LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dggqrf()

lapack_int LAPACKE_dggqrf ( int  matrix_layout,
lapack_int  n,
lapack_int  m,
lapack_int  p,
double *  a,
lapack_int  lda,
double *  taua,
double *  b,
lapack_int  ldb,
double *  taub 
)

Definition at line 36 of file lapacke_dggqrf.c.

40 {
41  lapack_int info = 0;
42  lapack_int lwork = -1;
43  double* work = NULL;
44  double work_query;
45  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
46  LAPACKE_xerbla( "LAPACKE_dggqrf", -1 );
47  return -1;
48  }
49 #ifndef LAPACK_DISABLE_NAN_CHECK
50  /* Optionally check input matrices for NaNs */
51  if( LAPACKE_dge_nancheck( matrix_layout, n, m, a, lda ) ) {
52  return -5;
53  }
54  if( LAPACKE_dge_nancheck( matrix_layout, n, p, b, ldb ) ) {
55  return -8;
56  }
57 #endif
58  /* Query optimal working array(s) size */
59  info = LAPACKE_dggqrf_work( matrix_layout, n, m, p, a, lda, taua, b, ldb,
60  taub, &work_query, lwork );
61  if( info != 0 ) {
62  goto exit_level_0;
63  }
64  lwork = (lapack_int)work_query;
65  /* Allocate memory for work arrays */
66  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
67  if( work == NULL ) {
69  goto exit_level_0;
70  }
71  /* Call middle-level interface */
72  info = LAPACKE_dggqrf_work( matrix_layout, n, m, p, a, lda, taua, b, ldb,
73  taub, 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_dggqrf", info );
79  }
80  return info;
81 }
#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
lapack_int LAPACKE_dggqrf_work(int matrix_layout, lapack_int n, lapack_int m, lapack_int p, double *a, lapack_int lda, double *taua, double *b, lapack_int ldb, double *taub, double *work, lapack_int lwork)
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
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