LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zgelsd()

lapack_int LAPACKE_zgelsd ( 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 
)

Definition at line 35 of file lapacke_zgelsd.c.

40 {
41  lapack_int info = 0;
42  lapack_int lwork = -1;
43  /* Additional scalars declarations for work arrays */
44  lapack_int liwork;
45  lapack_int lrwork;
46  lapack_int* iwork = NULL;
47  double* rwork = NULL;
48  lapack_complex_double* work = NULL;
49  lapack_int iwork_query;
50  double rwork_query;
51  lapack_complex_double work_query;
52  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
53  LAPACKE_xerbla( "LAPACKE_zgelsd", -1 );
54  return -1;
55  }
56 #ifndef LAPACK_DISABLE_NAN_CHECK
57  if( LAPACKE_get_nancheck() ) {
58  /* Optionally check input matrices for NaNs */
59  if( LAPACKE_zge_nancheck( matrix_layout, m, n, a, lda ) ) {
60  return -5;
61  }
62  if( LAPACKE_zge_nancheck( matrix_layout, MAX(m,n), nrhs, b, ldb ) ) {
63  return -7;
64  }
65  if( LAPACKE_d_nancheck( 1, &rcond, 1 ) ) {
66  return -10;
67  }
68  }
69 #endif
70  /* Query optimal working array(s) size */
71  info = LAPACKE_zgelsd_work( matrix_layout, m, n, nrhs, a, lda, b, ldb, s,
72  rcond, rank, &work_query, lwork, &rwork_query,
73  &iwork_query );
74  if( info != 0 ) {
75  goto exit_level_0;
76  }
77  liwork = iwork_query;
78  lrwork = (lapack_int)rwork_query;
79  lwork = LAPACK_Z2INT( work_query );
80  /* Allocate memory for work arrays */
81  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
82  if( iwork == NULL ) {
84  goto exit_level_0;
85  }
86  rwork = (double*)LAPACKE_malloc( sizeof(double) * lrwork );
87  if( rwork == NULL ) {
89  goto exit_level_1;
90  }
91  work = (lapack_complex_double*)
92  LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
93  if( work == NULL ) {
95  goto exit_level_2;
96  }
97  /* Call middle-level interface */
98  info = LAPACKE_zgelsd_work( matrix_layout, m, n, nrhs, a, lda, b, ldb, s,
99  rcond, rank, work, lwork, rwork, iwork );
100  /* Release memory and exit */
101  LAPACKE_free( work );
102 exit_level_2:
103  LAPACKE_free( rwork );
104 exit_level_1:
105  LAPACKE_free( iwork );
106 exit_level_0:
107  if( info == LAPACK_WORK_MEMORY_ERROR ) {
108  LAPACKE_xerbla( "LAPACKE_zgelsd", info );
109  }
110  return info;
111 }
#define lapack_int
Definition: lapack.h:83
#define lapack_complex_double
Definition: lapack.h:63
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
lapack_int LAPACKE_zgelsd_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, lapack_int *iwork)
#define LAPACK_Z2INT(x)
Definition: lapacke.h:50
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_zge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *a, lapack_int lda)
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
#define MAX(x, y)
Definition: lapacke_utils.h:46
Here is the call graph for this function: