LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zhbgv_work()

lapack_int LAPACKE_zhbgv_work ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
lapack_int  ka,
lapack_int  kb,
lapack_complex_double ab,
lapack_int  ldab,
lapack_complex_double bb,
lapack_int  ldbb,
double *  w,
lapack_complex_double z,
lapack_int  ldz,
lapack_complex_double work,
double *  rwork 
)

Definition at line 36 of file lapacke_zhbgv_work.c.

43 {
44  lapack_int info = 0;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_zhbgv( &jobz, &uplo, &n, &ka, &kb, ab, &ldab, bb, &ldbb, w, z,
48  &ldz, work, rwork, &info );
49  if( info < 0 ) {
50  info = info - 1;
51  }
52  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
53  lapack_int ldab_t = MAX(1,ka+1);
54  lapack_int ldbb_t = MAX(1,kb+1);
55  lapack_int ldz_t = MAX(1,n);
56  lapack_complex_double* ab_t = NULL;
57  lapack_complex_double* bb_t = NULL;
58  lapack_complex_double* z_t = NULL;
59  /* Check leading dimension(s) */
60  if( ldab < n ) {
61  info = -8;
62  LAPACKE_xerbla( "LAPACKE_zhbgv_work", info );
63  return info;
64  }
65  if( ldbb < n ) {
66  info = -10;
67  LAPACKE_xerbla( "LAPACKE_zhbgv_work", info );
68  return info;
69  }
70  if( ldz < n ) {
71  info = -13;
72  LAPACKE_xerbla( "LAPACKE_zhbgv_work", info );
73  return info;
74  }
75  /* Allocate memory for temporary array(s) */
76  ab_t = (lapack_complex_double*)
77  LAPACKE_malloc( sizeof(lapack_complex_double) * ldab_t * MAX(1,n) );
78  if( ab_t == NULL ) {
80  goto exit_level_0;
81  }
82  bb_t = (lapack_complex_double*)
83  LAPACKE_malloc( sizeof(lapack_complex_double) * ldbb_t * MAX(1,n) );
84  if( bb_t == NULL ) {
86  goto exit_level_1;
87  }
88  if( LAPACKE_lsame( jobz, 'v' ) ) {
89  z_t = (lapack_complex_double*)
91  ldz_t * MAX(1,n) );
92  if( z_t == NULL ) {
94  goto exit_level_2;
95  }
96  }
97  /* Transpose input matrices */
98  LAPACKE_zhb_trans( matrix_layout, uplo, n, ka, ab, ldab, ab_t, ldab_t );
99  LAPACKE_zhb_trans( matrix_layout, uplo, n, kb, bb, ldbb, bb_t, ldbb_t );
100  /* Call LAPACK function and adjust info */
101  LAPACK_zhbgv( &jobz, &uplo, &n, &ka, &kb, ab_t, &ldab_t, bb_t, &ldbb_t,
102  w, z_t, &ldz_t, work, rwork, &info );
103  if( info < 0 ) {
104  info = info - 1;
105  }
106  /* Transpose output matrices */
107  LAPACKE_zhb_trans( LAPACK_COL_MAJOR, uplo, n, ka, ab_t, ldab_t, ab,
108  ldab );
109  LAPACKE_zhb_trans( LAPACK_COL_MAJOR, uplo, n, kb, bb_t, ldbb_t, bb,
110  ldbb );
111  if( LAPACKE_lsame( jobz, 'v' ) ) {
112  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
113  }
114  /* Release memory and exit */
115  if( LAPACKE_lsame( jobz, 'v' ) ) {
116  LAPACKE_free( z_t );
117  }
118 exit_level_2:
119  LAPACKE_free( bb_t );
120 exit_level_1:
121  LAPACKE_free( ab_t );
122 exit_level_0:
123  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
124  LAPACKE_xerbla( "LAPACKE_zhbgv_work", info );
125  }
126  } else {
127  info = -1;
128  LAPACKE_xerbla( "LAPACKE_zhbgv_work", info );
129  }
130  return info;
131 }
#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_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 LAPACK_zhbgv(char *jobz, char *uplo, lapack_int *n, lapack_int *ka, lapack_int *kb, lapack_complex_double *ab, lapack_int *ldab, lapack_complex_double *bb, lapack_int *ldbb, double *w, lapack_complex_double *z, lapack_int *ldz, lapack_complex_double *work, double *rwork, 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)
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