LAPACK  3.7.1
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 36 of file lapacke_ztrexc_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_ztrexc( &compq, &n, t, &ldt, q, &ldq, &ifst, &ilst, &info );
45  if( info < 0 ) {
46  info = info - 1;
47  }
48  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
49  lapack_int ldq_t = MAX(1,n);
50  lapack_int ldt_t = MAX(1,n);
51  lapack_complex_double* t_t = NULL;
52  lapack_complex_double* q_t = NULL;
53  /* Check leading dimension(s) */
54  if( ldq < n && LAPACKE_lsame( compq, 'v' ) ) {
55  info = -7;
56  LAPACKE_xerbla( "LAPACKE_ztrexc_work", info );
57  return info;
58  }
59  if( ldt < n ) {
60  info = -5;
61  LAPACKE_xerbla( "LAPACKE_ztrexc_work", info );
62  return info;
63  }
64  /* Allocate memory for temporary array(s) */
65  t_t = (lapack_complex_double*)
66  LAPACKE_malloc( sizeof(lapack_complex_double) * ldt_t * MAX(1,n) );
67  if( t_t == NULL ) {
69  goto exit_level_0;
70  }
71  if( LAPACKE_lsame( compq, 'v' ) ) {
72  q_t = (lapack_complex_double*)
74  ldq_t * MAX(1,n) );
75  if( q_t == NULL ) {
77  goto exit_level_1;
78  }
79  }
80  /* Transpose input matrices */
81  LAPACKE_zge_trans( matrix_layout, n, n, t, ldt, t_t, ldt_t );
82  if( LAPACKE_lsame( compq, 'v' ) ) {
83  LAPACKE_zge_trans( matrix_layout, n, n, q, ldq, q_t, ldq_t );
84  }
85  /* Call LAPACK function and adjust info */
86  LAPACK_ztrexc( &compq, &n, t_t, &ldt_t, q_t, &ldq_t, &ifst, &ilst,
87  &info );
88  if( info < 0 ) {
89  info = info - 1;
90  }
91  /* Transpose output matrices */
92  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, t_t, ldt_t, t, ldt );
93  if( LAPACKE_lsame( compq, 'v' ) ) {
94  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
95  }
96  /* Release memory and exit */
97  if( LAPACKE_lsame( compq, 'v' ) ) {
98  LAPACKE_free( q_t );
99  }
100 exit_level_1:
101  LAPACKE_free( t_t );
102 exit_level_0:
103  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
104  LAPACKE_xerbla( "LAPACKE_ztrexc_work", info );
105  }
106  } else {
107  info = -1;
108  LAPACKE_xerbla( "LAPACKE_ztrexc_work", info );
109  }
110  return info;
111 }
void LAPACK_ztrexc(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, lapack_int *info)
#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
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
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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