LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dstemr()

lapack_int LAPACKE_dstemr ( int  matrix_layout,
char  jobz,
char  range,
lapack_int  n,
double *  d,
double *  e,
double  vl,
double  vu,
lapack_int  il,
lapack_int  iu,
lapack_int m,
double *  w,
double *  z,
lapack_int  ldz,
lapack_int  nzc,
lapack_int isuppz,
lapack_logical tryrac 
)

Definition at line 36 of file lapacke_dstemr.c.

42 {
43  lapack_int info = 0;
44  lapack_int liwork = -1;
45  lapack_int lwork = -1;
46  lapack_int* iwork = NULL;
47  double* work = NULL;
48  lapack_int iwork_query;
49  double work_query;
50  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
51  LAPACKE_xerbla( "LAPACKE_dstemr", -1 );
52  return -1;
53  }
54 #ifndef LAPACK_DISABLE_NAN_CHECK
55  if( LAPACKE_get_nancheck() ) {
56  /* Optionally check input matrices for NaNs */
57  if( LAPACKE_d_nancheck( n, d, 1 ) ) {
58  return -5;
59  }
60  if( LAPACKE_d_nancheck( n-1, e, 1 ) ) {
61  return -6;
62  }
63  if( LAPACKE_d_nancheck( 1, &vl, 1 ) ) {
64  return -7;
65  }
66  if( LAPACKE_d_nancheck( 1, &vu, 1 ) ) {
67  return -8;
68  }
69  }
70 #endif
71  /* Query optimal working array(s) size */
72  info = LAPACKE_dstemr_work( matrix_layout, jobz, range, n, d, e, vl, vu, il,
73  iu, m, w, z, ldz, nzc, isuppz, tryrac,
74  &work_query, lwork, &iwork_query, liwork );
75  if( info != 0 ) {
76  goto exit_level_0;
77  }
78  liwork = (lapack_int)iwork_query;
79  lwork = (lapack_int)work_query;
80  /* Allocate memory for work arrays */
81  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
82  if( iwork == NULL ) {
84  goto exit_level_0;
85  }
86  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
87  if( work == NULL ) {
89  goto exit_level_1;
90  }
91  /* Call middle-level interface */
92  info = LAPACKE_dstemr_work( matrix_layout, jobz, range, n, d, e, vl, vu, il,
93  iu, m, w, z, ldz, nzc, isuppz, tryrac, work,
94  lwork, iwork, liwork );
95  /* Release memory and exit */
96  LAPACKE_free( work );
97 exit_level_1:
98  LAPACKE_free( iwork );
99 exit_level_0:
100  if( info == LAPACK_WORK_MEMORY_ERROR ) {
101  LAPACKE_xerbla( "LAPACKE_dstemr", info );
102  }
103  return info;
104 }
lapack_int LAPACKE_dstemr_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, lapack_int *m, double *w, double *z, lapack_int ldz, lapack_int nzc, lapack_int *isuppz, lapack_logical *tryrac, double *work, lapack_int lwork, lapack_int *iwork, lapack_int liwork)
#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
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
int LAPACKE_get_nancheck()
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