LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zgelsy()

lapack_int LAPACKE_zgelsy ( 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,
lapack_int jpvt,
double  rcond,
lapack_int rank 
)

Definition at line 36 of file lapacke_zgelsy.c.

41 {
42  lapack_int info = 0;
43  lapack_int lwork = -1;
44  double* rwork = NULL;
45  lapack_complex_double* work = NULL;
46  lapack_complex_double work_query;
47  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
48  LAPACKE_xerbla( "LAPACKE_zgelsy", -1 );
49  return -1;
50  }
51 #ifndef LAPACK_DISABLE_NAN_CHECK
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 #endif
63  /* Allocate memory for working array(s) */
64  rwork = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,2*n) );
65  if( rwork == NULL ) {
67  goto exit_level_0;
68  }
69  /* Query optimal working array(s) size */
70  info = LAPACKE_zgelsy_work( matrix_layout, m, n, nrhs, a, lda, b, ldb, jpvt,
71  rcond, rank, &work_query, lwork, rwork );
72  if( info != 0 ) {
73  goto exit_level_1;
74  }
75  lwork = LAPACK_Z2INT( work_query );
76  /* Allocate memory for work arrays */
77  work = (lapack_complex_double*)
78  LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
79  if( work == NULL ) {
81  goto exit_level_1;
82  }
83  /* Call middle-level interface */
84  info = LAPACKE_zgelsy_work( matrix_layout, m, n, nrhs, a, lda, b, ldb, jpvt,
85  rcond, rank, work, lwork, rwork );
86  /* Release memory and exit */
87  LAPACKE_free( work );
88 exit_level_1:
89  LAPACKE_free( rwork );
90 exit_level_0:
91  if( info == LAPACK_WORK_MEMORY_ERROR ) {
92  LAPACKE_xerbla( "LAPACKE_zgelsy", info );
93  }
94  return info;
95 }
#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
lapack_int LAPACKE_zgelsy_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, lapack_int *jpvt, double rcond, lapack_int *rank, lapack_complex_double *work, lapack_int lwork, double *rwork)
#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_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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