LAPACK  3.8.0
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 36 of file lapacke_ztgexc_work.c.

43 {
44  lapack_int info = 0;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_ztgexc( &wantq, &wantz, &n, a, &lda, b, &ldb, q, &ldq, z, &ldz,
48  &ifst, &ilst, &info );
49  if( info < 0 ) {
50  info = info - 1;
51  }
52  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
53  lapack_int lda_t = MAX(1,n);
54  lapack_int ldb_t = MAX(1,n);
55  lapack_int ldq_t = MAX(1,n);
56  lapack_int ldz_t = MAX(1,n);
57  lapack_complex_double* a_t = NULL;
58  lapack_complex_double* b_t = NULL;
59  lapack_complex_double* q_t = NULL;
60  lapack_complex_double* z_t = NULL;
61  /* Check leading dimension(s) */
62  if( lda < n ) {
63  info = -6;
64  LAPACKE_xerbla( "LAPACKE_ztgexc_work", info );
65  return info;
66  }
67  if( ldb < n ) {
68  info = -8;
69  LAPACKE_xerbla( "LAPACKE_ztgexc_work", info );
70  return info;
71  }
72  if( ldq < n ) {
73  info = -10;
74  LAPACKE_xerbla( "LAPACKE_ztgexc_work", info );
75  return info;
76  }
77  if( ldz < n ) {
78  info = -12;
79  LAPACKE_xerbla( "LAPACKE_ztgexc_work", info );
80  return info;
81  }
82  /* Allocate memory for temporary array(s) */
83  a_t = (lapack_complex_double*)
84  LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
85  if( a_t == NULL ) {
87  goto exit_level_0;
88  }
89  b_t = (lapack_complex_double*)
90  LAPACKE_malloc( sizeof(lapack_complex_double) * ldb_t * MAX(1,n) );
91  if( b_t == NULL ) {
93  goto exit_level_1;
94  }
95  if( wantq ) {
96  q_t = (lapack_complex_double*)
98  ldq_t * MAX(1,n) );
99  if( q_t == NULL ) {
101  goto exit_level_2;
102  }
103  }
104  if( wantz ) {
105  z_t = (lapack_complex_double*)
107  ldz_t * MAX(1,n) );
108  if( z_t == NULL ) {
110  goto exit_level_3;
111  }
112  }
113  /* Transpose input matrices */
114  LAPACKE_zge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
115  LAPACKE_zge_trans( matrix_layout, n, n, b, ldb, b_t, ldb_t );
116  if( wantq ) {
117  LAPACKE_zge_trans( matrix_layout, n, n, q, ldq, q_t, ldq_t );
118  }
119  if( wantz ) {
120  LAPACKE_zge_trans( matrix_layout, n, n, z, ldz, z_t, ldz_t );
121  }
122  /* Call LAPACK function and adjust info */
123  LAPACK_ztgexc( &wantq, &wantz, &n, a_t, &lda_t, b_t, &ldb_t, q_t,
124  &ldq_t, z_t, &ldz_t, &ifst, &ilst, &info );
125  if( info < 0 ) {
126  info = info - 1;
127  }
128  /* Transpose output matrices */
129  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
130  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
131  if( wantq ) {
132  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
133  }
134  if( wantz ) {
135  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
136  }
137  /* Release memory and exit */
138  if( wantz ) {
139  LAPACKE_free( z_t );
140  }
141 exit_level_3:
142  if( wantq ) {
143  LAPACKE_free( q_t );
144  }
145 exit_level_2:
146  LAPACKE_free( b_t );
147 exit_level_1:
148  LAPACKE_free( a_t );
149 exit_level_0:
150  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
151  LAPACKE_xerbla( "LAPACKE_ztgexc_work", info );
152  }
153  } else {
154  info = -1;
155  LAPACKE_xerbla( "LAPACKE_ztgexc_work", info );
156  }
157  return info;
158 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_double
Definition: lapacke.h:90
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
void LAPACK_ztgexc(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, lapack_int *info)
#define lapack_int
Definition: lapacke.h:47
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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)
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