LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsbgvd_work()

lapack_int LAPACKE_dsbgvd_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,
lapack_int  lwork,
lapack_int iwork,
lapack_int  liwork 
)

Definition at line 36 of file lapacke_dsbgvd_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_dsbgvd( &jobz, &uplo, &n, &ka, &kb, ab, &ldab, bb, &ldbb, w, z,
47  &ldz, work, &lwork, iwork, &liwork, &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,ka+1);
53  lapack_int ldbb_t = MAX(1,kb+1);
54  lapack_int ldz_t = MAX(1,n);
55  double* ab_t = NULL;
56  double* bb_t = NULL;
57  double* z_t = NULL;
58  /* Check leading dimension(s) */
59  if( ldab < n ) {
60  info = -8;
61  LAPACKE_xerbla( "LAPACKE_dsbgvd_work", info );
62  return info;
63  }
64  if( ldbb < n ) {
65  info = -10;
66  LAPACKE_xerbla( "LAPACKE_dsbgvd_work", info );
67  return info;
68  }
69  if( ldz < n ) {
70  info = -13;
71  LAPACKE_xerbla( "LAPACKE_dsbgvd_work", info );
72  return info;
73  }
74  /* Query optimal working array(s) size if requested */
75  if( liwork == -1 || lwork == -1 ) {
76  LAPACK_dsbgvd( &jobz, &uplo, &n, &ka, &kb, ab, &ldab_t, bb, &ldbb_t,
77  w, z, &ldz_t, work, &lwork, iwork, &liwork, &info );
78  return (info < 0) ? (info - 1) : info;
79  }
80  /* Allocate memory for temporary array(s) */
81  ab_t = (double*)LAPACKE_malloc( sizeof(double) * ldab_t * MAX(1,n) );
82  if( ab_t == NULL ) {
84  goto exit_level_0;
85  }
86  bb_t = (double*)LAPACKE_malloc( sizeof(double) * ldbb_t * MAX(1,n) );
87  if( bb_t == NULL ) {
89  goto exit_level_1;
90  }
91  if( LAPACKE_lsame( jobz, 'v' ) ) {
92  z_t = (double*)LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,n) );
93  if( z_t == NULL ) {
95  goto exit_level_2;
96  }
97  }
98  /* Transpose input matrices */
99  LAPACKE_dsb_trans( matrix_layout, uplo, n, ka, ab, ldab, ab_t, ldab_t );
100  LAPACKE_dsb_trans( matrix_layout, uplo, n, kb, bb, ldbb, bb_t, ldbb_t );
101  /* Call LAPACK function and adjust info */
102  LAPACK_dsbgvd( &jobz, &uplo, &n, &ka, &kb, ab_t, &ldab_t, bb_t, &ldbb_t,
103  w, z_t, &ldz_t, work, &lwork, iwork, &liwork, &info );
104  if( info < 0 ) {
105  info = info - 1;
106  }
107  /* Transpose output matrices */
108  LAPACKE_dsb_trans( LAPACK_COL_MAJOR, uplo, n, ka, ab_t, ldab_t, ab,
109  ldab );
110  LAPACKE_dsb_trans( LAPACK_COL_MAJOR, uplo, n, kb, bb_t, ldbb_t, bb,
111  ldbb );
112  if( LAPACKE_lsame( jobz, 'v' ) ) {
113  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
114  }
115  /* Release memory and exit */
116  if( LAPACKE_lsame( jobz, 'v' ) ) {
117  LAPACKE_free( z_t );
118  }
119 exit_level_2:
120  LAPACKE_free( bb_t );
121 exit_level_1:
122  LAPACKE_free( ab_t );
123 exit_level_0:
124  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
125  LAPACKE_xerbla( "LAPACKE_dsbgvd_work", info );
126  }
127  } else {
128  info = -1;
129  LAPACKE_xerbla( "LAPACKE_dsbgvd_work", info );
130  }
131  return info;
132 }
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_dsbgvd(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 *lwork, lapack_int *iwork, lapack_int *liwork, 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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