LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsyev_2stage()

lapack_int LAPACKE_dsyev_2stage ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  w 
)

Definition at line 36 of file lapacke_dsyev_2stage.c.

38 {
39  lapack_int info = 0;
40  lapack_int lwork = -1;
41  double* work = NULL;
42  double work_query;
43  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
44  LAPACKE_xerbla( "LAPACKE_dsyev_2stage", -1 );
45  return -1;
46  }
47 #ifndef LAPACK_DISABLE_NAN_CHECK
48  if( LAPACKE_get_nancheck() ) {
49  /* Optionally check input matrices for NaNs */
50  if( LAPACKE_dsy_nancheck( matrix_layout, uplo, n, a, lda ) ) {
51  return -5;
52  }
53  }
54 #endif
55  /* Query optimal working array(s) size */
56  info = LAPACKE_dsyev_2stage_work( matrix_layout, jobz, uplo, n, a, lda, w,
57  &work_query, lwork );
58  if( info != 0 ) {
59  goto exit_level_0;
60  }
61  lwork = (lapack_int)work_query;
62  /* Allocate memory for work arrays */
63  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
64  if( work == NULL ) {
66  goto exit_level_0;
67  }
68  /* Call middle-level interface */
69  info = LAPACKE_dsyev_2stage_work( matrix_layout, jobz, uplo, n, a, lda, w, work,
70  lwork );
71  /* Release memory and exit */
72  LAPACKE_free( work );
73 exit_level_0:
74  if( info == LAPACK_WORK_MEMORY_ERROR ) {
75  LAPACKE_xerbla( "LAPACKE_dsyev_2stage", info );
76  }
77  return info;
78 }
lapack_int LAPACKE_dsyev_2stage_work(int matrix_layout, char jobz, char uplo, lapack_int n, double *a, lapack_int lda, double *w, double *work, lapack_int lwork)
#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
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#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_logical LAPACKE_dsy_nancheck(int matrix_layout, char uplo, lapack_int n, const double *a, lapack_int lda)
int LAPACKE_get_nancheck()
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