LAPACK  3.6.1
LAPACK: Linear Algebra PACKage
lapack_int LAPACKE_zhpevx_work ( int  matrix_layout,
char  jobz,
char  range,
char  uplo,
lapack_int  n,
lapack_complex_double *  ap,
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_zhpevx_work.c.

44 {
45  lapack_int info = 0;
46  if( matrix_layout == LAPACK_COL_MAJOR ) {
47  /* Call LAPACK function and adjust info */
48  LAPACK_zhpevx( &jobz, &range, &uplo, &n, ap, &vl, &vu, &il, &iu,
49  &abstol, m, w, z, &ldz, work, rwork, iwork, ifail,
50  &info );
51  if( info < 0 ) {
52  info = info - 1;
53  }
54  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
55  lapack_int ncols_z = ( LAPACKE_lsame( range, 'a' ) ||
56  LAPACKE_lsame( range, 'v' ) ) ? n :
57  ( LAPACKE_lsame( range, 'i' ) ? (iu-il+1) : 1);
58  lapack_int ldz_t = MAX(1,n);
59  lapack_complex_double* z_t = NULL;
60  lapack_complex_double* ap_t = NULL;
61  /* Check leading dimension(s) */
62  if( ldz < ncols_z ) {
63  info = -15;
64  LAPACKE_xerbla( "LAPACKE_zhpevx_work", info );
65  return info;
66  }
67  /* Allocate memory for temporary array(s) */
68  if( LAPACKE_lsame( jobz, 'v' ) ) {
69  z_t = (lapack_complex_double*)
70  LAPACKE_malloc( sizeof(lapack_complex_double) *
71  ldz_t * MAX(1,ncols_z) );
72  if( z_t == NULL ) {
73  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
74  goto exit_level_0;
75  }
76  }
77  ap_t = (lapack_complex_double*)
78  LAPACKE_malloc( sizeof(lapack_complex_double) *
79  ( MAX(1,n) * MAX(2,n+1) ) / 2 );
80  if( ap_t == NULL ) {
81  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
82  goto exit_level_1;
83  }
84  /* Transpose input matrices */
85  LAPACKE_zhp_trans( matrix_layout, uplo, n, ap, ap_t );
86  /* Call LAPACK function and adjust info */
87  LAPACK_zhpevx( &jobz, &range, &uplo, &n, ap_t, &vl, &vu, &il, &iu,
88  &abstol, m, w, z_t, &ldz_t, work, rwork, iwork, ifail,
89  &info );
90  if( info < 0 ) {
91  info = info - 1;
92  }
93  /* Transpose output matrices */
94  if( LAPACKE_lsame( jobz, 'v' ) ) {
95  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
96  ldz );
97  }
98  LAPACKE_zhp_trans( LAPACK_COL_MAJOR, uplo, n, ap_t, ap );
99  /* Release memory and exit */
100  LAPACKE_free( ap_t );
101 exit_level_1:
102  if( LAPACKE_lsame( jobz, 'v' ) ) {
103  LAPACKE_free( z_t );
104  }
105 exit_level_0:
106  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
107  LAPACKE_xerbla( "LAPACKE_zhpevx_work", info );
108  }
109  } else {
110  info = -1;
111  LAPACKE_xerbla( "LAPACKE_zhpevx_work", info );
112  }
113  return info;
114 }
LAPACK_ROW_MAJOR
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
lapack_complex_double
#define lapack_complex_double
Definition: lapacke.h:90
LAPACKE_zhp_trans
void LAPACKE_zhp_trans(int matrix_layout, char uplo, lapack_int n, const lapack_complex_double *in, lapack_complex_double *out)
Definition: lapacke_zhp_trans.c:40
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
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
LAPACK_zhpevx
void LAPACK_zhpevx(char *jobz, char *range, char *uplo, lapack_int *n, lapack_complex_double *ap, 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)

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