LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dtrevc_work()

lapack_int LAPACKE_dtrevc_work ( int  matrix_layout,
char  side,
char  howmny,
lapack_logical select,
lapack_int  n,
const double *  t,
lapack_int  ldt,
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_dtrevc_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_dtrevc( &side, &howmny, select, &n, t, &ldt, vl, &ldvl, vr,
46  &ldvr, &mm, m, work, &info );
47  if( info < 0 ) {
48  info = info - 1;
49  }
50  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
51  lapack_int ldt_t = MAX(1,n);
52  lapack_int ldvl_t = MAX(1,n);
53  lapack_int ldvr_t = MAX(1,n);
54  double* t_t = NULL;
55  double* vl_t = NULL;
56  double* vr_t = NULL;
57  /* Check leading dimension(s) */
58  if( ldt < n ) {
59  info = -7;
60  LAPACKE_xerbla( "LAPACKE_dtrevc_work", info );
61  return info;
62  }
63  if( ldvl < mm ) {
64  info = -9;
65  LAPACKE_xerbla( "LAPACKE_dtrevc_work", info );
66  return info;
67  }
68  if( ldvr < mm ) {
69  info = -11;
70  LAPACKE_xerbla( "LAPACKE_dtrevc_work", info );
71  return info;
72  }
73  /* Allocate memory for temporary array(s) */
74  t_t = (double*)LAPACKE_malloc( sizeof(double) * ldt_t * MAX(1,n) );
75  if( t_t == NULL ) {
77  goto exit_level_0;
78  }
79  if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'l' ) ) {
80  vl_t = (double*)
81  LAPACKE_malloc( sizeof(double) * ldvl_t * MAX(1,mm) );
82  if( vl_t == NULL ) {
84  goto exit_level_1;
85  }
86  }
87  if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'r' ) ) {
88  vr_t = (double*)
89  LAPACKE_malloc( sizeof(double) * ldvr_t * MAX(1,mm) );
90  if( vr_t == NULL ) {
92  goto exit_level_2;
93  }
94  }
95  /* Transpose input matrices */
96  LAPACKE_dge_trans( matrix_layout, n, n, t, ldt, t_t, ldt_t );
97  if( ( LAPACKE_lsame( side, 'l' ) || LAPACKE_lsame( side, 'b' ) ) &&
98  LAPACKE_lsame( howmny, 'b' ) ) {
99  LAPACKE_dge_trans( matrix_layout, n, mm, vl, ldvl, vl_t, ldvl_t );
100  }
101  if( ( LAPACKE_lsame( side, 'r' ) || LAPACKE_lsame( side, 'b' ) ) &&
102  LAPACKE_lsame( howmny, 'b' ) ) {
103  LAPACKE_dge_trans( matrix_layout, n, mm, vr, ldvr, vr_t, ldvr_t );
104  }
105  /* Call LAPACK function and adjust info */
106  LAPACK_dtrevc( &side, &howmny, select, &n, t_t, &ldt_t, vl_t, &ldvl_t,
107  vr_t, &ldvr_t, &mm, m, work, &info );
108  if( info < 0 ) {
109  info = info - 1;
110  }
111  /* Transpose output matrices */
112  if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'l' ) ) {
113  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, mm, vl_t, ldvl_t, vl,
114  ldvl );
115  }
116  if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'r' ) ) {
117  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, mm, vr_t, ldvr_t, vr,
118  ldvr );
119  }
120  /* Release memory and exit */
121  if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'r' ) ) {
122  LAPACKE_free( vr_t );
123  }
124 exit_level_2:
125  if( LAPACKE_lsame( side, 'b' ) || LAPACKE_lsame( side, 'l' ) ) {
126  LAPACKE_free( vl_t );
127  }
128 exit_level_1:
129  LAPACKE_free( t_t );
130 exit_level_0:
131  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
132  LAPACKE_xerbla( "LAPACKE_dtrevc_work", info );
133  }
134  } else {
135  info = -1;
136  LAPACKE_xerbla( "LAPACKE_dtrevc_work", info );
137  }
138  return info;
139 }
void LAPACK_dtrevc(char *side, char *howmny, lapack_logical *select, lapack_int *n, const double *t, lapack_int *ldt, double *vl, lapack_int *ldvl, double *vr, lapack_int *ldvr, lapack_int *mm, lapack_int *m, double *work, lapack_int *info)
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
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