LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dtrsen_work()

lapack_int LAPACKE_dtrsen_work ( int  matrix_layout,
char  job,
char  compq,
const lapack_logical select,
lapack_int  n,
double *  t,
lapack_int  ldt,
double *  q,
lapack_int  ldq,
double *  wr,
double *  wi,
lapack_int m,
double *  s,
double *  sep,
double *  work,
lapack_int  lwork,
lapack_int iwork,
lapack_int  liwork 
)

Definition at line 36 of file lapacke_dtrsen_work.c.

43 {
44  lapack_int info = 0;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_dtrsen( &job, &compq, select, &n, t, &ldt, q, &ldq, wr, wi, m, s,
48  sep, work, &lwork, iwork, &liwork, &info );
49  if( info < 0 ) {
50  info = info - 1;
51  }
52  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
53  lapack_int ldq_t = MAX(1,n);
54  lapack_int ldt_t = MAX(1,n);
55  double* t_t = NULL;
56  double* q_t = NULL;
57  /* Check leading dimension(s) */
58  if( ldq < n ) {
59  info = -9;
60  LAPACKE_xerbla( "LAPACKE_dtrsen_work", info );
61  return info;
62  }
63  if( ldt < n ) {
64  info = -7;
65  LAPACKE_xerbla( "LAPACKE_dtrsen_work", info );
66  return info;
67  }
68  /* Allocate memory for temporary array T */
69  t_t = (double*)LAPACKE_malloc( sizeof(double) * ldt_t * MAX(1,n) );
70  if( t_t == NULL ) {
72  goto exit_level_0;
73  }
74  /* Transpose input matrix T */
75  LAPACKE_dge_trans( matrix_layout, n, n, t, ldt, t_t, ldt_t );
76  /* Query optimal working array(s) size if requested */
77  if( liwork == -1 || lwork == -1 ) {
78  LAPACK_dtrsen( &job, &compq, select, &n, t_t, &ldt_t, q, &ldq_t, wr,
79  wi, m, s, sep, work, &lwork, iwork, &liwork, &info );
80  LAPACKE_free( t_t );
81  return (info < 0) ? (info - 1) : info;
82  }
83  /* Allocate memory for temporary array(s) */
84  if( LAPACKE_lsame( compq, 'v' ) ) {
85  q_t = (double*)LAPACKE_malloc( sizeof(double) * ldq_t * MAX(1,n) );
86  if( q_t == NULL ) {
88  goto exit_level_1;
89  }
90  }
91  /* Transpose input matrices */
92  if( LAPACKE_lsame( compq, 'v' ) ) {
93  LAPACKE_dge_trans( matrix_layout, n, n, q, ldq, q_t, ldq_t );
94  }
95  /* Call LAPACK function and adjust info */
96  LAPACK_dtrsen( &job, &compq, select, &n, t_t, &ldt_t, q_t, &ldq_t, wr,
97  wi, m, s, sep, work, &lwork, iwork, &liwork, &info );
98  if( info < 0 ) {
99  info = info - 1;
100  }
101  /* Transpose output matrices */
102  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, t_t, ldt_t, t, ldt );
103  if( LAPACKE_lsame( compq, 'v' ) ) {
104  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
105  }
106  /* Release memory and exit */
107  if( LAPACKE_lsame( compq, 'v' ) ) {
108  LAPACKE_free( q_t );
109  }
110 exit_level_1:
111  LAPACKE_free( t_t );
112 exit_level_0:
113  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
114  LAPACKE_xerbla( "LAPACKE_dtrsen_work", info );
115  }
116  } else {
117  info = -1;
118  LAPACKE_xerbla( "LAPACKE_dtrsen_work", info );
119  }
120  return info;
121 }
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_dtrsen(char *job, char *compq, const lapack_logical *select, lapack_int *n, double *t, lapack_int *ldt, double *q, lapack_int *ldq, double *wr, double *wi, lapack_int *m, double *s, double *sep, double *work, lapack_int *lwork, lapack_int *iwork, lapack_int *liwork, lapack_int *info)
#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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