LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsygv()

lapack_int LAPACKE_dsygv ( int  matrix_layout,
lapack_int  itype,
char  jobz,
char  uplo,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  b,
lapack_int  ldb,
double *  w 
)

Definition at line 36 of file lapacke_dsygv.c.

39 {
40  lapack_int info = 0;
41  lapack_int lwork = -1;
42  double* work = NULL;
43  double work_query;
44  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
45  LAPACKE_xerbla( "LAPACKE_dsygv", -1 );
46  return -1;
47  }
48 #ifndef LAPACK_DISABLE_NAN_CHECK
49  /* Optionally check input matrices for NaNs */
50  if( LAPACKE_dge_nancheck( matrix_layout, n, n, a, lda ) ) {
51  return -6;
52  }
53  if( LAPACKE_dge_nancheck( matrix_layout, n, n, b, ldb ) ) {
54  return -8;
55  }
56 #endif
57  /* Query optimal working array(s) size */
58  info = LAPACKE_dsygv_work( matrix_layout, itype, jobz, uplo, n, a, lda, b,
59  ldb, w, &work_query, lwork );
60  if( info != 0 ) {
61  goto exit_level_0;
62  }
63  lwork = (lapack_int)work_query;
64  /* Allocate memory for work arrays */
65  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
66  if( work == NULL ) {
68  goto exit_level_0;
69  }
70  /* Call middle-level interface */
71  info = LAPACKE_dsygv_work( matrix_layout, itype, jobz, uplo, n, a, lda, b,
72  ldb, w, work, lwork );
73  /* Release memory and exit */
74  LAPACKE_free( work );
75 exit_level_0:
76  if( info == LAPACK_WORK_MEMORY_ERROR ) {
77  LAPACKE_xerbla( "LAPACKE_dsygv", info );
78  }
79  return info;
80 }
lapack_int LAPACKE_dsygv_work(int matrix_layout, lapack_int itype, char jobz, char uplo, lapack_int n, double *a, lapack_int lda, double *b, lapack_int ldb, double *w, double *work, lapack_int lwork)
#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_logical LAPACKE_dge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const double *a, lapack_int lda)
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#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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