LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dtgsen_work()

lapack_int LAPACKE_dtgsen_work ( int  matrix_layout,
lapack_int  ijob,
lapack_logical  wantq,
lapack_logical  wantz,
const lapack_logical select,
lapack_int  n,
double *  a,
lapack_int  lda,
double *  b,
lapack_int  ldb,
double *  alphar,
double *  alphai,
double *  beta,
double *  q,
lapack_int  ldq,
double *  z,
lapack_int  ldz,
lapack_int m,
double *  pl,
double *  pr,
double *  dif,
double *  work,
lapack_int  lwork,
lapack_int iwork,
lapack_int  liwork 
)

Definition at line 35 of file lapacke_dtgsen_work.c.

45 {
46  lapack_int info = 0;
47  if( matrix_layout == LAPACK_COL_MAJOR ) {
48  /* Call LAPACK function and adjust info */
49  LAPACK_dtgsen( &ijob, &wantq, &wantz, select, &n, a, &lda, b, &ldb,
50  alphar, alphai, beta, q, &ldq, z, &ldz, m, pl, pr, dif,
51  work, &lwork, iwork, &liwork, &info );
52  if( info < 0 ) {
53  info = info - 1;
54  }
55  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
56  lapack_int lda_t = MAX(1,n);
57  lapack_int ldb_t = MAX(1,n);
58  lapack_int ldq_t = MAX(1,n);
59  lapack_int ldz_t = MAX(1,n);
60  double* a_t = NULL;
61  double* b_t = NULL;
62  double* q_t = NULL;
63  double* z_t = NULL;
64  /* Check leading dimension(s) */
65  if( lda < n ) {
66  info = -8;
67  LAPACKE_xerbla( "LAPACKE_dtgsen_work", info );
68  return info;
69  }
70  if( ldb < n ) {
71  info = -10;
72  LAPACKE_xerbla( "LAPACKE_dtgsen_work", info );
73  return info;
74  }
75  if( ldq < n ) {
76  info = -15;
77  LAPACKE_xerbla( "LAPACKE_dtgsen_work", info );
78  return info;
79  }
80  if( ldz < n ) {
81  info = -17;
82  LAPACKE_xerbla( "LAPACKE_dtgsen_work", info );
83  return info;
84  }
85  /* Query optimal working array(s) size if requested */
86  if( liwork == -1 || lwork == -1 ) {
87  LAPACK_dtgsen( &ijob, &wantq, &wantz, select, &n, a, &lda_t, b,
88  &ldb_t, alphar, alphai, beta, q, &ldq_t, z, &ldz_t,
89  m, pl, pr, dif, work, &lwork, iwork, &liwork,
90  &info );
91  return (info < 0) ? (info - 1) : info;
92  }
93  /* Allocate memory for temporary array(s) */
94  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
95  if( a_t == NULL ) {
97  goto exit_level_0;
98  }
99  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,n) );
100  if( b_t == NULL ) {
102  goto exit_level_1;
103  }
104  if( wantq ) {
105  q_t = (double*)LAPACKE_malloc( sizeof(double) * ldq_t * MAX(1,n) );
106  if( q_t == NULL ) {
108  goto exit_level_2;
109  }
110  }
111  if( wantz ) {
112  z_t = (double*)LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,n) );
113  if( z_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( wantq ) {
122  LAPACKE_dge_trans( matrix_layout, n, n, q, ldq, q_t, ldq_t );
123  }
124  if( wantz ) {
125  LAPACKE_dge_trans( matrix_layout, n, n, z, ldz, z_t, ldz_t );
126  }
127  /* Call LAPACK function and adjust info */
128  LAPACK_dtgsen( &ijob, &wantq, &wantz, select, &n, a_t, &lda_t, b_t,
129  &ldb_t, alphar, alphai, beta, q_t, &ldq_t, z_t, &ldz_t,
130  m, pl, pr, dif, work, &lwork, iwork, &liwork, &info );
131  if( info < 0 ) {
132  info = info - 1;
133  }
134  /* Transpose output matrices */
135  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
136  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
137  if( wantq ) {
138  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
139  }
140  if( wantz ) {
141  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
142  }
143  /* Release memory and exit */
144  if( wantz ) {
145  LAPACKE_free( z_t );
146  }
147 exit_level_3:
148  if( wantq ) {
149  LAPACKE_free( q_t );
150  }
151 exit_level_2:
152  LAPACKE_free( b_t );
153 exit_level_1:
154  LAPACKE_free( a_t );
155 exit_level_0:
156  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
157  LAPACKE_xerbla( "LAPACKE_dtgsen_work", info );
158  }
159  } else {
160  info = -1;
161  LAPACKE_xerbla( "LAPACKE_dtgsen_work", info );
162  }
163  return info;
164 }
#define lapack_int
Definition: lapack.h:83
void LAPACK_dtgsen(lapack_int const *ijob, lapack_logical const *wantq, lapack_logical const *wantz, lapack_logical const *select, lapack_int const *n, double *A, lapack_int const *lda, double *B, lapack_int const *ldb, double *alphar, double *alphai, double *beta, double *Q, lapack_int const *ldq, double *Z, lapack_int const *ldz, lapack_int *m, double *pl, double *pr, double *DIF, double *work, lapack_int const *lwork, lapack_int *iwork, lapack_int const *liwork, lapack_int *info)
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
void LAPACKE_xerbla(const char *name, lapack_int info)
#define MAX(x, y)
Definition: lapacke_utils.h:46
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
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