LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zgelss()

lapack_int LAPACKE_zgelss ( 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_zgelss.c.

40 {
41  lapack_int info = 0;
42  lapack_int lwork = -1;
43  double* rwork = NULL;
44  lapack_complex_double* work = NULL;
45  lapack_complex_double work_query;
46  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
47  LAPACKE_xerbla( "LAPACKE_zgelss", -1 );
48  return -1;
49  }
50 #ifndef LAPACK_DISABLE_NAN_CHECK
51  if( LAPACKE_get_nancheck() ) {
52  /* Optionally check input matrices for NaNs */
53  if( LAPACKE_zge_nancheck( matrix_layout, m, n, a, lda ) ) {
54  return -5;
55  }
56  if( LAPACKE_zge_nancheck( matrix_layout, MAX(m,n), nrhs, b, ldb ) ) {
57  return -7;
58  }
59  if( LAPACKE_d_nancheck( 1, &rcond, 1 ) ) {
60  return -10;
61  }
62  }
63 #endif
64  /* Allocate memory for working array(s) */
65  rwork = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,5*MIN(m,n)) );
66  if( rwork == NULL ) {
68  goto exit_level_0;
69  }
70  /* Query optimal working array(s) size */
71  info = LAPACKE_zgelss_work( matrix_layout, m, n, nrhs, a, lda, b, ldb, s,
72  rcond, rank, &work_query, lwork, rwork );
73  if( info != 0 ) {
74  goto exit_level_1;
75  }
76  lwork = LAPACK_Z2INT( work_query );
77  /* Allocate memory for work arrays */
78  work = (lapack_complex_double*)
79  LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
80  if( work == NULL ) {
82  goto exit_level_1;
83  }
84  /* Call middle-level interface */
85  info = LAPACKE_zgelss_work( matrix_layout, m, n, nrhs, a, lda, b, ldb, s,
86  rcond, rank, work, lwork, rwork );
87  /* Release memory and exit */
88  LAPACKE_free( work );
89 exit_level_1:
90  LAPACKE_free( rwork );
91 exit_level_0:
92  if( info == LAPACK_WORK_MEMORY_ERROR ) {
93  LAPACKE_xerbla( "LAPACKE_zgelss", info );
94  }
95  return info;
96 }
#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
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)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
#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 MIN(x, y)
Definition: lapacke_utils.h:49
#define MAX(x, y)
Definition: lapacke_utils.h:46
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