LAPACK  3.6.1
LAPACK: Linear Algebra PACKage
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 36 of file lapacke_zhbevx_work.c.

46 {
47  lapack_int info = 0;
48  if( matrix_layout == LAPACK_COL_MAJOR ) {
49  /* Call LAPACK function and adjust info */
50  LAPACK_zhbevx( &jobz, &range, &uplo, &n, &kd, ab, &ldab, q, &ldq, &vl,
51  &vu, &il, &iu, &abstol, m, w, z, &ldz, work, rwork,
52  iwork, ifail, &info );
53  if( info < 0 ) {
54  info = info - 1;
55  }
56  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
57  lapack_int ncols_z = ( LAPACKE_lsame( range, 'a' ) ||
58  LAPACKE_lsame( range, 'v' ) ) ? n :
59  ( LAPACKE_lsame( range, 'i' ) ? (iu-il+1) : 1);
60  lapack_int ldab_t = MAX(1,kd+1);
61  lapack_int ldq_t = MAX(1,n);
62  lapack_int ldz_t = MAX(1,n);
63  lapack_complex_double* ab_t = NULL;
64  lapack_complex_double* q_t = NULL;
65  lapack_complex_double* z_t = NULL;
66  /* Check leading dimension(s) */
67  if( ldab < n ) {
68  info = -8;
69  LAPACKE_xerbla( "LAPACKE_zhbevx_work", info );
70  return info;
71  }
72  if( ldq < n ) {
73  info = -10;
74  LAPACKE_xerbla( "LAPACKE_zhbevx_work", info );
75  return info;
76  }
77  if( ldz < ncols_z ) {
78  info = -19;
79  LAPACKE_xerbla( "LAPACKE_zhbevx_work", info );
80  return info;
81  }
82  /* Allocate memory for temporary array(s) */
83  ab_t = (lapack_complex_double*)
84  LAPACKE_malloc( sizeof(lapack_complex_double) * ldab_t * MAX(1,n) );
85  if( ab_t == NULL ) {
86  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
87  goto exit_level_0;
88  }
89  if( LAPACKE_lsame( jobz, 'v' ) ) {
90  q_t = (lapack_complex_double*)
91  LAPACKE_malloc( sizeof(lapack_complex_double) *
92  ldq_t * MAX(1,n) );
93  if( q_t == NULL ) {
94  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
95  goto exit_level_1;
96  }
97  }
98  if( LAPACKE_lsame( jobz, 'v' ) ) {
99  z_t = (lapack_complex_double*)
100  LAPACKE_malloc( sizeof(lapack_complex_double) *
101  ldz_t * MAX(1,ncols_z) );
102  if( z_t == NULL ) {
103  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
104  goto exit_level_2;
105  }
106  }
107  /* Transpose input matrices */
108  LAPACKE_zhb_trans( matrix_layout, uplo, n, kd, ab, ldab, ab_t, ldab_t );
109  /* Call LAPACK function and adjust info */
110  LAPACK_zhbevx( &jobz, &range, &uplo, &n, &kd, ab_t, &ldab_t, q_t,
111  &ldq_t, &vl, &vu, &il, &iu, &abstol, m, w, z_t, &ldz_t,
112  work, rwork, iwork, ifail, &info );
113  if( info < 0 ) {
114  info = info - 1;
115  }
116  /* Transpose output matrices */
117  LAPACKE_zhb_trans( LAPACK_COL_MAJOR, uplo, n, kd, ab_t, ldab_t, ab,
118  ldab );
119  if( LAPACKE_lsame( jobz, 'v' ) ) {
120  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
121  }
122  if( LAPACKE_lsame( jobz, 'v' ) ) {
123  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
124  ldz );
125  }
126  /* Release memory and exit */
127  if( LAPACKE_lsame( jobz, 'v' ) ) {
128  LAPACKE_free( z_t );
129  }
130 exit_level_2:
131  if( LAPACKE_lsame( jobz, 'v' ) ) {
132  LAPACKE_free( q_t );
133  }
134 exit_level_1:
135  LAPACKE_free( ab_t );
136 exit_level_0:
137  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
138  LAPACKE_xerbla( "LAPACKE_zhbevx_work", info );
139  }
140  } else {
141  info = -1;
142  LAPACKE_xerbla( "LAPACKE_zhbevx_work", info );
143  }
144  return info;
145 }
LAPACK_zhbevx
void LAPACK_zhbevx(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, lapack_int *info)
LAPACK_ROW_MAJOR
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
lapack_complex_double
#define lapack_complex_double
Definition: lapacke.h:90
MAX
#define MAX(x, y)
Definition: lapacke_utils.h:47
LAPACKE_free
#define LAPACKE_free(p)
Definition: lapacke.h:113
LAPACKE_malloc
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
LAPACKE_lsame
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
LAPACK_COL_MAJOR
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
LAPACKE_xerbla
void LAPACKE_xerbla(const char *name, lapack_int info)
Definition: lapacke_xerbla.c:37
lapack_int
#define lapack_int
Definition: lapacke.h:47
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:40
LAPACK_TRANSPOSE_MEMORY_ERROR
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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:40

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