LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dtrexc()

lapack_int LAPACKE_dtrexc ( int  matrix_layout,
char  compq,
lapack_int  n,
double *  t,
lapack_int  ldt,
double *  q,
lapack_int  ldq,
lapack_int ifst,
lapack_int ilst 
)

Definition at line 36 of file lapacke_dtrexc.c.

39 {
40  lapack_int info = 0;
41  double* work = NULL;
42  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
43  LAPACKE_xerbla( "LAPACKE_dtrexc", -1 );
44  return -1;
45  }
46 #ifndef LAPACK_DISABLE_NAN_CHECK
47  if( LAPACKE_get_nancheck() ) {
48  /* Optionally check input matrices for NaNs */
49  if( LAPACKE_lsame( compq, 'v' ) ) {
50  if( LAPACKE_dge_nancheck( matrix_layout, n, n, q, ldq ) ) {
51  return -6;
52  }
53  }
54  if( LAPACKE_dge_nancheck( matrix_layout, n, n, t, ldt ) ) {
55  return -4;
56  }
57  }
58 #endif
59  /* Allocate memory for working array(s) */
60  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,n) );
61  if( work == NULL ) {
63  goto exit_level_0;
64  }
65  /* Call middle-level interface */
66  info = LAPACKE_dtrexc_work( matrix_layout, compq, n, t, ldt, q, ldq, ifst,
67  ilst, work );
68  /* Release memory and exit */
69  LAPACKE_free( work );
70 exit_level_0:
71  if( info == LAPACK_WORK_MEMORY_ERROR ) {
72  LAPACKE_xerbla( "LAPACKE_dtrexc", info );
73  }
74  return info;
75 }
#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_int LAPACKE_dtrexc_work(int matrix_layout, char compq, lapack_int n, double *t, lapack_int ldt, double *q, lapack_int ldq, lapack_int *ifst, lapack_int *ilst, double *work)
#define MAX(x, y)
Definition: lapacke_utils.h:47
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
int LAPACKE_get_nancheck()
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