LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zstedc_work()

lapack_int LAPACKE_zstedc_work ( int  matrix_layout,
char  compz,
lapack_int  n,
double *  d,
double *  e,
lapack_complex_double z,
lapack_int  ldz,
lapack_complex_double work,
lapack_int  lwork,
double *  rwork,
lapack_int  lrwork,
lapack_int iwork,
lapack_int  liwork 
)

Definition at line 36 of file lapacke_zstedc_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_zstedc( &compz, &n, d, e, z, &ldz, work, &lwork, rwork, &lrwork,
47  iwork, &liwork, &info );
48  if( info < 0 ) {
49  info = info - 1;
50  }
51  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
52  lapack_int ldz_t = MAX(1,n);
53  lapack_complex_double* z_t = NULL;
54  /* Check leading dimension(s) */
55  if( ldz < n ) {
56  info = -7;
57  LAPACKE_xerbla( "LAPACKE_zstedc_work", info );
58  return info;
59  }
60  /* Query optimal working array(s) size if requested */
61  if( liwork == -1 || lrwork == -1 || lwork == -1 ) {
62  LAPACK_zstedc( &compz, &n, d, e, z, &ldz_t, work, &lwork, rwork,
63  &lrwork, iwork, &liwork, &info );
64  return (info < 0) ? (info - 1) : info;
65  }
66  /* Allocate memory for temporary array(s) */
67  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
68  z_t = (lapack_complex_double*)
70  ldz_t * MAX(1,n) );
71  if( z_t == NULL ) {
73  goto exit_level_0;
74  }
75  }
76  /* Transpose input matrices */
77  if( LAPACKE_lsame( compz, 'v' ) ) {
78  LAPACKE_zge_trans( matrix_layout, n, n, z, ldz, z_t, ldz_t );
79  }
80  /* Call LAPACK function and adjust info */
81  LAPACK_zstedc( &compz, &n, d, e, z_t, &ldz_t, work, &lwork, rwork,
82  &lrwork, iwork, &liwork, &info );
83  if( info < 0 ) {
84  info = info - 1;
85  }
86  /* Transpose output matrices */
87  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
88  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
89  }
90  /* Release memory and exit */
91  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
92  LAPACKE_free( z_t );
93  }
94 exit_level_0:
95  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
96  LAPACKE_xerbla( "LAPACKE_zstedc_work", info );
97  }
98  } else {
99  info = -1;
100  LAPACKE_xerbla( "LAPACKE_zstedc_work", info );
101  }
102  return info;
103 }
#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
void LAPACK_zstedc(char *compz, lapack_int *n, double *d, double *e, lapack_complex_double *z, lapack_int *ldz, lapack_complex_double *work, lapack_int *lwork, double *rwork, lapack_int *lrwork, lapack_int *iwork, lapack_int *liwork, lapack_int *info)
#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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