LAPACK  3.6.1 LAPACK: Linear Algebra PACKage
 lapack_int LAPACKE_dormqr_work ( int matrix_layout, 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_dormqr_work.c.

41 {
42  lapack_int info = 0;
43  lapack_int r;
44  lapack_int lda_t, ldc_t;
45  double *a_t = NULL, *c_t = NULL;
46  if( matrix_layout == LAPACK_COL_MAJOR ) {
47  /* Call LAPACK function and adjust info */
48  LAPACK_dormqr( &side, &trans, &m, &n, &k, a, &lda, tau, c, &ldc, work,
49  &lwork, &info );
50  if( info < 0 ) {
51  info = info - 1;
52  }
53  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
54  r = LAPACKE_lsame( side, 'l' ) ? m : n;
55  lda_t = MAX(1,r);
56  ldc_t = MAX(1,m);
57  /* Check leading dimension(s) */
58  if( lda < k ) {
59  info = -8;
60  LAPACKE_xerbla( "LAPACKE_dormqr_work", info );
61  return info;
62  }
63  if( ldc < n ) {
64  info = -11;
65  LAPACKE_xerbla( "LAPACKE_dormqr_work", info );
66  return info;
67  }
68  /* Query optimal working array(s) size if requested */
69  if( lwork == -1 ) {
70  LAPACK_dormqr( &side, &trans, &m, &n, &k, a, &lda_t, tau, c, &ldc_t,
71  work, &lwork, &info );
72  return (info < 0) ? (info - 1) : info;
73  }
74  /* Allocate memory for temporary array(s) */
75  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,k) );
76  if( a_t == NULL ) {
78  goto exit_level_0;
79  }
80  c_t = (double*)LAPACKE_malloc( sizeof(double) * ldc_t * MAX(1,n) );
81  if( c_t == NULL ) {
83  goto exit_level_1;
84  }
85  /* Transpose input matrices */
86  LAPACKE_dge_trans( matrix_layout, r, k, a, lda, a_t, lda_t );
87  LAPACKE_dge_trans( matrix_layout, m, n, c, ldc, c_t, ldc_t );
88  /* Call LAPACK function and adjust info */
89  LAPACK_dormqr( &side, &trans, &m, &n, &k, a_t, &lda_t, tau, c_t, &ldc_t,
90  work, &lwork, &info );
91  if( info < 0 ) {
92  info = info - 1;
93  }
94  /* Transpose output matrices */
95  LAPACKE_dge_trans( LAPACK_COL_MAJOR, m, n, c_t, ldc_t, c, ldc );
96  /* Release memory and exit */
97  LAPACKE_free( c_t );
98 exit_level_1:
99  LAPACKE_free( a_t );
100 exit_level_0:
101  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
102  LAPACKE_xerbla( "LAPACKE_dormqr_work", info );
103  }
104  } else {
105  info = -1;
106  LAPACKE_xerbla( "LAPACKE_dormqr_work", info );
107  }
108  return info;
109 }
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 MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
void LAPACK_dormqr(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)
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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