hipblaszgeqrf Interface Reference#
hipfort_hipblas::hipblaszgeqrf Interface Reference
SOLVER API. More...
Public Member Functions | |
integer(kind(hipblas_status_success)) function | hipblaszgeqrf_ (handle, m, n, A, lda, ipiv, myInfo) |
integer(kind(hipblas_status_success)) function | hipblaszgeqrf_full_rank (handle, m, n, A, lda, ipiv, myInfo) |
integer(kind(hipblas_status_success)) function | hipblaszgeqrf_rank_0 (handle, m, n, A, lda, ipiv, myInfo) |
integer(kind(hipblas_status_success)) function | hipblaszgeqrf_rank_1 (handle, m, n, A, lda, ipiv, myInfo) |
Detailed Description
SOLVER API.
geqrf computes a QR factorization of a general m-by-n matrix A.
The factorization has the form
\[ A = Q\left[\begin{array}{c} R\newline 0 \end{array}\right] \]
where R is upper triangular (upper trapezoidal if m < n), and Q is a m-by-m orthogonal/unitary matrix represented as the product of Householder matrices
\[ Q = H_1H_2\cdots H_k, \quad \text{with} \: k = \text{min}(m,n) \]
Each Householder matrix \(H_i\) is given by
\[ H_i = I - \text{ipiv}[i] \cdot v_i v_i' \]
where the first i-1 elements of the Householder vector \(v_i\) are zero, and \(v_i[i] = 1\).
- Parameters
-
[in] handle hipblasHandle_t. [in] m int. m >= 0.
The number of rows of the matrix A.[in] n int. n >= 0.
The number of columns of the matrix A.[in,out] A pointer to type. Array on the GPU of dimension lda*n.
On entry, the m-by-n matrix to be factored. On exit, the elements on and above the diagonal contain the factor R; the elements below the diagonal are the last m - i elements of Householder vector v_i.[in] lda int. lda >= m.
Specifies the leading dimension of A.[out] ipiv pointer to type. Array on the GPU of dimension min(m,n).
The Householder scalars.[out] info pointer to a int on the host.
If info = 0, successful exit. If info = j < 0, the j-th argument is invalid.
Member Function/Subroutine Documentation
◆ hipblaszgeqrf_()
integer(kind(hipblas_status_success)) function hipfort_hipblas::hipblaszgeqrf::hipblaszgeqrf_ | ( | type(c_ptr), value | handle, |
integer(c_int), value | m, | ||
integer(c_int), value | n, | ||
type(c_ptr), value | A, | ||
integer(c_int), value | lda, | ||
type(c_ptr), value | ipiv, | ||
type(c_ptr), value | myInfo | ||
) |
◆ hipblaszgeqrf_full_rank()
integer(kind(hipblas_status_success)) function hipfort_hipblas::hipblaszgeqrf::hipblaszgeqrf_full_rank | ( | type(c_ptr) | handle, |
integer(c_int) | m, | ||
integer(c_int) | n, | ||
complex(c_double_complex), dimension(:,:), target | A, | ||
integer(c_int) | lda, | ||
type(c_ptr) | ipiv, | ||
type(c_ptr) | myInfo | ||
) |
◆ hipblaszgeqrf_rank_0()
integer(kind(hipblas_status_success)) function hipfort_hipblas::hipblaszgeqrf::hipblaszgeqrf_rank_0 | ( | type(c_ptr) | handle, |
integer(c_int) | m, | ||
integer(c_int) | n, | ||
complex(c_double_complex), target | A, | ||
integer(c_int) | lda, | ||
type(c_ptr) | ipiv, | ||
type(c_ptr) | myInfo | ||
) |
◆ hipblaszgeqrf_rank_1()
integer(kind(hipblas_status_success)) function hipfort_hipblas::hipblaszgeqrf::hipblaszgeqrf_rank_1 | ( | type(c_ptr) | handle, |
integer(c_int) | m, | ||
integer(c_int) | n, | ||
complex(c_double_complex), dimension(:), target | A, | ||
integer(c_int) | lda, | ||
type(c_ptr) | ipiv, | ||
type(c_ptr) | myInfo | ||
) |
The documentation for this interface was generated from the following file: