LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dpteqr()

lapack_int LAPACKE_dpteqr ( int  matrix_layout,
char  compz,
lapack_int  n,
double *  d,
double *  e,
double *  z,
lapack_int  ldz 
)

Definition at line 35 of file lapacke_dpteqr.c.

37 {
38  lapack_int info = 0;
39  /* Additional scalars declarations for work arrays */
40  lapack_int lwork;
41  double* work = NULL;
42  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
43  LAPACKE_xerbla( "LAPACKE_dpteqr", -1 );
44  return -1;
45  }
46 #ifndef LAPACK_DISABLE_NAN_CHECK
47  if( LAPACKE_get_nancheck() ) {
48  /* Optionally check input matrices for NaNs */
49  if( LAPACKE_d_nancheck( n, d, 1 ) ) {
50  return -4;
51  }
52  if( LAPACKE_d_nancheck( n-1, e, 1 ) ) {
53  return -5;
54  }
55  if( LAPACKE_lsame( compz, 'v' ) ) {
56  if( LAPACKE_dge_nancheck( matrix_layout, n, n, z, ldz ) ) {
57  return -6;
58  }
59  }
60  }
61 #endif
62  /* Additional scalars initializations for work arrays */
63  if( LAPACKE_lsame( compz, 'n' ) ) {
64  lwork = 1;
65  } else {
66  lwork = MAX(1,4*n-4);
67  }
68  /* Allocate memory for working array(s) */
69  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
70  if( work == NULL ) {
72  goto exit_level_0;
73  }
74  /* Call middle-level interface */
75  info = LAPACKE_dpteqr_work( matrix_layout, compz, n, d, e, z, ldz, work );
76  /* Release memory and exit */
77  LAPACKE_free( work );
78 exit_level_0:
79  if( info == LAPACK_WORK_MEMORY_ERROR ) {
80  LAPACKE_xerbla( "LAPACKE_dpteqr", info );
81  }
82  return info;
83 }
#define lapack_int
Definition: lapack.h:83
lapack_int LAPACKE_dpteqr_work(int matrix_layout, char compz, lapack_int n, double *d, double *e, double *z, lapack_int ldz, double *work)
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
#define MAX(x, y)
Definition: lapacke_utils.h:46
lapack_logical LAPACKE_dge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const double *a, lapack_int lda)
Here is the call graph for this function: