LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dstevx()

lapack_int LAPACKE_dstevx ( int  matrix_layout,
char  jobz,
char  range,
lapack_int  n,
double *  d,
double *  e,
double  vl,
double  vu,
lapack_int  il,
lapack_int  iu,
double  abstol,
lapack_int m,
double *  w,
double *  z,
lapack_int  ldz,
lapack_int ifail 
)

Definition at line 36 of file lapacke_dstevx.c.

41 {
42  lapack_int info = 0;
43  lapack_int* iwork = NULL;
44  double* work = NULL;
45  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
46  LAPACKE_xerbla( "LAPACKE_dstevx", -1 );
47  return -1;
48  }
49 #ifndef LAPACK_DISABLE_NAN_CHECK
50  /* Optionally check input matrices for NaNs */
51  if( LAPACKE_d_nancheck( 1, &abstol, 1 ) ) {
52  return -11;
53  }
54  if( LAPACKE_d_nancheck( n, d, 1 ) ) {
55  return -5;
56  }
57  if( LAPACKE_d_nancheck( n-1, e, 1 ) ) {
58  return -6;
59  }
60  if( LAPACKE_lsame( range, 'v' ) ) {
61  if( LAPACKE_d_nancheck( 1, &vl, 1 ) ) {
62  return -7;
63  }
64  }
65  if( LAPACKE_lsame( range, 'v' ) ) {
66  if( LAPACKE_d_nancheck( 1, &vu, 1 ) ) {
67  return -8;
68  }
69  }
70 #endif
71  /* Allocate memory for working array(s) */
72  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,5*n) );
73  if( iwork == NULL ) {
75  goto exit_level_0;
76  }
77  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,5*n) );
78  if( work == NULL ) {
80  goto exit_level_1;
81  }
82  /* Call middle-level interface */
83  info = LAPACKE_dstevx_work( matrix_layout, jobz, range, n, d, e, vl, vu, il,
84  iu, abstol, m, w, z, ldz, work, iwork, ifail );
85  /* Release memory and exit */
86  LAPACKE_free( work );
87 exit_level_1:
88  LAPACKE_free( iwork );
89 exit_level_0:
90  if( info == LAPACK_WORK_MEMORY_ERROR ) {
91  LAPACKE_xerbla( "LAPACKE_dstevx", info );
92  }
93  return info;
94 }
#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_dstevx_work(int matrix_layout, char jobz, char range, lapack_int n, double *d, double *e, double vl, double vu, lapack_int il, lapack_int iu, double abstol, lapack_int *m, double *w, double *z, lapack_int ldz, double *work, lapack_int *iwork, lapack_int *ifail)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
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
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