LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsbgst_work()

lapack_int LAPACKE_dsbgst_work ( int  matrix_layout,
char  vect,
char  uplo,
lapack_int  n,
lapack_int  ka,
lapack_int  kb,
double *  ab,
lapack_int  ldab,
const double *  bb,
lapack_int  ldbb,
double *  x,
lapack_int  ldx,
double *  work 
)

Definition at line 36 of file lapacke_dsbgst_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_dsbgst( &vect, &uplo, &n, &ka, &kb, ab, &ldab, bb, &ldbb, x,
46  &ldx, 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 ldx_t = MAX(1,n);
54  double* ab_t = NULL;
55  double* bb_t = NULL;
56  double* x_t = NULL;
57  /* Check leading dimension(s) */
58  if( ldab < n ) {
59  info = -8;
60  LAPACKE_xerbla( "LAPACKE_dsbgst_work", info );
61  return info;
62  }
63  if( ldbb < n ) {
64  info = -10;
65  LAPACKE_xerbla( "LAPACKE_dsbgst_work", info );
66  return info;
67  }
68  if( ldx < n ) {
69  info = -12;
70  LAPACKE_xerbla( "LAPACKE_dsbgst_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( vect, 'v' ) ) {
85  x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,n) );
86  if( x_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_dsbgst( &vect, &uplo, &n, &ka, &kb, ab_t, &ldab_t, bb_t, &ldbb_t,
96  x_t, &ldx_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  if( LAPACKE_lsame( vect, 'v' ) ) {
104  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, x_t, ldx_t, x, ldx );
105  }
106  /* Release memory and exit */
107  if( LAPACKE_lsame( vect, 'v' ) ) {
108  LAPACKE_free( x_t );
109  }
110 exit_level_2:
111  LAPACKE_free( bb_t );
112 exit_level_1:
113  LAPACKE_free( ab_t );
114 exit_level_0:
115  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
116  LAPACKE_xerbla( "LAPACKE_dsbgst_work", info );
117  }
118  } else {
119  info = -1;
120  LAPACKE_xerbla( "LAPACKE_dsbgst_work", info );
121  }
122  return info;
123 }
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
void LAPACK_dsbgst(char *vect, char *uplo, lapack_int *n, lapack_int *ka, lapack_int *kb, double *ab, lapack_int *ldab, const double *bb, lapack_int *ldbb, double *x, lapack_int *ldx, double *work, lapack_int *info)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
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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