LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_cheev_2stage()

lapack_int LAPACKE_cheev_2stage ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
lapack_complex_float a,
lapack_int  lda,
float *  w 
)

Definition at line 36 of file lapacke_cheev_2stage.c.

38 {
39  lapack_int info = 0;
40  lapack_int lwork = -1;
41  float* rwork = NULL;
42  lapack_complex_float* work = NULL;
43  lapack_complex_float work_query;
44  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
45  LAPACKE_xerbla( "LAPACKE_cheev_2stage", -1 );
46  return -1;
47  }
48 #ifndef LAPACK_DISABLE_NAN_CHECK
49  if( LAPACKE_get_nancheck() ) {
50  /* Optionally check input matrices for NaNs */
51  if( LAPACKE_che_nancheck( matrix_layout, uplo, n, a, lda ) ) {
52  return -5;
53  }
54  }
55 #endif
56  /* Allocate memory for working array(s) */
57  rwork = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,3*n-2) );
58  if( rwork == NULL ) {
60  goto exit_level_0;
61  }
62  /* Query optimal working array(s) size */
63  info = LAPACKE_cheev_2stage_work( matrix_layout, jobz, uplo, n, a, lda, w,
64  &work_query, lwork, rwork );
65  if( info != 0 ) {
66  goto exit_level_1;
67  }
68  lwork = LAPACK_C2INT( work_query );
69  /* Allocate memory for work arrays */
70  work = (lapack_complex_float*)
71  LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
72  if( work == NULL ) {
74  goto exit_level_1;
75  }
76  /* Call middle-level interface */
77  info = LAPACKE_cheev_2stage_work( matrix_layout, jobz, uplo, n, a, lda, w, work,
78  lwork, rwork );
79  /* Release memory and exit */
80  LAPACKE_free( work );
81 exit_level_1:
82  LAPACKE_free( rwork );
83 exit_level_0:
84  if( info == LAPACK_WORK_MEMORY_ERROR ) {
85  LAPACKE_xerbla( "LAPACKE_cheev_2stage", info );
86  }
87  return info;
88 }
#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
#define MAX(x, y)
Definition: lapacke_utils.h:47
#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)
lapack_logical LAPACKE_che_nancheck(int matrix_layout, char uplo, lapack_int n, const lapack_complex_float *a, lapack_int lda)
#define lapack_int
Definition: lapacke.h:47
lapack_int LAPACKE_cheev_2stage_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)
int LAPACKE_get_nancheck()
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