LAPACK  3.6.1
LAPACK: Linear Algebra PACKage
lapack_int LAPACKE_dgeqr2 ( int  matrix_layout,
lapack_int  m,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  tau 
)

Definition at line 36 of file lapacke_dgeqr2.c.

38 {
39  lapack_int info = 0;
40  double* work = NULL;
41  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
42  LAPACKE_xerbla( "LAPACKE_dgeqr2", -1 );
43  return -1;
44  }
45 #ifndef LAPACK_DISABLE_NAN_CHECK
46  /* Optionally check input matrices for NaNs */
47  if( LAPACKE_dge_nancheck( matrix_layout, m, n, a, lda ) ) {
48  return -4;
49  }
50 #endif
51  /* Allocate memory for working array(s) */
52  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,n) );
53  if( work == NULL ) {
55  goto exit_level_0;
56  }
57  /* Call middle-level interface */
58  info = LAPACKE_dgeqr2_work( matrix_layout, m, n, a, lda, tau, work );
59  /* Release memory and exit */
60  LAPACKE_free( work );
61 exit_level_0:
62  if( info == LAPACK_WORK_MEMORY_ERROR ) {
63  LAPACKE_xerbla( "LAPACKE_dgeqr2", info );
64  }
65  return info;
66 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
lapack_int LAPACKE_dgeqr2_work(int matrix_layout, lapack_int m, lapack_int n, double *a, lapack_int lda, double *tau, double *work)
#define MAX(x, y)
Definition: lapacke_utils.h:47
lapack_logical LAPACKE_dge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const double *a, lapack_int lda)
#define LAPACKE_free(p)
Definition: lapacke.h:113
#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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