LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zungqr()

lapack_int LAPACKE_zungqr ( int  matrix_layout,
lapack_int  m,
lapack_int  n,
lapack_int  k,
lapack_complex_double a,
lapack_int  lda,
const lapack_complex_double tau 
)

Definition at line 36 of file lapacke_zungqr.c.

39 {
40  lapack_int info = 0;
41  lapack_int lwork = -1;
42  lapack_complex_double* work = NULL;
43  lapack_complex_double work_query;
44  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
45  LAPACKE_xerbla( "LAPACKE_zungqr", -1 );
46  return -1;
47  }
48 #ifndef LAPACK_DISABLE_NAN_CHECK
49  if( LAPACKE_get_nancheck() ) {
50  /* Optionally check input matrices for NaNs */
51  if( LAPACKE_zge_nancheck( matrix_layout, m, n, a, lda ) ) {
52  return -5;
53  }
54  if( LAPACKE_z_nancheck( k, tau, 1 ) ) {
55  return -7;
56  }
57  }
58 #endif
59  /* Query optimal working array(s) size */
60  info = LAPACKE_zungqr_work( matrix_layout, m, n, k, a, lda, tau, &work_query,
61  lwork );
62  if( info != 0 ) {
63  goto exit_level_0;
64  }
65  lwork = LAPACK_Z2INT( work_query );
66  /* Allocate memory for work arrays */
67  work = (lapack_complex_double*)
68  LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
69  if( work == NULL ) {
71  goto exit_level_0;
72  }
73  /* Call middle-level interface */
74  info = LAPACKE_zungqr_work( matrix_layout, m, n, k, a, lda, tau, work,
75  lwork );
76  /* Release memory and exit */
77  LAPACKE_free( work );
78 exit_level_0:
79  if( info == LAPACK_WORK_MEMORY_ERROR ) {
80  LAPACKE_xerbla( "LAPACKE_zungqr", info );
81  }
82  return info;
83 }
#define LAPACK_Z2INT(x)
Definition: lapacke.h:117
lapack_logical LAPACKE_z_nancheck(lapack_int n, const lapack_complex_double *x, lapack_int incx)
#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_zungqr_work(int matrix_layout, lapack_int m, lapack_int n, lapack_int k, lapack_complex_double *a, lapack_int lda, const lapack_complex_double *tau, lapack_complex_double *work, lapack_int lwork)
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#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)
int LAPACKE_get_nancheck()
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