LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dormtr_work()

lapack_int LAPACKE_dormtr_work ( int  matrix_layout,
char  side,
char  uplo,
char  trans,
lapack_int  m,
lapack_int  n,
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_dormtr_work.c.

41 {
42  lapack_int info = 0;
43  lapack_int r, lda_t, ldc_t;
44  double *a_t = NULL, *c_t = NULL;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_dormtr( &side, &uplo, &trans, &m, &n, a, &lda, tau, c, &ldc,
48  work, &lwork, &info );
49  if( info < 0 ) {
50  info = info - 1;
51  }
52  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
53  r = LAPACKE_lsame( side, 'l' ) ? m : n;
54  lda_t = MAX(1,r);
55  ldc_t = MAX(1,m);
56  /* Check leading dimension(s) */
57  if( lda < r ) {
58  info = -8;
59  LAPACKE_xerbla( "LAPACKE_dormtr_work", info );
60  return info;
61  }
62  if( ldc < n ) {
63  info = -11;
64  LAPACKE_xerbla( "LAPACKE_dormtr_work", info );
65  return info;
66  }
67  /* Query optimal working array(s) size if requested */
68  if( lwork == -1 ) {
69  LAPACK_dormtr( &side, &uplo, &trans, &m, &n, a, &lda_t, tau, c,
70  &ldc_t, work, &lwork, &info );
71  return (info < 0) ? (info - 1) : info;
72  }
73  /* Allocate memory for temporary array(s) */
74  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,r) );
75  if( a_t == NULL ) {
77  goto exit_level_0;
78  }
79  c_t = (double*)LAPACKE_malloc( sizeof(double) * ldc_t * MAX(1,n) );
80  if( c_t == NULL ) {
82  goto exit_level_1;
83  }
84  /* Transpose input matrices */
85  LAPACKE_dge_trans( matrix_layout, r, r, a, lda, a_t, lda_t );
86  LAPACKE_dge_trans( matrix_layout, m, n, c, ldc, c_t, ldc_t );
87  /* Call LAPACK function and adjust info */
88  LAPACK_dormtr( &side, &uplo, &trans, &m, &n, a_t, &lda_t, tau, c_t,
89  &ldc_t, work, &lwork, &info );
90  if( info < 0 ) {
91  info = info - 1;
92  }
93  /* Transpose output matrices */
94  LAPACKE_dge_trans( LAPACK_COL_MAJOR, m, n, c_t, ldc_t, c, ldc );
95  /* Release memory and exit */
96  LAPACKE_free( c_t );
97 exit_level_1:
98  LAPACKE_free( a_t );
99 exit_level_0:
100  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
101  LAPACKE_xerbla( "LAPACKE_dormtr_work", info );
102  }
103  } else {
104  info = -1;
105  LAPACKE_xerbla( "LAPACKE_dormtr_work", info );
106  }
107  return info;
108 }
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
void LAPACK_dormtr(char *side, char *uplo, char *trans, lapack_int *m, lapack_int *n, const double *a, lapack_int *lda, const double *tau, double *c, lapack_int *ldc, double *work, lapack_int *lwork, lapack_int *info)
#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
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
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