LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zhbev_work()

lapack_int LAPACKE_zhbev_work ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
lapack_int  kd,
lapack_complex_double ab,
lapack_int  ldab,
double *  w,
lapack_complex_double z,
lapack_int  ldz,
lapack_complex_double work,
double *  rwork 
)

Definition at line 36 of file lapacke_zhbev_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_zhbev( &jobz, &uplo, &n, &kd, ab, &ldab, w, z, &ldz, work, rwork,
47  &info );
48  if( info < 0 ) {
49  info = info - 1;
50  }
51  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
52  lapack_int ldab_t = MAX(1,kd+1);
53  lapack_int ldz_t = MAX(1,n);
54  lapack_complex_double* ab_t = NULL;
55  lapack_complex_double* z_t = NULL;
56  /* Check leading dimension(s) */
57  if( ldab < n ) {
58  info = -7;
59  LAPACKE_xerbla( "LAPACKE_zhbev_work", info );
60  return info;
61  }
62  if( ldz < n ) {
63  info = -10;
64  LAPACKE_xerbla( "LAPACKE_zhbev_work", info );
65  return info;
66  }
67  /* Allocate memory for temporary array(s) */
68  ab_t = (lapack_complex_double*)
69  LAPACKE_malloc( sizeof(lapack_complex_double) * ldab_t * MAX(1,n) );
70  if( ab_t == NULL ) {
72  goto exit_level_0;
73  }
74  if( LAPACKE_lsame( jobz, 'v' ) ) {
75  z_t = (lapack_complex_double*)
77  ldz_t * MAX(1,n) );
78  if( z_t == NULL ) {
80  goto exit_level_1;
81  }
82  }
83  /* Transpose input matrices */
84  LAPACKE_zhb_trans( matrix_layout, uplo, n, kd, ab, ldab, ab_t, ldab_t );
85  /* Call LAPACK function and adjust info */
86  LAPACK_zhbev( &jobz, &uplo, &n, &kd, ab_t, &ldab_t, w, z_t, &ldz_t,
87  work, rwork, &info );
88  if( info < 0 ) {
89  info = info - 1;
90  }
91  /* Transpose output matrices */
92  LAPACKE_zhb_trans( LAPACK_COL_MAJOR, uplo, n, kd, ab_t, ldab_t, ab,
93  ldab );
94  if( LAPACKE_lsame( jobz, 'v' ) ) {
95  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
96  }
97  /* Release memory and exit */
98  if( LAPACKE_lsame( jobz, 'v' ) ) {
99  LAPACKE_free( z_t );
100  }
101 exit_level_1:
102  LAPACKE_free( ab_t );
103 exit_level_0:
104  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
105  LAPACKE_xerbla( "LAPACKE_zhbev_work", info );
106  }
107  } else {
108  info = -1;
109  LAPACKE_xerbla( "LAPACKE_zhbev_work", info );
110  }
111  return info;
112 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_double
Definition: lapacke.h:90
void LAPACK_zhbev(char *jobz, char *uplo, lapack_int *n, lapack_int *kd, lapack_complex_double *ab, lapack_int *ldab, double *w, lapack_complex_double *z, lapack_int *ldz, lapack_complex_double *work, double *rwork, lapack_int *info)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
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)
#define lapack_int
Definition: lapacke.h:47
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)
#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)
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