LAPACK  3.6.1
LAPACK: Linear Algebra PACKage
lapack_int LAPACKE_dsygvx ( int  matrix_layout,
lapack_int  itype,
char  jobz,
char  range,
char  uplo,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  b,
lapack_int  ldb,
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_dsygvx.c.

42 {
43  lapack_int info = 0;
44  lapack_int lwork = -1;
45  lapack_int* iwork = NULL;
46  double* work = NULL;
47  double work_query;
48  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
49  LAPACKE_xerbla( "LAPACKE_dsygvx", -1 );
50  return -1;
51  }
52 #ifndef LAPACK_DISABLE_NAN_CHECK
53  /* Optionally check input matrices for NaNs */
54  if( LAPACKE_dsy_nancheck( matrix_layout, uplo, n, a, lda ) ) {
55  return -7;
56  }
57  if( LAPACKE_d_nancheck( 1, &abstol, 1 ) ) {
58  return -15;
59  }
60  if( LAPACKE_dge_nancheck( matrix_layout, n, n, b, ldb ) ) {
61  return -9;
62  }
63  if( LAPACKE_lsame( range, 'v' ) ) {
64  if( LAPACKE_d_nancheck( 1, &vl, 1 ) ) {
65  return -11;
66  }
67  }
68  if( LAPACKE_lsame( range, 'v' ) ) {
69  if( LAPACKE_d_nancheck( 1, &vu, 1 ) ) {
70  return -12;
71  }
72  }
73 #endif
74  /* Allocate memory for working array(s) */
75  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,5*n) );
76  if( iwork == NULL ) {
77  info = LAPACK_WORK_MEMORY_ERROR;
78  goto exit_level_0;
79  }
80  /* Query optimal working array(s) size */
81  info = LAPACKE_dsygvx_work( matrix_layout, itype, jobz, range, uplo, n, a,
82  lda, b, ldb, vl, vu, il, iu, abstol, m, w, z,
83  ldz, &work_query, lwork, iwork, ifail );
84  if( info != 0 ) {
85  goto exit_level_1;
86  }
87  lwork = (lapack_int)work_query;
88  /* Allocate memory for work arrays */
89  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
90  if( work == NULL ) {
91  info = LAPACK_WORK_MEMORY_ERROR;
92  goto exit_level_1;
93  }
94  /* Call middle-level interface */
95  info = LAPACKE_dsygvx_work( matrix_layout, itype, jobz, range, uplo, n, a,
96  lda, b, ldb, vl, vu, il, iu, abstol, m, w, z,
97  ldz, work, lwork, iwork, ifail );
98  /* Release memory and exit */
99  LAPACKE_free( work );
100 exit_level_1:
101  LAPACKE_free( iwork );
102 exit_level_0:
103  if( info == LAPACK_WORK_MEMORY_ERROR ) {
104  LAPACKE_xerbla( "LAPACKE_dsygvx", info );
105  }
106  return info;
107 }
LAPACK_ROW_MAJOR
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
LAPACK_WORK_MEMORY_ERROR
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
MAX
#define MAX(x, y)
Definition: lapacke_utils.h:47
LAPACKE_dge_nancheck
lapack_logical LAPACKE_dge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const double *a, lapack_int lda)
Definition: lapacke_dge_nancheck.c:37
LAPACKE_free
#define LAPACKE_free(p)
Definition: lapacke.h:113
LAPACKE_malloc
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
LAPACKE_d_nancheck
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
Definition: lapacke_d_nancheck.c:37
LAPACKE_lsame
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
LAPACKE_dsygvx_work
lapack_int LAPACKE_dsygvx_work(int matrix_layout, lapack_int itype, char jobz, char range, char uplo, lapack_int n, double *a, lapack_int lda, double *b, lapack_int ldb, 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 lwork, lapack_int *iwork, lapack_int *ifail)
Definition: lapacke_dsygvx_work.c:36
LAPACK_COL_MAJOR
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
LAPACKE_xerbla
void LAPACKE_xerbla(const char *name, lapack_int info)
Definition: lapacke_xerbla.c:37
lapack_int
#define lapack_int
Definition: lapacke.h:47
LAPACKE_dsy_nancheck
lapack_logical LAPACKE_dsy_nancheck(int matrix_layout, char uplo, lapack_int n, const double *a, lapack_int lda)
Definition: lapacke_dsy_nancheck.c:37

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