LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_ztgexc_work()

lapack_int LAPACKE_ztgexc_work ( int  matrix_layout,
lapack_logical  wantq,
lapack_logical  wantz,
lapack_int  n,
lapack_complex_double a,
lapack_int  lda,
lapack_complex_double b,
lapack_int  ldb,
lapack_complex_double q,
lapack_int  ldq,
lapack_complex_double z,
lapack_int  ldz,
lapack_int  ifst,
lapack_int  ilst 
)

Definition at line 35 of file lapacke_ztgexc_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_ztgexc( &wantq, &wantz, &n, a, &lda, b, &ldb, q, &ldq, z, &ldz,
47  &ifst, &ilst, &info );
48  if( info < 0 ) {
49  info = info - 1;
50  }
51  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
52  lapack_int lda_t = MAX(1,n);
53  lapack_int ldb_t = MAX(1,n);
54  lapack_int ldq_t = MAX(1,n);
55  lapack_int ldz_t = MAX(1,n);
56  lapack_complex_double* a_t = NULL;
57  lapack_complex_double* b_t = NULL;
58  lapack_complex_double* q_t = NULL;
59  lapack_complex_double* z_t = NULL;
60  /* Check leading dimension(s) */
61  if( lda < n ) {
62  info = -6;
63  LAPACKE_xerbla( "LAPACKE_ztgexc_work", info );
64  return info;
65  }
66  if( ldb < n ) {
67  info = -8;
68  LAPACKE_xerbla( "LAPACKE_ztgexc_work", info );
69  return info;
70  }
71  if( ldq < n ) {
72  info = -10;
73  LAPACKE_xerbla( "LAPACKE_ztgexc_work", info );
74  return info;
75  }
76  if( ldz < n ) {
77  info = -12;
78  LAPACKE_xerbla( "LAPACKE_ztgexc_work", info );
79  return info;
80  }
81  /* Allocate memory for temporary array(s) */
82  a_t = (lapack_complex_double*)
83  LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
84  if( a_t == NULL ) {
86  goto exit_level_0;
87  }
88  b_t = (lapack_complex_double*)
89  LAPACKE_malloc( sizeof(lapack_complex_double) * ldb_t * MAX(1,n) );
90  if( b_t == NULL ) {
92  goto exit_level_1;
93  }
94  if( wantq ) {
95  q_t = (lapack_complex_double*)
97  ldq_t * MAX(1,n) );
98  if( q_t == NULL ) {
100  goto exit_level_2;
101  }
102  }
103  if( wantz ) {
104  z_t = (lapack_complex_double*)
106  ldz_t * MAX(1,n) );
107  if( z_t == NULL ) {
109  goto exit_level_3;
110  }
111  }
112  /* Transpose input matrices */
113  LAPACKE_zge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
114  LAPACKE_zge_trans( matrix_layout, n, n, b, ldb, b_t, ldb_t );
115  if( wantq ) {
116  LAPACKE_zge_trans( matrix_layout, n, n, q, ldq, q_t, ldq_t );
117  }
118  if( wantz ) {
119  LAPACKE_zge_trans( matrix_layout, n, n, z, ldz, z_t, ldz_t );
120  }
121  /* Call LAPACK function and adjust info */
122  LAPACK_ztgexc( &wantq, &wantz, &n, a_t, &lda_t, b_t, &ldb_t, q_t,
123  &ldq_t, z_t, &ldz_t, &ifst, &ilst, &info );
124  if( info < 0 ) {
125  info = info - 1;
126  }
127  /* Transpose output matrices */
128  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
129  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
130  if( wantq ) {
131  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
132  }
133  if( wantz ) {
134  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
135  }
136  /* Release memory and exit */
137  if( wantz ) {
138  LAPACKE_free( z_t );
139  }
140 exit_level_3:
141  if( wantq ) {
142  LAPACKE_free( q_t );
143  }
144 exit_level_2:
145  LAPACKE_free( b_t );
146 exit_level_1:
147  LAPACKE_free( a_t );
148 exit_level_0:
149  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
150  LAPACKE_xerbla( "LAPACKE_ztgexc_work", info );
151  }
152  } else {
153  info = -1;
154  LAPACKE_xerbla( "LAPACKE_ztgexc_work", info );
155  }
156  return info;
157 }
void LAPACK_ztgexc(lapack_logical const *wantq, lapack_logical const *wantz, lapack_int const *n, lapack_complex_double *A, lapack_int const *lda, lapack_complex_double *B, lapack_int const *ldb, lapack_complex_double *Q, lapack_int const *ldq, lapack_complex_double *Z, lapack_int const *ldz, lapack_int const *ifst, lapack_int *ilst, lapack_int *info)
#define lapack_int
Definition: lapack.h:83
#define lapack_complex_double
Definition: lapack.h:63
#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)
void LAPACKE_zge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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