LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_ssyevd_2stage()

lapack_int LAPACKE_ssyevd_2stage ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
float *  a,
lapack_int  lda,
float *  w 
)

Definition at line 36 of file lapacke_ssyevd_2stage.c.

38 {
39  lapack_int info = 0;
40  lapack_int liwork = -1;
41  lapack_int lwork = -1;
42  lapack_int* iwork = NULL;
43  float* work = NULL;
44  lapack_int iwork_query;
45  float work_query;
46  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
47  LAPACKE_xerbla( "LAPACKE_ssyevd_2stage", -1 );
48  return -1;
49  }
50 #ifndef LAPACK_DISABLE_NAN_CHECK
51  /* Optionally check input matrices for NaNs */
52  if( LAPACKE_sge_nancheck( matrix_layout, n, n, a, lda ) ) {
53  return -5;
54  }
55 #endif
56  /* Query optimal working array(s) size */
57  info = LAPACKE_ssyevd_2stage_work( matrix_layout, jobz, uplo, n, a, lda, w,
58  &work_query, lwork, &iwork_query, liwork );
59  if( info != 0 ) {
60  goto exit_level_0;
61  }
62  liwork = (lapack_int)iwork_query;
63  lwork = (lapack_int)work_query;
64  /* Allocate memory for work arrays */
65  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
66  if( iwork == NULL ) {
68  goto exit_level_0;
69  }
70  work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
71  if( work == NULL ) {
73  goto exit_level_1;
74  }
75  /* Call middle-level interface */
76  info = LAPACKE_ssyevd_2stage_work( matrix_layout, jobz, uplo, n, a, lda, w, work,
77  lwork, iwork, liwork );
78  /* Release memory and exit */
79  LAPACKE_free( work );
80 exit_level_1:
81  LAPACKE_free( iwork );
82 exit_level_0:
83  if( info == LAPACK_WORK_MEMORY_ERROR ) {
84  LAPACKE_xerbla( "LAPACKE_ssyevd_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
lapack_int LAPACKE_ssyevd_2stage_work(int matrix_layout, char jobz, char uplo, lapack_int n, float *a, lapack_int lda, float *w, float *work, lapack_int lwork, lapack_int *iwork, lapack_int liwork)
lapack_logical LAPACKE_sge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const float *a, lapack_int lda)
#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
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