LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_ztrexc_work()

lapack_int LAPACKE_ztrexc_work ( int  matrix_layout,
char  compq,
lapack_int  n,
lapack_complex_double t,
lapack_int  ldt,
lapack_complex_double q,
lapack_int  ldq,
lapack_int  ifst,
lapack_int  ilst 
)

Definition at line 35 of file lapacke_ztrexc_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_ztrexc( &compq, &n, t, &ldt, q, &ldq, &ifst, &ilst, &info );
44  if( info < 0 ) {
45  info = info - 1;
46  }
47  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
48  lapack_int ldq_t = MAX(1,n);
49  lapack_int ldt_t = MAX(1,n);
50  lapack_complex_double* t_t = NULL;
51  lapack_complex_double* q_t = NULL;
52  /* Check leading dimension(s) */
53  if( ldq < n && LAPACKE_lsame( compq, 'v' ) ) {
54  info = -7;
55  LAPACKE_xerbla( "LAPACKE_ztrexc_work", info );
56  return info;
57  }
58  if( ldt < n ) {
59  info = -5;
60  LAPACKE_xerbla( "LAPACKE_ztrexc_work", info );
61  return info;
62  }
63  /* Allocate memory for temporary array(s) */
64  t_t = (lapack_complex_double*)
65  LAPACKE_malloc( sizeof(lapack_complex_double) * ldt_t * MAX(1,n) );
66  if( t_t == NULL ) {
68  goto exit_level_0;
69  }
70  if( LAPACKE_lsame( compq, 'v' ) ) {
71  q_t = (lapack_complex_double*)
73  ldq_t * MAX(1,n) );
74  if( q_t == NULL ) {
76  goto exit_level_1;
77  }
78  }
79  /* Transpose input matrices */
80  LAPACKE_zge_trans( matrix_layout, n, n, t, ldt, t_t, ldt_t );
81  if( LAPACKE_lsame( compq, 'v' ) ) {
82  LAPACKE_zge_trans( matrix_layout, n, n, q, ldq, q_t, ldq_t );
83  }
84  /* Call LAPACK function and adjust info */
85  LAPACK_ztrexc( &compq, &n, t_t, &ldt_t, q_t, &ldq_t, &ifst, &ilst,
86  &info );
87  if( info < 0 ) {
88  info = info - 1;
89  }
90  /* Transpose output matrices */
91  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, t_t, ldt_t, t, ldt );
92  if( LAPACKE_lsame( compq, 'v' ) ) {
93  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
94  }
95  /* Release memory and exit */
96  if( LAPACKE_lsame( compq, 'v' ) ) {
97  LAPACKE_free( q_t );
98  }
99 exit_level_1:
100  LAPACKE_free( t_t );
101 exit_level_0:
102  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
103  LAPACKE_xerbla( "LAPACKE_ztrexc_work", info );
104  }
105  } else {
106  info = -1;
107  LAPACKE_xerbla( "LAPACKE_ztrexc_work", info );
108  }
109  return info;
110 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_ztrexc(...)
Definition: lapack.h:21636
#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
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
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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