LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsbgv_work()

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

Definition at line 36 of file lapacke_dsbgv_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_dsbgv( &jobz, &uplo, &n, &ka, &kb, ab, &ldab, bb, &ldbb, w, z,
46  &ldz, work, &info );
47  if( info < 0 ) {
48  info = info - 1;
49  }
50  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
51  lapack_int ldab_t = MAX(1,ka+1);
52  lapack_int ldbb_t = MAX(1,kb+1);
53  lapack_int ldz_t = MAX(1,n);
54  double* ab_t = NULL;
55  double* bb_t = NULL;
56  double* z_t = NULL;
57  /* Check leading dimension(s) */
58  if( ldab < n ) {
59  info = -8;
60  LAPACKE_xerbla( "LAPACKE_dsbgv_work", info );
61  return info;
62  }
63  if( ldbb < n ) {
64  info = -10;
65  LAPACKE_xerbla( "LAPACKE_dsbgv_work", info );
66  return info;
67  }
68  if( ldz < n ) {
69  info = -13;
70  LAPACKE_xerbla( "LAPACKE_dsbgv_work", info );
71  return info;
72  }
73  /* Allocate memory for temporary array(s) */
74  ab_t = (double*)LAPACKE_malloc( sizeof(double) * ldab_t * MAX(1,n) );
75  if( ab_t == NULL ) {
77  goto exit_level_0;
78  }
79  bb_t = (double*)LAPACKE_malloc( sizeof(double) * ldbb_t * MAX(1,n) );
80  if( bb_t == NULL ) {
82  goto exit_level_1;
83  }
84  if( LAPACKE_lsame( jobz, 'v' ) ) {
85  z_t = (double*)LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,n) );
86  if( z_t == NULL ) {
88  goto exit_level_2;
89  }
90  }
91  /* Transpose input matrices */
92  LAPACKE_dsb_trans( matrix_layout, uplo, n, ka, ab, ldab, ab_t, ldab_t );
93  LAPACKE_dsb_trans( matrix_layout, uplo, n, kb, bb, ldbb, bb_t, ldbb_t );
94  /* Call LAPACK function and adjust info */
95  LAPACK_dsbgv( &jobz, &uplo, &n, &ka, &kb, ab_t, &ldab_t, bb_t, &ldbb_t,
96  w, z_t, &ldz_t, work, &info );
97  if( info < 0 ) {
98  info = info - 1;
99  }
100  /* Transpose output matrices */
101  LAPACKE_dsb_trans( LAPACK_COL_MAJOR, uplo, n, ka, ab_t, ldab_t, ab,
102  ldab );
103  LAPACKE_dsb_trans( LAPACK_COL_MAJOR, uplo, n, kb, bb_t, ldbb_t, bb,
104  ldbb );
105  if( LAPACKE_lsame( jobz, 'v' ) ) {
106  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
107  }
108  /* Release memory and exit */
109  if( LAPACKE_lsame( jobz, 'v' ) ) {
110  LAPACKE_free( z_t );
111  }
112 exit_level_2:
113  LAPACKE_free( bb_t );
114 exit_level_1:
115  LAPACKE_free( ab_t );
116 exit_level_0:
117  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
118  LAPACKE_xerbla( "LAPACKE_dsbgv_work", info );
119  }
120  } else {
121  info = -1;
122  LAPACKE_xerbla( "LAPACKE_dsbgv_work", info );
123  }
124  return info;
125 }
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
void LAPACK_dsbgv(char *jobz, char *uplo, lapack_int *n, lapack_int *ka, lapack_int *kb, double *ab, lapack_int *ldab, double *bb, lapack_int *ldbb, double *w, double *z, lapack_int *ldz, double *work, lapack_int *info)
void LAPACKE_dsb_trans(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#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
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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