LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zhpevd()

lapack_int LAPACKE_zhpevd ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
lapack_complex_double ap,
double *  w,
lapack_complex_double z,
lapack_int  ldz 
)

Definition at line 36 of file lapacke_zhpevd.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_zhpevd", -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_zhp_nancheck( n, ap ) ) {
58  return -5;
59  }
60  }
61 #endif
62  /* Query optimal working array(s) size */
63  info = LAPACKE_zhpevd_work( matrix_layout, jobz, uplo, n, ap, w, z, ldz,
64  &work_query, lwork, &rwork_query, lrwork,
65  &iwork_query, liwork );
66  if( info != 0 ) {
67  goto exit_level_0;
68  }
69  liwork = (lapack_int)iwork_query;
70  lrwork = (lapack_int)rwork_query;
71  lwork = LAPACK_Z2INT( work_query );
72  /* Allocate memory for work arrays */
73  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
74  if( iwork == NULL ) {
76  goto exit_level_0;
77  }
78  rwork = (double*)LAPACKE_malloc( sizeof(double) * lrwork );
79  if( rwork == NULL ) {
81  goto exit_level_1;
82  }
83  work = (lapack_complex_double*)
84  LAPACKE_malloc( sizeof(lapack_complex_double) * lwork );
85  if( work == NULL ) {
87  goto exit_level_2;
88  }
89  /* Call middle-level interface */
90  info = LAPACKE_zhpevd_work( matrix_layout, jobz, uplo, n, ap, w, z, ldz,
91  work, lwork, rwork, lrwork, iwork, liwork );
92  /* Release memory and exit */
93  LAPACKE_free( work );
94 exit_level_2:
95  LAPACKE_free( rwork );
96 exit_level_1:
97  LAPACKE_free( iwork );
98 exit_level_0:
99  if( info == LAPACK_WORK_MEMORY_ERROR ) {
100  LAPACKE_xerbla( "LAPACKE_zhpevd", info );
101  }
102  return info;
103 }
#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
lapack_logical LAPACKE_zhp_nancheck(lapack_int n, const lapack_complex_double *ap)
#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_int LAPACKE_zhpevd_work(int matrix_layout, char jobz, char uplo, lapack_int n, lapack_complex_double *ap, double *w, lapack_complex_double *z, lapack_int ldz, lapack_complex_double *work, lapack_int lwork, double *rwork, lapack_int lrwork, lapack_int *iwork, lapack_int liwork)
int LAPACKE_get_nancheck()
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