LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dtgevc_work()

lapack_int LAPACKE_dtgevc_work ( int  matrix_layout,
char  side,
char  howmny,
const lapack_logical select,
lapack_int  n,
const double *  s,
lapack_int  lds,
const double *  p,
lapack_int  ldp,
double *  vl,
lapack_int  ldvl,
double *  vr,
lapack_int  ldvr,
lapack_int  mm,
lapack_int m,
double *  work 
)

Definition at line 36 of file lapacke_dtgevc_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_dtgevc( &side, &howmny, select, &n, s, &lds, p, &ldp, vl, &ldvl,
47  vr, &ldvr, &mm, m, work, &info );
48  if( info < 0 ) {
49  info = info - 1;
50  }
51  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
52  lapack_int ldp_t = MAX(1,n);
53  lapack_int lds_t = MAX(1,n);
54  lapack_int ldvl_t = MAX(1,n);
55  lapack_int ldvr_t = MAX(1,n);
56  double* s_t = NULL;
57  double* p_t = NULL;
58  double* vl_t = NULL;
59  double* vr_t = NULL;
60  /* Check leading dimension(s) */
61  if( ldp < n ) {
62  info = -9;
63  LAPACKE_xerbla( "LAPACKE_dtgevc_work", info );
64  return info;
65  }
66  if( lds < n ) {
67  info = -7;
68  LAPACKE_xerbla( "LAPACKE_dtgevc_work", info );
69  return info;
70  }
71  if( ldvl < mm ) {
72  info = -11;
73  LAPACKE_xerbla( "LAPACKE_dtgevc_work", info );
74  return info;
75  }
76  if( ldvr < mm ) {
77  info = -13;
78  LAPACKE_xerbla( "LAPACKE_dtgevc_work", info );
79  return info;
80  }
81  /* Allocate memory for temporary array(s) */
82  s_t = (double*)LAPACKE_malloc( sizeof(double) * lds_t * MAX(1,n) );
83  if( s_t == NULL ) {
85  goto exit_level_0;
86  }
87  p_t = (double*)LAPACKE_malloc( sizeof(double) * ldp_t * MAX(1,n) );
88  if( p_t == NULL ) {
90  goto exit_level_1;
91  }
92  if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'l' ) ) {
93  vl_t = (double*)
94  LAPACKE_malloc( sizeof(double) * ldvl_t * MAX(1,mm) );
95  if( vl_t == NULL ) {
97  goto exit_level_2;
98  }
99  }
100  if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'r' ) ) {
101  vr_t = (double*)
102  LAPACKE_malloc( sizeof(double) * ldvr_t * MAX(1,mm) );
103  if( vr_t == NULL ) {
105  goto exit_level_3;
106  }
107  }
108  /* Transpose input matrices */
109  LAPACKE_dge_trans( matrix_layout, n, n, s, lds, s_t, lds_t );
110  LAPACKE_dge_trans( matrix_layout, n, n, p, ldp, p_t, ldp_t );
111  if( ( LAPACKE_lsame( side, 'l' ) || LAPACKE_lsame( side, 'b' ) ) &&
112  LAPACKE_lsame( howmny, 'b' ) ) {
113  LAPACKE_dge_trans( matrix_layout, n, mm, vl, ldvl, vl_t, ldvl_t );
114  }
115  if( ( LAPACKE_lsame( side, 'r' ) || LAPACKE_lsame( side, 'b' ) ) &&
116  LAPACKE_lsame( howmny, 'b' ) ) {
117  LAPACKE_dge_trans( matrix_layout, n, mm, vr, ldvr, vr_t, ldvr_t );
118  }
119  /* Call LAPACK function and adjust info */
120  LAPACK_dtgevc( &side, &howmny, select, &n, s_t, &lds_t, p_t, &ldp_t,
121  vl_t, &ldvl_t, vr_t, &ldvr_t, &mm, m, work, &info );
122  if( info < 0 ) {
123  info = info - 1;
124  }
125  /* Transpose output matrices */
126  if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'l' ) ) {
127  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, mm, vl_t, ldvl_t, vl,
128  ldvl );
129  }
130  if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'r' ) ) {
131  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, mm, vr_t, ldvr_t, vr,
132  ldvr );
133  }
134  /* Release memory and exit */
135  if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'r' ) ) {
136  LAPACKE_free( vr_t );
137  }
138 exit_level_3:
139  if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'l' ) ) {
140  LAPACKE_free( vl_t );
141  }
142 exit_level_2:
143  LAPACKE_free( p_t );
144 exit_level_1:
145  LAPACKE_free( s_t );
146 exit_level_0:
147  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
148  LAPACKE_xerbla( "LAPACKE_dtgevc_work", info );
149  }
150  } else {
151  info = -1;
152  LAPACKE_xerbla( "LAPACKE_dtgevc_work", info );
153  }
154  return info;
155 }
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
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
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
void LAPACK_dtgevc(char *side, char *howmny, const lapack_logical *select, lapack_int *n, const double *s, lapack_int *lds, const double *p, lapack_int *ldp, double *vl, lapack_int *ldvl, double *vr, lapack_int *ldvr, lapack_int *mm, lapack_int *m, double *work, lapack_int *info)
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