LAPACK  3.10.0
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 35 of file lapacke_zungqr.c.

38 {
39  lapack_int info = 0;
40  lapack_int lwork = -1;
41  lapack_complex_double* work = NULL;
42  lapack_complex_double work_query;
43  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
44  LAPACKE_xerbla( "LAPACKE_zungqr", -1 );
45  return -1;
46  }
47 #ifndef LAPACK_DISABLE_NAN_CHECK
48  if( LAPACKE_get_nancheck() ) {
49  /* Optionally check input matrices for NaNs */
50  if( LAPACKE_zge_nancheck( matrix_layout, m, n, a, lda ) ) {
51  return -5;
52  }
53  if( LAPACKE_z_nancheck( k, tau, 1 ) ) {
54  return -7;
55  }
56  }
57 #endif
58  /* Query optimal working array(s) size */
59  info = LAPACKE_zungqr_work( matrix_layout, m, n, k, a, lda, tau, &work_query,
60  lwork );
61  if( info != 0 ) {
62  goto exit_level_0;
63  }
64  lwork = LAPACK_Z2INT( work_query );
65  /* Allocate memory for work arrays */
66  work = (lapack_complex_double*)
67  LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
68  if( work == NULL ) {
70  goto exit_level_0;
71  }
72  /* Call middle-level interface */
73  info = LAPACKE_zungqr_work( matrix_layout, m, n, k, a, lda, tau, work,
74  lwork );
75  /* Release memory and exit */
76  LAPACKE_free( work );
77 exit_level_0:
78  if( info == LAPACK_WORK_MEMORY_ERROR ) {
79  LAPACKE_xerbla( "LAPACKE_zungqr", info );
80  }
81  return info;
82 }
#define lapack_int
Definition: lapack.h:83
#define lapack_complex_double
Definition: lapack.h:63
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 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)
#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_z_nancheck(lapack_int n, const lapack_complex_double *x, lapack_int incx)
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