rocsolver_sgetf2_batched Interface Reference#
GETF2_BATCHED computes the LU factorization of a batch of general m-by-n matrices using partial pivoting with row interchanges. More...
Public Member Functions | |
integer(kind(rocblas_status_success)) function | rocsolver_sgetf2_batched_ (handle, m, n, A, lda, ipiv, strideP, myInfo, batch_count) |
integer(kind(rocblas_status_success)) function | rocsolver_sgetf2_batched_full_rank (handle, m, n, A, lda, ipiv, strideP, myInfo, batch_count) |
integer(kind(rocblas_status_success)) function | rocsolver_sgetf2_batched_rank_0 (handle, m, n, A, lda, ipiv, strideP, myInfo, batch_count) |
integer(kind(rocblas_status_success)) function | rocsolver_sgetf2_batched_rank_1 (handle, m, n, A, lda, ipiv, strideP, myInfo, batch_count) |
Detailed Description
GETF2_BATCHED computes the LU factorization of a batch of general m-by-n matrices using partial pivoting with row interchanges.
(This is the unblocked Level-2-BLAS version of the algorithm. An optimized internal implementation without rocBLAS calls could be executed with small and mid-size matrices if optimizations are enabled (default option). For more details, see the "Tuning rocSOLVER performance" section of the Library Design Guide).
The factorization of matrix \(A_i\) in the batch has the form
\[ A_i = P_iL_iU_i \]
where \(P_i\) is a permutation matrix, \(L_i\) is lower triangular with unit diagonal elements (lower trapezoidal if m > n), and \(U_i\) is upper triangular (upper trapezoidal if m < n).
- Parameters
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[in] handle rocblas_handle. [in] m rocblas_int. m >= 0.
The number of rows of all matrices A_i in the batch.[in] n rocblas_int. n >= 0.
The number of columns of all matrices A_i in the batch.[in,out] A array of pointers to type. Each pointer points to an array on the GPU of dimension lda*n.
On entry, the m-by-n matrices A_i to be factored. On exit, the factors L_i and U_i from the factorizations. The unit diagonal elements of L_i are not stored.[in] lda rocblas_int. lda >= m.
Specifies the leading dimension of matrices A_i.[out] ipiv pointer to rocblas_int. Array on the GPU (the size depends on the value of strideP).
Contains the vectors of pivot indices ipiv_i (corresponding to A_i). Dimension of ipiv_i is min(m,n). Elements of ipiv_i are 1-based indices. For each instance A_i in the batch and for 1 <= j <= min(m,n), the row j of the matrix A_i was interchanged with row ipiv_i[j]. Matrix P_i of the factorization can be derived from ipiv_i.[in] strideP rocblas_stride.
Stride from the start of one vector ipiv_i to the next one ipiv_(i+1). There is no restriction for the value of strideP. Normal use case is strideP >= min(m,n).[out] info pointer to rocblas_int. Array of batch_count integers on the GPU.
If info[i] = 0, successful exit for factorization of A_i. If info[i] = j > 0, U_i is singular. U_i[j,j] is the first zero pivot.[in] batch_count rocblas_int. batch_count >= 0.
Number of matrices in the batch.
Member Function/Subroutine Documentation
◆ rocsolver_sgetf2_batched_()
integer(kind(rocblas_status_success)) function hipfort_rocsolver::rocsolver_sgetf2_batched::rocsolver_sgetf2_batched_ | ( | type(c_ptr), value | handle, |
integer(c_int), value | m, | ||
integer(c_int), value | n, | ||
type(c_ptr) | A, | ||
integer(c_int), value | lda, | ||
type(c_ptr), value | ipiv, | ||
integer(c_int64_t), value | strideP, | ||
integer(c_int) | myInfo, | ||
integer(c_int), value | batch_count | ||
) |
◆ rocsolver_sgetf2_batched_full_rank()
integer(kind(rocblas_status_success)) function hipfort_rocsolver::rocsolver_sgetf2_batched::rocsolver_sgetf2_batched_full_rank | ( | type(c_ptr) | handle, |
integer(c_int) | m, | ||
integer(c_int) | n, | ||
real(c_float), dimension(:,:,:), target | A, | ||
integer(c_int) | lda, | ||
integer(c_int), dimension(:), target | ipiv, | ||
integer(c_int64_t) | strideP, | ||
integer(c_int) | myInfo, | ||
integer(c_int) | batch_count | ||
) |
◆ rocsolver_sgetf2_batched_rank_0()
integer(kind(rocblas_status_success)) function hipfort_rocsolver::rocsolver_sgetf2_batched::rocsolver_sgetf2_batched_rank_0 | ( | type(c_ptr) | handle, |
integer(c_int) | m, | ||
integer(c_int) | n, | ||
real(c_float), target | A, | ||
integer(c_int) | lda, | ||
integer(c_int), target | ipiv, | ||
integer(c_int64_t) | strideP, | ||
integer(c_int) | myInfo, | ||
integer(c_int) | batch_count | ||
) |
◆ rocsolver_sgetf2_batched_rank_1()
integer(kind(rocblas_status_success)) function hipfort_rocsolver::rocsolver_sgetf2_batched::rocsolver_sgetf2_batched_rank_1 | ( | type(c_ptr) | handle, |
integer(c_int) | m, | ||
integer(c_int) | n, | ||
real(c_float), dimension(:), target | A, | ||
integer(c_int) | lda, | ||
integer(c_int), dimension(:), target | ipiv, | ||
integer(c_int64_t) | strideP, | ||
integer(c_int) | myInfo, | ||
integer(c_int) | batch_count | ||
) |
The documentation for this interface was generated from the following file: