LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zhegvd()

lapack_int LAPACKE_zhegvd ( int  matrix_layout,
lapack_int  itype,
char  jobz,
char  uplo,
lapack_int  n,
lapack_complex_double a,
lapack_int  lda,
lapack_complex_double b,
lapack_int  ldb,
double *  w 
)

Definition at line 35 of file lapacke_zhegvd.c.

39 {
40  lapack_int info = 0;
41  lapack_int liwork = -1;
42  lapack_int lrwork = -1;
43  lapack_int lwork = -1;
44  lapack_int* iwork = NULL;
45  double* rwork = NULL;
46  lapack_complex_double* work = NULL;
47  lapack_int iwork_query;
48  double rwork_query;
49  lapack_complex_double work_query;
50  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
51  LAPACKE_xerbla( "LAPACKE_zhegvd", -1 );
52  return -1;
53  }
54 #ifndef LAPACK_DISABLE_NAN_CHECK
55  if( LAPACKE_get_nancheck() ) {
56  /* Optionally check input matrices for NaNs */
57  if( LAPACKE_zhe_nancheck( matrix_layout, uplo, n, a, lda ) ) {
58  return -6;
59  }
60  if( LAPACKE_zhe_nancheck( matrix_layout, uplo, n, b, ldb ) ) {
61  return -8;
62  }
63  }
64 #endif
65  /* Query optimal working array(s) size */
66  info = LAPACKE_zhegvd_work( matrix_layout, itype, jobz, uplo, n, a, lda, b,
67  ldb, w, &work_query, lwork, &rwork_query,
68  lrwork, &iwork_query, liwork );
69  if( info != 0 ) {
70  goto exit_level_0;
71  }
72  liwork = iwork_query;
73  lrwork = (lapack_int)rwork_query;
74  lwork = LAPACK_Z2INT( work_query );
75  /* Allocate memory for work arrays */
76  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
77  if( iwork == NULL ) {
79  goto exit_level_0;
80  }
81  rwork = (double*)LAPACKE_malloc( sizeof(double) * lrwork );
82  if( rwork == NULL ) {
84  goto exit_level_1;
85  }
86  work = (lapack_complex_double*)
87  LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
88  if( work == NULL ) {
90  goto exit_level_2;
91  }
92  /* Call middle-level interface */
93  info = LAPACKE_zhegvd_work( matrix_layout, itype, jobz, uplo, n, a, lda, b,
94  ldb, w, work, lwork, rwork, lrwork, iwork,
95  liwork );
96  /* Release memory and exit */
97  LAPACKE_free( work );
98 exit_level_2:
99  LAPACKE_free( rwork );
100 exit_level_1:
101  LAPACKE_free( iwork );
102 exit_level_0:
103  if( info == LAPACK_WORK_MEMORY_ERROR ) {
104  LAPACKE_xerbla( "LAPACKE_zhegvd", info );
105  }
106  return info;
107 }
#define lapack_int
Definition: lapack.h:83
#define lapack_complex_double
Definition: lapack.h:63
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
#define LAPACK_Z2INT(x)
Definition: lapacke.h:50
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
lapack_int LAPACKE_zhegvd_work(int matrix_layout, lapack_int itype, char jobz, char uplo, lapack_int n, lapack_complex_double *a, lapack_int lda, lapack_complex_double *b, lapack_int ldb, double *w, lapack_complex_double *work, lapack_int lwork, double *rwork, lapack_int lrwork, lapack_int *iwork, lapack_int liwork)
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_zhe_nancheck(int matrix_layout, char uplo, lapack_int n, const lapack_complex_double *a, lapack_int lda)
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