LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zhbevx_2stage_work()

lapack_int LAPACKE_zhbevx_2stage_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,
lapack_int  lwork,
double *  rwork,
lapack_int iwork,
lapack_int ifail 
)

Definition at line 35 of file lapacke_zhbevx_2stage_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_2stage( &jobz, &range, &uplo, &n, &kd, ab, &ldab, q, &ldq, &vl,
50  &vu, &il, &iu, &abstol, m, w, z, &ldz, work, &lwork, 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_2stage_work", info );
69  return info;
70  }
71  if( ldq < n ) {
72  info = -10;
73  LAPACKE_xerbla( "LAPACKE_zhbevx_2stage_work", info );
74  return info;
75  }
76  if( ldz < ncols_z ) {
77  info = -19;
78  LAPACKE_xerbla( "LAPACKE_zhbevx_2stage_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 ) {
86  goto exit_level_0;
87  }
88  if( LAPACKE_lsame( jobz, 'v' ) ) {
89  q_t = (lapack_complex_double*)
91  ldq_t * MAX(1,n) );
92  if( q_t == NULL ) {
94  goto exit_level_1;
95  }
96  }
97  if( LAPACKE_lsame( jobz, 'v' ) ) {
98  z_t = (lapack_complex_double*)
100  ldz_t * MAX(1,ncols_z) );
101  if( z_t == NULL ) {
103  goto exit_level_2;
104  }
105  }
106  /* Query optimal working array(s) size if requested */
107  if( lwork == -1 ) {
108  LAPACK_zhbevx_2stage( &jobz, &range, &uplo, &n, &kd, ab_t, &ldab_t, q_t,
109  &ldq_t, &vl, &vu, &il, &iu, &abstol, m, w, z_t, &ldz_t,
110  work, &lwork, rwork, iwork, ifail, &info );
111  return (info < 0) ? (info - 1) : info;
112  }
113  /* Transpose input matrices */
114  LAPACKE_zhb_trans( matrix_layout, uplo, n, kd, ab, ldab, ab_t, ldab_t );
115  /* Call LAPACK function and adjust info */
116  LAPACK_zhbevx_2stage( &jobz, &range, &uplo, &n, &kd, ab_t, &ldab_t, q_t,
117  &ldq_t, &vl, &vu, &il, &iu, &abstol, m, w, z_t, &ldz_t,
118  work, &lwork, rwork, iwork, ifail, &info );
119  if( info < 0 ) {
120  info = info - 1;
121  }
122  /* Transpose output matrices */
123  LAPACKE_zhb_trans( LAPACK_COL_MAJOR, uplo, n, kd, ab_t, ldab_t, ab,
124  ldab );
125  if( LAPACKE_lsame( jobz, 'v' ) ) {
126  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
127  }
128  if( LAPACKE_lsame( jobz, 'v' ) ) {
129  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
130  ldz );
131  }
132  /* Release memory and exit */
133  if( LAPACKE_lsame( jobz, 'v' ) ) {
134  LAPACKE_free( z_t );
135  }
136 exit_level_2:
137  if( LAPACKE_lsame( jobz, 'v' ) ) {
138  LAPACKE_free( q_t );
139  }
140 exit_level_1:
141  LAPACKE_free( ab_t );
142 exit_level_0:
143  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
144  LAPACKE_xerbla( "LAPACKE_zhbevx_2stage_work", info );
145  }
146  } else {
147  info = -1;
148  LAPACKE_xerbla( "LAPACKE_zhbevx_2stage_work", info );
149  }
150  return info;
151 }
#define LAPACK_zhbevx_2stage(...)
Definition: lapack.h:6379
#define lapack_int
Definition: lapack.h:83
#define lapack_complex_double
Definition: lapack.h:63
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
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)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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)
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