LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_ssbevd_2stage()

lapack_int LAPACKE_ssbevd_2stage ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
lapack_int  kd,
float *  ab,
lapack_int  ldab,
float *  w,
float *  z,
lapack_int  ldz 
)

Definition at line 36 of file lapacke_ssbevd_2stage.c.

39 {
40  lapack_int info = 0;
41  lapack_int liwork = -1;
42  lapack_int lwork = -1;
43  lapack_int* iwork = NULL;
44  float* work = NULL;
45  lapack_int iwork_query;
46  float work_query;
47  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
48  LAPACKE_xerbla( "LAPACKE_ssbevd_2stage", -1 );
49  return -1;
50  }
51 #ifndef LAPACK_DISABLE_NAN_CHECK
52  /* Optionally check input matrices for NaNs */
53  if( LAPACKE_ssb_nancheck( matrix_layout, uplo, n, kd, ab, ldab ) ) {
54  return -6;
55  }
56 #endif
57  /* Query optimal working array(s) size */
58  info = LAPACKE_ssbevd_2stage_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
59  ldz, &work_query, lwork, &iwork_query, liwork );
60  if( info != 0 ) {
61  goto exit_level_0;
62  }
63  liwork = (lapack_int)iwork_query;
64  lwork = (lapack_int)work_query;
65  /* Allocate memory for work arrays */
66  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
67  if( iwork == NULL ) {
69  goto exit_level_0;
70  }
71  work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
72  if( work == NULL ) {
74  goto exit_level_1;
75  }
76  /* Call middle-level interface */
77  info = LAPACKE_ssbevd_2stage_work( matrix_layout, jobz, uplo, n, kd, ab, ldab, w, z,
78  ldz, work, lwork, iwork, liwork );
79  /* Release memory and exit */
80  LAPACKE_free( work );
81 exit_level_1:
82  LAPACKE_free( iwork );
83 exit_level_0:
84  if( info == LAPACK_WORK_MEMORY_ERROR ) {
85  LAPACKE_xerbla( "LAPACKE_ssbevd_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
lapack_logical LAPACKE_ssb_nancheck(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const float *ab, lapack_int ldab)
lapack_int LAPACKE_ssbevd_2stage_work(int matrix_layout, char jobz, char uplo, lapack_int n, lapack_int kd, float *ab, lapack_int ldab, float *w, float *z, lapack_int ldz, float *work, lapack_int lwork, lapack_int *iwork, lapack_int liwork)
#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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