LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_chegvd()

lapack_int LAPACKE_chegvd ( int  matrix_layout,
lapack_int  itype,
char  jobz,
char  uplo,
lapack_int  n,
lapack_complex_float a,
lapack_int  lda,
lapack_complex_float b,
lapack_int  ldb,
float *  w 
)

Definition at line 36 of file lapacke_chegvd.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  float* rwork = NULL;
47  lapack_complex_float* work = NULL;
48  lapack_int iwork_query;
49  float rwork_query;
50  lapack_complex_float work_query;
51  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
52  LAPACKE_xerbla( "LAPACKE_chegvd", -1 );
53  return -1;
54  }
55 #ifndef LAPACK_DISABLE_NAN_CHECK
56  if( LAPACKE_get_nancheck() ) {
57  /* Optionally check input matrices for NaNs */
58  if( LAPACKE_cge_nancheck( matrix_layout, n, n, a, lda ) ) {
59  return -6;
60  }
61  if( LAPACKE_cge_nancheck( matrix_layout, n, n, b, ldb ) ) {
62  return -8;
63  }
64  }
65 #endif
66  /* Query optimal working array(s) size */
67  info = LAPACKE_chegvd_work( matrix_layout, itype, jobz, uplo, n, a, lda, b,
68  ldb, w, &work_query, lwork, &rwork_query,
69  lrwork, &iwork_query, liwork );
70  if( info != 0 ) {
71  goto exit_level_0;
72  }
73  liwork = (lapack_int)iwork_query;
74  lrwork = (lapack_int)rwork_query;
75  lwork = LAPACK_C2INT( work_query );
76  /* Allocate memory for work arrays */
77  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
78  if( iwork == NULL ) {
80  goto exit_level_0;
81  }
82  rwork = (float*)LAPACKE_malloc( sizeof(float) * lrwork );
83  if( rwork == NULL ) {
85  goto exit_level_1;
86  }
87  work = (lapack_complex_float*)
88  LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
89  if( work == NULL ) {
91  goto exit_level_2;
92  }
93  /* Call middle-level interface */
94  info = LAPACKE_chegvd_work( matrix_layout, itype, jobz, uplo, n, a, lda, b,
95  ldb, w, work, lwork, rwork, lrwork, iwork,
96  liwork );
97  /* Release memory and exit */
98  LAPACKE_free( work );
99 exit_level_2:
100  LAPACKE_free( rwork );
101 exit_level_1:
102  LAPACKE_free( iwork );
103 exit_level_0:
104  if( info == LAPACK_WORK_MEMORY_ERROR ) {
105  LAPACKE_xerbla( "LAPACKE_chegvd", info );
106  }
107  return info;
108 }
#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_float
Definition: lapacke.h:74
lapack_logical LAPACKE_cge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *a, lapack_int lda)
lapack_int LAPACKE_chegvd_work(int matrix_layout, lapack_int itype, char jobz, char uplo, lapack_int n, lapack_complex_float *a, lapack_int lda, lapack_complex_float *b, lapack_int ldb, float *w, lapack_complex_float *work, lapack_int lwork, float *rwork, lapack_int lrwork, lapack_int *iwork, lapack_int liwork)
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#define LAPACK_C2INT(x)
Definition: lapacke.h:116
#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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