LAPACK  3.7.1
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 36 of file lapacke_zgelsd.c.

41 {
42  lapack_int info = 0;
43  lapack_int lwork = -1;
44  /* Additional scalars declarations for work arrays */
45  lapack_int liwork;
46  lapack_int lrwork;
47  lapack_int* iwork = NULL;
48  double* rwork = NULL;
49  lapack_complex_double* work = NULL;
50  lapack_int iwork_query;
51  double rwork_query;
52  lapack_complex_double work_query;
53  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
54  LAPACKE_xerbla( "LAPACKE_zgelsd", -1 );
55  return -1;
56  }
57 #ifndef LAPACK_DISABLE_NAN_CHECK
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 #endif
69  /* Query optimal working array(s) size */
70  info = LAPACKE_zgelsd_work( matrix_layout, m, n, nrhs, a, lda, b, ldb, s,
71  rcond, rank, &work_query, lwork, &rwork_query,
72  &iwork_query );
73  if( info != 0 ) {
74  goto exit_level_0;
75  }
76  liwork = (lapack_int)iwork_query;
77  lrwork = (lapack_int)rwork_query;
78  lwork = LAPACK_Z2INT( work_query );
79  /* Allocate memory for work arrays */
80  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
81  if( iwork == NULL ) {
83  goto exit_level_0;
84  }
85  rwork = (double*)LAPACKE_malloc( sizeof(double) * lrwork );
86  if( rwork == NULL ) {
88  goto exit_level_1;
89  }
90  work = (lapack_complex_double*)
91  LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
92  if( work == NULL ) {
94  goto exit_level_2;
95  }
96  /* Call middle-level interface */
97  info = LAPACKE_zgelsd_work( matrix_layout, m, n, nrhs, a, lda, b, ldb, s,
98  rcond, rank, work, lwork, rwork, iwork );
99  /* Release memory and exit */
100  LAPACKE_free( work );
101 exit_level_2:
102  LAPACKE_free( rwork );
103 exit_level_1:
104  LAPACKE_free( iwork );
105 exit_level_0:
106  if( info == LAPACK_WORK_MEMORY_ERROR ) {
107  LAPACKE_xerbla( "LAPACKE_zgelsd", info );
108  }
109  return info;
110 }
#define LAPACK_Z2INT(x)
Definition: lapacke.h:117
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_double
Definition: lapacke.h:90
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
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)
lapack_logical LAPACKE_zge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *a, lapack_int lda)
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