LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
Loading...
Searching...
No Matches

◆ LAPACKE_dgelss_work()

lapack_int LAPACKE_dgelss_work ( int  matrix_layout,
lapack_int  m,
lapack_int  n,
lapack_int  nrhs,
double *  a,
lapack_int  lda,
double *  b,
lapack_int  ldb,
double *  s,
double  rcond,
lapack_int rank,
double *  work,
lapack_int  lwork 
)

Definition at line 35 of file lapacke_dgelss_work.c.

40{
41 lapack_int info = 0;
42 if( matrix_layout == LAPACK_COL_MAJOR ) {
43 /* Call LAPACK function and adjust info */
44 LAPACK_dgelss( &m, &n, &nrhs, a, &lda, b, &ldb, s, &rcond, rank, work,
45 &lwork, &info );
46 if( info < 0 ) {
47 info = info - 1;
48 }
49 } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50 lapack_int lda_t = MAX(1,m);
51 lapack_int ldb_t = MAX(1,MAX(m,n));
52 double* a_t = NULL;
53 double* b_t = NULL;
54 /* Check leading dimension(s) */
55 if( lda < n ) {
56 info = -6;
57 LAPACKE_xerbla( "LAPACKE_dgelss_work", info );
58 return info;
59 }
60 if( ldb < nrhs ) {
61 info = -8;
62 LAPACKE_xerbla( "LAPACKE_dgelss_work", info );
63 return info;
64 }
65 /* Query optimal working array(s) size if requested */
66 if( lwork == -1 ) {
67 LAPACK_dgelss( &m, &n, &nrhs, a, &lda_t, b, &ldb_t, s, &rcond, rank,
68 work, &lwork, &info );
69 return (info < 0) ? (info - 1) : info;
70 }
71 /* Allocate memory for temporary array(s) */
72 a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
73 if( a_t == NULL ) {
75 goto exit_level_0;
76 }
77 b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
78 if( b_t == NULL ) {
80 goto exit_level_1;
81 }
82 /* Transpose input matrices */
83 LAPACKE_dge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
84 LAPACKE_dge_trans( matrix_layout, MAX(m,n), nrhs, b, ldb, b_t, ldb_t );
85 /* Call LAPACK function and adjust info */
86 LAPACK_dgelss( &m, &n, &nrhs, a_t, &lda_t, b_t, &ldb_t, s, &rcond, rank,
87 work, &lwork, &info );
88 if( info < 0 ) {
89 info = info - 1;
90 }
91 /* Transpose output matrices */
92 LAPACKE_dge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
93 LAPACKE_dge_trans( LAPACK_COL_MAJOR, MAX(m,n), nrhs, b_t, ldb_t, b,
94 ldb );
95 /* Release memory and exit */
96 LAPACKE_free( b_t );
97exit_level_1:
98 LAPACKE_free( a_t );
99exit_level_0:
100 if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
101 LAPACKE_xerbla( "LAPACKE_dgelss_work", info );
102 }
103 } else {
104 info = -1;
105 LAPACKE_xerbla( "LAPACKE_dgelss_work", info );
106 }
107 return info;
108}
#define LAPACK_dgelss
Definition: lapack.h:2335
#define lapack_int
Definition: lapack.h:87
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
void LAPACKE_xerbla(const char *name, lapack_int info)
#define MAX(x, y)
Definition: lapacke_utils.h:46
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
Here is the call graph for this function:
Here is the caller graph for this function: