rocsolver_ssyevd Interface Reference

• hipfort_rocsolver
• rocsolver_ssyevd

Public Member Functions | List of all members

hipfort_rocsolver::rocsolver_ssyevd Interface Reference

SYEVD computes the eigenvalues and optionally the eigenvectors of a real symmetric matrix A. More...

Public Member Functions
integer(kind(rocblas_status_success)) function	rocsolver_ssyevd_ (handle, evect, uplo, n, A, lda, D, E, myInfo)
integer(kind(rocblas_status_success)) function	rocsolver_ssyevd_full_rank (handle, evect, uplo, n, A, lda, D, E, myInfo)
integer(kind(rocblas_status_success)) function	rocsolver_ssyevd_rank_0 (handle, evect, uplo, n, A, lda, D, E, myInfo)
integer(kind(rocblas_status_success)) function	rocsolver_ssyevd_rank_1 (handle, evect, uplo, n, A, lda, D, E, myInfo)

Detailed Description

SYEVD computes the eigenvalues and optionally the eigenvectors of a real symmetric matrix A.

The eigenvalues are returned in ascending order. The eigenvectors are computed using a divide-and-conquer algorithm, depending on the value of evect. The computed eigenvectors are orthonormal.

Parameters

[in]	handle	rocblas_handle.
[in]	evect	rocblas_evect. Specifies whether the eigenvectors are to be computed. If evect is rocblas_evect_original, then the eigenvectors are computed. rocblas_evect_tridiagonal is not supported.
[in]	uplo	rocblas_fill. Specifies whether the upper or lower part of the symmetric matrix A is stored. If uplo indicates lower (or upper), then the upper (or lower) part of A is not used.
[in]	n	rocblas_int. n >= 0. Number of rows and columns of matrix A.
[in,out]	A	pointer to type. Array on the GPU of dimension lda*n. On entry, the matrix A. On exit, the eigenvectors of A if they were computed and the algorithm converged; otherwise the contents of A are destroyed.
[in]	lda	rocblas_int. lda >= n. Specifies the leading dimension of matrix A.
[out]	D	pointer to type. Array on the GPU of dimension n. The eigenvalues of A in increasing order.
[out]	E	pointer to type. Array on the GPU of dimension n. This array is used to work internally with the tridiagonal matrix T associated with A. On exit, if info > 0, it contains the unconverged off-diagonal elements of T (or properly speaking, a tridiagonal matrix equivalent to T). The diagonal elements of this matrix are in D; those that converged correspond to a subset of the eigenvalues of A (not necessarily ordered).
[out]	info	pointer to a rocblas_int on the GPU. If info = 0, successful exit. If info = i > 0 and evect is rocblas_evect_none, the algorithm did not converge. i elements of E did not converge to zero. If info = i > 0 and evect is rocblas_evect_original, the algorithm failed to compute an eigenvalue in the submatrix from [i/(n+1), i/(n+1)] to [i%(n+1), i%(n+1)].

Member Function/Subroutine Documentation

◆ rocsolver_ssyevd_()

integer(kind(rocblas_status_success)) function hipfort_rocsolver::rocsolver_ssyevd::rocsolver_ssyevd_	(	type(c_ptr), value	handle,
		integer(kind(rocblas_evect_original)), value	evect,
		integer(kind(rocblas_fill_upper)), value	uplo,
		integer(c_int), value	n,
		type(c_ptr), value	A,
		integer(c_int), value	lda,
		type(c_ptr), value	D,
		type(c_ptr), value	E,
		integer(c_int)	myInfo
	)

◆ rocsolver_ssyevd_full_rank()

integer(kind(rocblas_status_success)) function hipfort_rocsolver::rocsolver_ssyevd::rocsolver_ssyevd_full_rank	(	type(c_ptr)	handle,
		integer(kind(rocblas_evect_original))	evect,
		integer(kind(rocblas_fill_upper))	uplo,
		integer(c_int)	n,
		real(c_float), dimension(:,:), target	A,
		integer(c_int)	lda,
		real(c_float), dimension(:), target	D,
		real(c_float), dimension(:), target	E,
		integer(c_int)	myInfo
	)

◆ rocsolver_ssyevd_rank_0()

integer(kind(rocblas_status_success)) function hipfort_rocsolver::rocsolver_ssyevd::rocsolver_ssyevd_rank_0	(	type(c_ptr)	handle,
		integer(kind(rocblas_evect_original))	evect,
		integer(kind(rocblas_fill_upper))	uplo,
		integer(c_int)	n,
		real(c_float), target	A,
		integer(c_int)	lda,
		real(c_float), target	D,
		real(c_float), target	E,
		integer(c_int)	myInfo
	)

◆ rocsolver_ssyevd_rank_1()

integer(kind(rocblas_status_success)) function hipfort_rocsolver::rocsolver_ssyevd::rocsolver_ssyevd_rank_1	(	type(c_ptr)	handle,
		integer(kind(rocblas_evect_original))	evect,
		integer(kind(rocblas_fill_upper))	uplo,
		integer(c_int)	n,
		real(c_float), dimension(:), target	A,
		integer(c_int)	lda,
		real(c_float), dimension(:), target	D,
		real(c_float), dimension(:), target	E,
		integer(c_int)	myInfo
	)

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The documentation for this interface was generated from the following file:

• hipfort_rocsolver.f