LAPACK  3.10.1
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 35 of file lapacke_dsbgvx.c.

42 {
43  lapack_int info = 0;
44  lapack_int* iwork = NULL;
45  double* work = NULL;
46  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
47  LAPACKE_xerbla( "LAPACKE_dsbgvx", -1 );
48  return -1;
49  }
50 #ifndef LAPACK_DISABLE_NAN_CHECK
51  if( LAPACKE_get_nancheck() ) {
52  /* Optionally check input matrices for NaNs */
53  if( LAPACKE_dsb_nancheck( matrix_layout, uplo, n, ka, ab, ldab ) ) {
54  return -8;
55  }
56  if( LAPACKE_d_nancheck( 1, &abstol, 1 ) ) {
57  return -18;
58  }
59  if( LAPACKE_dsb_nancheck( matrix_layout, uplo, n, kb, bb, ldbb ) ) {
60  return -10;
61  }
62  if( LAPACKE_lsame( range, 'v' ) ) {
63  if( LAPACKE_d_nancheck( 1, &vl, 1 ) ) {
64  return -14;
65  }
66  }
67  if( LAPACKE_lsame( range, 'v' ) ) {
68  if( LAPACKE_d_nancheck( 1, &vu, 1 ) ) {
69  return -15;
70  }
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 ) {
78  goto exit_level_0;
79  }
80  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,7*n) );
81  if( work == NULL ) {
83  goto exit_level_1;
84  }
85  /* Call middle-level interface */
86  info = LAPACKE_dsbgvx_work( matrix_layout, jobz, range, uplo, n, ka, kb, ab,
87  ldab, bb, ldbb, q, ldq, vl, vu, il, iu, abstol,
88  m, w, z, ldz, work, iwork, ifail );
89  /* Release memory and exit */
90  LAPACKE_free( work );
91 exit_level_1:
92  LAPACKE_free( iwork );
93 exit_level_0:
94  if( info == LAPACK_WORK_MEMORY_ERROR ) {
95  LAPACKE_xerbla( "LAPACKE_dsbgvx", info );
96  }
97  return info;
98 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
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 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_dsb_nancheck(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const double *ab, lapack_int ldab)
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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