LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_chbev_2stage()

lapack_int LAPACKE_chbev_2stage ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
lapack_int  kd,
lapack_complex_float ab,
lapack_int  ldab,
float *  w,
lapack_complex_float z,
lapack_int  ldz 
)

Definition at line 36 of file lapacke_chbev_2stage.c.

40 {
41  lapack_int info = 0;
42  lapack_int lwork = -1;
43  float* rwork = NULL;
44  lapack_complex_float* work = NULL;
45  lapack_complex_float work_query;
46  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
47  LAPACKE_xerbla( "LAPACKE_chbev_2stage", -1 );
48  return -1;
49  }
50 #ifndef LAPACK_DISABLE_NAN_CHECK
51  /* Optionally check input matrices for NaNs */
52  if( LAPACKE_chb_nancheck( matrix_layout, uplo, n, kd, ab, ldab ) ) {
53  return -6;
54  }
55 #endif
56  /* Query optimal working array(s) size */
57  info = LAPACKE_chbev_2stage_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
58  ldz, &work_query, lwork, rwork );
59  if( info != 0 ) {
60  goto exit_level_0;
61  }
62  lwork = LAPACK_C2INT( work_query );
63  /* Allocate memory for working array(s) */
64  rwork = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,3*n-2) );
65  if( rwork == NULL ) {
67  goto exit_level_0;
68  }
69  work = (lapack_complex_float*)
70  LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
71  if( work == NULL ) {
73  goto exit_level_1;
74  }
75  /* Call middle-level interface */
76  info = LAPACKE_chbev_2stage_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
77  ldz, work, lwork, rwork );
78  /* Release memory and exit */
79  LAPACKE_free( work );
80 exit_level_1:
81  LAPACKE_free( rwork );
82 exit_level_0:
83  if( info == LAPACK_WORK_MEMORY_ERROR ) {
84  LAPACKE_xerbla( "LAPACKE_chbev_2stage", info );
85  }
86  return info;
87 }
#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_int LAPACKE_chbev_2stage_work(int matrix_layout, char jobz, char uplo, lapack_int n, lapack_int kd, lapack_complex_float *ab, lapack_int ldab, float *w, lapack_complex_float *z, lapack_int ldz, lapack_complex_float *work, lapack_int lwork, float *rwork)
lapack_logical LAPACKE_chb_nancheck(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const lapack_complex_float *ab, lapack_int ldab)
#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)
#define lapack_int
Definition: lapacke.h:47
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