LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zhseqr_work()

lapack_int LAPACKE_zhseqr_work ( int  matrix_layout,
char  job,
char  compz,
lapack_int  n,
lapack_int  ilo,
lapack_int  ihi,
lapack_complex_double h,
lapack_int  ldh,
lapack_complex_double w,
lapack_complex_double z,
lapack_int  ldz,
lapack_complex_double work,
lapack_int  lwork 
)

Definition at line 36 of file lapacke_zhseqr_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_zhseqr( &job, &compz, &n, &ilo, &ihi, h, &ldh, w, z, &ldz, work,
47  &lwork, &info );
48  if( info < 0 ) {
49  info = info - 1;
50  }
51  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
52  lapack_int ldh_t = MAX(1,n);
53  lapack_int ldz_t = MAX(1,n);
54  lapack_complex_double* h_t = NULL;
55  lapack_complex_double* z_t = NULL;
56  /* Check leading dimension(s) */
57  if( ldh < n ) {
58  info = -8;
59  LAPACKE_xerbla( "LAPACKE_zhseqr_work", info );
60  return info;
61  }
62  if( ldz < n ) {
63  info = -11;
64  LAPACKE_xerbla( "LAPACKE_zhseqr_work", info );
65  return info;
66  }
67  /* Query optimal working array(s) size if requested */
68  if( lwork == -1 ) {
69  LAPACK_zhseqr( &job, &compz, &n, &ilo, &ihi, h, &ldh_t, w, z,
70  &ldz_t, work, &lwork, &info );
71  return (info < 0) ? (info - 1) : info;
72  }
73  /* Allocate memory for temporary array(s) */
74  h_t = (lapack_complex_double*)
75  LAPACKE_malloc( sizeof(lapack_complex_double) * ldh_t * MAX(1,n) );
76  if( h_t == NULL ) {
78  goto exit_level_0;
79  }
80  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
81  z_t = (lapack_complex_double*)
83  ldz_t * MAX(1,n) );
84  if( z_t == NULL ) {
86  goto exit_level_1;
87  }
88  }
89  /* Transpose input matrices */
90  LAPACKE_zge_trans( matrix_layout, n, n, h, ldh, h_t, ldh_t );
91  if( LAPACKE_lsame( compz, 'v' ) ) {
92  LAPACKE_zge_trans( matrix_layout, n, n, z, ldz, z_t, ldz_t );
93  }
94  /* Call LAPACK function and adjust info */
95  LAPACK_zhseqr( &job, &compz, &n, &ilo, &ihi, h_t, &ldh_t, w, z_t,
96  &ldz_t, work, &lwork, &info );
97  if( info < 0 ) {
98  info = info - 1;
99  }
100  /* Transpose output matrices */
101  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, h_t, ldh_t, h, ldh );
102  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
103  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
104  }
105  /* Release memory and exit */
106  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
107  LAPACKE_free( z_t );
108  }
109 exit_level_1:
110  LAPACKE_free( h_t );
111 exit_level_0:
112  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
113  LAPACKE_xerbla( "LAPACKE_zhseqr_work", info );
114  }
115  } else {
116  info = -1;
117  LAPACKE_xerbla( "LAPACKE_zhseqr_work", info );
118  }
119  return info;
120 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
void LAPACK_zhseqr(char *job, char *compz, lapack_int *n, lapack_int *ilo, lapack_int *ihi, lapack_complex_double *h, lapack_int *ldh, lapack_complex_double *w, lapack_complex_double *z, lapack_int *ldz, lapack_complex_double *work, lapack_int *lwork, lapack_int *info)
#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)
Here is the call graph for this function:
Here is the caller graph for this function: