HEMV - Hermitian matrix-vector multiplication

Functions
clblasStatus	clblasChemv (clblasOrder order, clblasUplo uplo, size_t N, FloatComplex alpha, const cl_mem A, size_t offa, size_t lda, const cl_mem X, size_t offx, int incx, FloatComplex 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 hermitian matrix and float-complex elements. More...
clblasStatus	clblasZhemv (clblasOrder order, clblasUplo uplo, size_t N, DoubleComplex alpha, const cl_mem A, size_t offa, size_t lda, const cl_mem X, size_t offx, int incx, DoubleComplex 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 hermitian matrix and double-complex elements. More...

Detailed Description

Function Documentation

clblasStatus clblasChemv	(	clblasOrder	order,
		clblasUplo	uplo,
		size_t	N,
		FloatComplex	alpha,
		const cl_mem	A,
		size_t	offa,
		size_t	lda,
		const cl_mem	X,
		size_t	offx,
		int	incx,
		FloatComplex	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 hermitian matrix and float-complex 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 in number of elements for first element in matrix A.
[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;
• clblasNotInitialized if clblasSetup() was not called;
• clblasInvalidValue if invalid parameters are passed:
  • N is zero, or
  • either incx or incy is zero, or
  • any of the leading dimensions is invalid;
  • the matrix sizes or the vector sizes along with the increments lead to accessing outsize of any of the buffers;
• clblasInvalidMemObject if either A, X, or Y object is invalid, or an image object rather than the buffer one;
• clblasOutOfHostMemory if the library can't allocate memory for internal structures;
• clblasInvalidCommandQueue if the passed command queue is invalid;
• clblasInvalidContext if a context a passed command queue belongs to was released;
• clblasInvalidOperation if kernel compilation relating to a previous call has not completed for any of the target devices;
• clblasCompilerNotAvailable if a compiler is not available;
• clblasBuildProgramFailure if there is a failure to build a program executable.

clblasStatus clblasZhemv	(	clblasOrder	order,
		clblasUplo	uplo,
		size_t	N,
		DoubleComplex	alpha,
		const cl_mem	A,
		size_t	offa,
		size_t	lda,
		const cl_mem	X,
		size_t	offx,
		int	incx,
		DoubleComplex	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 hermitian matrix and double-complex 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 in number of elements for first element in matrix A.
[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;
• the same error codes as the clblasChemv() function otherwise.

Examples:

example_zhemv.cpp.