LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgeqrt_work()

lapack_int LAPACKE_dgeqrt_work ( int  matrix_layout,
lapack_int  m,
lapack_int  n,
lapack_int  nb,
double *  a,
lapack_int  lda,
double *  t,
lapack_int  ldt,
double *  work 
)

Definition at line 36 of file lapacke_dgeqrt_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_dgeqrt( &m, &n, &nb, a, &lda, t, &ldt, 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  lapack_int ldt_t = MAX(1,ldt);
50  double* a_t = NULL;
51  double* t_t = NULL;
52  /* Check leading dimension(s) */
53  if( lda < n ) {
54  info = -6;
55  LAPACKE_xerbla( "LAPACKE_dgeqrt_work", info );
56  return info;
57  }
58  if( ldt < MIN(m,n) ) {
59  info = -8;
60  LAPACKE_xerbla( "LAPACKE_dgeqrt_work", info );
61  return info;
62  }
63  /* Allocate memory for temporary array(s) */
64  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
65  if( a_t == NULL ) {
67  goto exit_level_0;
68  }
69  t_t = (double*)
70  LAPACKE_malloc( sizeof(double) * ldt_t * MAX(1,MIN(m,n)) );
71  if( t_t == NULL ) {
73  goto exit_level_1;
74  }
75  /* Transpose input matrices */
76  LAPACKE_dge_trans( matrix_layout, m, n, a, lda, a_t, lda_t );
77  /* Call LAPACK function and adjust info */
78  LAPACK_dgeqrt( &m, &n, &nb, a_t, &lda_t, t_t, &ldt_t, work, &info );
79  if( info < 0 ) {
80  info = info - 1;
81  }
82  /* Transpose output matrices */
83  LAPACKE_dge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
84  LAPACKE_dge_trans( LAPACK_COL_MAJOR, ldt, MIN(m,n), t_t, ldt_t, t,
85  ldt );
86  /* Release memory and exit */
87  LAPACKE_free( t_t );
88 exit_level_1:
89  LAPACKE_free( a_t );
90 exit_level_0:
91  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
92  LAPACKE_xerbla( "LAPACKE_dgeqrt_work", info );
93  }
94  } else {
95  info = -1;
96  LAPACKE_xerbla( "LAPACKE_dgeqrt_work", info );
97  }
98  return info;
99 }
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
void LAPACK_dgeqrt(lapack_int *m, lapack_int *n, lapack_int *nb, double *a, lapack_int *lda, double *t, lapack_int *ldt, double *work, lapack_int *info)
#define MIN(x, y)
Definition: lapacke_utils.h:50
#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
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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