LAPACK  3.8.0
LAPACK: Linear Algebra PACKage
lapacke_zheevr_work.c
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28 *****************************************************************************
29 * Contents: Native middle-level C interface to LAPACK function zheevr
30 * Author: Intel Corporation
31 * Generated June 2017
32 *****************************************************************************/
33 
34 #include "lapacke_utils.h"
35 
36 lapack_int LAPACKE_zheevr_work( int matrix_layout, char jobz, char range,
37  char uplo, lapack_int n,
39  double vl, double vu, lapack_int il,
40  lapack_int iu, double abstol, lapack_int* m,
41  double* w, lapack_complex_double* z,
42  lapack_int ldz, lapack_int* isuppz,
43  lapack_complex_double* work, lapack_int lwork,
44  double* rwork, lapack_int lrwork,
45  lapack_int* iwork, lapack_int liwork )
46 {
47  lapack_int info = 0;
48  if( matrix_layout == LAPACK_COL_MAJOR ) {
49  /* Call LAPACK function and adjust info */
50  LAPACK_zheevr( &jobz, &range, &uplo, &n, a, &lda, &vl, &vu, &il, &iu,
51  &abstol, m, w, z, &ldz, isuppz, work, &lwork, rwork,
52  &lrwork, iwork, &liwork, &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( jobz, 'v' ) ) ? 1 :
58  ( LAPACKE_lsame( range, 'a' ) ||
59  LAPACKE_lsame( range, 'v' ) ) ? n :
60  ( LAPACKE_lsame( range, 'i' ) ? (iu-il+1) : 1);
61  lapack_int lda_t = MAX(1,n);
62  lapack_int ldz_t = MAX(1,n);
63  lapack_complex_double* a_t = NULL;
64  lapack_complex_double* z_t = NULL;
65  /* Check leading dimension(s) */
66  if( lda < n ) {
67  info = -7;
68  LAPACKE_xerbla( "LAPACKE_zheevr_work", info );
69  return info;
70  }
71  if( ldz < ncols_z ) {
72  info = -16;
73  LAPACKE_xerbla( "LAPACKE_zheevr_work", info );
74  return info;
75  }
76  /* Query optimal working array(s) size if requested */
77  if( liwork == -1 || lrwork == -1 || lwork == -1 ) {
78  LAPACK_zheevr( &jobz, &range, &uplo, &n, a, &lda_t, &vl, &vu, &il,
79  &iu, &abstol, m, w, z, &ldz_t, isuppz, work, &lwork,
80  rwork, &lrwork, iwork, &liwork, &info );
81  return (info < 0) ? (info - 1) : info;
82  }
83  /* Allocate memory for temporary array(s) */
84  a_t = (lapack_complex_double*)
85  LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
86  if( a_t == NULL ) {
88  goto exit_level_0;
89  }
90  if( LAPACKE_lsame( jobz, 'v' ) ) {
91  z_t = (lapack_complex_double*)
93  ldz_t * MAX(1,ncols_z) );
94  if( z_t == NULL ) {
96  goto exit_level_1;
97  }
98  }
99  /* Transpose input matrices */
100  LAPACKE_zhe_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
101  /* Call LAPACK function and adjust info */
102  LAPACK_zheevr( &jobz, &range, &uplo, &n, a_t, &lda_t, &vl, &vu, &il,
103  &iu, &abstol, m, w, z_t, &ldz_t, isuppz, work, &lwork,
104  rwork, &lrwork, iwork, &liwork, &info );
105  if( info < 0 ) {
106  info = info - 1;
107  }
108  /* Transpose output matrices */
109  LAPACKE_zhe_trans( LAPACK_COL_MAJOR, uplo, n, a_t, lda_t, a, lda );
110  if( LAPACKE_lsame( jobz, 'v' ) ) {
111  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
112  ldz );
113  }
114  /* Release memory and exit */
115  if( LAPACKE_lsame( jobz, 'v' ) ) {
116  LAPACKE_free( z_t );
117  }
118 exit_level_1:
119  LAPACKE_free( a_t );
120 exit_level_0:
121  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
122  LAPACKE_xerbla( "LAPACKE_zheevr_work", info );
123  }
124  } else {
125  info = -1;
126  LAPACKE_xerbla( "LAPACKE_zheevr_work", info );
127  }
128  return info;
129 }
#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
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_int LAPACKE_zheevr_work(int matrix_layout, char jobz, char range, char uplo, lapack_int n, lapack_complex_double *a, lapack_int lda, 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_int *isuppz, lapack_complex_double *work, lapack_int lwork, double *rwork, lapack_int lrwork, lapack_int *iwork, lapack_int liwork)
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)
void LAPACKE_zhe_trans(int matrix_layout, char uplo, lapack_int n, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
#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)
void LAPACK_zheevr(char *jobz, char *range, char *uplo, lapack_int *n, lapack_complex_double *a, lapack_int *lda, 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_int *isuppz, lapack_complex_double *work, lapack_int *lwork, double *rwork, lapack_int *lrwork, lapack_int *iwork, lapack_int *liwork, lapack_int *info)