,
		cl_mem	y,
		size_t	offy,
		int	incy,
		cl_uint	numCommandQueues,
		cl_command_queue *	commandQueues,
		cl_uint	numEventsInWaitList,
		const cl_event *	eventWaitList,
		cl_event *	events
	)

Matrix-vector product with a symmetric matrix and float elements.

Matrix-vector products:

• \( y \leftarrow \alpha A x + \beta y \)

Parameters

[in]	order	Row/columns order.
[in]	uplo	The triangle in matrix being referenced.
[in]	N	Number of rows and columns in matrix A.
[in]	alpha	The factor of matrix A.
[in]	A	Buffer object storing matrix A.
[in]	offA	Offset of the first element of the matrix A in the buffer object. Counted in elements.
[in]	lda	Leading dimension of matrix A. It cannot less than N.
[in]	x	Buffer object storing vector x.
[in]	offx	Offset of first element of vector x in buffer object. Counted in elements.
[in]	incx	Increment for the elements of vector x. It cannot be zero.
[in]	beta	The factor of vector y.
[out]	y	Buffer object storing vector y.
[in]	offy	Offset of first element of vector y in buffer object. Counted in elements.
[in]	incy	Increment for the elements of vector y. It cannot be zero.
[in]	numCommandQueues	Number of OpenCL command queues in which the task is to be performed.
[in]	commandQueues	OpenCL command queues.
[in]	numEventsInWaitList	Number of events in the event wait list.
[in]	eventWaitList	Event wait list.
[in]	events	Event objects per each command queue that identify a particular kernel execution instance.

Returns

• clblasSuccess on success;
• clblasInvalidValue if offA exceeds the size of A buffer object;
• the same error codes as the clblasSgemv() function otherwise.

Examples:

example_ssymv.c.