LAPACK  3.7.1
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 36 of file lapacke_zhegvd.c.

40 {
41  lapack_int info = 0;
42  lapack_int liwork = -1;
43  lapack_int lrwork = -1;
44  lapack_int lwork = -1;
45  lapack_int* iwork = NULL;
46  double* rwork = NULL;
47  lapack_complex_double* work = NULL;
48  lapack_int iwork_query;
49  double rwork_query;
50  lapack_complex_double work_query;
51  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
52  LAPACKE_xerbla( "LAPACKE_zhegvd", -1 );
53  return -1;
54  }
55 #ifndef LAPACK_DISABLE_NAN_CHECK
56  /* Optionally check input matrices for NaNs */
57  if( LAPACKE_zge_nancheck( matrix_layout, n, n, a, lda ) ) {
58  return -6;
59  }
60  if( LAPACKE_zge_nancheck( matrix_layout, n, n, b, ldb ) ) {
61  return -8;
62  }
63 #endif
64  /* Query optimal working array(s) size */
65  info = LAPACKE_zhegvd_work( matrix_layout, itype, jobz, uplo, n, a, lda, b,
66  ldb, w, &work_query, lwork, &rwork_query,
67  lrwork, &iwork_query, liwork );
68  if( info != 0 ) {
69  goto exit_level_0;
70  }
71  liwork = (lapack_int)iwork_query;
72  lrwork = (lapack_int)rwork_query;
73  lwork = LAPACK_Z2INT( work_query );
74  /* Allocate memory for work arrays */
75  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
76  if( iwork == NULL ) {
78  goto exit_level_0;
79  }
80  rwork = (double*)LAPACKE_malloc( sizeof(double) * lrwork );
81  if( rwork == NULL ) {
83  goto exit_level_1;
84  }
85  work = (lapack_complex_double*)
86  LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
87  if( work == NULL ) {
89  goto exit_level_2;
90  }
91  /* Call middle-level interface */
92  info = LAPACKE_zhegvd_work( matrix_layout, itype, jobz, uplo, n, a, lda, b,
93  ldb, w, work, lwork, rwork, lrwork, iwork,
94  liwork );
95  /* Release memory and exit */
96  LAPACKE_free( work );
97 exit_level_2:
98  LAPACKE_free( rwork );
99 exit_level_1:
100  LAPACKE_free( iwork );
101 exit_level_0:
102  if( info == LAPACK_WORK_MEMORY_ERROR ) {
103  LAPACKE_xerbla( "LAPACKE_zhegvd", info );
104  }
105  return info;
106 }
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)
#define LAPACK_Z2INT(x)
Definition: lapacke.h:117
#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 lapack_complex_double
Definition: lapacke.h:90
#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_zge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *a, lapack_int lda)
Here is the call graph for this function: