LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dtbtrs_work()

lapack_int LAPACKE_dtbtrs_work ( int  matrix_layout,
char  uplo,
char  trans,
char  diag,
lapack_int  n,
lapack_int  kd,
lapack_int  nrhs,
const double *  ab,
lapack_int  ldab,
double *  b,
lapack_int  ldb 
)

Definition at line 35 of file lapacke_dtbtrs_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_dtbtrs( &uplo, &trans, &diag, &n, &kd, &nrhs, ab, &ldab, b, &ldb,
44  &info );
45  if( info < 0 ) {
46  info = info - 1;
47  }
48  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
49  lapack_int ldab_t = MAX(1,kd+1);
50  lapack_int ldb_t = MAX(1,n);
51  double* ab_t = NULL;
52  double* b_t = NULL;
53  /* Check leading dimension(s) */
54  if( ldab < n ) {
55  info = -9;
56  LAPACKE_xerbla( "LAPACKE_dtbtrs_work", info );
57  return info;
58  }
59  if( ldb < nrhs ) {
60  info = -11;
61  LAPACKE_xerbla( "LAPACKE_dtbtrs_work", info );
62  return info;
63  }
64  /* Allocate memory for temporary array(s) */
65  ab_t = (double*)LAPACKE_malloc( sizeof(double) * ldab_t * MAX(1,n) );
66  if( ab_t == NULL ) {
68  goto exit_level_0;
69  }
70  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
71  if( b_t == NULL ) {
73  goto exit_level_1;
74  }
75  /* Transpose input matrices */
76  LAPACKE_dtb_trans( matrix_layout, uplo, diag, n, kd, ab, ldab, ab_t,
77  ldab_t );
78  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
79  /* Call LAPACK function and adjust info */
80  LAPACK_dtbtrs( &uplo, &trans, &diag, &n, &kd, &nrhs, ab_t, &ldab_t, b_t,
81  &ldb_t, &info );
82  if( info < 0 ) {
83  info = info - 1;
84  }
85  /* Transpose output matrices */
86  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
87  /* Release memory and exit */
88  LAPACKE_free( b_t );
89 exit_level_1:
90  LAPACKE_free( ab_t );
91 exit_level_0:
92  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
93  LAPACKE_xerbla( "LAPACKE_dtbtrs_work", info );
94  }
95  } else {
96  info = -1;
97  LAPACKE_xerbla( "LAPACKE_dtbtrs_work", info );
98  }
99  return info;
100 }
#define LAPACK_dtbtrs(...)
Definition: lapack.h:19734
#define lapack_int
Definition: lapack.h:83
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
void LAPACKE_xerbla(const char *name, lapack_int info)
#define MAX(x, y)
Definition: lapacke_utils.h:46
void LAPACKE_dtb_trans(int matrix_layout, char uplo, char diag, lapack_int n, lapack_int kd, const double *in, lapack_int ldin, double *out, lapack_int ldout)
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
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