LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgeqpf_work()

lapack_int LAPACKE_dgeqpf_work ( int  matrix_layout,
lapack_int  m,
lapack_int  n,
double *  a,
lapack_int  lda,
lapack_int jpvt,
double *  tau,
double *  work 
)

Definition at line 36 of file lapacke_dgeqpf_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_dgeqpf( &m, &n, a, &lda, jpvt, tau, work, &info );
44  if( info < 0 ) {
45  info = info - 1;
46  }
47  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
48  lapack_int lda_t = MAX(1,m);
49  double* a_t = NULL;
50  /* Check leading dimension(s) */
51  if( lda < n ) {
52  info = -5;
53  LAPACKE_xerbla( "LAPACKE_dgeqpf_work", info );
54  return info;
55  }
56  /* Allocate memory for temporary array(s) */
57  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
58  if( a_t == NULL ) {
60  goto exit_level_0;
61  }
62  /* Transpose input matrices */
63  LAPACKE_dge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
64  /* Call LAPACK function and adjust info */
65  LAPACK_dgeqpf( &m, &n, a_t, &lda_t, jpvt, tau, work, &info );
66  if( info < 0 ) {
67  info = info - 1;
68  }
69  /* Transpose output matrices */
70  LAPACKE_dge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
71  /* Release memory and exit */
72  LAPACKE_free( a_t );
73 exit_level_0:
74  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
75  LAPACKE_xerbla( "LAPACKE_dgeqpf_work", info );
76  }
77  } else {
78  info = -1;
79  LAPACKE_xerbla( "LAPACKE_dgeqpf_work", info );
80  }
81  return info;
82 }
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define MAX(x, y)
Definition: lapacke_utils.h:47
#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
void LAPACK_dgeqpf(lapack_int *m, lapack_int *n, double *a, lapack_int *lda, lapack_int *jpvt, double *tau, double *work, lapack_int *info)
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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