LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dormbr_work()

lapack_int LAPACKE_dormbr_work ( int  matrix_layout,
char  vect,
char  side,
char  trans,
lapack_int  m,
lapack_int  n,
lapack_int  k,
const double *  a,
lapack_int  lda,
const double *  tau,
double *  c,
lapack_int  ldc,
double *  work,
lapack_int  lwork 
)

Definition at line 36 of file lapacke_dormbr_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_dormbr( &vect, &side, &trans, &m, &n, &k, a, &lda, tau, c, &ldc,
46  work, &lwork, &info );
47  if( info < 0 ) {
48  info = info - 1;
49  }
50  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
51  lapack_int nq = LAPACKE_lsame( side, 'l' ) ? m : n;
52  lapack_int ar = LAPACKE_lsame( vect, 'q' ) ? nq : MIN(nq,k);
53  lapack_int ac = LAPACKE_lsame( vect, 'q' ) ? MIN(nq,k) : nq;
54  lapack_int lda_t = MAX(1,ar);
55  lapack_int ldc_t = MAX(1,m);
56  double *a_t = NULL;
57  double *c_t = NULL;
58  /* Check leading dimension(s) */
59  if( lda < ac ) {
60  info = -9;
61  LAPACKE_xerbla( "LAPACKE_dormbr_work", info );
62  return info;
63  }
64  if( ldc < n ) {
65  info = -12;
66  LAPACKE_xerbla( "LAPACKE_dormbr_work", info );
67  return info;
68  }
69  /* Query optimal working array(s) size if requested */
70  if( lwork == -1 ) {
71  LAPACK_dormbr( &vect, &side, &trans, &m, &n, &k, a, &lda_t, tau, c,
72  &ldc_t, work, &lwork, &info );
73  return (info < 0) ? (info - 1) : info;
74  }
75  /* Allocate memory for temporary array(s) */
76  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,ac) );
77  if( a_t == NULL ) {
79  goto exit_level_0;
80  }
81  c_t = (double*)LAPACKE_malloc( sizeof(double) * ldc_t * MAX(1,n) );
82  if( c_t == NULL ) {
84  goto exit_level_1;
85  }
86  /* Transpose input matrices */
87  LAPACKE_dge_trans( matrix_layout, ar, ac, a, lda, a_t, lda_t );
88  LAPACKE_dge_trans( matrix_layout, m, n, c, ldc, c_t, ldc_t );
89  /* Call LAPACK function and adjust info */
90  LAPACK_dormbr( &vect, &side, &trans, &m, &n, &k, a_t, &lda_t, tau, c_t,
91  &ldc_t, work, &lwork, &info );
92  if( info < 0 ) {
93  info = info - 1;
94  }
95  /* Transpose output matrices */
96  LAPACKE_dge_trans( LAPACK_COL_MAJOR, m, n, c_t, ldc_t, c, ldc );
97  /* Release memory and exit */
98  LAPACKE_free( c_t );
99 exit_level_1:
100  LAPACKE_free( a_t );
101 exit_level_0:
102  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
103  LAPACKE_xerbla( "LAPACKE_dormbr_work", info );
104  }
105  } else {
106  info = -1;
107  LAPACKE_xerbla( "LAPACKE_dormbr_work", info );
108  }
109  return info;
110 }
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 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
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
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
void LAPACK_dormbr(char *vect, char *side, char *trans, lapack_int *m, lapack_int *n, lapack_int *k, const double *a, lapack_int *lda, const double *tau, double *c, lapack_int *ldc, double *work, lapack_int *lwork, lapack_int *info)
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