LAPACK  3.6.1
LAPACK: Linear Algebra PACKage
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 
)

Definition at line 36 of file lapacke_dggev_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_dggev( &jobvl, &jobvr, &n, a, &lda, b, &ldb, alphar, alphai,
47  beta, vl, &ldvl, vr, &ldvr, work, &lwork, &info );
48  if( info < 0 ) {
49  info = info - 1;
50  }
51  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
52  lapack_int nrows_vl = LAPACKE_lsame( jobvl, 'v' ) ? n : 1;
53  lapack_int ncols_vl = LAPACKE_lsame( jobvl, 'v' ) ? n : 1;
54  lapack_int nrows_vr = LAPACKE_lsame( jobvr, 'v' ) ? n : 1;
55  lapack_int ncols_vr = LAPACKE_lsame( jobvr, 'v' ) ? n : 1;
56  lapack_int lda_t = MAX(1,n);
57  lapack_int ldb_t = MAX(1,n);
58  lapack_int ldvl_t = MAX(1,nrows_vl);
59  lapack_int ldvr_t = MAX(1,nrows_vr);
60  double* a_t = NULL;
61  double* b_t = NULL;
62  double* vl_t = NULL;
63  double* vr_t = NULL;
64  /* Check leading dimension(s) */
65  if( lda < n ) {
66  info = -6;
67  LAPACKE_xerbla( "LAPACKE_dggev_work", info );
68  return info;
69  }
70  if( ldb < n ) {
71  info = -8;
72  LAPACKE_xerbla( "LAPACKE_dggev_work", info );
73  return info;
74  }
75  if( ldvl < ncols_vl ) {
76  info = -13;
77  LAPACKE_xerbla( "LAPACKE_dggev_work", info );
78  return info;
79  }
80  if( ldvr < ncols_vr ) {
81  info = -15;
82  LAPACKE_xerbla( "LAPACKE_dggev_work", info );
83  return info;
84  }
85  /* Query optimal working array(s) size if requested */
86  if( lwork == -1 ) {
87  LAPACK_dggev( &jobvl, &jobvr, &n, a, &lda_t, b, &ldb_t, alphar,
88  alphai, beta, vl, &ldvl_t, vr, &ldvr_t, work, &lwork,
89  &info );
90  return (info < 0) ? (info - 1) : info;
91  }
92  /* Allocate memory for temporary array(s) */
93  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
94  if( a_t == NULL ) {
95  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
96  goto exit_level_0;
97  }
98  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,n) );
99  if( b_t == NULL ) {
100  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
101  goto exit_level_1;
102  }
103  if( LAPACKE_lsame( jobvl, 'v' ) ) {
104  vl_t = (double*)
105  LAPACKE_malloc( sizeof(double) * ldvl_t * MAX(1,ncols_vl) );
106  if( vl_t == NULL ) {
107  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
108  goto exit_level_2;
109  }
110  }
111  if( LAPACKE_lsame( jobvr, 'v' ) ) {
112  vr_t = (double*)
113  LAPACKE_malloc( sizeof(double) * ldvr_t * MAX(1,ncols_vr) );
114  if( vr_t == NULL ) {
115  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
116  goto exit_level_3;
117  }
118  }
119  /* Transpose input matrices */
120  LAPACKE_dge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
121  LAPACKE_dge_trans( matrix_layout, n, n, b, ldb, b_t, ldb_t );
122  /* Call LAPACK function and adjust info */
123  LAPACK_dggev( &jobvl, &jobvr, &n, a_t, &lda_t, b_t, &ldb_t, alphar,
124  alphai, beta, vl_t, &ldvl_t, vr_t, &ldvr_t, work, &lwork,
125  &info );
126  if( info < 0 ) {
127  info = info - 1;
128  }
129  /* Transpose output matrices */
130  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
131  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
132  if( LAPACKE_lsame( jobvl, 'v' ) ) {
133  LAPACKE_dge_trans( LAPACK_COL_MAJOR, nrows_vl, ncols_vl, vl_t,
134  ldvl_t, vl, ldvl );
135  }
136  if( LAPACKE_lsame( jobvr, 'v' ) ) {
137  LAPACKE_dge_trans( LAPACK_COL_MAJOR, nrows_vr, ncols_vr, vr_t,
138  ldvr_t, vr, ldvr );
139  }
140  /* Release memory and exit */
141  if( LAPACKE_lsame( jobvr, 'v' ) ) {
142  LAPACKE_free( vr_t );
143  }
144 exit_level_3:
145  if( LAPACKE_lsame( jobvl, 'v' ) ) {
146  LAPACKE_free( vl_t );
147  }
148 exit_level_2:
149  LAPACKE_free( b_t );
150 exit_level_1:
151  LAPACKE_free( a_t );
152 exit_level_0:
153  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
154  LAPACKE_xerbla( "LAPACKE_dggev_work", info );
155  }
156  } else {
157  info = -1;
158  LAPACKE_xerbla( "LAPACKE_dggev_work", info );
159  }
160  return info;
161 }
LAPACKE_dge_trans
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
Definition: lapacke_dge_trans.c:40
LAPACK_ROW_MAJOR
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
MAX
#define MAX(x, y)
Definition: lapacke_utils.h:47
LAPACKE_free
#define LAPACKE_free(p)
Definition: lapacke.h:113
LAPACKE_malloc
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
LAPACK_dggev
void LAPACK_dggev(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, lapack_int *info)
LAPACKE_lsame
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.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
LAPACK_TRANSPOSE_MEMORY_ERROR
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123

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