LAPACK  3.9.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zhbevx_work()

lapack_int LAPACKE_zhbevx_work ( int  matrix_layout,
char  jobz,
char  range,
char  uplo,
lapack_int  n,
lapack_int  kd,
lapack_complex_double *  ab,
lapack_int  ldab,
lapack_complex_double *  q,
lapack_int  ldq,
double  vl,
double  vu,
lapack_int  il,
lapack_int  iu,
double  abstol,
lapack_int *  m,
double *  w,
lapack_complex_double *  z,
lapack_int  ldz,
lapack_complex_double *  work,
double *  rwork,
lapack_int *  iwork,
lapack_int *  ifail 
)

Definition at line 35 of file lapacke_zhbevx_work.c.

45 {
46  lapack_int info = 0;
47  if( matrix_layout == LAPACK_COL_MAJOR ) {
48  /* Call LAPACK function and adjust info */
49  LAPACK_zhbevx( &jobz, &range, &uplo, &n, &kd, ab, &ldab, q, &ldq, &vl,
50  &vu, &il, &iu, &abstol, m, w, z, &ldz, work, rwork,
51  iwork, ifail, &info );
52  if( info < 0 ) {
53  info = info - 1;
54  }
55  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
56  lapack_int ncols_z = ( LAPACKE_lsame( range, 'a' ) ||
57  LAPACKE_lsame( range, 'v' ) ) ? n :
58  ( LAPACKE_lsame( range, 'i' ) ? (iu-il+1) : 1);
59  lapack_int ldab_t = MAX(1,kd+1);
60  lapack_int ldq_t = MAX(1,n);
61  lapack_int ldz_t = MAX(1,n);
62  lapack_complex_double* ab_t = NULL;
63  lapack_complex_double* q_t = NULL;
64  lapack_complex_double* z_t = NULL;
65  /* Check leading dimension(s) */
66  if( ldab < n ) {
67  info = -8;
68  LAPACKE_xerbla( "LAPACKE_zhbevx_work", info );
69  return info;
70  }
71  if( ldq < n ) {
72  info = -10;
73  LAPACKE_xerbla( "LAPACKE_zhbevx_work", info );
74  return info;
75  }
76  if( ldz < ncols_z ) {
77  info = -19;
78  LAPACKE_xerbla( "LAPACKE_zhbevx_work", info );
79  return info;
80  }
81  /* Allocate memory for temporary array(s) */
82  ab_t = (lapack_complex_double*)
83  LAPACKE_malloc( sizeof(lapack_complex_double) * ldab_t * MAX(1,n) );
84  if( ab_t == NULL ) {
85  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
86  goto exit_level_0;
87  }
88  if( LAPACKE_lsame( jobz, 'v' ) ) {
89  q_t = (lapack_complex_double*)
90  LAPACKE_malloc( sizeof(lapack_complex_double) *
91  ldq_t * MAX(1,n) );
92  if( q_t == NULL ) {
93  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
94  goto exit_level_1;
95  }
96  }
97  if( LAPACKE_lsame( jobz, 'v' ) ) {
98  z_t = (lapack_complex_double*)
99  LAPACKE_malloc( sizeof(lapack_complex_double) *
100  ldz_t * MAX(1,ncols_z) );
101  if( z_t == NULL ) {
102  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
103  goto exit_level_2;
104  }
105  }
106  /* Transpose input matrices */
107  LAPACKE_zhb_trans( matrix_layout, uplo, n, kd, ab, ldab, ab_t, ldab_t );
108  /* Call LAPACK function and adjust info */
109  LAPACK_zhbevx( &jobz, &range, &uplo, &n, &kd, ab_t, &ldab_t, q_t,
110  &ldq_t, &vl, &vu, &il, &iu, &abstol, m, w, z_t, &ldz_t,
111  work, rwork, iwork, ifail, &info );
112  if( info < 0 ) {
113  info = info - 1;
114  }
115  /* Transpose output matrices */
116  LAPACKE_zhb_trans( LAPACK_COL_MAJOR, uplo, n, kd, ab_t, ldab_t, ab,
117  ldab );
118  if( LAPACKE_lsame( jobz, 'v' ) ) {
119  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
120  }
121  if( LAPACKE_lsame( jobz, 'v' ) ) {
122  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
123  ldz );
124  }
125  /* Release memory and exit */
126  if( LAPACKE_lsame( jobz, 'v' ) ) {
127  LAPACKE_free( z_t );
128  }
129 exit_level_2:
130  if( LAPACKE_lsame( jobz, 'v' ) ) {
131  LAPACKE_free( q_t );
132  }
133 exit_level_1:
134  LAPACKE_free( ab_t );
135 exit_level_0:
136  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
137  LAPACKE_xerbla( "LAPACKE_zhbevx_work", info );
138  }
139  } else {
140  info = -1;
141  LAPACKE_xerbla( "LAPACKE_zhbevx_work", info );
142  }
143  return info;
144 }
LAPACK_zhbevx
void LAPACK_zhbevx(char const *jobz, char const *range, char const *uplo, lapack_int const *n, lapack_int const *kd, lapack_complex_double *AB, lapack_int const *ldab, lapack_complex_double *Q, lapack_int const *ldq, double const *vl, double const *vu, lapack_int const *il, lapack_int const *iu, double const *abstol, lapack_int *m, double *W, lapack_complex_double *Z, lapack_int const *ldz, lapack_complex_double *work, double *rwork, lapack_int *iwork, lapack_int *IFAIL, lapack_int *info)
lapack_int
#define lapack_int
Definition: lapack.h:83
lapack_complex_double
#define lapack_complex_double
Definition: lapack.h:63
LAPACK_COL_MAJOR
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
LAPACKE_free
#define LAPACKE_free(p)
Definition: lapacke.h:46
LAPACK_ROW_MAJOR
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
LAPACKE_malloc
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
LAPACK_TRANSPOSE_MEMORY_ERROR
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
LAPACKE_lsame
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
LAPACKE_xerbla
void LAPACKE_xerbla(const char *name, lapack_int info)
Definition: lapacke_xerbla.c:36
LAPACKE_zge_trans
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)
Definition: lapacke_zge_trans.c:39
MAX
#define MAX(x, y)
Definition: lapacke_utils.h:46
LAPACKE_zhb_trans
void LAPACKE_zhb_trans(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
Definition: lapacke_zhb_trans.c:39
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