LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zungql_work()

lapack_int LAPACKE_zungql_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 
)

Definition at line 36 of file lapacke_zungql_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_zungql( &m, &n, &k, a, &lda, tau, work, &lwork, &info );
46  if( info < 0 ) {
47  info = info - 1;
48  }
49  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50  lapack_int lda_t = MAX(1,m);
51  lapack_complex_double* a_t = NULL;
52  /* Check leading dimension(s) */
53  if( lda < n ) {
54  info = -6;
55  LAPACKE_xerbla( "LAPACKE_zungql_work", info );
56  return info;
57  }
58  /* Query optimal working array(s) size if requested */
59  if( lwork == -1 ) {
60  LAPACK_zungql( &m, &n, &k, a, &lda_t, tau, work, &lwork, &info );
61  return (info < 0) ? (info - 1) : info;
62  }
63  /* Allocate memory for temporary array(s) */
64  a_t = (lapack_complex_double*)
65  LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
66  if( a_t == NULL ) {
68  goto exit_level_0;
69  }
70  /* Transpose input matrices */
71  LAPACKE_zge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
72  /* Call LAPACK function and adjust info */
73  LAPACK_zungql( &m, &n, &k, a_t, &lda_t, tau, work, &lwork, &info );
74  if( info < 0 ) {
75  info = info - 1;
76  }
77  /* Transpose output matrices */
78  LAPACKE_zge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
79  /* Release memory and exit */
80  LAPACKE_free( a_t );
81 exit_level_0:
82  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
83  LAPACKE_xerbla( "LAPACKE_zungql_work", info );
84  }
85  } else {
86  info = -1;
87  LAPACKE_xerbla( "LAPACKE_zungql_work", info );
88  }
89  return info;
90 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#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
void LAPACK_zungql(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, lapack_int *info)
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
void LAPACKE_zge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
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