LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_spteqr()

lapack_int LAPACKE_spteqr ( int  matrix_layout,
char  compz,
lapack_int  n,
float *  d,
float *  e,
float *  z,
lapack_int  ldz 
)

Definition at line 36 of file lapacke_spteqr.c.

38 {
39  lapack_int info = 0;
40  /* Additional scalars declarations for work arrays */
41  lapack_int lwork;
42  float* work = NULL;
43  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
44  LAPACKE_xerbla( "LAPACKE_spteqr", -1 );
45  return -1;
46  }
47 #ifndef LAPACK_DISABLE_NAN_CHECK
48  if( LAPACKE_get_nancheck() ) {
49  /* Optionally check input matrices for NaNs */
50  if( LAPACKE_s_nancheck( n, d, 1 ) ) {
51  return -4;
52  }
53  if( LAPACKE_s_nancheck( n-1, e, 1 ) ) {
54  return -5;
55  }
56  if( LAPACKE_lsame( compz, 'v' ) ) {
57  if( LAPACKE_sge_nancheck( matrix_layout, n, n, z, ldz ) ) {
58  return -6;
59  }
60  }
61  }
62 #endif
63  /* Additional scalars initializations for work arrays */
64  if( LAPACKE_lsame( compz, 'n' ) ) {
65  lwork = 1;
66  } else {
67  lwork = MAX(1,4*n-4);
68  }
69  /* Allocate memory for working array(s) */
70  work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
71  if( work == NULL ) {
73  goto exit_level_0;
74  }
75  /* Call middle-level interface */
76  info = LAPACKE_spteqr_work( matrix_layout, compz, n, d, e, z, ldz, work );
77  /* Release memory and exit */
78  LAPACKE_free( work );
79 exit_level_0:
80  if( info == LAPACK_WORK_MEMORY_ERROR ) {
81  LAPACKE_xerbla( "LAPACKE_spteqr", info );
82  }
83  return info;
84 }
#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_sge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const float *a, lapack_int lda)
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_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
lapack_int LAPACKE_spteqr_work(int matrix_layout, char compz, lapack_int n, float *d, float *e, float *z, lapack_int ldz, float *work)
int LAPACKE_get_nancheck()
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