LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dtgsna_work()

lapack_int LAPACKE_dtgsna_work ( int  matrix_layout,
char  job,
char  howmny,
const lapack_logical select,
lapack_int  n,
const double *  a,
lapack_int  lda,
const double *  b,
lapack_int  ldb,
const double *  vl,
lapack_int  ldvl,
const double *  vr,
lapack_int  ldvr,
double *  s,
double *  dif,
lapack_int  mm,
lapack_int m,
double *  work,
lapack_int  lwork,
lapack_int iwork 
)

Definition at line 36 of file lapacke_dtgsna_work.c.

45 {
46  lapack_int info = 0;
47  if( matrix_layout == LAPACK_COL_MAJOR ) {
48  /* Call LAPACK function and adjust info */
49  LAPACK_dtgsna( &job, &howmny, select, &n, a, &lda, b, &ldb, vl, &ldvl,
50  vr, &ldvr, s, dif, &mm, m, work, &lwork, iwork, &info );
51  if( info < 0 ) {
52  info = info - 1;
53  }
54  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
55  lapack_int lda_t = MAX(1,n);
56  lapack_int ldb_t = MAX(1,n);
57  lapack_int ldvl_t = MAX(1,n);
58  lapack_int ldvr_t = MAX(1,n);
59  double* a_t = NULL;
60  double* b_t = NULL;
61  double* vl_t = NULL;
62  double* vr_t = NULL;
63  /* Check leading dimension(s) */
64  if( lda < n ) {
65  info = -7;
66  LAPACKE_xerbla( "LAPACKE_dtgsna_work", info );
67  return info;
68  }
69  if( ldb < n ) {
70  info = -9;
71  LAPACKE_xerbla( "LAPACKE_dtgsna_work", info );
72  return info;
73  }
74  if( ldvl < mm ) {
75  info = -11;
76  LAPACKE_xerbla( "LAPACKE_dtgsna_work", info );
77  return info;
78  }
79  if( ldvr < mm ) {
80  info = -13;
81  LAPACKE_xerbla( "LAPACKE_dtgsna_work", info );
82  return info;
83  }
84  /* Query optimal working array(s) size if requested */
85  if( lwork == -1 ) {
86  LAPACK_dtgsna( &job, &howmny, select, &n, a, &lda_t, b, &ldb_t, vl,
87  &ldvl_t, vr, &ldvr_t, s, dif, &mm, m, work, &lwork,
88  iwork, &info );
89  return (info < 0) ? (info - 1) : info;
90  }
91  /* Allocate memory for temporary array(s) */
92  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
93  if( a_t == NULL ) {
95  goto exit_level_0;
96  }
97  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,n) );
98  if( b_t == NULL ) {
100  goto exit_level_1;
101  }
102  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
103  vl_t = (double*)
104  LAPACKE_malloc( sizeof(double) * ldvl_t * MAX(1,mm) );
105  if( vl_t == NULL ) {
107  goto exit_level_2;
108  }
109  }
110  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
111  vr_t = (double*)
112  LAPACKE_malloc( sizeof(double) * ldvr_t * MAX(1,mm) );
113  if( vr_t == NULL ) {
115  goto exit_level_3;
116  }
117  }
118  /* Transpose input matrices */
119  LAPACKE_dge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
120  LAPACKE_dge_trans( matrix_layout, n, n, b, ldb, b_t, ldb_t );
121  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
122  LAPACKE_dge_trans( matrix_layout, n, mm, vl, ldvl, vl_t, ldvl_t );
123  }
124  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
125  LAPACKE_dge_trans( matrix_layout, n, mm, vr, ldvr, vr_t, ldvr_t );
126  }
127  /* Call LAPACK function and adjust info */
128  LAPACK_dtgsna( &job, &howmny, select, &n, a_t, &lda_t, b_t, &ldb_t,
129  vl_t, &ldvl_t, vr_t, &ldvr_t, s, dif, &mm, m, work,
130  &lwork, iwork, &info );
131  if( info < 0 ) {
132  info = info - 1;
133  }
134  /* Release memory and exit */
135  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
136  LAPACKE_free( vr_t );
137  }
138 exit_level_3:
139  if( LAPACKE_lsame( job, 'b' ) || LAPACKE_lsame( job, 'e' ) ) {
140  LAPACKE_free( vl_t );
141  }
142 exit_level_2:
143  LAPACKE_free( b_t );
144 exit_level_1:
145  LAPACKE_free( a_t );
146 exit_level_0:
147  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
148  LAPACKE_xerbla( "LAPACKE_dtgsna_work", info );
149  }
150  } else {
151  info = -1;
152  LAPACKE_xerbla( "LAPACKE_dtgsna_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
void LAPACK_dtgsna(char *job, char *howmny, const lapack_logical *select, lapack_int *n, const double *a, lapack_int *lda, const double *b, lapack_int *ldb, const double *vl, lapack_int *ldvl, const double *vr, lapack_int *ldvr, double *s, double *dif, lapack_int *mm, lapack_int *m, double *work, lapack_int *lwork, lapack_int *iwork, lapack_int *info)
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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