LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_cheevd()

lapack_int LAPACKE_cheevd ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
lapack_complex_float a,
lapack_int  lda,
float *  w 
)

Definition at line 35 of file lapacke_cheevd.c.

37 {
38  lapack_int info = 0;
39  lapack_int liwork = -1;
40  lapack_int lrwork = -1;
41  lapack_int lwork = -1;
42  lapack_int* iwork = NULL;
43  float* rwork = NULL;
44  lapack_complex_float* work = NULL;
45  lapack_int iwork_query;
46  float rwork_query;
47  lapack_complex_float work_query;
48  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
49  LAPACKE_xerbla( "LAPACKE_cheevd", -1 );
50  return -1;
51  }
52 #ifndef LAPACK_DISABLE_NAN_CHECK
53  if( LAPACKE_get_nancheck() ) {
54  /* Optionally check input matrices for NaNs */
55  if( LAPACKE_che_nancheck( matrix_layout, uplo, n, a, lda ) ) {
56  return -5;
57  }
58  }
59 #endif
60  /* Query optimal working array(s) size */
61  info = LAPACKE_cheevd_work( matrix_layout, jobz, uplo, n, a, lda, w,
62  &work_query, lwork, &rwork_query, lrwork,
63  &iwork_query, liwork );
64  if( info != 0 ) {
65  goto exit_level_0;
66  }
67  liwork = iwork_query;
68  lrwork = (lapack_int)rwork_query;
69  lwork = LAPACK_C2INT( work_query );
70  /* Allocate memory for work arrays */
71  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
72  if( iwork == NULL ) {
74  goto exit_level_0;
75  }
76  rwork = (float*)LAPACKE_malloc( sizeof(float) * lrwork );
77  if( rwork == NULL ) {
79  goto exit_level_1;
80  }
81  work = (lapack_complex_float*)
82  LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
83  if( work == NULL ) {
85  goto exit_level_2;
86  }
87  /* Call middle-level interface */
88  info = LAPACKE_cheevd_work( matrix_layout, jobz, uplo, n, a, lda, w, work,
89  lwork, rwork, lrwork, iwork, liwork );
90  /* Release memory and exit */
91  LAPACKE_free( work );
92 exit_level_2:
93  LAPACKE_free( rwork );
94 exit_level_1:
95  LAPACKE_free( iwork );
96 exit_level_0:
97  if( info == LAPACK_WORK_MEMORY_ERROR ) {
98  LAPACKE_xerbla( "LAPACKE_cheevd", info );
99  }
100  return info;
101 }
#define lapack_int
Definition: lapack.h:83
#define lapack_complex_float
Definition: lapack.h:45
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACK_C2INT(x)
Definition: lapacke.h:49
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
lapack_int LAPACKE_cheevd_work(int matrix_layout, char jobz, char uplo, lapack_int n, lapack_complex_float *a, lapack_int lda, float *w, lapack_complex_float *work, lapack_int lwork, float *rwork, lapack_int lrwork, lapack_int *iwork, lapack_int liwork)
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_che_nancheck(int matrix_layout, char uplo, lapack_int n, const lapack_complex_float *a, lapack_int lda)
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