LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgemqr()

lapack_int LAPACKE_dgemqr ( int  matrix_layout,
char  side,
char  trans,
lapack_int  m,
lapack_int  n,
lapack_int  k,
const double *  a,
lapack_int  lda,
const double *  t,
lapack_int  tsize,
double *  c,
lapack_int  ldc 
)

Definition at line 36 of file lapacke_dgemqr.c.

41 {
42  lapack_int info = 0;
43  lapack_int lwork = -1;
44  double* work = NULL;
45  double work_query;
46  lapack_int r;
47  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
48  LAPACKE_xerbla( "LAPACKE_dgemqr", -1 );
49  return -1;
50  }
51 #ifndef LAPACK_DISABLE_NAN_CHECK
52  if( LAPACKE_get_nancheck() ) {
53  /* Optionally check input matrices for NaNs */
54  r = LAPACKE_lsame( side, 'l' ) ? m : n;
55  if( LAPACKE_dge_nancheck( matrix_layout, r, k, a, lda ) ) {
56  return -7;
57  }
58  if( LAPACKE_dge_nancheck( matrix_layout, m, n, c, ldc ) ) {
59  return -10;
60  }
61  if( LAPACKE_d_nancheck( tsize, t, 1 ) ) {
62  return -9;
63  }
64  }
65 #endif
66  /* Query optimal working array(s) size */
67  info = LAPACKE_dgemqr_work( matrix_layout, side, trans, m, n, k, a, lda,
68  t, tsize, c, ldc, &work_query, lwork );
69  if( info != 0 ) {
70  goto exit_level_0;
71  }
72  lwork = (lapack_int)work_query;
73  /* Allocate memory for work arrays */
74  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
75  if( work == NULL ) {
77  goto exit_level_0;
78  }
79  /* Call middle-level interface */
80  info = LAPACKE_dgemqr_work( matrix_layout, side, trans, m, n, k, a, lda,
81  t, tsize, c, ldc, work, lwork );
82  /* Release memory and exit */
83  LAPACKE_free( work );
84 exit_level_0:
85  if( info == LAPACK_WORK_MEMORY_ERROR ) {
86  LAPACKE_xerbla( "LAPACKE_dgemqr", info );
87  }
88  return info;
89 }
#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_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
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
#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_int LAPACKE_dgemqr_work(int matrix_layout, char side, char trans, lapack_int m, lapack_int n, lapack_int k, const double *a, lapack_int lda, const double *t, lapack_int tsize, double *c, lapack_int ldc, double *work, lapack_int lwork)
int LAPACKE_get_nancheck()
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