double precision

Functions
magma_int_t	magma_dresidual (magma_d_matrix A, magma_d_matrix b, magma_d_matrix x, double *res, magma_queue_t queue)
	Computes the residual ||b-Ax|| for a solution approximation x. More...
magma_int_t	magma_dresidual_slice (magma_int_t start, magma_int_t end, magma_d_matrix A, magma_d_matrix b, magma_d_matrix x, double *res, magma_queue_t queue)
	Computes the residual r=||b-Ax|| for the slice r(start:end) for a solution approximation x. More...
magma_int_t	magma_dresidualvec (magma_d_matrix A, magma_d_matrix b, magma_d_matrix x, magma_d_matrix *r, double *res, magma_queue_t queue)
	Computes the residual r = b-Ax for a solution approximation x. More...
magma_int_t	magma_d_precond (magma_d_matrix A, magma_d_matrix b, magma_d_matrix *x, magma_d_preconditioner *precond, magma_queue_t queue)
	For a given input matrix A and vectors x, y and the preconditioner parameters, the respective preconditioner is chosen. More...
magma_int_t	magma_d_precondsetup (magma_d_matrix A, magma_d_matrix b, magma_d_solver_par *solver, magma_d_preconditioner *precond, magma_queue_t queue)
	For a given input matrix M and vectors x, y and the preconditioner parameters, the respective preconditioner is preprocessed. More...
magma_int_t	magma_d_applyprecond (magma_d_matrix A, magma_d_matrix b, magma_d_matrix *x, magma_d_preconditioner *precond, magma_queue_t queue)
	For a given input matrix A and vectors x, y and the preconditioner parameters, the respective preconditioner is applied. More...
magma_int_t	magma_d_applyprecond_left (magma_trans_t trans, magma_d_matrix A, magma_d_matrix b, magma_d_matrix *x, magma_d_preconditioner *precond, magma_queue_t queue)
	For a given input matrix A and vectors x, y and the preconditioner parameters, the respective left preconditioner is applied. More...
magma_int_t	magma_d_applyprecond_right (magma_trans_t trans, magma_d_matrix A, magma_d_matrix b, magma_d_matrix *x, magma_d_preconditioner *precond, magma_queue_t queue)
	For a given input matrix A and vectors x, y and the preconditioner parameters, the respective right-preconditioner is applied. More...
magma_int_t	magma_d_solver (magma_d_matrix A, magma_d_matrix b, magma_d_matrix *x, magma_dopts *zopts, magma_queue_t queue)
	This is an interface that allows to use any iterative solver on the linear system Ax = b. More...
magma_int_t	magma_dapplycustomprecond_l (magma_d_matrix b, magma_d_matrix *x, magma_d_preconditioner *precond, magma_queue_t queue)
	This is an interface to the left solve for any custom preconditioner. More...
magma_int_t	magma_dapplycustomprecond_r (magma_d_matrix b, magma_d_matrix *x, magma_d_preconditioner *precond, magma_queue_t queue)
	This is an interface to the right solve for any custom preconditioner. More...
magma_int_t	magma_dcsrsplit (magma_int_t offset, magma_int_t bsize, magma_d_matrix A, magma_d_matrix *D, magma_d_matrix *R, magma_queue_t queue)
	Splits a CSR matrix into two matrices, one containing the diagonal blocks with the diagonal element stored first, one containing the rest of the original matrix. More...
magma_int_t	magma_ddomainoverlap (magma_index_t num_rows, magma_int_t *num_indices, magma_index_t *rowptr, magma_index_t *colidx, magma_index_t *x, magma_queue_t queue)
	Generates the update list. More...
magma_int_t	magma_dmfree (magma_d_matrix *A, magma_queue_t queue)
	Free the memory of a magma_d_matrix. More...
magma_int_t	magma_dprecondfree (magma_d_preconditioner *precond_par, magma_queue_t queue)
	Free a preconditioner. More...
magma_int_t	magma_dmprepare_batched (magma_uplo_t uplotype, magma_trans_t transtype, magma_diag_t diagtype, magma_d_matrix L, magma_d_matrix LC, magma_index_t *sizes, magma_index_t *locations, double *trisystems, double *rhs, magma_queue_t queue)
	Takes a sparse matrix and generates an array containing the sizes of the different systems an array containing the indices with the locations in the sparse matrix where the data comes from and goes back to an array containing all the sparse triangular systems. More...
magma_int_t	magma_dmtrisolve_batched (magma_uplo_t uplotype, magma_trans_t transtype, magma_diag_t diagtype, magma_d_matrix L, magma_d_matrix LC, magma_index_t *sizes, magma_index_t *locations, double *trisystems, double *rhs, magma_queue_t queue)
	Does all triangular solves. More...
magma_int_t	magma_dmbackinsert_batched (magma_uplo_t uplotype, magma_trans_t transtype, magma_diag_t diagtype, magma_d_matrix *M, magma_index_t *sizes, magma_index_t *locations, double *trisystems, double *rhs, magma_queue_t queue)
	Inserts the values into the preconditioner matrix. More...
magma_int_t	magma_dmiluspai_sizecheck (magma_d_matrix A, magma_index_t batchsize, magma_index_t *maxsize, magma_queue_t queue)
	Checks for a matrix whether the batched ISAI works for a given thread-block size. More...
magma_int_t	magma_dmisai_blockstruct (magma_int_t n, magma_int_t bs, magma_int_t offs, magma_uplo_t uplotype, magma_d_matrix *A, magma_queue_t queue)
	Generates a block-diagonal sparsity pattern with block-size bs. More...
magma_int_t	magma_dmatrix_cup (magma_d_matrix A, magma_d_matrix B, magma_d_matrix *U, magma_queue_t queue)
	Generates a matrix U = A B. More...
magma_int_t	magma_dmatrix_cap (magma_d_matrix A, magma_d_matrix B, magma_d_matrix *U, magma_queue_t queue)
	Generates a matrix with entries being in both matrices: U = A B. More...
magma_int_t	magma_dmatrix_negcap (magma_d_matrix A, magma_d_matrix B, magma_d_matrix *U, magma_queue_t queue)
	Generates a list of matrix entries being part of A but not of B. More...
magma_int_t	magma_dmatrix_tril_negcap (magma_d_matrix A, magma_d_matrix B, magma_d_matrix *U, magma_queue_t queue)
	Generates a list of matrix entries being part of tril(A) but not of B. More...
magma_int_t	magma_dmatrix_triu_negcap (magma_d_matrix A, magma_d_matrix B, magma_d_matrix *U, magma_queue_t queue)
	Generates a matrix with entries being part of triu(A) but not of B. More...
magma_int_t	magma_dmatrix_addrowindex (magma_d_matrix *A, magma_queue_t queue)
	Adds to a CSR matrix an array containing the rowindexes. More...
magma_int_t	magma_dcsrcoo_transpose (magma_d_matrix A, magma_d_matrix *B, magma_queue_t queue)
	Transposes a matrix that already contains rowidx. More...
magma_int_t	magma_dmatrix_createrowptr (magma_int_t n, magma_index_t *row, magma_queue_t queue)
	This function generates a rowpointer out of a row-wise element count in parallel. More...
magma_int_t	magma_dmatrix_swap (magma_d_matrix *A, magma_d_matrix *B, magma_queue_t queue)
	Swaps two matrices. More...
magma_int_t	magma_dmatrix_tril (magma_d_matrix A, magma_d_matrix *L, magma_queue_t queue)
	Extracts the lower triangular of a matrix: L = tril(A). More...
magma_int_t	magma_dmatrix_triu (magma_d_matrix A, magma_d_matrix *U, magma_queue_t queue)
	Extracts the lower triangular of a matrix: U = triu(A). More...
magma_int_t	magma_dmatrix_abssum (magma_d_matrix A, double *sum, magma_queue_t queue)
	Computes the sum of the absolute values in a matrix. More...
magma_int_t	magma_dcsr_sort (magma_d_matrix *A, magma_queue_t queue)
	SOrts the elements in a CSR matrix for increasing column index. More...
magma_int_t	magma_drowentries (magma_d_matrix *A, magma_queue_t queue)
	Checks the maximal number of nonzeros in a row of matrix A. More...
magma_int_t	magma_ddiameter (magma_d_matrix *A, magma_queue_t queue)
	Computes the diameter of a sparse matrix and stores the value in diameter. More...
magma_int_t	magma_d_csr_compressor (double **val, magma_index_t **row, magma_index_t **col, double **valn, magma_index_t **rown, magma_index_t **coln, magma_int_t *n, magma_queue_t queue)
	Helper function to compress CSR containing zero-entries. More...
magma_int_t	magma_dmconvert (magma_d_matrix A, magma_d_matrix *B, magma_storage_t old_format, magma_storage_t new_format, magma_queue_t queue)
	Converter between different sparse storage formats. More...
magma_int_t	magma_dmcsrcompressor (magma_d_matrix *A, magma_queue_t queue)
	Removes zeros in a CSR matrix. More...
magma_int_t	magma_dcsrset (magma_int_t m, magma_int_t n, magma_index_t *row, magma_index_t *col, double *val, magma_d_matrix *A, magma_queue_t queue)
	Passes a CSR matrix to MAGMA. More...
magma_int_t	magma_dcsrget (magma_d_matrix A, magma_int_t *m, magma_int_t *n, magma_index_t **row, magma_index_t **col, double **val, magma_queue_t queue)
	Passes a MAGMA matrix to CSR structure. More...
magma_int_t	magma_dcsrset_gpu (magma_int_t m, magma_int_t n, magmaIndex_ptr row, magmaIndex_ptr col, magmaDouble_ptr val, magma_d_matrix *A, magma_queue_t queue)
	Passes a CSR matrix to MAGMA (located on DEV). More...
magma_int_t	magma_dcsrget_gpu (magma_d_matrix A, magma_int_t *m, magma_int_t *n, magmaIndex_ptr *row, magmaIndex_ptr *col, magmaDouble_ptr *val, magma_queue_t queue)
	Passes a MAGMA matrix to CSR structure (located on DEV). More...
magma_int_t	magma_dmdiagdom (magma_d_matrix M, double *min_dd, double *max_dd, double *avg_dd, magma_queue_t queue)
	This routine takes a CSR matrix and computes the average diagonal dominance. More...
magma_int_t	magma_dmbdiagdom (magma_d_matrix M, magma_d_matrix blocksizes, double *min_dd, double *max_dd, double *avg_dd, magma_queue_t queue)
	This routine takes a CSR matrix and computes the average block-diagonal dominance. More...
magma_int_t	magma_dmdiff (magma_d_matrix A, magma_d_matrix B, real_Double_t *res, magma_queue_t queue)
	Computes the Frobenius norm of the difference between the CSR matrices A and B. More...
magma_int_t	magma_dmfrobenius (magma_d_matrix A, magma_d_matrix B, magma_d_matrix S, double *norm, magma_queue_t queue)
	Computes the Frobenius norm || A - B ||_S on the sparsity pattern of S. More...
magma_int_t	magma_dmgenerator (magma_int_t n, magma_int_t offdiags, magma_index_t *diag_offset, double *diag_vals, magma_d_matrix *A, magma_queue_t queue)
	Generate a symmetric n x n CSR matrix for a stencil. More...
magma_int_t	magma_dm_27stencil (magma_int_t n, magma_d_matrix *A, magma_queue_t queue)
	Generate a 27-point stencil for a 3D FD discretization. More...
magma_int_t	magma_dm_5stencil (magma_int_t n, magma_d_matrix *A, magma_queue_t queue)
	Generate a 5-point stencil for a 2D FD discretization. More...
magma_int_t	magma_dsymbilu (magma_d_matrix *A, magma_int_t levels, magma_d_matrix *L, magma_d_matrix *U, magma_queue_t queue)
	This routine performs a symbolic ILU factorization. More...
magma_int_t	read_d_csr_from_mtx (magma_storage_t *type, magma_location_t *location, magma_int_t *n_row, magma_int_t *n_col, magma_int_t *nnz, double **val, magma_index_t **row, magma_index_t **col, const char *filename, magma_queue_t queue)
	Reads in a matrix stored in coo format from a Matrix Market (.mtx) file and converts it into CSR format. More...
magma_int_t	magma_dwrite_csr_mtx (magma_d_matrix A, magma_order_t MajorType, const char *filename, magma_queue_t queue)
	Writes a CSR matrix to a file using Matrix Market format. More...
magma_int_t	magma_dprint_csr_mtx (magma_int_t n_row, magma_int_t n_col, magma_int_t nnz, double **val, magma_index_t **row, magma_index_t **col, magma_order_t MajorType, magma_queue_t queue)
	Prints a CSR matrix in Matrix Market format. More...
magma_int_t	magma_dprint_csr (magma_int_t n_row, magma_int_t n_col, magma_int_t nnz, double **val, magma_index_t **row, magma_index_t **col, magma_queue_t queue)
	Prints a CSR matrix in CSR format. More...
magma_int_t	magma_dprint_matrix (magma_d_matrix A, magma_queue_t queue)
	Prints a sparse matrix in CSR format. More...
magma_int_t	magma_d_csr_mtx (magma_d_matrix *A, const char *filename, magma_queue_t queue)
	Reads in a matrix stored in coo format from a Matrix Market (.mtx) file and converts it into CSR format. More...
magma_int_t	magma_d_csr_mtxsymm (magma_d_matrix *A, const char *filename, magma_queue_t queue)
	Reads in a SYMMETRIC matrix stored in coo format from a Matrix Market (.mtx) file and converts it into CSR format. More...
magma_int_t	magma_dmlumerge (magma_d_matrix L, magma_d_matrix U, magma_d_matrix *A, magma_queue_t queue)
	Takes an strictly lower triangular matrix L and an upper triangular matrix U and merges them into a matrix A containing the upper and lower triangular parts. More...
magma_int_t	magma_dmscale (magma_d_matrix *A, magma_scale_t scaling, magma_queue_t queue)
	Scales a matrix. More...
magma_int_t	magma_dmscale_matrix_rhs (magma_d_matrix *A, magma_d_matrix *b, magma_d_matrix *scaling_factors, magma_scale_t scaling, magma_queue_t queue)
	Scales a matrix and a right hand side vector of a Ax = b system. More...
magma_int_t	magma_dmdiagadd (magma_d_matrix *A, double add, magma_queue_t queue)
	Adds a multiple of the Identity matrix to a matrix: A = A+add * I. More...
magma_int_t	magma_dmscale_generate (magma_int_t n, magma_scale_t *scaling, magma_side_t *side, magma_d_matrix *A, magma_d_matrix *scaling_factors, magma_queue_t queue)
	Generates n vectors of scaling factors from the A matrix and stores them in the factors matrix as column vectors in column major ordering. More...
magma_int_t	magma_dmscale_apply (magma_int_t n, magma_side_t *side, magma_d_matrix *scaling_factors, magma_d_matrix *A, magma_queue_t queue)
	Applies n diagonal scaling matrices to a matrix A; n=[1,2], factor[i] is applied to side[i] of the matrix. More...
magma_int_t	magma_ddimv (magma_d_matrix *vecA, magma_d_matrix *vecB, magma_queue_t queue)
	Multiplies a diagonal matrix (vecA) and a vector (vecB). More...
magma_int_t	magma_dmshrink (magma_d_matrix A, magma_d_matrix *B, magma_queue_t queue)
	Shrinks a non-square matrix (m < n) to the smaller dimension. More...
magma_int_t	magma_dmslice (magma_int_t num_slices, magma_int_t slice, magma_d_matrix A, magma_d_matrix *B, magma_d_matrix *ALOC, magma_d_matrix *ANLOC, magma_index_t *comm_i, double *comm_v, magma_int_t *start, magma_int_t *end, magma_queue_t queue)
	Takes a matrix and extracts a slice for solving the system in parallel: More...
magma_int_t	magma_dmsupernodal (magma_int_t *max_bs, magma_d_matrix A, magma_d_matrix *S, magma_queue_t queue)
	Generates a block-diagonal sparsity pattern with block-size bs. More...
magma_int_t	magma_dmvarsizeblockstruct (magma_int_t n, magma_int_t *bs, magma_int_t bsl, magma_uplo_t uplotype, magma_d_matrix *A, magma_queue_t queue)
	Generates a block-diagonal sparsity pattern with variable block-size. More...
magma_int_t	magma_dmtransfer (magma_d_matrix A, magma_d_matrix *B, magma_location_t src, magma_location_t dst, magma_queue_t queue)
	Copies a matrix from memory location src to memory location dst. More...
magma_int_t	d_transpose_csr (magma_int_t n_rows, magma_int_t n_cols, magma_int_t nnz, double *values, magma_index_t *rowptr, magma_index_t *colind, magma_int_t *new_n_rows, magma_int_t *new_n_cols, magma_int_t *new_nnz, double **new_values, magma_index_t **new_rowptr, magma_index_t **new_colind, magma_queue_t queue)
	Transposes a matrix stored in CSR format on the CPU host. More...
magma_int_t	magma_dmtranspose (magma_d_matrix A, magma_d_matrix *B, magma_queue_t queue)
	Interface to cuSPARSE transpose. More...
magma_int_t	magma_d_cucsrtranspose (magma_d_matrix A, magma_d_matrix *B, magma_queue_t queue)
	Helper function to transpose CSR matrix. More...
magma_int_t	magma_dmtransposeconjugate (magma_d_matrix A, magma_d_matrix *B, magma_queue_t queue)
	This function forms the transpose conjugate of a matrix. More...
magma_int_t	magma_dmtranspose_cpu (magma_d_matrix A, magma_d_matrix *B, magma_queue_t queue)
	Generates a transpose of A on the CPU. More...
magma_int_t	magma_dmtransposeconj_cpu (magma_d_matrix A, magma_d_matrix *B, magma_queue_t queue)
	Generates a transpose conjugate of A on the CPU. More...
magma_int_t	magma_dmtransposestruct_cpu (magma_d_matrix A, magma_d_matrix *B, magma_queue_t queue)
	Generates a transpose of the nonzero pattern of A on the CPU. More...
magma_int_t	magma_dmtransposeabs_cpu (magma_d_matrix A, magma_d_matrix *B, magma_queue_t queue)
	Generates a transpose with absolute values of A on the CPU. More...
magma_int_t	magma_dparic_sweep (magma_d_matrix A, magma_d_matrix *L, magma_queue_t queue)
	This function does one asynchronous ParILU sweep (symmetric case). More...
magma_int_t	magma_dparic_sweep_sync (magma_d_matrix A, magma_d_matrix *L, magma_queue_t queue)
	This function does one synchronized ParILU sweep (symmetric case). More...
magma_int_t	magma_dparict_candidates (magma_d_matrix L0, magma_d_matrix L, magma_d_matrix LT, magma_d_matrix *L_new, magma_queue_t queue)
	This function identifies the candidates like they appear as ILU1 fill-in. More...
magma_int_t	magma_dparict_sweep_sync (magma_d_matrix *A, magma_d_matrix *L, magma_queue_t queue)
	This function does one synchronized ParILU sweep. More...
magma_int_t	magma_dparilu_sweep (magma_d_matrix A, magma_d_matrix *L, magma_d_matrix *U, magma_queue_t queue)
	This function does one asynchronous ParILU sweep. More...
magma_int_t	magma_dparilu_sweep_sync (magma_d_matrix A, magma_d_matrix *L, magma_d_matrix *U, magma_queue_t queue)
	This function does one synchronized ParILU sweep. More...
magma_int_t	magma_dparilut_sweep (magma_d_matrix *A, magma_d_matrix *L, magma_d_matrix *U, magma_queue_t queue)
	This function does an ParILUT sweep. More...
magma_int_t	magma_dparilut_sweep_sync (magma_d_matrix *A, magma_d_matrix *L, magma_d_matrix *U, magma_queue_t queue)
	This function does an ParILUT sweep. More...
magma_int_t	magma_dparilut_residuals (magma_d_matrix A, magma_d_matrix L, magma_d_matrix U, magma_d_matrix *R, magma_queue_t queue)
	This function computes the ILU residual in the locations included in the sparsity pattern of R. More...
magma_int_t	magma_dparilut_thrsrm (magma_int_t order, magma_d_matrix *A, double *thrs, magma_queue_t queue)
	Removes any element with absolute value smaller equal or larger equal thrs from the matrix and compacts the whole thing. More...
magma_int_t	magma_dparilut_thrsrm_U (magma_int_t order, magma_d_matrix L, magma_d_matrix *A, double *thrs, magma_queue_t queue)
	Removes any element with absolute value smaller equal or larger equal thrs from the matrix and compacts the whole thing. More...
magma_int_t	magma_dparilut_thrsrm_semilinked (magma_d_matrix *U, magma_d_matrix *US, double *thrs, magma_queue_t queue)
	Removes any element with absolute value smaller thrs from the matrix. More...
magma_int_t	magma_dparilut_rmselected (magma_d_matrix R, magma_d_matrix *A, magma_queue_t queue)
	Removes a selected list of elements from the matrix. More...
magma_int_t	magma_dparilut_selectoneperrow (magma_int_t order, magma_d_matrix *A, magma_d_matrix *oneA, magma_queue_t queue)
	This function takes a list of candidates with residuals, and selects the largest in every row. More...
magma_int_t	magma_dparilut_selecttwoperrow (magma_int_t order, magma_d_matrix *A, magma_d_matrix *oneA, magma_queue_t queue)
	This function takes a list of candidates with residuals, and selects the largest in every row. More...
magma_int_t	magma_dparilut_selectoneperrowthrs_lower (magma_d_matrix L, magma_d_matrix U, magma_d_matrix *A, double rtol, magma_d_matrix *oneA, magma_queue_t queue)
	This function takes a list of candidates with residuals, and selects the largest in every row. More...
magma_int_t	magma_dparilut_selectoneperrowthrs_upper (magma_d_matrix L, magma_d_matrix U, magma_d_matrix *A, double rtol, magma_d_matrix *oneA, magma_queue_t queue)
	This function takes a list of candidates with residuals, and selects the largest in every row. More...
magma_int_t	magma_dparilut_preselect (magma_int_t order, magma_d_matrix *A, magma_d_matrix *oneA, magma_queue_t queue)
	This function takes a list of candidates with residuals, and selects the largest in every row. More...
magma_int_t	magma_dparilut_preselect_scale (magma_d_matrix *L, magma_d_matrix *oneL, magma_d_matrix *U, magma_d_matrix *oneU, magma_queue_t queue)
	This function takes a list of candidates with residuals, and selects the largest in every row. More...
magma_int_t	magma_dparilut_transpose (magma_d_matrix A, magma_d_matrix *B, magma_queue_t queue)
	Transposes a matrix that already contains rowidx. More...
magma_int_t	magma_dparilut_transpose_select_one (magma_d_matrix A, magma_d_matrix *B, magma_queue_t queue)
	This is a special routine with very limited scope. More...
magma_int_t	magma_dparilut_create_collinkedlist (magma_d_matrix A, magma_d_matrix *B, magma_queue_t queue)
	For the matrix U in CSR (row-major) this creates B containing a row-ptr to the columns and a linked list for the elements. More...
magma_int_t	magma_dparilut_sweep_semilinked (magma_d_matrix *A, magma_d_matrix *L, magma_d_matrix *US, magma_queue_t queue)
	This function does an ParILU sweep. More...
magma_int_t	magma_dparilut_sweep_list (magma_d_matrix *A, magma_d_matrix *L, magma_d_matrix *U, magma_queue_t queue)
	This function does an ParILU sweep. More...
magma_int_t	magma_dparilut_residuals_semilinked (magma_d_matrix A, magma_d_matrix L, magma_d_matrix US, magma_d_matrix *L_new, magma_queue_t queue)
	This function computes the residuals. More...
magma_int_t	magma_dparilut_residuals_transpose (magma_d_matrix A, magma_d_matrix L, magma_d_matrix U, magma_d_matrix *U_new, magma_queue_t queue)
	This function computes the residuals. More...
magma_int_t	magma_dparilut_residuals_list (magma_d_matrix A, magma_d_matrix L, magma_d_matrix U, magma_d_matrix *L_new, magma_queue_t queue)
	This function computes the residuals. More...
magma_int_t	magma_dparilut_sweep_linkedlist (magma_d_matrix *A, magma_d_matrix *L, magma_d_matrix *U, magma_queue_t queue)
	This function does an ParILU sweep. More...
magma_int_t	magma_dparilut_residuals_linkedlist (magma_d_matrix A, magma_d_matrix L, magma_d_matrix U, magma_d_matrix *L_new, magma_queue_t queue)
	This function computes the residuals. More...
magma_int_t	magma_dparilut_colmajor (magma_d_matrix A, magma_d_matrix *AC, magma_queue_t queue)
	This function creates a col-pointer and a linked list along the columns for a row-major CSR matrix. More...
magma_int_t	magma_dparilut_reorder (magma_d_matrix *LU, magma_queue_t queue)
	This routine reorders the matrix (inplace) for easier access. More...
magma_int_t	magma_dparilut_colmajorup (magma_d_matrix A, magma_d_matrix *AC, magma_queue_t queue)
	This function creates a col-pointer and a linked list along the columns for a row-major CSR matrix. More...
magma_int_t	magma_dparilut_insert (magma_int_t *num_rmL, magma_int_t *num_rmU, magma_index_t *rm_locL, magma_index_t *rm_locU, magma_d_matrix *L_new, magma_d_matrix *U_new, magma_d_matrix *L, magma_d_matrix *U, magma_d_matrix *UR, magma_queue_t queue)
	Inserts for the iterative dynamic ILU an new element in the (empty) place. More...
magma_int_t	magma_dparilut_candidates (magma_d_matrix L0, magma_d_matrix U0, magma_d_matrix L, magma_d_matrix U, magma_d_matrix *L_new, magma_d_matrix *U_new, magma_queue_t queue)
	This function identifies the candidates like they appear as ILU1 fill-in. More...
magma_int_t	magma_dparilut_candidates_semilinked (magma_d_matrix L0, magma_d_matrix U0, magma_d_matrix L, magma_d_matrix U, magma_d_matrix UT, magma_d_matrix *L_new, magma_d_matrix *U_new, magma_queue_t queue)
	This function identifies the candidates like they appear as ILU1 fill-in. More...
magma_int_t	magma_dparilut_rm_thrs (double *thrs, magma_int_t *num_rm, magma_d_matrix *LU, magma_d_matrix *LU_new, magma_index_t *rm_loc, magma_queue_t queue)
	This routine removes matrix entries from the structure that are smaller than the threshold. More...
magma_int_t	magma_dparilut_count (magma_d_matrix L, magma_int_t *num, magma_queue_t queue)
	This is a helper routine counting elements in a matrix in unordered Magma_CSRLIST format. More...
magma_int_t	magma_dparilut_select_candidates_L (magma_int_t *num_rm, magma_index_t *rm_loc, magma_d_matrix *L_new, magma_queue_t queue)
	Screens the new candidates for multiple elements in the same row. More...
magma_int_t	magma_dparilut_select_candidates_U (magma_int_t *num_rm, magma_index_t *rm_loc, magma_d_matrix *L_new, magma_queue_t queue)
	Screens the new candidates for multiple elements in the same row. More...
magma_int_t	magma_dparilut_set_approx_thrs (magma_int_t num_rm, magma_d_matrix *LU, magma_int_t order, double *thrs, magma_queue_t queue)
	This routine approximates the threshold for removing num_rm elements. More...
magma_int_t	magma_dparilut_set_thrs_randomselect (magma_int_t num_rm, magma_d_matrix *LU, magma_int_t order, double *thrs, magma_queue_t queue)
	This routine approximates the threshold for removing num_rm elements. More...
magma_int_t	magma_dparilut_set_thrs_L_scaled (magma_int_t num_rm, magma_d_matrix *L, magma_d_matrix *U, magma_int_t order, double *thrs, magma_queue_t queue)
	This routine approximates the threshold for removing num_rm elements. More...
magma_int_t	magma_dparilut_set_thrs_randomselect_approx2 (magma_int_t num_rm, magma_d_matrix *LU, magma_int_t order, double *thrs, magma_queue_t queue)
	This routine approximates the threshold for removing num_rm elements. More...
magma_int_t	magma_dparilut_set_thrs_randomselect_approx (magma_int_t num_rm, magma_d_matrix *LU, magma_int_t order, double *thrs, magma_queue_t queue)
	This routine approximates the threshold for removing num_rm elements. More...
magma_int_t	magma_dparilut_set_thrs_randomselect_factors (magma_int_t num_rm, magma_d_matrix *L, magma_d_matrix *U, magma_int_t order, double *thrs, magma_queue_t queue)
	This routine approximates the threshold for removing num_rm elements. More...
magma_int_t	magma_dparilut_set_exact_thrs (magma_int_t num_rm, magma_d_matrix *LU, magma_int_t order, double *thrs, magma_queue_t queue)
	This routine provides the exact threshold for removing num_rm elements. More...
magma_int_t	magma_dparilut_set_approx_thrs_inc (magma_int_t num_rm, magma_d_matrix *LU, magma_int_t order, double *thrs, magma_queue_t queue)
	This routine provides the exact threshold for removing num_rm elements. More...
magma_int_t	magma_dparilut_align_residuals (magma_d_matrix L, magma_d_matrix U, magma_d_matrix *Lnew, magma_d_matrix *Unew, magma_queue_t queue)
	This function scales the residuals of a lower triangular factor L with the diagonal of U. More...
magma_int_t	magma_dfrobenius (magma_d_matrix A, magma_d_matrix B, real_Double_t *res, magma_queue_t queue)
	Computes the Frobenius norm of the difference between the CSR matrices A and B. More...
magma_int_t	magma_dnonlinres (magma_d_matrix A, magma_d_matrix L, magma_d_matrix U, magma_d_matrix *LU, real_Double_t *res, magma_queue_t queue)
	Computes the nonlinear residual A - LU and returns the difference as well es the Frobenius norm of the difference. More...
magma_int_t	magma_dilures (magma_d_matrix A, magma_d_matrix L, magma_d_matrix U, magma_d_matrix *LU, real_Double_t *res, real_Double_t *nonlinres, magma_queue_t queue)
	Computes the ILU residual A - LU and returns the difference as well es the Frobenius norm of the difference. More...
magma_int_t	magma_dicres (magma_d_matrix A, magma_d_matrix C, magma_d_matrix CT, magma_d_matrix *LU, real_Double_t *res, real_Double_t *nonlinres, magma_queue_t queue)
	Computes the IC residual A - CC^T and returns the difference as well es the Frobenius norm of the difference. More...
magma_int_t	magma_dinitguess (magma_d_matrix A, magma_d_matrix *L, magma_d_matrix *U, magma_queue_t queue)
	Computes an initial guess for the ParILU/ParIC. More...
magma_int_t	magma_dinitrecursiveLU (magma_d_matrix A, magma_d_matrix *B, magma_queue_t queue)
	Using the iterative approach of computing ILU factorizations with increasing fill-in, it takes the input matrix A, containing the approximate factors, ( L and U as well ) computes a matrix with one higher level of fill-in, inserts the original approximation as initial guess, and provides the factors L and U also filled with the scaled initial guess. More...
magma_int_t	magma_dmLdiagadd (magma_d_matrix *L, magma_queue_t queue)
	Checks for a lower triangular matrix whether it is strictly lower triangular and in the negative case adds a unit diagonal. More...
magma_int_t	magma_dselect (double *a, magma_int_t size, magma_int_t k, magma_queue_t queue)
	An efficient implementation of Blum, Floyd, Pratt, Rivest, and Tarjan's worst-case linear selection algorithm. More...
magma_int_t	magma_dselectrandom (double *a, magma_int_t size, magma_int_t k, magma_queue_t queue)
	An efficient implementation of Blum, Floyd, Pratt, Rivest, and Tarjan's worst-case linear selection algorithm. More...
magma_int_t	magma_dsolverinfo (magma_d_solver_par *solver_par, magma_d_preconditioner *precond_par, magma_queue_t queue)
	Prints information about a previously called solver. More...
magma_int_t	magma_dsolverinfo_free (magma_d_solver_par *solver_par, magma_d_preconditioner *precond_par, magma_queue_t queue)
	Frees any memory assocoiated with the verbose mode of solver_par. More...
magma_int_t	magma_dsolverinfo_init (magma_d_solver_par *solver_par, magma_d_preconditioner *precond_par, magma_queue_t queue)
	Initializes all solver and preconditioner parameters. More...
magma_int_t	magma_deigensolverinfo_init (magma_d_solver_par *solver_par, magma_queue_t queue)
	Initializes space for eigensolvers. More...
magma_int_t	magma_dsort (double *x, magma_int_t first, magma_int_t last, magma_queue_t queue)
	Sorts an array of values in increasing order. More...
magma_int_t	magma_dmsort (double *x, magma_index_t *col, magma_index_t *row, magma_int_t first, magma_int_t last, magma_queue_t queue)
	Sorts an array of values in increasing order. More...
magma_int_t	magma_dindexsort (magma_index_t *x, magma_int_t first, magma_int_t last, magma_queue_t queue)
	Sorts an array of integers in increasing order. More...
magma_int_t	magma_dindexsortval (magma_index_t *x, double *y, magma_int_t first, magma_int_t last, magma_queue_t queue)
	Sorts an array of integers, updates a respective array of values. More...
magma_int_t	magma_dmorderstatistics (double *val, magma_index_t *col, magma_index_t *row, magma_int_t length, magma_int_t k, magma_int_t r, double *element, magma_queue_t queue)
	Identifies the kth smallest/largest element in an array and reorders such that these elements come to the front. More...
magma_int_t	magma_dorderstatistics (double *val, magma_int_t length, magma_int_t k, magma_int_t r, double *element, magma_queue_t queue)
	Identifies the kth smallest/largest element in an array. More...
magma_int_t	magma_dorderstatistics_inc (double *val, magma_int_t length, magma_int_t k, magma_int_t inc, magma_int_t r, double *element, magma_queue_t queue)
	Approximates the k-th smallest element in an array by using order-statistics with step-size inc. More...
magma_int_t	magma_dbitonic_sort (magma_int_t start, magma_int_t length, double *seq, magma_int_t flag, magma_queue_t queue)
	Approximates the k-th smallest element in an array by using order-statistics with step-size inc. More...
magma_int_t	magma_dparse_opts (int argc, char **argv, magma_dopts *opts, int *matrices, magma_queue_t queue)
	Parses input options for a solver. More...
magma_int_t	magma_dvinit (magma_d_matrix *x, magma_location_t mem_loc, magma_int_t num_rows, magma_int_t num_cols, double values, magma_queue_t queue)
	Allocates memory for magma_d_matrix and initializes it with the passed value. More...
magma_int_t	magma_dvinit_rand (magma_d_matrix *x, magma_location_t mem_loc, magma_int_t num_rows, magma_int_t num_cols, magma_queue_t queue)
	Allocates memory for magma_d_matrix and initializes it with random values. More...
magma_int_t	magma_dprint_vector (magma_d_matrix x, magma_int_t offset, magma_int_t visulen, magma_queue_t queue)
	Visualizes part of a vector of type magma_d_matrix. More...
magma_int_t	magma_dvread (magma_d_matrix *x, magma_int_t length, char *filename, magma_queue_t queue)
	Reads in a double vector of length "length". More...
magma_int_t	magma_dvspread (magma_d_matrix *x, const char *filename, magma_queue_t queue)
	Reads in a sparse vector-block stored in COO format. More...
magma_int_t	magma_dwrite_vector (magma_d_matrix A, const char *filename, magma_queue_t queue)
	Writes a vector to a file. More...
magma_int_t	magma_dvset (magma_int_t m, magma_int_t n, double *val, magma_d_matrix *v, magma_queue_t queue)
	Passes a vector to MAGMA. More...
magma_int_t	magma_dvcopy (magma_d_matrix v, magma_int_t *m, magma_int_t *n, double *val, magma_queue_t queue)
	Passes a MAGMA vector back. More...
magma_int_t	magma_dvset_dev (magma_int_t m, magma_int_t n, magmaDouble_ptr val, magma_d_matrix *v, magma_queue_t queue)
	Passes a vector to MAGMA (located on DEV). More...
magma_int_t	magma_dvget (magma_d_matrix v, magma_int_t *m, magma_int_t *n, double **val, magma_queue_t queue)
	Passes a MAGMA vector back. More...
magma_int_t	magma_dvget_dev (magma_d_matrix v, magma_int_t *m, magma_int_t *n, magmaDouble_ptr *val, magma_queue_t queue)
	Passes a MAGMA vector back (located on DEV). More...
magma_int_t	magma_dvcopy_dev (magma_d_matrix v, magma_int_t *m, magma_int_t *n, magmaDouble_ptr val, magma_queue_t queue)
	Passes a MAGMA vector back (located on DEV). More...
magma_int_t	magma_dvtranspose (magma_d_matrix x, magma_d_matrix *y, magma_queue_t queue)
	Transposes a vector from col to row major and vice versa. More...
magma_int_t	magma_disai_generator_regs (magma_uplo_t uplotype, magma_trans_t transtype, magma_diag_t diagtype, magma_d_matrix L, magma_d_matrix *M, magma_queue_t queue)
	This routine is designet to combine all kernels into one. More...
magma_int_t	magma_dgeisai_maxblock (magma_d_matrix L, magma_d_matrix *MT, magma_queue_t queue)
	This routine maximizes the pattern for the ISAI preconditioner. More...
magma_int_t	magma_dmtrisolve_batched_gpu (magma_uplo_t uplotype, magma_trans_t transtype, magma_diag_t diagtype, magma_d_matrix L, magma_d_matrix LC, magma_index_t *sizes, magma_index_t *locations, double *trisystems, double *rhs, magma_queue_t queue)
	Does all triangular solves. More...
magma_int_t	magma_dlobpcg_res (magma_int_t num_rows, magma_int_t num_vecs, magmaDouble_ptr evalues, magmaDouble_ptr X, magmaDouble_ptr R, magmaDouble_ptr res, magma_queue_t queue)
	This routine computes for Block-LOBPCG, the set of residuals. More...
magma_int_t	magma_dlobpcg_shift (magma_int_t num_rows, magma_int_t num_vecs, magma_int_t shift, magmaDouble_ptr x, magma_queue_t queue)
	For a Block-LOBPCG, the set of residuals (entries consecutive in memory) shrinks and the vectors are shifted in case shift residuals drop below threshold. More...
magma_int_t	magma_dparilut_candidates_gpu (magma_d_matrix L0, magma_d_matrix U0, magma_d_matrix L, magma_d_matrix U, magma_d_matrix *L_new, magma_d_matrix *U_new, magma_queue_t queue)
	This function identifies the locations with a potential nonzero ILU residual R = A - L*U where L and U are the current incomplete factors. More...
magma_int_t	magma_dcopyscale (magma_int_t n, magma_int_t k, magmaDouble_ptr r, magmaDouble_ptr v, magmaDouble_ptr skp, magma_queue_t queue)
	Computes the correction term of the pipelined GMRES according to P. More...
magma_int_t	magma_ddiagcheck (magma_d_matrix dA, magma_queue_t queue)
	This routine checks for a CSR matrix whether there exists a zero on the diagonal. More...
magma_int_t	magma_dmatrix_cup_gpu (magma_d_matrix A, magma_d_matrix B, magma_d_matrix *U, magma_queue_t queue)
	Generates a matrix U = A B. More...
magma_int_t	magma_dcsr_sort_gpu (magma_d_matrix *A, magma_queue_t queue)
	Generates a matrix U = A B. More...
magma_int_t	magma_dmconjugate (magma_d_matrix *A, magma_queue_t queue)
	This function conjugates a matrix. More...
magma_int_t	magma_dmcsrcompressor_gpu (magma_d_matrix *A, magma_queue_t queue)
	Removes zeros in a CSR matrix. More...
magma_int_t	magma_dpreselect_gpu (magma_int_t order, magma_d_matrix *A, magma_d_matrix *oneA, magma_queue_t queue)
	This function takes a list of candidates with residuals, and selects the largest in every row. More...
magma_int_t	magma_dsampleselect (magma_int_t total_size, magma_int_t subset_size, double *val, double *thrs, magma_ptr *tmp_ptr, magma_int_t *tmp_size, magma_queue_t queue)
	This routine selects a threshold separating the subset_size smallest magnitude elements from the rest. More...
magma_int_t	magma_dsampleselect_approx (magma_int_t total_size, magma_int_t subset_size, double *val, double *thrs, magma_ptr *tmp_ptr, magma_int_t *tmp_size, magma_queue_t queue)
	This routine selects an approximate threshold separating the subset_size smallest magnitude elements from the rest. More...
magma_int_t	magma_dsampleselect_nodp (magma_int_t total_size, magma_int_t subset_size, double *val, double *thrs, magma_ptr *tmp_ptr, magma_int_t *tmp_size, magma_queue_t queue)
	This routine selects a threshold separating the subset_size smallest magnitude elements from the rest. More...
magma_int_t	magma_dsampleselect_approx_nodp (magma_int_t total_size, magma_int_t subset_size, double *val, double *thrs, magma_ptr *tmp_ptr, magma_int_t *tmp_size, magma_queue_t queue)
	This routine selects an approximate threshold separating the subset_size smallest magnitude elements from the rest. More...
magma_int_t	magma_dthrsholdrm_gpu (magma_int_t order, magma_d_matrix *A, double *thrs, magma_queue_t queue)
	Purpose More...

Detailed Description

Function Documentation

magma_int_t magma_dresidual	(	magma_d_matrix	A,
		magma_d_matrix	b,
		magma_d_matrix	x,
		double *	res,
		magma_queue_t	queue
	)

Computes the residual ||b-Ax|| for a solution approximation x.

Parameters

[in]	A	magma_d_matrix input matrix A
[in]	b	magma_d_matrix RHS b
[in]	x	magma_d_matrix solution approximation
[out]	res	double* return residual
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dresidual_slice	(	magma_int_t	start,
		magma_int_t	end,
		magma_d_matrix	A,
		magma_d_matrix	b,
		magma_d_matrix	x,
		double *	res,
		magma_queue_t	queue
	)

Computes the residual r=||b-Ax|| for the slice r(start:end) for a solution approximation x.

Parameters

[in]	start	magma_int_t start of slice (row-index)
[in]	end	magma_int_t end of slice (row-index)
[in]	A	magma_d_matrix input matrix A
[in]	b	magma_d_matrix RHS b
[in]	x	magma_d_matrix solution approximation
[out]	res	double* return residual
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dresidualvec	(	magma_d_matrix	A,
		magma_d_matrix	b,
		magma_d_matrix	x,
		magma_d_matrix *	r,
		double *	res,
		magma_queue_t	queue
	)

Computes the residual r = b-Ax for a solution approximation x.

It returns both, the actual residual and the residual vector

Parameters

[in]	A	magma_d_matrix input matrix A
[in]	b	magma_d_matrix RHS b
[in]	x	magma_d_matrix solution approximation
[in,out]	r	magma_d_matrix* residual vector
[out]	res	double* return residual
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_d_precond	(	magma_d_matrix	A,
		magma_d_matrix	b,
		magma_d_matrix *	x,
		magma_d_preconditioner *	precond,
		magma_queue_t	queue
	)

For a given input matrix A and vectors x, y and the preconditioner parameters, the respective preconditioner is chosen.

It approximates x for A x = y.

Parameters

[in]	A	magma_d_matrix sparse matrix A
[in]	b	magma_d_matrix input vector b
[in]	x	magma_d_matrix* output vector x
[in,out]	precond	magma_d_preconditioner preconditioner
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_d_precondsetup	(	magma_d_matrix	A,
		magma_d_matrix	b,
		magma_d_solver_par *	solver,
		magma_d_preconditioner *	precond,
		magma_queue_t	queue
	)

For a given input matrix M and vectors x, y and the preconditioner parameters, the respective preconditioner is preprocessed.

E.g. for Jacobi: the scaling-vetor, for ILU the factorization.

Parameters

[in]	A	magma_d_matrix sparse matrix M
[in]	b	magma_d_matrix input vector y
[in]	solver	magma_d_solver_par solver structure using the preconditioner
[in,out]	precond	magma_d_preconditioner preconditioner
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_d_applyprecond	(	magma_d_matrix	A,
		magma_d_matrix	b,
		magma_d_matrix *	x,
		magma_d_preconditioner *	precond,
		magma_queue_t	queue
	)

For a given input matrix A and vectors x, y and the preconditioner parameters, the respective preconditioner is applied.

E.g. for Jacobi: the scaling-vetor, for ILU the triangular solves.

Parameters

[in]	A	magma_d_matrix sparse matrix A
[in]	b	magma_d_matrix input vector b
[in,out]	x	magma_d_matrix* output vector x
[in]	precond	magma_d_preconditioner preconditioner
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_d_applyprecond_left	(	magma_trans_t	trans,
		magma_d_matrix	A,
		magma_d_matrix	b,
		magma_d_matrix *	x,
		magma_d_preconditioner *	precond,
		magma_queue_t	queue
	)

For a given input matrix A and vectors x, y and the preconditioner parameters, the respective left preconditioner is applied.

E.g. for Jacobi: the scaling-vetor, for ILU the left triangular solve.

Parameters

[in]	trans	magma_trans_t mode of the preconditioner: MagmaTrans or MagmaNoTrans
[in]	A	magma_d_matrix sparse matrix A
[in]	b	magma_d_matrix input vector b
[in,out]	x	magma_d_matrix* output vector x
[in]	precond	magma_d_preconditioner preconditioner
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_d_applyprecond_right	(	magma_trans_t	trans,
		magma_d_matrix	A,
		magma_d_matrix	b,
		magma_d_matrix *	x,
		magma_d_preconditioner *	precond,
		magma_queue_t	queue
	)

For a given input matrix A and vectors x, y and the preconditioner parameters, the respective right-preconditioner is applied.

E.g. for Jacobi: the scaling-vetor, for ILU the right triangular solve.

Parameters

[in]	trans	magma_trans_t mode of the preconditioner: MagmaTrans or MagmaNoTrans
[in]	A	magma_d_matrix sparse matrix A
[in]	b	magma_d_matrix input vector b
[in,out]	x	magma_d_matrix* output vector x
[in]	precond	magma_d_preconditioner preconditioner
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_d_solver	(	magma_d_matrix	A,
		magma_d_matrix	b,
		magma_d_matrix *	x,
		magma_dopts *	zopts,
		magma_queue_t	queue
	)

This is an interface that allows to use any iterative solver on the linear system Ax = b.

All linear algebra objects are expected to be on the device, the linear algebra objects are MAGMA-sparse specific structures (dense matrix b, dense matrix x, sparse/dense matrix A). The additional parameter zopts contains information about the solver and the preconditioner. the type of solver the relative / absolute stopping criterion the maximum number of iterations the preconditioner type ... Please see magmasparse_types.h for details about the fields and magma_dutil_sparse.cpp for the possible options.

Parameters

[in]	A	magma_d_matrix sparse matrix A
[in]	b	magma_d_matrix input vector b
[in]	x	magma_d_matrix* output vector x
[in]	zopts	magma_dopts options for solver and preconditioner
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dapplycustomprecond_l	(	magma_d_matrix	b,
		magma_d_matrix *	x,
		magma_d_preconditioner *	precond,
		magma_queue_t	queue
	)

This is an interface to the left solve for any custom preconditioner.

It should compute x = FUNCTION(b) The vectors are located on the device.

Parameters

[in]	b	magma_d_matrix RHS
[in,out]	x	magma_d_matrix* vector to precondition
[in,out]	precond	magma_d_preconditioner* preconditioner parameters
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dapplycustomprecond_r	(	magma_d_matrix	b,
		magma_d_matrix *	x,
		magma_d_preconditioner *	precond,
		magma_queue_t	queue
	)

This is an interface to the right solve for any custom preconditioner.

It should compute x = FUNCTION(b) The vectors are located on the device.

Parameters

[in]	b	magma_d_matrix RHS
[in,out]	x	magma_d_matrix* vector to precondition
[in,out]	precond	magma_d_preconditioner* preconditioner parameters
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dcsrsplit	(	magma_int_t	offset,
		magma_int_t	bsize,
		magma_d_matrix	A,
		magma_d_matrix *	D,
		magma_d_matrix *	R,
		magma_queue_t	queue
	)

Splits a CSR matrix into two matrices, one containing the diagonal blocks with the diagonal element stored first, one containing the rest of the original matrix.

Parameters

[in]	offset	magma_int_t size of the first block
[in]	bsize	magma_int_t size of the diagonal blocks
[in]	A	magma_d_matrix CSR input matrix
[out]	D	magma_d_matrix* CSR matrix containing diagonal blocks
[out]	R	magma_d_matrix* CSR matrix containing rest
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_ddomainoverlap	(	magma_index_t	num_rows,
		magma_int_t *	num_indices,
		magma_index_t *	rowptr,
		magma_index_t *	colidx,
		magma_index_t *	x,
		magma_queue_t	queue
	)

Generates the update list.

Parameters

[in]	x	magma_index_t* array to sort
[in]	num_rows	magma_int_t number of rows in matrix
[out]	num_indices	magma_int_t* number of indices in array
[in]	rowptr	magma_index_t* rowpointer of matrix
[in]	colidx	magma_index_t* colindices of matrix
[in]	x	magma_index_t* array containing indices for domain overlap
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmfree	(	magma_d_matrix *	A,
		magma_queue_t	queue
	)

Free the memory of a magma_d_matrix.

Parameters

[in,out]	A	magma_d_matrix* matrix to free
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dprecondfree	(	magma_d_preconditioner *	precond_par,
		magma_queue_t	queue
	)

Free a preconditioner.

Parameters

[in,out]	precond_par	magma_d_preconditioner* structure containing all preconditioner information
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmprepare_batched	(	magma_uplo_t	uplotype,
		magma_trans_t	transtype,
		magma_diag_t	diagtype,
		magma_d_matrix	L,
		magma_d_matrix	LC,
		magma_index_t *	sizes,
		magma_index_t *	locations,
		double *	trisystems,
		double *	rhs,
		magma_queue_t	queue
	)

Takes a sparse matrix and generates an array containing the sizes of the different systems an array containing the indices with the locations in the sparse matrix where the data comes from and goes back to an array containing all the sparse triangular systems.

    - padded with zeros to size 32x32
  an array containing the RHS

Parameters

[in]	uplotype	magma_uplo_t lower or upper triangular
[in]	transtype	magma_trans_t possibility for transposed matrix
[in]	diagtype	magma_diag_t unit diagonal or not
[in]	L	magma_d_matrix Matrix in CSR format
[in]	LC	magma_d_matrix same matrix, also CSR, but col-major
[in,out]	sizes	magma_int_t* Number of Elements that are replaced.
[in,out]	locations	magma_int_t* Array indicating the locations.
[in,out]	trisystems	double* trisystems
[in,out]	rhs	double* right-hand sides
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmtrisolve_batched	(	magma_uplo_t	uplotype,
		magma_trans_t	transtype,
		magma_diag_t	diagtype,
		magma_d_matrix	L,
		magma_d_matrix	LC,
		magma_index_t *	sizes,
		magma_index_t *	locations,
		double *	trisystems,
		double *	rhs,
		magma_queue_t	queue
	)

Does all triangular solves.

Parameters

[in]	uplotype	magma_uplo_t lower or upper triangular
[in]	transtype	magma_trans_t possibility for transposed matrix
[in]	diagtype	magma_diag_t unit diagonal or not
[in]	L	magma_d_matrix Matrix in CSR format
[in]	LC	magma_d_matrix same matrix, also CSR, but col-major
[out]	sizes	magma_int_t* Number of Elements that are replaced.
[out]	locations	magma_int_t* Array indicating the locations.
[out]	trisystems	double* trisystems
[out]	rhs	double* right-hand sides
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmbackinsert_batched	(	magma_uplo_t	uplotype,
		magma_trans_t	transtype,
		magma_diag_t	diagtype,
		magma_d_matrix *	M,
		magma_index_t *	sizes,
		magma_index_t *	locations,
		double *	trisystems,
		double *	rhs,
		magma_queue_t	queue
	)

Inserts the values into the preconditioner matrix.

Parameters

[in]	uplotype	magma_uplo_t lower or upper triangular
[in]	transtype	magma_trans_t possibility for transposed matrix
[in]	diagtype	magma_diag_t unit diagonal or not
[in,out]	M	magma_d_matrix* SPAI preconditioner CSR col-major
[out]	sizes	magma_int_t* Number of Elements that are replaced.
[out]	locations	magma_int_t* Array indicating the locations.
[out]	trisystems	double* trisystems
[out]	rhs	double* right-hand sides
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmiluspai_sizecheck	(	magma_d_matrix	A,
		magma_index_t	batchsize,
		magma_index_t *	maxsize,
		magma_queue_t	queue
	)

Checks for a matrix whether the batched ISAI works for a given thread-block size.

Parameters

[in]	A	magma_d_matrix system matrix
[in]	batchsize	magma_int_t Size of the batch (GPU thread block).
[out]	maxsize	magma_int_t* maximum A(:,i) and A(i,:).
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmisai_blockstruct	(	magma_int_t	n,
		magma_int_t	bs,
		magma_int_t	offs,
		magma_uplo_t	uplotype,
		magma_d_matrix *	A,
		magma_queue_t	queue
	)

Generates a block-diagonal sparsity pattern with block-size bs.

Parameters

[in]	n	magma_int_t Size of the matrix.
[in]	bs	magma_int_t Size of the diagonal blocks.
[in]	offs	magma_int_t Size of the first diagonal block.
[in]	uplotype	magma_uplo_t lower or upper triangular
[in,out]	A	magma_d_matrix* Generated sparsity pattern matrix.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmatrix_cup	(	magma_d_matrix	A,
		magma_d_matrix	B,
		magma_d_matrix *	U,
		magma_queue_t	queue
	)

Generates a matrix U = A B.

If both matrices have a nonzero value in the same location, the value of A is used.

Parameters

[in]	A	magma_d_matrix Input matrix 1.
[in]	B	magma_d_matrix Input matrix 2.
[out]	U	magma_d_matrix* Not a real matrix, but the list of all matrix entries included in either A or B. No duplicates.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmatrix_cap	(	magma_d_matrix	A,
		magma_d_matrix	B,
		magma_d_matrix *	U,
		magma_queue_t	queue
	)

Generates a matrix with entries being in both matrices: U = A B.

The values in U are all ones.

Parameters

[in]	A	magma_d_matrix Input matrix 1.
[in]	B	magma_d_matrix Input matrix 2.
[out]	U	magma_d_matrix* Not a real matrix, but the list of all matrix entries included in both A and B.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmatrix_negcap	(	magma_d_matrix	A,
		magma_d_matrix	B,
		magma_d_matrix *	U,
		magma_queue_t	queue
	)

Generates a list of matrix entries being part of A but not of B.

U = A \ B The values of A are preserved.

Parameters

[in]	A	magma_d_matrix Element part of this.
[in,out]	B	magma_d_matrix Not part of this.
[out]	U	magma_d_matrix* Not a real matrix, but the list of all matrix entries included in A not in B.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmatrix_tril_negcap	(	magma_d_matrix	A,
		magma_d_matrix	B,
		magma_d_matrix *	U,
		magma_queue_t	queue
	)

Generates a list of matrix entries being part of tril(A) but not of B.

U = tril(A) \ B The values of A are preserved.

Parameters

[in]	A	magma_d_matrix Element part of this.
[in,out]	B	magma_d_matrix Not part of this.
[out]	U	magma_d_matrix* Not a real matrix, but the list of all matrix entries included in A not in B.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmatrix_triu_negcap	(	magma_d_matrix	A,
		magma_d_matrix	B,
		magma_d_matrix *	U,
		magma_queue_t	queue
	)

Generates a matrix with entries being part of triu(A) but not of B.

U = triu(A) \ B The values of A are preserved.

Parameters

[in]	A	magma_d_matrix Element part of this.
[in]	B	magma_d_matrix Not part of this.
[out]	U	magma_d_matrix*
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmatrix_addrowindex	(	magma_d_matrix *	A,
		magma_queue_t	queue
	)

Adds to a CSR matrix an array containing the rowindexes.

Parameters

[in,out]	A	magma_d_matrix* Matrix where rowindexes should be added.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dcsrcoo_transpose	(	magma_d_matrix	A,
		magma_d_matrix *	B,
		magma_queue_t	queue
	)

Transposes a matrix that already contains rowidx.

The idea is to use a linked list.

Parameters

[in]	A	magma_d_matrix Matrix to transpose.
[out]	B	magma_d_matrix* Transposed matrix.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmatrix_createrowptr	(	magma_int_t	n,
		magma_index_t *	row,
		magma_queue_t	queue
	)

This function generates a rowpointer out of a row-wise element count in parallel.

Parameters

[in]	n	magma_indnt_t row-count.
[in,out]	row	magma_index_t* Input: Vector of size n+1 containing the row-counts (offset by one). Output: Rowpointer.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmatrix_swap	(	magma_d_matrix *	A,
		magma_d_matrix *	B,
		magma_queue_t	queue
	)

Swaps two matrices.

Useful if a loop modifies the name of a matrix.

Parameters

[in,out]	A	magma_d_matrix* Matrix to be swapped with B.
[in,out]	B	magma_d_matrix* Matrix to be swapped with A.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmatrix_tril	(	magma_d_matrix	A,
		magma_d_matrix *	L,
		magma_queue_t	queue
	)

Extracts the lower triangular of a matrix: L = tril(A).

The values of A are preserved.

Parameters

[in]	A	magma_d_matrix Element part of this.
[out]	L	magma_d_matrix* Lower triangular part of A.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmatrix_triu	(	magma_d_matrix	A,
		magma_d_matrix *	U,
		magma_queue_t	queue
	)

Extracts the lower triangular of a matrix: U = triu(A).

The values of A are preserved.

Parameters

[in]	A	magma_d_matrix Element part of this.
[out]	U	magma_d_matrix* Lower triangular part of A.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmatrix_abssum	(	magma_d_matrix	A,
		double *	sum,
		magma_queue_t	queue
	)

Computes the sum of the absolute values in a matrix.

Parameters

[in]	A	magma_d_matrix Element list/matrix.
[out]	sum	double* Sum of the absolute values.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dcsr_sort	(	magma_d_matrix *	A,
		magma_queue_t	queue
	)

SOrts the elements in a CSR matrix for increasing column index.

Parameters

[in,out]	A	magma_d_matrix* CSR matrix, sorted on output.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_drowentries	(	magma_d_matrix *	A,
		magma_queue_t	queue
	)

Checks the maximal number of nonzeros in a row of matrix A.

Inserts the data into max_nnz_row.

Parameters

[in,out]	A	magma_d_matrix* sparse matrix
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_ddiameter	(	magma_d_matrix *	A,
		magma_queue_t	queue
	)

Computes the diameter of a sparse matrix and stores the value in diameter.

Parameters

[in,out]	A	magma_d_matrix* sparse matrix
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_d_csr_compressor	(	double **	val,
		magma_index_t **	row,
		magma_index_t **	col,
		double **	valn,
		magma_index_t **	rown,
		magma_index_t **	coln,
		magma_int_t *	n,
		magma_queue_t	queue
	)

Helper function to compress CSR containing zero-entries.

Parameters

[in]	val	double** input val pointer to compress
[in]	row	magma_int_t** input row pointer to modify
[in]	col	magma_int_t** input col pointer to compress
[in]	valn	double** output val pointer
[out]	rown	magma_int_t** output row pointer
[out]	coln	magma_int_t** output col pointer
[out]	n	magma_int_t* number of rows in matrix
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmconvert	(	magma_d_matrix	A,
		magma_d_matrix *	B,
		magma_storage_t	old_format,
		magma_storage_t	new_format,
		magma_queue_t	queue
	)

Converter between different sparse storage formats.

Parameters

[in]	A	magma_d_matrix sparse matrix A
[out]	B	magma_d_matrix* copy of A in new format
[in]	old_format	magma_storage_t original storage format
[in]	new_format	magma_storage_t new storage format
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmcsrcompressor	(	magma_d_matrix *	A,
		magma_queue_t	queue
	)

Removes zeros in a CSR matrix.

Parameters

[in,out]	A	magma_d_matrix* input/output matrix
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dcsrset	(	magma_int_t	m,
		magma_int_t	n,
		magma_index_t *	row,
		magma_index_t *	col,
		double *	val,
		magma_d_matrix *	A,
		magma_queue_t	queue
	)

Passes a CSR matrix to MAGMA.

Parameters

[in]	m	magma_int_t number of rows
[in]	n	magma_int_t number of columns
[in]	row	magma_index_t* row pointer
[in]	col	magma_index_t* column indices
[in]	val	double* array containing matrix entries
[out]	A	magma_d_matrix* matrix in magma sparse matrix format
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dcsrget	(	magma_d_matrix	A,
		magma_int_t *	m,
		magma_int_t *	n,
		magma_index_t **	row,
		magma_index_t **	col,
		double **	val,
		magma_queue_t	queue
	)

Passes a MAGMA matrix to CSR structure.

Parameters

[in]	A	magma_d_matrix magma sparse matrix in CSR format
[out]	m	magma_int_t number of rows
[out]	n	magma_int_t number of columns
[out]	row	magma_index_t* row pointer
[out]	col	magma_index_t* column indices
[out]	val	double* array containing matrix entries
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dcsrset_gpu	(	magma_int_t	m,
		magma_int_t	n,
		magmaIndex_ptr	row,
		magmaIndex_ptr	col,
		magmaDouble_ptr	val,
		magma_d_matrix *	A,
		magma_queue_t	queue
	)

Passes a CSR matrix to MAGMA (located on DEV).

Parameters

[in]	m	magma_int_t number of rows
[in]	n	magma_int_t number of columns
[in]	row	magmaIndex_ptr row pointer
[in]	col	magmaIndex_ptr column indices
[in]	val	magmaDouble_ptr array containing matrix entries
[out]	A	magma_d_matrix* matrix in magma sparse matrix format
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dcsrget_gpu	(	magma_d_matrix	A,
		magma_int_t *	m,
		magma_int_t *	n,
		magmaIndex_ptr *	row,
		magmaIndex_ptr *	col,
		magmaDouble_ptr *	val,
		magma_queue_t	queue
	)

Passes a MAGMA matrix to CSR structure (located on DEV).

Parameters

[in]	A	magma_d_matrix magma sparse matrix in CSR format
[out]	m	magma_int_t number of rows
[out]	n	magma_int_t number of columns
[out]	row	magmaIndex_ptr row pointer
[out]	col	magmaIndex_ptr column indices
[out]	val	magmaDouble_ptr array containing matrix entries
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmdiagdom	(	magma_d_matrix	M,
		double *	min_dd,
		double *	max_dd,
		double *	avg_dd,
		magma_queue_t	queue
	)

This routine takes a CSR matrix and computes the average diagonal dominance.

For each row i, it computes the abs(d_ii)/sum_j(abs(a_ij)). It returns max, min, and average.

Parameters

[in]	M	magma_d_matrix System matrix.
[out]	min_dd	double Smallest diagonal dominance.
[out]	max_dd	double Largest diagonal dominance.
[out]	avg_dd	double Average diagonal dominance.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmbdiagdom	(	magma_d_matrix	M,
		magma_d_matrix	blocksizes,
		double *	min_dd,
		double *	max_dd,
		double *	avg_dd,
		magma_queue_t	queue
	)

This routine takes a CSR matrix and computes the average block-diagonal dominance.

For each row i, it computes the abs( D_(i,:) ) / abs( A(i,:) \ D_(i,:) ). It returns max, min, and average. The input vector bsz contains the blocksizes.

Parameters

[in]	M	magma_d_matrix System matrix.
[in]	blocksizes	magma_d_matrix Vector containing blocksizes (as DoubleComplex).
[out]	min_dd	double Smallest diagonal dominance.
[out]	max_dd	double Largest diagonal dominance.
[out]	avg_dd	double Average diagonal dominance.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmdiff	(	magma_d_matrix	A,
		magma_d_matrix	B,
		real_Double_t *	res,
		magma_queue_t	queue
	)

Computes the Frobenius norm of the difference between the CSR matrices A and B.

They do not need to share the same sparsity pattern!

   res = ||A-B||_F = sqrt( sum_ij (A_ij-B_ij)^2 )

Parameters

[in]	A	magma_d_matrix sparse matrix in CSR
[in]	B	magma_d_matrix sparse matrix in CSR
[out]	res	real_Double_t* residual
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmfrobenius	(	magma_d_matrix	A,
		magma_d_matrix	B,
		magma_d_matrix	S,
		double *	norm,
		magma_queue_t	queue
	)

Computes the Frobenius norm || A - B ||_S on the sparsity pattern of S.

Parameters

[in]	A	magma_d_matrix input sparse matrix in CSR
[in]	B	magma_d_matrix input sparse matrix in CSR
[in]	S	magma_d_matrix input sparsity pattern in CSR
[out]	norm	double* Frobenius norm of difference on sparsity pattern S
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmgenerator	(	magma_int_t	n,
		magma_int_t	offdiags,
		magma_index_t *	diag_offset,
		double *	diag_vals,
		magma_d_matrix *	A,
		magma_queue_t	queue
	)

Generate a symmetric n x n CSR matrix for a stencil.

Parameters

[in]	n	magma_int_t number of rows
[in]	offdiags	magma_int_t number of offdiagonals
[in]	diag_offset	magma_int_t* array containing the offsets (length offsets+1)
[in]	diag_vals	double* array containing the values (length offsets+1)
[out]	A	magma_d_matrix* matrix to generate
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dm_27stencil	(	magma_int_t	n,
		magma_d_matrix *	A,
		magma_queue_t	queue
	)

Generate a 27-point stencil for a 3D FD discretization.

Parameters

[in]	n	magma_int_t number of rows
[out]	A	magma_d_matrix* matrix to generate
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dm_5stencil	(	magma_int_t	n,
		magma_d_matrix *	A,
		magma_queue_t	queue
	)

Generate a 5-point stencil for a 2D FD discretization.

Parameters

[in]	n	magma_int_t number of rows
[out]	A	magma_d_matrix* matrix to generate
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dsymbilu	(	magma_d_matrix *	A,
		magma_int_t	levels,
		magma_d_matrix *	L,
		magma_d_matrix *	U,
		magma_queue_t	queue
	)

This routine performs a symbolic ILU factorization.

The algorithm is taken from an implementation written by Edmond Chow.

Parameters

[in,out]	A	magma_d_matrix* matrix in magma sparse matrix format containing the original matrix on input, and L,U on output
[in]	levels	magma_magma_int_t_t fill in level
[out]	L	magma_d_matrix* output lower triangular matrix in magma sparse matrix format empty on function call
[out]	U	magma_d_matrix* output upper triangular matrix in magma sparse matrix format empty on function call
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t read_d_csr_from_mtx	(	magma_storage_t *	type,
		magma_location_t *	location,
		magma_int_t *	n_row,
		magma_int_t *	n_col,
		magma_int_t *	nnz,
		double **	val,
		magma_index_t **	row,
		magma_index_t **	col,
		const char *	filename,
		magma_queue_t	queue
	)

Reads in a matrix stored in coo format from a Matrix Market (.mtx) file and converts it into CSR format.

It duplicates the off-diagonal entries in the symmetric case.

Parameters

[out]	type	magma_storage_t* storage type of matrix
[out]	location	magma_location_t* location of matrix
[out]	n_row	magma_int_t* number of rows in matrix
[out]	n_col	magma_int_t* number of columns in matrix
[out]	nnz	magma_int_t* number of nonzeros in matrix
[out]	val	double** value array of CSR output
[out]	row	magma_index_t** row pointer of CSR output
[out]	col	magma_index_t** column indices of CSR output
[in]	filename	const char* filname of the mtx matrix
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dwrite_csr_mtx	(	magma_d_matrix	A,
		magma_order_t	MajorType,
		const char *	filename,
		magma_queue_t	queue
	)

Writes a CSR matrix to a file using Matrix Market format.

Parameters

[in]	A	magma_d_matrix matrix to write out
[in]	MajorType	magma_index_t Row or Column sort default: 0 = RowMajor, 1 = ColMajor TODO: use named constants (e.g., MagmaRowMajor), not numbers.
[in]	filename	const char* output-filname of the mtx matrix
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dprint_csr_mtx	(	magma_int_t	n_row,
		magma_int_t	n_col,
		magma_int_t	nnz,
		double **	val,
		magma_index_t **	row,
		magma_index_t **	col,
		magma_order_t	MajorType,
		magma_queue_t	queue
	)

Prints a CSR matrix in Matrix Market format.

Parameters

[in]	n_row	magma_int_t* number of rows in matrix
[in]	n_col	magma_int_t* number of columns in matrix
[in]	nnz	magma_int_t* number of nonzeros in matrix
[in]	val	double** value array of CSR
[in]	row	magma_index_t** row pointer of CSR
[in]	col	magma_index_t** column indices of CSR
[in]	MajorType	magma_index_t Row or Column sort default: 0 = RowMajor, 1 = ColMajor
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dprint_csr	(	magma_int_t	n_row,
		magma_int_t	n_col,
		magma_int_t	nnz,
		double **	val,
		magma_index_t **	row,
		magma_index_t **	col,
		magma_queue_t	queue
	)

Prints a CSR matrix in CSR format.

Parameters

[in]	n_row	magma_int_t* number of rows in matrix
[in]	n_col	magma_int_t* number of columns in matrix
[in]	nnz	magma_int_t* number of nonzeros in matrix
[in]	val	double** value array of CSR
[in]	row	magma_index_t** row pointer of CSR
[in]	col	magma_index_t** column indices of CSR
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dprint_matrix	(	magma_d_matrix	A,
		magma_queue_t	queue
	)

Prints a sparse matrix in CSR format.

Parameters

[in]	A	magma_d_matrix sparse matrix in Magma_CSR format
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_d_csr_mtx	(	magma_d_matrix *	A,
		const char *	filename,
		magma_queue_t	queue
	)

Reads in a matrix stored in coo format from a Matrix Market (.mtx) file and converts it into CSR format.

It duplicates the off-diagonal entries in the symmetric case.

Parameters

[out]	A	magma_d_matrix* matrix in magma sparse matrix format
[in]	filename	const char* filname of the mtx matrix
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_d_csr_mtxsymm	(	magma_d_matrix *	A,
		const char *	filename,
		magma_queue_t	queue
	)

Reads in a SYMMETRIC matrix stored in coo format from a Matrix Market (.mtx) file and converts it into CSR format.

It does not duplicate the off-diagonal entries!

Parameters

[out]	A	magma_d_matrix* matrix in magma sparse matrix format
[in]	filename	const char* filname of the mtx matrix
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmlumerge	(	magma_d_matrix	L,
		magma_d_matrix	U,
		magma_d_matrix *	A,
		magma_queue_t	queue
	)

Takes an strictly lower triangular matrix L and an upper triangular matrix U and merges them into a matrix A containing the upper and lower triangular parts.

Parameters

[in]	L	magma_d_matrix input strictly lower triangular matrix L
[in]	U	magma_d_matrix input upper triangular matrix U
[out]	A	magma_d_matrix* output matrix
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmscale	(	magma_d_matrix *	A,
		magma_scale_t	scaling,
		magma_queue_t	queue
	)

Scales a matrix.

Parameters

[in,out]	A	magma_d_matrix* input/output matrix
[in]	scaling	magma_scale_t scaling type (unit rownorm / unit diagonal)
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmscale_matrix_rhs	(	magma_d_matrix *	A,
		magma_d_matrix *	b,
		magma_d_matrix *	scaling_factors,
		magma_scale_t	scaling,
		magma_queue_t	queue
	)

Scales a matrix and a right hand side vector of a Ax = b system.

Parameters

[in,out]	A	magma_d_matrix* input/output matrix
[in,out]	b	magma_d_matrix* input/output right hand side vector
[out]	scaling_factors	magma_d_matrix* output scaling factors vector
[in]	scaling	magma_scale_t scaling type (unit rownorm / unit diagonal)
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmdiagadd	(	magma_d_matrix *	A,
		double	add,
		magma_queue_t	queue
	)

Adds a multiple of the Identity matrix to a matrix: A = A+add * I.

Parameters

[in,out]	A	magma_d_matrix* input/output matrix
[in]	add	double scaling for the identity matrix
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmscale_generate	(	magma_int_t	n,
		magma_scale_t *	scaling,
		magma_side_t *	side,
		magma_d_matrix *	A,
		magma_d_matrix *	scaling_factors,
		magma_queue_t	queue
	)

Generates n vectors of scaling factors from the A matrix and stores them in the factors matrix as column vectors in column major ordering.

Parameters

[in]	n	magma_int_t number of diagonal scaling matrices
[in]	scaling	magma_scale_t* array of scaling specifiers
[in]	side	magma_side_t* array of side specifiers
[in]	A	magma_d_matrix* input matrix
[out]	scaling_factors	magma_d_matrix* array of diagonal matrices
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmscale_apply	(	magma_int_t	n,
		magma_side_t *	side,
		magma_d_matrix *	scaling_factors,
		magma_d_matrix *	A,
		magma_queue_t	queue
	)

Applies n diagonal scaling matrices to a matrix A; n=[1,2], factor[i] is applied to side[i] of the matrix.

Parameters

[in]	n	magma_int_t number of diagonal scaling matrices
[in]	side	magma_side_t* array of side specifiers
[in]	scaling_factors	magma_d_matrix* array of diagonal matrices
[in,out]	A	magma_d_matrix* input/output matrix
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_ddimv	(	magma_d_matrix *	vecA,
		magma_d_matrix *	vecB,
		magma_queue_t	queue
	)

Multiplies a diagonal matrix (vecA) and a vector (vecB).

Parameters

[in]	vecA	magma_d_matrix* input matrix
[in,out]	vecB	magma_d_matrix* input/output matrix
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmshrink	(	magma_d_matrix	A,
		magma_d_matrix *	B,
		magma_queue_t	queue
	)

Shrinks a non-square matrix (m < n) to the smaller dimension.

Parameters

[in]	A	magma_d_matrix sparse matrix A
[out]	B	magma_d_matrix* sparse matrix A
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmslice	(	magma_int_t	num_slices,
		magma_int_t	slice,
		magma_d_matrix	A,
		magma_d_matrix *	B,
		magma_d_matrix *	ALOC,
		magma_d_matrix *	ANLOC,
		magma_index_t *	comm_i,
		double *	comm_v,
		magma_int_t *	start,
		magma_int_t *	end,
		magma_queue_t	queue
	)

Takes a matrix and extracts a slice for solving the system in parallel:

B = A( i:i+n, : ) and ALOC = A(i:i+n,i:i+n) and ANLOCA(0:start - end:n,:)

B is of size n x n, ALOC of size end-start x end-start, ANLOC of size end-start x n

The last slice might be smaller. For the non-local parts, B is the identity. comm contains 1ess in the locations that are non-local but needed to solve local system.

Parameters

[in]	num_slices	magma_int_t number of slices
[in]	slice	magma_int_t slice id (0.. num_slices-1)
[in]	A	magma_d_matrix sparse matrix in CSR
[out]	B	magma_d_matrix* sparse matrix in CSR
[out]	ALOC	magma_d_matrix* sparse matrix in CSR
[out]	ANLOC	magma_d_matrix* sparse matrix in CSR
[in,out]	comm_i	magma_int_t* communication plan
[in,out]	comm_v	double* communication plan
[in]	queue	magma_queue_t Queue to execute in.
[out]	start	magma_int_t* start of slice (row-index)
[out]	end	magma_int_t* end of slice (row-index)

magma_int_t magma_dmsupernodal	(	magma_int_t *	max_bs,
		magma_d_matrix	A,
		magma_d_matrix *	S,
		magma_queue_t	queue
	)

Generates a block-diagonal sparsity pattern with block-size bs.

Parameters

[in,out]	max_bs	magma_int_t* Size of the largest diagonal block.
[in]	A	magma_d_matrix System matrix.
[in,out]	S	magma_d_matrix* Generated sparsity pattern matrix.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmvarsizeblockstruct	(	magma_int_t	n,
		magma_int_t *	bs,
		magma_int_t	bsl,
		magma_uplo_t	uplotype,
		magma_d_matrix *	A,
		magma_queue_t	queue
	)

Generates a block-diagonal sparsity pattern with variable block-size.

Parameters

[in]	n	magma_int_t Size of the matrix.
[in]	bs	magma_int_t* Vector containing the size of the diagonal blocks.
[in]	bsl	magma_int_t Size of the vector containing the block sizes.
[in]	uplotype	magma_uplo_t lower or upper triangular
[in,out]	A	magma_d_matrix* Generated sparsity pattern matrix.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmtransfer	(	magma_d_matrix	A,
		magma_d_matrix *	B,
		magma_location_t	src,
		magma_location_t	dst,
		magma_queue_t	queue
	)

Copies a matrix from memory location src to memory location dst.

Parameters

[in]	A	magma_d_matrix sparse matrix A
[out]	B	magma_d_matrix* copy of A
[in]	src	magma_location_t original location A
[in]	dst	magma_location_t location of the copy of A
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t d_transpose_csr	(	magma_int_t	n_rows,
		magma_int_t	n_cols,
		magma_int_t	nnz,
		double *	values,
		magma_index_t *	rowptr,
		magma_index_t *	colind,
		magma_int_t *	new_n_rows,
		magma_int_t *	new_n_cols,
		magma_int_t *	new_nnz,
		double **	new_values,
		magma_index_t **	new_rowptr,
		magma_index_t **	new_colind,
		magma_queue_t	queue
	)

Transposes a matrix stored in CSR format on the CPU host.

Parameters

[in]	n_rows	magma_int_t number of rows in input matrix
[in]	n_cols	magma_int_t number of columns in input matrix
[in]	nnz	magma_int_t number of nonzeros in input matrix
[in]	values	double* value array of input matrix
[in]	rowptr	magma_index_t* row pointer of input matrix
[in]	colind	magma_index_t* column indices of input matrix
[in]	new_n_rows	magma_index_t* number of rows in transposed matrix
[in]	new_n_cols	magma_index_t* number of columns in transposed matrix
[in]	new_nnz	magma_index_t* number of nonzeros in transposed matrix
[in]	new_values	double** value array of transposed matrix
[in]	new_rowptr	magma_index_t** row pointer of transposed matrix
[in]	new_colind	magma_index_t** column indices of transposed matrix
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmtranspose	(	magma_d_matrix	A,
		magma_d_matrix *	B,
		magma_queue_t	queue
	)

Interface to cuSPARSE transpose.

Parameters

[in]	A	magma_d_matrix input matrix (CSR)
[out]	B	magma_d_matrix* output matrix (CSR)
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_d_cucsrtranspose	(	magma_d_matrix	A,
		magma_d_matrix *	B,
		magma_queue_t	queue
	)

Helper function to transpose CSR matrix.

Using the CUSPARSE CSR2CSC function.

Parameters

[in]	A	magma_d_matrix input matrix (CSR)
[out]	B	magma_d_matrix* output matrix (CSR)
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmtransposeconjugate	(	magma_d_matrix	A,
		magma_d_matrix *	B,
		magma_queue_t	queue
	)

This function forms the transpose conjugate of a matrix.

For a real-value matrix, the output is the transpose.

Parameters

[in]	A	magma_d_matrix input matrix (CSR)
[out]	B	magma_d_matrix* output matrix (CSR)
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmtranspose_cpu	(	magma_d_matrix	A,
		magma_d_matrix *	B,
		magma_queue_t	queue
	)

Generates a transpose of A on the CPU.

Parameters

[in]	A	magma_d_matrix input matrix (CSR)
[out]	B	magma_d_matrix* output matrix (CSR)
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmtransposeconj_cpu	(	magma_d_matrix	A,
		magma_d_matrix *	B,
		magma_queue_t	queue
	)

Generates a transpose conjugate of A on the CPU.

Parameters

[in]	A	magma_d_matrix input matrix (CSR)
[out]	B	magma_d_matrix* output matrix (CSR)
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmtransposestruct_cpu	(	magma_d_matrix	A,
		magma_d_matrix *	B,
		magma_queue_t	queue
	)

Generates a transpose of the nonzero pattern of A on the CPU.

Parameters

[in]	A	magma_d_matrix input matrix (CSR)
[out]	B	magma_d_matrix* output matrix (CSR)
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmtransposeabs_cpu	(	magma_d_matrix	A,
		magma_d_matrix *	B,
		magma_queue_t	queue
	)

Generates a transpose with absolute values of A on the CPU.

Parameters

[in]	A	magma_d_matrix input matrix (CSR)
[out]	B	magma_d_matrix* output matrix (CSR)
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparic_sweep	(	magma_d_matrix	A,
		magma_d_matrix *	L,
		magma_queue_t	queue
	)

This function does one asynchronous ParILU sweep (symmetric case).

Input and output array is identical.

Parameters

[in]	A	magma_d_matrix System matrix in COO.
[in]	L	magma_d_matrix* Current approximation for the lower triangular factor The format is sorted CSR.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparic_sweep_sync	(	magma_d_matrix	A,
		magma_d_matrix *	L,
		magma_queue_t	queue
	)

This function does one synchronized ParILU sweep (symmetric case).

Input and output are different arrays.

Parameters

[in]	A	magma_d_matrix System matrix in COO.
[in]	L	magma_d_matrix* Current approximation for the lower triangular factor The format is sorted CSR.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparict_candidates	(	magma_d_matrix	L0,
		magma_d_matrix	L,
		magma_d_matrix	LT,
		magma_d_matrix *	L_new,
		magma_queue_t	queue
	)

This function identifies the candidates like they appear as ILU1 fill-in.

In this version, the matrices are assumed unordered, the linked list is traversed to acces the entries of a row.

Parameters

[in]	L0	magma_d_matrix tril( ILU(0) ) pattern of original system matrix.
[in]	L	magma_d_matrix Current lower triangular factor.
[in]	LT	magma_d_matrix Transose of the lower triangular factor.
[in,out]	L_new	magma_d_matrix* List of candidates for L in COO format.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparict_sweep_sync	(	magma_d_matrix *	A,
		magma_d_matrix *	L,
		magma_queue_t	queue
	)

This function does one synchronized ParILU sweep.

Input and output are different arrays.

Parameters

[in]	A	magma_d_matrix* System matrix.
[in]	L	magma_d_matrix* Current approximation for the lower triangular factor The format is sorted CSR.
[in]	U	magma_d_matrix* Current approximation for the upper triangular factor The format is sorted CSC.
[out]	L_new	magma_d_matrix* Current approximation for the lower triangular factor The format is unsorted CSR.
[out]	U_new	magma_d_matrix* Current approximation for the upper triangular factor The format is unsorted CSC.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilu_sweep	(	magma_d_matrix	A,
		magma_d_matrix *	L,
		magma_d_matrix *	U,
		magma_queue_t	queue
	)

This function does one asynchronous ParILU sweep.

Input and output array are identical.

Parameters

[in]	A	magma_d_matrix System matrix in COO.
[in]	L	magma_d_matrix* Current approximation for the lower triangular factor The format is sorted CSR.
[in]	U	magma_d_matrix* Current approximation for the upper triangular factor The format is sorted CSC (U^T in CSR).
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilu_sweep_sync	(	magma_d_matrix	A,
		magma_d_matrix *	L,
		magma_d_matrix *	U,
		magma_queue_t	queue
	)

This function does one synchronized ParILU sweep.

Input and output are different arrays.

Parameters

[in]	A	magma_d_matrix System matrix in COO.
[in]	L	magma_d_matrix* Current approximation for the lower triangular factor The format is sorted CSR.
[in]	U	magma_d_matrix* Current approximation for the upper triangular factor The format is sorted CSC (U^T in CSR).
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_sweep	(	magma_d_matrix *	A,
		magma_d_matrix *	L,
		magma_d_matrix *	U,
		magma_queue_t	queue
	)

This function does an ParILUT sweep.

The difference to the ParILU sweep is that the nonzero pattern of A and the incomplete factors L and U can be different. The pattern determing which elements are iterated are hence the pattern of L and U, not A.

This is the CPU version of the asynchronous ParILUT sweep.

Parameters

[in]	A	magma_d_matrix* System matrix. The format is sorted CSR.
[in,out]	L	magma_d_matrix* Current approximation for the lower triangular factor The format is MAGMA_CSRCOO. This is sorted CSR plus the rowindexes being stored.
[in,out]	U	magma_d_matrix* Current approximation for the lower triangular factor The format is MAGMA_CSRCOO. This is sorted CSR plus the rowindexes being stored.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_sweep_sync	(	magma_d_matrix *	A,
		magma_d_matrix *	L,
		magma_d_matrix *	U,
		magma_queue_t	queue
	)

This function does an ParILUT sweep.

The difference to the ParILU sweep is that the nonzero pattern of A and the incomplete factors L and U can be different. The pattern determing which elements are iterated are hence the pattern of L and U, not A.

This is the CPU version of the synchronous ParILUT sweep.

Parameters

[in]	A	magma_d_matrix* System matrix. The format is sorted CSR.
[in,out]	L	magma_d_matrix* Current approximation for the lower triangular factor The format is MAGMA_CSRCOO. This is sorted CSR plus the rowindexes being stored.
[in,out]	U	magma_d_matrix* Current approximation for the lower triangular factor The format is MAGMA_CSRCOO. This is sorted CSR plus the rowindexes being stored.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_residuals	(	magma_d_matrix	A,
		magma_d_matrix	L,
		magma_d_matrix	U,
		magma_d_matrix *	R,
		magma_queue_t	queue
	)

This function computes the ILU residual in the locations included in the sparsity pattern of R.

Parameters

[in]	A	magma_d_matrix System matrix A.
[in]	L	magma_d_matrix Current approximation for the lower triangular factor. The format is sorted CSR.
[in]	U	magma_d_matrix Current approximation for the upper triangular factor. The format is sorted CSR.
[in,out]	R	magma_d_matrix* Sparsity pattern on which the ILU residual is computed. R is in COO format. On output, R contains the ILU residual.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_thrsrm	(	magma_int_t	order,
		magma_d_matrix *	A,
		double *	thrs,
		magma_queue_t	queue
	)

Removes any element with absolute value smaller equal or larger equal thrs from the matrix and compacts the whole thing.

Parameters

[in]	order	magma_int_t order == 1: all elements smaller are discarded order == 0: all elements larger are discarded
[in,out]	A	magma_d_matrix* Matrix where elements are removed.
[in]	thrs	double* Threshold: all elements smaller are discarded
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_thrsrm_U	(	magma_int_t	order,
		magma_d_matrix	L,
		magma_d_matrix *	A,
		double *	thrs,
		magma_queue_t	queue
	)

Removes any element with absolute value smaller equal or larger equal thrs from the matrix and compacts the whole thing.

Parameters

[in]	order	magma_int_t order == 1: all elements smaller are discarded order == 0: all elements larger are discarded
[in,out]	A	magma_d_matrix* Matrix where elements are removed.
[in]	thrs	double* Threshold: all elements smaller are discarded
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_thrsrm_semilinked	(	magma_d_matrix *	U,
		magma_d_matrix *	US,
		double *	thrs,
		magma_queue_t	queue
	)

Removes any element with absolute value smaller thrs from the matrix.

It only uses the linked list and skips the ``removed'' elements

Parameters

[in,out]	A	magma_d_matrix* Matrix where elements are removed.
[in]	thrs	double* Threshold: all elements smaller are discarded
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_rmselected	(	magma_d_matrix	R,
		magma_d_matrix *	A,
		magma_queue_t	queue
	)

Removes a selected list of elements from the matrix.

Parameters

[in]	R	magma_d_matrix Matrix containing elements to be removed.
[in,out]	A	magma_d_matrix* Matrix where elements are removed.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_selectoneperrow	(	magma_int_t	order,
		magma_d_matrix *	A,
		magma_d_matrix *	oneA,
		magma_queue_t	queue
	)

This function takes a list of candidates with residuals, and selects the largest in every row.

The output matrix only contains these largest elements (respectively a zero element if there is no candidate for a certain row).

Parameters

[in]	order	magma_int_t order==1 -> largest order==0 -> smallest
[in]	A	magma_d_matrix* Matrix where elements are removed.
[out]	oneA	magma_d_matrix* Matrix where elements are removed.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_selecttwoperrow	(	magma_int_t	order,
		magma_d_matrix *	A,
		magma_d_matrix *	oneA,
		magma_queue_t	queue
	)

This function takes a list of candidates with residuals, and selects the largest in every row.

The output matrix only contains these largest elements (respectively a zero element if there is no candidate for a certain row).

Parameters

[in]	order	magma_int_t order==1 -> largest order==0 -> smallest
[in]	A	magma_d_matrix* Matrix where elements are removed.
[out]	oneA	magma_d_matrix* Matrix where elements are removed.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_selectoneperrowthrs_lower	(	magma_d_matrix	L,
		magma_d_matrix	U,
		magma_d_matrix *	A,
		double	rtol,
		magma_d_matrix *	oneA,
		magma_queue_t	queue
	)

This function takes a list of candidates with residuals, and selects the largest in every row.

The output matrix only contains these largest elements (respectively a zero element if there is no candidate for a certain row).

Parameters

[in]	L	magma_d_matrix Current lower triangular factor.
[in]	U	magma_d_matrix Current upper triangular factor.
[in]	A	magma_d_matrix* All residuals in L.
[in]	rtol	threshold rtol
[out]	oneA	magma_d_matrix* at most one per row, if larger thrs.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_selectoneperrowthrs_upper	(	magma_d_matrix	L,
		magma_d_matrix	U,
		magma_d_matrix *	A,
		double	rtol,
		magma_d_matrix *	oneA,
		magma_queue_t	queue
	)

This function takes a list of candidates with residuals, and selects the largest in every row.

The output matrix only contains these largest elements (respectively a zero element if there is no candidate for a certain row).

Parameters

[in]	L	magma_d_matrix Current lower triangular factor.
[in]	U	magma_d_matrix Current upper triangular factor.
[in]	A	magma_d_matrix* All residuals in L.
[in]	rtol	threshold rtol
[out]	oneA	magma_d_matrix* at most one per row, if larger thrs.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_preselect	(	magma_int_t	order,
		magma_d_matrix *	A,
		magma_d_matrix *	oneA,
		magma_queue_t	queue
	)

This function takes a list of candidates with residuals, and selects the largest in every row.

The output matrix only contains these largest elements (respectively a zero element if there is no candidate for a certain row).

Parameters

[in]	order	magma_int_t order==0 lower triangular order==1 upper triangular
[in]	A	magma_d_matrix* Matrix where elements are removed.
[out]	oneA	magma_d_matrix* Matrix where elements are removed.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_preselect_scale	(	magma_d_matrix *	L,
		magma_d_matrix *	oneL,
		magma_d_matrix *	U,
		magma_d_matrix *	oneU,
		magma_queue_t	queue
	)

This function takes a list of candidates with residuals, and selects the largest in every row.

The output matrix only contains these largest elements (respectively a zero element if there is no candidate for a certain row).

Parameters

[in]	L	magma_d_matrix* Matrix where elements are removed.
[in]	U	magma_d_matrix* Matrix where elements are removed.
[out]	oneL	magma_d_matrix* Matrix where elements are removed.
[out]	oneU	magma_d_matrix* Matrix where elements are removed.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_transpose	(	magma_d_matrix	A,
		magma_d_matrix *	B,
		magma_queue_t	queue
	)

Transposes a matrix that already contains rowidx.

The idea is to use a linked list.

Parameters

[in]	A	magma_d_matrix Matrix to transpose.
[out]	B	magma_d_matrix* Transposed matrix.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_transpose_select_one	(	magma_d_matrix	A,
		magma_d_matrix *	B,
		magma_queue_t	queue
	)

This is a special routine with very limited scope.

For a set of fill-in candidates in row-major format, it transposes the a submatrix, i.e. the submatrix consisting of the largest element in every column. This function is only useful for delta<=1.

Parameters

[in]	A	magma_d_matrix Matrix to transpose.
[out]	B	magma_d_matrix* Transposed matrix containing only largest elements in each col.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_create_collinkedlist	(	magma_d_matrix	A,
		magma_d_matrix *	B,
		magma_queue_t	queue
	)

For the matrix U in CSR (row-major) this creates B containing a row-ptr to the columns and a linked list for the elements.

Parameters

[in]	A	magma_d_matrix Matrix to transpose.
[out]	B	magma_d_matrix* Transposed matrix.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_sweep_semilinked	(	magma_d_matrix *	A,
		magma_d_matrix *	L,
		magma_d_matrix *	US,
		magma_queue_t	queue
	)

This function does an ParILU sweep.

Parameters

[in,out]	A	magma_d_matrix* Current ILU approximation The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in,out]	L	magma_d_matrix* Current approximation for the lower triangular factor The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in,out]	U	magma_d_matrix* Current approximation for the upper triangular factor The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_sweep_list	(	magma_d_matrix *	A,
		magma_d_matrix *	L,
		magma_d_matrix *	U,
		magma_queue_t	queue
	)

This function does an ParILU sweep.

Parameters

[in,out]	A	magma_d_matrix* Current ILU approximation The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in,out]	L	magma_d_matrix* Current approximation for the lower triangular factor The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in,out]	U	magma_d_matrix* Current approximation for the upper triangular factor The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_residuals_semilinked	(	magma_d_matrix	A,
		magma_d_matrix	L,
		magma_d_matrix	US,
		magma_d_matrix *	L_new,
		magma_queue_t	queue
	)

This function computes the residuals.

Parameters

[in,out]	L	magma_d_matrix Current approximation for the lower triangular factor The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in,out]	U	magma_d_matrix* Current approximation for the upper triangular factor The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_residuals_transpose	(	magma_d_matrix	A,
		magma_d_matrix	L,
		magma_d_matrix	U,
		magma_d_matrix *	U_new,
		magma_queue_t	queue
	)

This function computes the residuals.

Parameters

[in,out]	L	magma_d_matrix Current approximation for the lower triangular factor The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in,out]	U	magma_d_matrix* Current approximation for the upper triangular factor The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_residuals_list	(	magma_d_matrix	A,
		magma_d_matrix	L,
		magma_d_matrix	U,
		magma_d_matrix *	L_new,
		magma_queue_t	queue
	)

This function computes the residuals.

Parameters

[in,out]	L	magma_d_matrix Current approximation for the lower triangular factor The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in,out]	U	magma_d_matrix* Current approximation for the upper triangular factor The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_sweep_linkedlist	(	magma_d_matrix *	A,
		magma_d_matrix *	L,
		magma_d_matrix *	U,
		magma_queue_t	queue
	)

This function does an ParILU sweep.

Parameters

[in,out]	A	magma_d_matrix* Current ILU approximation The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in,out]	L	magma_d_matrix* Current approximation for the lower triangular factor The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in,out]	U	magma_d_matrix* Current approximation for the upper triangular factor The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_residuals_linkedlist	(	magma_d_matrix	A,
		magma_d_matrix	L,
		magma_d_matrix	U,
		magma_d_matrix *	L_new,
		magma_queue_t	queue
	)

This function computes the residuals.

Parameters

[in,out]	L	magma_d_matrix Current approximation for the lower triangular factor The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in,out]	U	magma_d_matrix* Current approximation for the upper triangular factor The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_colmajor	(	magma_d_matrix	A,
		magma_d_matrix *	AC,
		magma_queue_t	queue
	)

This function creates a col-pointer and a linked list along the columns for a row-major CSR matrix.

Parameters

[in]	A	magma_d_matrix The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in,out]	AC	magma_d_matrix* The matrix A but with row-pointer being for col-major, same with linked list. The values, col and row indices are unchanged. The respective pointers point to the entities of A.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_reorder	(	magma_d_matrix *	LU,
		magma_queue_t	queue
	)

This routine reorders the matrix (inplace) for easier access.

Parameters

[in]	LU	magma_d_matrix* Current ILU approximation.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_colmajorup	(	magma_d_matrix	A,
		magma_d_matrix *	AC,
		magma_queue_t	queue
	)

This function creates a col-pointer and a linked list along the columns for a row-major CSR matrix.

Parameters

[in]	A	magma_d_matrix The format is unsorted CSR, the list array is used as linked list pointing to the respectively next entry.
[in,out]	AC	magma_d_matrix* The matrix A but with row-pointer being for col-major, same with linked list. The values, col and row indices are unchanged. The respective pointers point to the entities of A. Already allocated.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_insert	(	magma_int_t *	num_rmL,
		magma_int_t *	num_rmU,
		magma_index_t *	rm_locL,
		magma_index_t *	rm_locU,
		magma_d_matrix *	L_new,
		magma_d_matrix *	U_new,
		magma_d_matrix *	L,
		magma_d_matrix *	U,
		magma_d_matrix *	UR,
		magma_queue_t	queue
	)

Inserts for the iterative dynamic ILU an new element in the (empty) place.

Parameters

[in]	num_rmL	magma_int_t Number of Elements that are replaced in L.
[in]	num_rmU	magma_int_t Number of Elements that are replaced in U.
[in]	rm_locL	magma_index_t* List containing the locations of the deleted elements.
[in]	rm_locU	magma_index_t* List containing the locations of the deleted elements.
[in]	L_new	magma_d_matrix Elements that will be inserted in L stored in COO format (unsorted).
[in]	U_new	magma_d_matrix Elements that will be inserted in U stored in COO format (unsorted).
[in,out]	L	magma_d_matrix* matrix where new elements are inserted. The format is unsorted CSR, list is used as linked list pointing to the respectively next entry.
[in,out]	U	magma_d_matrix* matrix where new elements are inserted. Row-major. The format is unsorted CSR, list is used as linked list pointing to the respectively next entry.
[in,out]	UR	magma_d_matrix* Same matrix as U, but column-major. The format is unsorted CSR, list is used as linked list pointing to the respectively next entry.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_candidates	(	magma_d_matrix	L0,
		magma_d_matrix	U0,
		magma_d_matrix	L,
		magma_d_matrix	U,
		magma_d_matrix *	L_new,
		magma_d_matrix *	U_new,
		magma_queue_t	queue
	)

This function identifies the candidates like they appear as ILU1 fill-in.

In this version, the matrices are assumed unordered, the linked list is traversed to acces the entries of a row.

Parameters

[in]	L0	magma_d_matrix tril( ILU(0) ) pattern of original system matrix.
[in]	U0	magma_d_matrix triu( ILU(0) ) pattern of original system matrix.
[in]	L	magma_d_matrix Current lower triangular factor.
[in]	U	magma_d_matrix Current upper triangular factor.
[in,out]	LU_new	magma_d_matrix* List of candidates for L in COO format.
[in,out]	LU_new	magma_d_matrix* List of candidates for U in COO format.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_candidates_semilinked	(	magma_d_matrix	L0,
		magma_d_matrix	U0,
		magma_d_matrix	L,
		magma_d_matrix	U,
		magma_d_matrix	UT,
		magma_d_matrix *	L_new,
		magma_d_matrix *	U_new,
		magma_queue_t	queue
	)

This function identifies the candidates like they appear as ILU1 fill-in.

In this version, the matrices are assumed unordered, the linked list is traversed to acces the entries of a row.

Parameters

[in]	L0	magma_d_matrix tril( ILU(0) ) pattern of original system matrix.
[in]	U0	magma_d_matrix triu( ILU(0) ) pattern of original system matrix.
[in]	L	magma_d_matrix Current lower triangular factor.
[in]	U	magma_d_matrix Current upper triangular factor transposed.
[in]	UR	magma_d_matrix Current upper triangular factor - col-pointer and col-list.
[in,out]	LU_new	magma_d_matrix* List of candidates for L in COO format.
[in,out]	LU_new	magma_d_matrix* List of candidates for U in COO format.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_rm_thrs	(	double *	thrs,
		magma_int_t *	num_rm,
		magma_d_matrix *	LU,
		magma_d_matrix *	LU_new,
		magma_index_t *	rm_loc,
		magma_queue_t	queue
	)

This routine removes matrix entries from the structure that are smaller than the threshold.

It only counts the elements deleted, does not save the locations.

Parameters

[out]	thrs	double* Thrshold for removing elements.
[out]	num_rm	magma_int_t* Number of Elements that have been removed.
[in,out]	LU	magma_d_matrix* Current ILU approximation where the identified smallest components are deleted.
[in,out]	LUC	magma_d_matrix* Corresponding col-list.
[in,out]	LU_new	magma_d_matrix* List of candidates in COO format.
[out]	rm_loc	magma_index_t* List containing the locations of the elements deleted.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_count	(	magma_d_matrix	L,
		magma_int_t *	num,
		magma_queue_t	queue
	)

This is a helper routine counting elements in a matrix in unordered Magma_CSRLIST format.

Parameters

[in]	L	magma_d_matrix* Matrix in Magm_CSRLIST format
[out]	num	magma_index_t* Number of elements counted.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_select_candidates_L	(	magma_int_t *	num_rm,
		magma_index_t *	rm_loc,
		magma_d_matrix *	L_new,
		magma_queue_t	queue
	)

Screens the new candidates for multiple elements in the same row.

We allow for at most one new element per row. This changes the algorithm, but pays off in performance.

Parameters

[in]	num_rmL	magma_int_t Number of Elements that are replaced.
[in]	num_rmU	magma_int_t Number of Elements that are replaced.
[in]	rm_loc	magma_int_t* Number of Elements that are replaced by distinct threads.
[in]	L_new	magma_d_matrix* Elements that will be inserted stored in COO format (unsorted).
[in]	U_new	magma_d_matrix* Elements that will be inserted stored in COO format (unsorted).
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_select_candidates_U	(	magma_int_t *	num_rm,
		magma_index_t *	rm_loc,
		magma_d_matrix *	L_new,
		magma_queue_t	queue
	)

Screens the new candidates for multiple elements in the same row.

We allow for at most one new element per row. This changes the algorithm, but pays off in performance.

Parameters

[in]	num_rmL	magma_int_t Number of Elements that are replaced.
[in]	num_rmU	magma_int_t Number of Elements that are replaced.
[in]	rm_loc	magma_int_t* Number of Elements that are replaced by distinct threads.
[in]	L_new	magma_d_matrix* Elements that will be inserted stored in COO format (unsorted).
[in]	U_new	magma_d_matrix* Elements that will be inserted stored in COO format (unsorted).
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_set_approx_thrs	(	magma_int_t	num_rm,
		magma_d_matrix *	LU,
		magma_int_t	order,
		double *	thrs,
		magma_queue_t	queue
	)

This routine approximates the threshold for removing num_rm elements.

Parameters

[in]	num_rm	magma_int_t Number of Elements that are replaced.
[in]	LU	magma_d_matrix* Current ILU approximation.
[in]	order	magma_int_t Sort goal function: 0 = smallest, 1 = largest.
[out]	thrs	double* Size of the num_rm-th smallest element.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_set_thrs_randomselect	(	magma_int_t	num_rm,
		magma_d_matrix *	LU,
		magma_int_t	order,
		double *	thrs,
		magma_queue_t	queue
	)

This routine approximates the threshold for removing num_rm elements.

Parameters

[in]	num_rm	magma_int_t Number of Elements that are replaced.
[in]	LU	magma_d_matrix* Current ILU approximation.
[in]	order	magma_int_t Sort goal function: 0 = smallest, 1 = largest.
[out]	thrs	double* Size of the num_rm-th smallest element.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_set_thrs_L_scaled	(	magma_int_t	num_rm,
		magma_d_matrix *	L,
		magma_d_matrix *	U,
		magma_int_t	order,
		double *	thrs,
		magma_queue_t	queue
	)

This routine approximates the threshold for removing num_rm elements.

It takes into account the scaling with the diagonal.

Parameters

[in]	num_rm	magma_int_t Number of Elements that are replaced.
[in]	L	magma_d_matrix* Current L approximation.
[in]	U	magma_d_matrix* Current U approximation.
[in]	order	magma_int_t Sort goal function: 0 = smallest, 1 = largest.
[out]	thrs	double* Size of the num_rm-th smallest element.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_set_thrs_randomselect_approx2	(	magma_int_t	num_rm,
		magma_d_matrix *	LU,
		magma_int_t	order,
		double *	thrs,
		magma_queue_t	queue
	)

This routine approximates the threshold for removing num_rm elements.

Parameters

[in]	num_rm	magma_int_t Number of Elements that are replaced.
[in]	LU	magma_d_matrix* Current ILU approximation.
[in]	order	magma_int_t Sort goal function: 0 = smallest, 1 = largest.
[out]	thrs	double* Size of the num_rm-th smallest element.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_set_thrs_randomselect_approx	(	magma_int_t	num_rm,
		magma_d_matrix *	LU,
		magma_int_t	order,
		double *	thrs,
		magma_queue_t	queue
	)

This routine approximates the threshold for removing num_rm elements.

Parameters

[in]	num_rm	magma_int_t Number of Elements that are replaced.
[in]	LU	magma_d_matrix* Current ILU approximation.
[in]	order	magma_int_t Sort goal function: 0 = smallest, 1 = largest.
[out]	thrs	double* Size of the num_rm-th smallest element.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_set_thrs_randomselect_factors	(	magma_int_t	num_rm,
		magma_d_matrix *	L,
		magma_d_matrix *	U,
		magma_int_t	order,
		double *	thrs,
		magma_queue_t	queue
	)

This routine approximates the threshold for removing num_rm elements.

Parameters

[in]	num_rm	magma_int_t Number of Elements that are replaced.
[in]	LU	magma_d_matrix* Current ILU approximation.
[in]	order	magma_int_t Sort goal function: 0 = smallest, 1 = largest.
[out]	thrs	double* Size of the num_rm-th smallest element.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_set_exact_thrs	(	magma_int_t	num_rm,
		magma_d_matrix *	LU,
		magma_int_t	order,
		double *	thrs,
		magma_queue_t	queue
	)

This routine provides the exact threshold for removing num_rm elements.

Parameters

[in]	num_rm	magma_int_t Number of Elements that are replaced.
[in]	LU	magma_d_matrix* Current ILU approximation.
[in]	order	magma_int_t Sort goal function: 0 = smallest, 1 = largest.
[out]	thrs	double* Size of the num_rm-th smallest element.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_set_approx_thrs_inc	(	magma_int_t	num_rm,
		magma_d_matrix *	LU,
		magma_int_t	order,
		double *	thrs,
		magma_queue_t	queue
	)

This routine provides the exact threshold for removing num_rm elements.

Parameters

[in]	num_rm	magma_int_t Number of Elements that are replaced.
[in]	LU	magma_d_matrix* Current ILU approximation.
[in]	order	magma_int_t Sort goal function: 0 = smallest, 1 = largest.
[out]	thrs	double* Size of the num_rm-th smallest element.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_align_residuals	(	magma_d_matrix	L,
		magma_d_matrix	U,
		magma_d_matrix *	Lnew,
		magma_d_matrix *	Unew,
		magma_queue_t	queue
	)

This function scales the residuals of a lower triangular factor L with the diagonal of U.

The intention is to generate a good initial guess for inserting the elements.

Parameters

[in]	L	magma_d_matrix Current approximation for the lower triangular factor The format is sorted CSR.
[in]	U	magma_d_matrix Current approximation for the upper triangular factor The format is sorted CSC.
[in]	hL	magma_d_matrix* Current approximation for the lower triangular factor The format is sorted CSR.
[in]	hU	magma_d_matrix* Current approximation for the upper triangular factor The format is sorted CSC.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dfrobenius	(	magma_d_matrix	A,
		magma_d_matrix	B,
		real_Double_t *	res,
		magma_queue_t	queue
	)

Computes the Frobenius norm of the difference between the CSR matrices A and B.

They need to share the same sparsity pattern!

Parameters

[in]	A	magma_d_matrix sparse matrix in CSR
[in]	B	magma_d_matrix sparse matrix in CSR
[out]	res	real_Double_t* Frobenius norm of difference
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dnonlinres	(	magma_d_matrix	A,
		magma_d_matrix	L,
		magma_d_matrix	U,
		magma_d_matrix *	LU,
		real_Double_t *	res,
		magma_queue_t	queue
	)

Computes the nonlinear residual A - LU and returns the difference as well es the Frobenius norm of the difference.

Parameters

[in]	A	magma_d_matrix input sparse matrix in CSR
[in]	L	magma_d_matrix input sparse matrix in CSR
[in]	U	magma_d_matrix input sparse matrix in CSR
[out]	LU	magma_d_matrix* output sparse matrix in A-LU in CSR
[out]	res	real_Double_t* Frobenius norm of difference
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dilures	(	magma_d_matrix	A,
		magma_d_matrix	L,
		magma_d_matrix	U,
		magma_d_matrix *	LU,
		real_Double_t *	res,
		real_Double_t *	nonlinres,
		magma_queue_t	queue
	)

Computes the ILU residual A - LU and returns the difference as well es the Frobenius norm of the difference.

Parameters

[in]	A	magma_d_matrix input sparse matrix in CSR
[in]	L	magma_d_matrix input sparse matrix in CSR
[in]	U	magma_d_matrix input sparse matrix in CSR
[out]	LU	magma_d_matrix* output sparse matrix in A-LU in CSR
[out]	res	real_Double_t* Frobenius norm of difference
[out]	nonlinres	real_Double_t* Frobenius norm of difference
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dicres	(	magma_d_matrix	A,
		magma_d_matrix	C,
		magma_d_matrix	CT,
		magma_d_matrix *	LU,
		real_Double_t *	res,
		real_Double_t *	nonlinres,
		magma_queue_t	queue
	)

Computes the IC residual A - CC^T and returns the difference as well es the Frobenius norm of the difference.

Parameters

[in]	A	magma_d_matrix input sparse matrix in CSR
[in]	C	magma_d_matrix input sparse matrix in CSR
[in]	CT	magma_d_matrix input sparse matrix in CSR
[in]	LU	magma_d_matrix* output sparse matrix in A-LU in CSR
[out]	res	real_Double_t* IC residual
[out]	nonlinres	real_Double_t* nonlinear residual
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dinitguess	(	magma_d_matrix	A,
		magma_d_matrix *	L,
		magma_d_matrix *	U,
		magma_queue_t	queue
	)

Computes an initial guess for the ParILU/ParIC.

Parameters

[in]	A	magma_d_matrix sparse matrix in CSR
[out]	L	magma_d_matrix* sparse matrix in CSR
[out]	U	magma_d_matrix* sparse matrix in CSR
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dinitrecursiveLU	(	magma_d_matrix	A,
		magma_d_matrix *	B,
		magma_queue_t	queue
	)

Using the iterative approach of computing ILU factorizations with increasing fill-in, it takes the input matrix A, containing the approximate factors, ( L and U as well ) computes a matrix with one higher level of fill-in, inserts the original approximation as initial guess, and provides the factors L and U also filled with the scaled initial guess.

Parameters

[in]	A	magma_d_matrix* sparse matrix in CSR
[out]	B	magma_d_matrix* sparse matrix in CSR
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmLdiagadd	(	magma_d_matrix *	L,
		magma_queue_t	queue
	)

Checks for a lower triangular matrix whether it is strictly lower triangular and in the negative case adds a unit diagonal.

It does this in-place.

Parameters

[in,out]	L	magma_d_matrix* sparse matrix in CSR
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dselect	(	double *	a,
		magma_int_t	size,
		magma_int_t	k,
		magma_queue_t	queue
	)

An efficient implementation of Blum, Floyd, Pratt, Rivest, and Tarjan's worst-case linear selection algorithm.

Derrick Coetzee, webma.nosp@m.ster.nosp@m.@moon.nosp@m.flar.nosp@m.e.com January 22, 2004 http://moonflare.com/code/select/select.pdf

Parameters

[in,out]	a	double* array to select from
[in]	size	magma_int_t size of array
[in]	k	magma_int_t k-th smallest element
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dselectrandom	(	double *	a,
		magma_int_t	size,
		magma_int_t	k,
		magma_queue_t	queue
	)

An efficient implementation of Blum, Floyd, Pratt, Rivest, and Tarjan's worst-case linear selection algorithm.

Derrick Coetzee, webma.nosp@m.ster.nosp@m.@moon.nosp@m.flar.nosp@m.e.com January 22, 2004 http://moonflare.com/code/select/select.pdf

Parameters

[in,out]	a	double* array to select from
[in]	size	magma_int_t size of array
[in]	k	magma_int_t k-th smallest element
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dsolverinfo	(	magma_d_solver_par *	solver_par,
		magma_d_preconditioner *	precond_par,
		magma_queue_t	queue
	)

Prints information about a previously called solver.

Parameters

[in]	solver_par	magma_d_solver_par* structure containing all solver information
[in,out]	precond_par	magma_d_preconditioner* structure containing all preconditioner information
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dsolverinfo_free	(	magma_d_solver_par *	solver_par,
		magma_d_preconditioner *	precond_par,
		magma_queue_t	queue
	)

Frees any memory assocoiated with the verbose mode of solver_par.

The other values are set to default.

Parameters

[in,out]	solver_par	magma_d_solver_par* structure containing all solver information
[in,out]	precond_par	magma_d_preconditioner* structure containing all preconditioner information
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dsolverinfo_init	(	magma_d_solver_par *	solver_par,
		magma_d_preconditioner *	precond_par,
		magma_queue_t	queue
	)

Initializes all solver and preconditioner parameters.

Parameters

[in,out]	solver_par	magma_d_solver_par* structure containing all solver information
[in,out]	precond_par	magma_d_preconditioner* structure containing all preconditioner information
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_deigensolverinfo_init	(	magma_d_solver_par *	solver_par,
		magma_queue_t	queue
	)

Initializes space for eigensolvers.

Parameters

[in,out]	solver_par	magma_d_solver_par* structure containing all solver information
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dsort	(	double *	x,
		magma_int_t	first,
		magma_int_t	last,
		magma_queue_t	queue
	)

Sorts an array of values in increasing order.

Parameters

[in,out]	x	double* array to sort
[in]	first	magma_int_t pointer to first element
[in]	last	magma_int_t pointer to last element
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmsort	(	double *	x,
		magma_index_t *	col,
		magma_index_t *	row,
		magma_int_t	first,
		magma_int_t	last,
		magma_queue_t	queue
	)

Sorts an array of values in increasing order.

Parameters

[in,out]	x	double* array to sort
[in,out]	col	magma_index_t* Target array, will be modified during operation.
[in,out]	row	magma_index_t* Target array, will be modified during operation.
[in]	first	magma_int_t pointer to first element
[in]	last	magma_int_t pointer to last element
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dindexsort	(	magma_index_t *	x,
		magma_int_t	first,
		magma_int_t	last,
		magma_queue_t	queue
	)

Sorts an array of integers in increasing order.

Parameters

[in,out]	x	magma_index_t* array to sort
[in]	first	magma_int_t pointer to first element
[in]	last	magma_int_t pointer to last element
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dindexsortval	(	magma_index_t *	x,
		double *	y,
		magma_int_t	first,
		magma_int_t	last,
		magma_queue_t	queue
	)

Sorts an array of integers, updates a respective array of values.

Parameters

[in,out]	x	magma_index_t* array to sort
[in,out]	y	double* array to sort
[in]	first	magma_int_t pointer to first element
[in]	last	magma_int_t pointer to last element
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmorderstatistics	(	double *	val,
		magma_index_t *	col,
		magma_index_t *	row,
		magma_int_t	length,
		magma_int_t	k,
		magma_int_t	r,
		double *	element,
		magma_queue_t	queue
	)

Identifies the kth smallest/largest element in an array and reorders such that these elements come to the front.

The related arrays col and row are also reordered.

Parameters

[in,out]	val	double* Target array, will be modified during operation.
[in,out]	col	magma_index_t* Target array, will be modified during operation.
[in,out]	row	magma_index_t* Target array, will be modified during operation.
[in]	length	magma_int_t Length of the target array.
[in]	k	magma_int_t Element to be identified (largest/smallest).
[in]	r	magma_int_t rule how to sort: '1' -> largest, '0' -> smallest
[out]	element	double* location of the respective element
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dorderstatistics	(	double *	val,
		magma_int_t	length,
		magma_int_t	k,
		magma_int_t	r,
		double *	element,
		magma_queue_t	queue
	)

Identifies the kth smallest/largest element in an array.

Parameters

[in,out]	val	double* Target array, will be modified during operation.
[in]	length	magma_int_t Length of the target array.
[in]	k	magma_int_t Element to be identified (largest/smallest).
[in]	r	magma_int_t rule how to sort: '1' -> largest, '0' -> smallest
[out]	element	double* location of the respective element
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dorderstatistics_inc	(	double *	val,
		magma_int_t	length,
		magma_int_t	k,
		magma_int_t	inc,
		magma_int_t	r,
		double *	element,
		magma_queue_t	queue
	)

Approximates the k-th smallest element in an array by using order-statistics with step-size inc.

Parameters

[in,out]	val	double* Target array, will be modified during operation.
[in]	length	magma_int_t Length of the target array.
[in]	k	magma_int_t Element to be identified (largest/smallest).
[in]	inc	magma_int_t Stepsize in the approximation.
[in]	r	magma_int_t rule how to sort: '1' -> largest, '0' -> smallest
[out]	element	double* location of the respective element
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dbitonic_sort	(	magma_int_t	start,
		magma_int_t	length,
		double *	seq,
		magma_int_t	flag,
		magma_queue_t	queue
	)

Approximates the k-th smallest element in an array by using order-statistics with step-size inc.

Parameters

[in]	start	magma_int_t Start position of the target array.
[in]	length	magma_int_t Length of the target array.
[in,out]	seq	double* Target array, will be modified during operation.
[in]	flag	magma_int_t ???
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparse_opts	(	int	argc,
		char **	argv,
		magma_dopts *	opts,
		int *	matrices,
		magma_queue_t	queue
	)

Parses input options for a solver.

Parameters

[in]	argc	int command line input
[in]	argv	char** command line input
[in,out]	opts	magma_dopts * magma solver options
[out]	matrices	int counter how many linear systems to process
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dvinit	(	magma_d_matrix *	x,
		magma_location_t	mem_loc,
		magma_int_t	num_rows,
		magma_int_t	num_cols,
		double	values,
		magma_queue_t	queue
	)

Allocates memory for magma_d_matrix and initializes it with the passed value.

Parameters

[out]	x	magma_d_matrix* vector to initialize
[in]	mem_loc	magma_location_t memory for vector
[in]	num_rows	magma_int_t desired length of vector
[in]	num_cols	magma_int_t desired width of vector-block (columns of dense matrix)
[in]	values	double entries in vector
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dvinit_rand	(	magma_d_matrix *	x,
		magma_location_t	mem_loc,
		magma_int_t	num_rows,
		magma_int_t	num_cols,
		magma_queue_t	queue
	)

Allocates memory for magma_d_matrix and initializes it with random values.

Parameters

[out]	x	magma_d_matrix* vector to initialize
[in]	mem_loc	magma_location_t memory for vector
[in]	num_rows	magma_int_t desired length of vector
[in]	num_cols	magma_int_t desired width of vector-block (columns of dense matrix)
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dprint_vector	(	magma_d_matrix	x,
		magma_int_t	offset,
		magma_int_t	visulen,
		magma_queue_t	queue
	)

Visualizes part of a vector of type magma_d_matrix.

With input vector x , offset, visulen, the entries offset - (offset + visulen) of x are visualized.

Parameters

[in]	x	magma_d_matrix vector to visualize
[in]	offset	magma_int_t start inex of visualization
[in]	visulen	magma_int_t number of entries to visualize
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dvread	(	magma_d_matrix *	x,
		magma_int_t	length,
		char *	filename,
		magma_queue_t	queue
	)

Reads in a double vector of length "length".

Parameters

[out]	x	magma_d_matrix * vector to read in
[in]	length	magma_int_t length of vector
[in]	filename	char* file where vector is stored
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dvspread	(	magma_d_matrix *	x,
		const char *	filename,
		magma_queue_t	queue
	)

Reads in a sparse vector-block stored in COO format.

Parameters

[out]	x	magma_d_matrix * vector to read in
[in]	filename	char* file where vector is stored
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dwrite_vector	(	magma_d_matrix	A,
		const char *	filename,
		magma_queue_t	queue
	)

Writes a vector to a file.

Parameters

[in]	A	magma_d_matrix matrix to write out
[in]	filename	const char* output-filname of the mtx matrix
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dvset	(	magma_int_t	m,
		magma_int_t	n,
		double *	val,
		magma_d_matrix *	v,
		magma_queue_t	queue
	)

Passes a vector to MAGMA.

Parameters

[in]	m	magma_int_t number of rows
[in]	n	magma_int_t number of columns
[in]	val	double* array containing vector entries
[out]	v	magma_d_matrix* magma vector
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dvcopy	(	magma_d_matrix	v,
		magma_int_t *	m,
		magma_int_t *	n,
		double *	val,
		magma_queue_t	queue
	)

Passes a MAGMA vector back.

This function requires the array val to be already allocated (of size m x n).

Parameters

[in]	v	magma_d_matrix magma vector
[out]	m	magma_int_t number of rows
[out]	n	magma_int_t number of columns
[out]	val	double* array of size m x n the vector entries are copied into
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dvset_dev	(	magma_int_t	m,
		magma_int_t	n,
		magmaDouble_ptr	val,
		magma_d_matrix *	v,
		magma_queue_t	queue
	)

Passes a vector to MAGMA (located on DEV).

Parameters

[in]	m	magma_int_t number of rows
[in]	n	magma_int_t number of columns
[in]	val	double* array containing vector entries
[out]	v	magma_d_matrix* magma vector
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dvget	(	magma_d_matrix	v,
		magma_int_t *	m,
		magma_int_t *	n,
		double **	val,
		magma_queue_t	queue
	)

Passes a MAGMA vector back.

Parameters

[in]	v	magma_d_matrix magma vector
[out]	m	magma_int_t number of rows
[out]	n	magma_int_t number of columns
[out]	val	double* array containing vector entries
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dvget_dev	(	magma_d_matrix	v,
		magma_int_t *	m,
		magma_int_t *	n,
		magmaDouble_ptr *	val,
		magma_queue_t	queue
	)

Passes a MAGMA vector back (located on DEV).

Parameters

[in]	v	magma_d_matrix magma vector
[out]	m	magma_int_t number of rows
[out]	n	magma_int_t number of columns
[out]	val	magmaDouble_ptr array containing vector entries
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dvcopy_dev	(	magma_d_matrix	v,
		magma_int_t *	m,
		magma_int_t *	n,
		magmaDouble_ptr	val,
		magma_queue_t	queue
	)

Passes a MAGMA vector back (located on DEV).

This function requires the array val to be already allocated (of size m x n).

Parameters

[in]	v	magma_d_matrix magma vector
[out]	m	magma_int_t number of rows
[out]	n	magma_int_t number of columns
[out]	val	double* array of size m x n on the device the vector entries are copied into
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dvtranspose	(	magma_d_matrix	x,
		magma_d_matrix *	y,
		magma_queue_t	queue
	)

Transposes a vector from col to row major and vice versa.

Parameters

[in]	x	magma_d_matrix input vector
[out]	y	magma_d_matrix* output vector
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_disai_generator_regs	(	magma_uplo_t	uplotype,
		magma_trans_t	transtype,
		magma_diag_t	diagtype,
		magma_d_matrix	L,
		magma_d_matrix *	M,
		magma_queue_t	queue
	)

This routine is designet to combine all kernels into one.

Parameters

[in]	uplotype	magma_uplo_t lower or upper triangular
[in]	transtype	magma_trans_t possibility for transposed matrix
[in]	diagtype	magma_diag_t unit diagonal or not
[in]	L	magma_d_matrix triangular factor for which the ISAI matrix is computed. Col-Major CSR storage.
[in,out]	M	magma_d_matrix* SPAI preconditioner CSR col-major
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dgeisai_maxblock	(	magma_d_matrix	L,
		magma_d_matrix *	MT,
		magma_queue_t	queue
	)

This routine maximizes the pattern for the ISAI preconditioner.

Precisely, it computes L, L^2, L^3, L^4, L^5 and then selects the columns of M_L such that the nonzer-per-column are the lower max than the implementation-specific limit (32).

The input is the original matrix (row-major) The output is already col-major.

Parameters

[in,out]	L	magma_d_matrix Incomplete factor.
[in,out]	MT	magma_d_matrix* SPAI preconditioner structure, CSR col-major.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmtrisolve_batched_gpu	(	magma_uplo_t	uplotype,
		magma_trans_t	transtype,
		magma_diag_t	diagtype,
		magma_d_matrix	L,
		magma_d_matrix	LC,
		magma_index_t *	sizes,
		magma_index_t *	locations,
		double *	trisystems,
		double *	rhs,
		magma_queue_t	queue
	)

Does all triangular solves.

Parameters

[in]	uplotype	magma_uplo_t lower or upper triangular
[in]	transtype	magma_trans_t possibility for transposed matrix
[in]	diagtype	magma_diag_t unit diagonal or not
[in]	L	magma_d_matrix Matrix in CSR format
[in]	LC	magma_d_matrix same matrix, also CSR, but col-major
[out]	sizes	magma_int_t* Number of Elements that are replaced.
[out]	locations	magma_int_t* Array indicating the locations.
[out]	trisystems	double* trisystems
[out]	rhs	double* right-hand sides
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dlobpcg_res	(	magma_int_t	num_rows,
		magma_int_t	num_vecs,
		magmaDouble_ptr	evalues,
		magmaDouble_ptr	X,
		magmaDouble_ptr	R,
		magmaDouble_ptr	res,
		magma_queue_t	queue
	)

This routine computes for Block-LOBPCG, the set of residuals.

                    R = Ax - x evalues

It replaces: for(int i=0; i < n; i++) { magma_daxpy(m, MAGMA_D_MAKE(-evalues[i],0),blockX+i*m,1,blockR+i*m,1); } The memory layout of x is:

/ x1[0] x2[0] x3[0] \
| x1[1] x2[1] x3[1] |

x = | x1[2] x2[2] x3[2] | = x1[0] x1[1] x1[2] x1[3] x1[4] x2[0] x2[1] . | x1[3] x2[3] x3[3] | \ x1[4] x2[4] x3[4] /

Parameters

[in]	num_rows	magma_int_t number of rows
[in]	num_vecs	magma_int_t number of vectors
[in]	evalues	magmaDouble_ptr array of eigenvalues/approximations
[in]	X	magmaDouble_ptr block of eigenvector approximations
[in]	R	magmaDouble_ptr block of residuals
[in]	res	magmaDouble_ptr array of residuals
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dlobpcg_shift	(	magma_int_t	num_rows,
		magma_int_t	num_vecs,
		magma_int_t	shift,
		magmaDouble_ptr	x,
		magma_queue_t	queue
	)

For a Block-LOBPCG, the set of residuals (entries consecutive in memory) shrinks and the vectors are shifted in case shift residuals drop below threshold.

The memory layout of x is:

/ x1[0] x2[0] x3[0] \ | x1[1] x2[1] x3[1] | x = | x1[2] x2[2] x3[2] | = x1[0] x2[0] x3[0] x1[1] x2[1] x3[1] x1[2] . | x1[3] x2[3] x3[3] | \ x1[4] x2[4] x3[4] /

Parameters

[in]	num_rows	magma_int_t number of rows
[in]	num_vecs	magma_int_t number of vectors
[in]	shift	magma_int_t shift number
[in,out]	x	magmaDouble_ptr input/output vector x
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dparilut_candidates_gpu	(	magma_d_matrix	L0,
		magma_d_matrix	U0,
		magma_d_matrix	L,
		magma_d_matrix	U,
		magma_d_matrix *	L_new,
		magma_d_matrix *	U_new,
		magma_queue_t	queue
	)

This function identifies the locations with a potential nonzero ILU residual R = A - L*U where L and U are the current incomplete factors.

Nonzero ILU residuals are possible 1 where A is nonzero but L and U have no nonzero entry 2 where the product L*U has fill-in but the location is not included in L or U

We assume that the incomplete factors are exact fro the elements included in the current pattern.

This is the GPU implementation of the candidate search.

2 GPU kernels are used: the first is a dry run assessing the memory need, the second then computes the candidate locations, the third eliminates double entries. The fourth kernel ensures the elements in a row are sorted for increasing column index.

Parameters

[in]	L0	magma_d_matrix tril(ILU(0) ) pattern of original system matrix.
[in]	U0	magma_d_matrix triu(ILU(0) ) pattern of original system matrix.
[in]	L	magma_d_matrix Current lower triangular factor.
[in]	U	magma_d_matrix Current upper triangular factor.
[in,out]	L_new	magma_d_matrix* List of candidates for L in COO format.
[in,out]	U_new	magma_d_matrix* List of candidates for U in COO format.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dcopyscale	(	magma_int_t	n,
		magma_int_t	k,
		magmaDouble_ptr	r,
		magmaDouble_ptr	v,
		magmaDouble_ptr	skp,
		magma_queue_t	queue
	)

Computes the correction term of the pipelined GMRES according to P.

Ghysels and scales and copies the new search direction

Returns the vector v = r/ ( skp[k] - (sum_i=1^k skp[i]^2) ) .

Parameters

[in]	n	int length of v_i
[in]	k	int skp entries v_i^T * r ( without r )

Parameters

[in]	r	magmaDouble_ptr vector of length n
[in]	v	magmaDouble_ptr vector of length n
[in]	skp	magmaDouble_ptr array of parameters
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_ddiagcheck	(	magma_d_matrix	dA,
		magma_queue_t	queue
	)

This routine checks for a CSR matrix whether there exists a zero on the diagonal.

This can be the diagonal entry missing or an explicit zero.

Parameters

[in]	dA	magma_d_matrix matrix in CSR format
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmatrix_cup_gpu	(	magma_d_matrix	A,
		magma_d_matrix	B,
		magma_d_matrix *	U,
		magma_queue_t	queue
	)

Generates a matrix U = A B.

If both matrices have a nonzero value in the same location, the value of A is used.

This is the GPU version of the operation.

Parameters

[in]	A	magma_d_matrix Input matrix 1.
[in]	B	magma_d_matrix Input matrix 2.
[out]	U	magma_d_matrix* U = A B. If both matrices have a nonzero value in the same location, the value of A is used.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dcsr_sort_gpu	(	magma_d_matrix *	A,
		magma_queue_t	queue
	)

Generates a matrix U = A B.

If both matrices have a nonzero value in the same location, the value of A is used.

This is the GPU version of the operation.

Parameters

[in]	A	magma_d_matrix Input matrix 1.
[in]	B	magma_d_matrix Input matrix 2.
[out]	U	magma_d_matrix* U = A B. If both matrices have a nonzero value in the same location, the value of A is used.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmconjugate	(	magma_d_matrix *	A,
		magma_queue_t	queue
	)

This function conjugates a matrix.

For a real matrix, no value is changed.

Parameters

[in,out]	A	magma_d_matrix* input/output matrix
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dmcsrcompressor_gpu	(	magma_d_matrix *	A,
		magma_queue_t	queue
	)

Removes zeros in a CSR matrix.

This is a GPU implementation of the CSR compressor.

Parameters

[in,out]	A	magma_d_matrix* input/output matrix
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dpreselect_gpu	(	magma_int_t	order,
		magma_d_matrix *	A,
		magma_d_matrix *	oneA,
		magma_queue_t	queue
	)

This function takes a list of candidates with residuals, and selects the largest in every row.

The output matrix only contains these largest elements (respectively a zero element if there is no candidate for a certain row).

Parameters

[in]	order	magma_int_t order==0 lower triangular order==1 upper triangular
[in]	A	magma_d_matrix* Matrix where elements are removed.
[out]	oneA	magma_d_matrix* Matrix where elements are removed.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dsampleselect	(	magma_int_t	total_size,
		magma_int_t	subset_size,
		double *	val,
		double *	thrs,
		magma_ptr *	tmp_ptr,
		magma_int_t *	tmp_size,
		magma_queue_t	queue
	)

This routine selects a threshold separating the subset_size smallest magnitude elements from the rest.

Parameters

[in]	total_size	magma_int_t size of array val
[in]	subset_size	magma_int_t number of smallest elements to separate
[in]	val	double array containing the values
[out]	thrs	double* computed threshold
[in,out]	tmp_ptr	magma_ptr* pointer to pointer to temporary storage. May be reallocated during execution.
[in,out]	tmp_size	magma_int_t* pointer to size of temporary storage. May be increased during execution.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dsampleselect_approx	(	magma_int_t	total_size,
		magma_int_t	subset_size,
		double *	val,
		double *	thrs,
		magma_ptr *	tmp_ptr,
		magma_int_t *	tmp_size,
		magma_queue_t	queue
	)

This routine selects an approximate threshold separating the subset_size smallest magnitude elements from the rest.

Parameters

[in]	total_size	magma_int_t size of array val
[in]	subset_size	magma_int_t number of smallest elements to separate
[in]	val	double array containing the values
[out]	thrs	double* computed threshold
[in,out]	tmp_ptr	magma_ptr* pointer to pointer to temporary storage. May be reallocated during execution.
[in,out]	tmp_size	magma_int_t* pointer to size of temporary storage. May be increased during execution.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dsampleselect_nodp	(	magma_int_t	total_size,
		magma_int_t	subset_size,
		double *	val,
		double *	thrs,
		magma_ptr *	tmp_ptr,
		magma_int_t *	tmp_size,
		magma_queue_t	queue
	)

This routine selects a threshold separating the subset_size smallest magnitude elements from the rest.

This routine does not use dynamic parallelism (DP)

Parameters

[in]	total_size	magma_int_t size of array val
[in]	subset_size	magma_int_t number of smallest elements to separate
[in]	val	double array containing the values
[out]	thrs	double* computed threshold
[in,out]	tmp_ptr	magma_ptr* pointer to pointer to temporary storage. May be reallocated during execution.
[in,out]	tmp_size	magma_int_t* pointer to size of temporary storage. May be increased during execution.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dsampleselect_approx_nodp	(	magma_int_t	total_size,
		magma_int_t	subset_size,
		double *	val,
		double *	thrs,
		magma_ptr *	tmp_ptr,
		magma_int_t *	tmp_size,
		magma_queue_t	queue
	)

This routine selects an approximate threshold separating the subset_size smallest magnitude elements from the rest.

This routine does not use dynamic parallelism (DP)

Parameters

[in]	total_size	magma_int_t size of array val
[in]	subset_size	magma_int_t number of smallest elements to separate
[in]	val	double array containing the values
[out]	thrs	double* computed threshold
[in,out]	tmp_ptr	magma_ptr* pointer to pointer to temporary storage. May be reallocated during execution.
[in,out]	tmp_size	magma_int_t* pointer to size of temporary storage. May be increased during execution.
[in]	queue	magma_queue_t Queue to execute in.

magma_int_t magma_dthrsholdrm_gpu	(	magma_int_t	order,
		magma_d_matrix *	A,
		double *	thrs,
		magma_queue_t	queue
	)

Purpose

---

This routine selects a threshold separating the subset_size smallest magnitude elements from the rest.

@param[in]
order       magma_int_t 
            dummy variable for now.

@param[in,out]
A           magma_d_matrix*  
            input/output matrix where elements are removed

@param[out]
thrs        double*  
            computed threshold

@param[in]
queue       magma_queue_t
            Queue to execute in.