LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgeqr()

lapack_int LAPACKE_dgeqr ( int  matrix_layout,
lapack_int  m,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  t,
lapack_int  tsize 
)

Definition at line 36 of file lapacke_dgeqr.c.

39 {
40  lapack_int info = 0;
41  lapack_int lwork = -1;
42  double* work = NULL;
43  double work_query;
44  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
45  LAPACKE_xerbla( "LAPACKE_dgeqr", -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_dge_nancheck( matrix_layout, m, n, a, lda ) ) {
52  return -4;
53  }
54  }
55 #endif
56  /* Query optimal working array(s) size */
57  info = LAPACKE_dgeqr_work( matrix_layout, m, n, a, lda, t, tsize, &work_query,
58  lwork );
59  if( info != 0 ) {
60  goto exit_level_0;
61  }
62  if( tsize == -1 || tsize == -2 ) {
63  goto exit_level_0;
64  }
65  lwork = (lapack_int)work_query;
66  /* Allocate memory for work arrays */
67  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
68  if( work == NULL ) {
70  goto exit_level_0;
71  }
72  /* Call middle-level interface */
73  info = LAPACKE_dgeqr_work( matrix_layout, m, n, a, lda, t, tsize, work, lwork );
74  /* Release memory and exit */
75  LAPACKE_free( work );
76 exit_level_0:
77  if( info == LAPACK_WORK_MEMORY_ERROR ) {
78  LAPACKE_xerbla( "LAPACKE_dgeqr", info );
79  }
80  return info;
81 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
lapack_int LAPACKE_dgeqr_work(int matrix_layout, lapack_int m, lapack_int n, double *a, lapack_int lda, double *t, lapack_int tsize, double *work, lapack_int lwork)
#define LAPACKE_free(p)
Definition: lapacke.h:113
lapack_logical LAPACKE_dge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const double *a, lapack_int lda)
#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
int LAPACKE_get_nancheck()
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