rocsolver_ssterf Interface Reference#
hipfort_rocsolver::rocsolver_ssterf Interface Reference
STERF computes the eigenvalues of a symmetric tridiagonal matrix. More...
Public Member Functions | |
integer(kind(rocblas_status_success)) function | rocsolver_ssterf_ (handle, n, D, E, myInfo) |
integer(kind(rocblas_status_success)) function | rocsolver_ssterf_rank_0 (handle, n, D, E, myInfo) |
integer(kind(rocblas_status_success)) function | rocsolver_ssterf_rank_1 (handle, n, D, E, myInfo) |
Detailed Description
STERF computes the eigenvalues of a symmetric tridiagonal matrix.
The eigenvalues of the symmetric tridiagonal matrix are computed by the Pal-Walker-Kahan variant of the QL/QR algorithm, and returned in increasing order.
The matrix is not represented explicitly, but rather as the array of diagonal elements D and the array of symmetric off-diagonal elements E.
- Parameters
-
[in] handle rocblas_handle. [in] n rocblas_int. n >= 0.
The number of rows and columns of the tridiagonal matrix.[in,out] D pointer to real type. Array on the GPU of dimension n.
On entry, the diagonal elements of the tridiagonal matrix. On exit, if info = 0, the eigenvalues in increasing order. If info > 0, the diagonal elements of a tridiagonal matrix that is similar to the original matrix (i.e. has the same eigenvalues).[in,out] E pointer to real type. Array on the GPU of dimension n-1.
On entry, the off-diagonal elements of the tridiagonal matrix. On exit, if info = 0, this array converges to zero. If info > 0, the off-diagonal elements of a tridiagonal matrix that is similar to the original matrix (i.e. has the same eigenvalues).[out] info pointer to a rocblas_int on the GPU.
If info = 0, successful exit. If info = i > 0, STERF did not converge. i elements of E did not converge to zero.
Member Function/Subroutine Documentation
◆ rocsolver_ssterf_()
integer(kind(rocblas_status_success)) function hipfort_rocsolver::rocsolver_ssterf::rocsolver_ssterf_ | ( | type(c_ptr), value | handle, |
integer(c_int), value | n, | ||
type(c_ptr), value | D, | ||
type(c_ptr), value | E, | ||
integer(c_int) | myInfo | ||
) |
◆ rocsolver_ssterf_rank_0()
integer(kind(rocblas_status_success)) function hipfort_rocsolver::rocsolver_ssterf::rocsolver_ssterf_rank_0 | ( | type(c_ptr) | handle, |
integer(c_int) | n, | ||
real(c_float), target | D, | ||
real(c_float), target | E, | ||
integer(c_int) | myInfo | ||
) |
◆ rocsolver_ssterf_rank_1()
integer(kind(rocblas_status_success)) function hipfort_rocsolver::rocsolver_ssterf::rocsolver_ssterf_rank_1 | ( | type(c_ptr) | handle, |
integer(c_int) | n, | ||
real(c_float), dimension(:), target | D, | ||
real(c_float), dimension(:), target | E, | ||
integer(c_int) | myInfo | ||
) |
The documentation for this interface was generated from the following file: