LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dggev()

lapack_int LAPACKE_dggev ( int  matrix_layout,
char  jobvl,
char  jobvr,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  b,
lapack_int  ldb,
double *  alphar,
double *  alphai,
double *  beta,
double *  vl,
lapack_int  ldvl,
double *  vr,
lapack_int  ldvr 
)

Definition at line 36 of file lapacke_dggev.c.

41 {
42  lapack_int info = 0;
43  lapack_int lwork = -1;
44  double* work = NULL;
45  double work_query;
46  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
47  LAPACKE_xerbla( "LAPACKE_dggev", -1 );
48  return -1;
49  }
50 #ifndef LAPACK_DISABLE_NAN_CHECK
51  /* Optionally check input matrices for NaNs */
52  if( LAPACKE_dge_nancheck( matrix_layout, n, n, a, lda ) ) {
53  return -5;
54  }
55  if( LAPACKE_dge_nancheck( matrix_layout, n, n, b, ldb ) ) {
56  return -7;
57  }
58 #endif
59  /* Query optimal working array(s) size */
60  info = LAPACKE_dggev_work( matrix_layout, jobvl, jobvr, n, a, lda, b, ldb,
61  alphar, alphai, beta, vl, ldvl, vr, ldvr,
62  &work_query, lwork );
63  if( info != 0 ) {
64  goto exit_level_0;
65  }
66  lwork = (lapack_int)work_query;
67  /* Allocate memory for work arrays */
68  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
69  if( work == NULL ) {
71  goto exit_level_0;
72  }
73  /* Call middle-level interface */
74  info = LAPACKE_dggev_work( matrix_layout, jobvl, jobvr, n, a, lda, b, ldb,
75  alphar, alphai, beta, vl, ldvl, vr, ldvr, work,
76  lwork );
77  /* Release memory and exit */
78  LAPACKE_free( work );
79 exit_level_0:
80  if( info == LAPACK_WORK_MEMORY_ERROR ) {
81  LAPACKE_xerbla( "LAPACKE_dggev", info );
82  }
83  return info;
84 }
lapack_int LAPACKE_dggev_work(int matrix_layout, char jobvl, char jobvr, lapack_int n, double *a, lapack_int lda, double *b, lapack_int ldb, double *alphar, double *alphai, double *beta, double *vl, lapack_int ldvl, double *vr, lapack_int ldvr, 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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