LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsbgvx()

lapack_int LAPACKE_dsbgvx ( int  matrix_layout,
char  jobz,
char  range,
char  uplo,
lapack_int  n,
lapack_int  ka,
lapack_int  kb,
double *  ab,
lapack_int  ldab,
double *  bb,
lapack_int  ldbb,
double *  q,
lapack_int  ldq,
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_dsbgvx.c.

43 {
44  lapack_int info = 0;
45  lapack_int* iwork = NULL;
46  double* work = NULL;
47  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
48  LAPACKE_xerbla( "LAPACKE_dsbgvx", -1 );
49  return -1;
50  }
51 #ifndef LAPACK_DISABLE_NAN_CHECK
52  if( LAPACKE_get_nancheck() ) {
53  /* Optionally check input matrices for NaNs */
54  if( LAPACKE_dsb_nancheck( matrix_layout, uplo, n, ka, ab, ldab ) ) {
55  return -8;
56  }
57  if( LAPACKE_d_nancheck( 1, &abstol, 1 ) ) {
58  return -18;
59  }
60  if( LAPACKE_dsb_nancheck( matrix_layout, uplo, n, kb, bb, ldbb ) ) {
61  return -10;
62  }
63  if( LAPACKE_lsame( range, 'v' ) ) {
64  if( LAPACKE_d_nancheck( 1, &vl, 1 ) ) {
65  return -14;
66  }
67  }
68  if( LAPACKE_lsame( range, 'v' ) ) {
69  if( LAPACKE_d_nancheck( 1, &vu, 1 ) ) {
70  return -15;
71  }
72  }
73  }
74 #endif
75  /* Allocate memory for working array(s) */
76  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,5*n) );
77  if( iwork == NULL ) {
79  goto exit_level_0;
80  }
81  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,7*n) );
82  if( work == NULL ) {
84  goto exit_level_1;
85  }
86  /* Call middle-level interface */
87  info = LAPACKE_dsbgvx_work( matrix_layout, jobz, range, uplo, n, ka, kb, ab,
88  ldab, bb, ldbb, q, ldq, vl, vu, il, iu, abstol,
89  m, w, z, ldz, work, iwork, ifail );
90  /* Release memory and exit */
91  LAPACKE_free( work );
92 exit_level_1:
93  LAPACKE_free( iwork );
94 exit_level_0:
95  if( info == LAPACK_WORK_MEMORY_ERROR ) {
96  LAPACKE_xerbla( "LAPACKE_dsbgvx", info );
97  }
98  return info;
99 }
#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_dsbgvx_work(int matrix_layout, char jobz, char range, char uplo, lapack_int n, lapack_int ka, lapack_int kb, double *ab, lapack_int ldab, double *bb, lapack_int ldbb, double *q, lapack_int ldq, 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
lapack_logical LAPACKE_dsb_nancheck(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const double *ab, lapack_int ldab)
int LAPACKE_get_nancheck()
Here is the call graph for this function: