LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sstein()

lapack_int LAPACKE_sstein ( int  matrix_layout,
lapack_int  n,
const float *  d,
const float *  e,
lapack_int  m,
const float *  w,
const lapack_int iblock,
const lapack_int isplit,
float *  z,
lapack_int  ldz,
lapack_int ifailv 
)

Definition at line 36 of file lapacke_sstein.c.

40 {
41  lapack_int info = 0;
42  lapack_int* iwork = NULL;
43  float* work = NULL;
44  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
45  LAPACKE_xerbla( "LAPACKE_sstein", -1 );
46  return -1;
47  }
48 #ifndef LAPACK_DISABLE_NAN_CHECK
49  /* Optionally check input matrices for NaNs */
50  if( LAPACKE_s_nancheck( n, d, 1 ) ) {
51  return -3;
52  }
53  if( LAPACKE_s_nancheck( n-1, e, 1 ) ) {
54  return -4;
55  }
56  if( LAPACKE_s_nancheck( n, w, 1 ) ) {
57  return -6;
58  }
59 #endif
60  /* Allocate memory for working array(s) */
61  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n) );
62  if( iwork == NULL ) {
64  goto exit_level_0;
65  }
66  work = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,5*n) );
67  if( work == NULL ) {
69  goto exit_level_1;
70  }
71  /* Call middle-level interface */
72  info = LAPACKE_sstein_work( matrix_layout, n, d, e, m, w, iblock, isplit, z,
73  ldz, work, iwork, ifailv );
74  /* Release memory and exit */
75  LAPACKE_free( work );
76 exit_level_1:
77  LAPACKE_free( iwork );
78 exit_level_0:
79  if( info == LAPACK_WORK_MEMORY_ERROR ) {
80  LAPACKE_xerbla( "LAPACKE_sstein", info );
81  }
82  return info;
83 }
#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_s_nancheck(lapack_int n, const float *x, lapack_int incx)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_int LAPACKE_sstein_work(int matrix_layout, lapack_int n, const float *d, const float *e, lapack_int m, const float *w, const lapack_int *iblock, const lapack_int *isplit, float *z, lapack_int ldz, float *work, lapack_int *iwork, lapack_int *ifailv)
#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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