LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dtrsen()

lapack_int LAPACKE_dtrsen ( 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 
)

Definition at line 36 of file lapacke_dtrsen.c.

41 {
42  lapack_int info = 0;
43  lapack_int liwork = -1;
44  lapack_int lwork = -1;
45  lapack_int* iwork = NULL;
46  double* work = NULL;
47  lapack_int iwork_query;
48  double work_query;
49  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
50  LAPACKE_xerbla( "LAPACKE_dtrsen", -1 );
51  return -1;
52  }
53 #ifndef LAPACK_DISABLE_NAN_CHECK
54  /* Optionally check input matrices for NaNs */
55  if( LAPACKE_lsame( compq, 'v' ) ) {
56  if( LAPACKE_dge_nancheck( matrix_layout, n, n, q, ldq ) ) {
57  return -8;
58  }
59  }
60  if( LAPACKE_dge_nancheck( matrix_layout, n, n, t, ldt ) ) {
61  return -6;
62  }
63 #endif
64  /* Query optimal working array(s) size */
65  info = LAPACKE_dtrsen_work( matrix_layout, job, compq, select, n, t, ldt, q,
66  ldq, wr, wi, m, s, sep, &work_query, lwork,
67  &iwork_query, liwork );
68  if( info != 0 ) {
69  goto exit_level_0;
70  }
71  liwork = (lapack_int)iwork_query;
72  lwork = (lapack_int)work_query;
73  /* Allocate memory for work arrays */
74  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
75  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
76  if( iwork == NULL ) {
78  goto exit_level_0;
79  }
80  }
81  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
82  if( work == NULL ) {
84  goto exit_level_1;
85  }
86  /* Call middle-level interface */
87  info = LAPACKE_dtrsen_work( matrix_layout, job, compq, select, n, t, ldt, q,
88  ldq, wr, wi, m, s, sep, work, lwork, iwork,
89  liwork );
90  /* Release memory and exit */
91  LAPACKE_free( work );
92 exit_level_1:
93  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'v' ) ) {
94  LAPACKE_free( iwork );
95  }
96 exit_level_0:
97  if( info == LAPACK_WORK_MEMORY_ERROR ) {
98  LAPACKE_xerbla( "LAPACKE_dtrsen", info );
99  }
100  return info;
101 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
#define LAPACKE_free(p)
Definition: lapacke.h:113
lapack_logical LAPACKE_dge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const double *a, lapack_int lda)
#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
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)
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