LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zgelss_work()

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

Definition at line 35 of file lapacke_zgelss_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_zgelss( &m, &n, &nrhs, a, &lda, b, &ldb, s, &rcond, rank, work,
46  &lwork, rwork, &info );
47  if( info < 0 ) {
48  info = info - 1;
49  }
50  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
51  lapack_int lda_t = MAX(1,m);
52  lapack_int ldb_t = MAX(1,MAX(m,n));
53  lapack_complex_double* a_t = NULL;
54  lapack_complex_double* b_t = NULL;
55  /* Check leading dimension(s) */
56  if( lda < n ) {
57  info = -6;
58  LAPACKE_xerbla( "LAPACKE_zgelss_work", info );
59  return info;
60  }
61  if( ldb < nrhs ) {
62  info = -8;
63  LAPACKE_xerbla( "LAPACKE_zgelss_work", info );
64  return info;
65  }
66  /* Query optimal working array(s) size if requested */
67  if( lwork == -1 ) {
68  LAPACK_zgelss( &m, &n, &nrhs, a, &lda_t, b, &ldb_t, s, &rcond, rank,
69  work, &lwork, rwork, &info );
70  return (info < 0) ? (info - 1) : info;
71  }
72  /* Allocate memory for temporary array(s) */
73  a_t = (lapack_complex_double*)
74  LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
75  if( a_t == NULL ) {
77  goto exit_level_0;
78  }
79  b_t = (lapack_complex_double*)
81  ldb_t * MAX(1,nrhs) );
82  if( b_t == NULL ) {
84  goto exit_level_1;
85  }
86  /* Transpose input matrices */
87  LAPACKE_zge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
88  LAPACKE_zge_trans( matrix_layout, MAX(m,n), nrhs, b, ldb, b_t, ldb_t );
89  /* Call LAPACK function and adjust info */
90  LAPACK_zgelss( &m, &n, &nrhs, a_t, &lda_t, b_t, &ldb_t, s, &rcond, rank,
91  work, &lwork, rwork, &info );
92  if( info < 0 ) {
93  info = info - 1;
94  }
95  /* Transpose output matrices */
96  LAPACKE_zge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
97  LAPACKE_zge_trans( LAPACK_COL_MAJOR, MAX(m,n), nrhs, b_t, ldb_t, b,
98  ldb );
99  /* Release memory and exit */
100  LAPACKE_free( b_t );
101 exit_level_1:
102  LAPACKE_free( a_t );
103 exit_level_0:
104  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
105  LAPACKE_xerbla( "LAPACKE_zgelss_work", info );
106  }
107  } else {
108  info = -1;
109  LAPACKE_xerbla( "LAPACKE_zgelss_work", info );
110  }
111  return info;
112 }
#define lapack_int
Definition: lapack.h:83
void LAPACK_zgelss(lapack_int const *m, lapack_int const *n, lapack_int const *nrhs, lapack_complex_double *A, lapack_int const *lda, lapack_complex_double *B, lapack_int const *ldb, double *S, double const *rcond, lapack_int *rank, lapack_complex_double *work, lapack_int const *lwork, double *rwork, lapack_int *info)
#define lapack_complex_double
Definition: lapack.h:63
#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)
void LAPACKE_zge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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