LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_ztbtrs_work()

lapack_int LAPACKE_ztbtrs_work ( int  matrix_layout,
char  uplo,
char  trans,
char  diag,
lapack_int  n,
lapack_int  kd,
lapack_int  nrhs,
const lapack_complex_double ab,
lapack_int  ldab,
lapack_complex_double b,
lapack_int  ldb 
)

Definition at line 36 of file lapacke_ztbtrs_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_ztbtrs( &uplo, &trans, &diag, &n, &kd, &nrhs, ab, &ldab, b, &ldb,
47  &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,kd+1);
53  lapack_int ldb_t = MAX(1,n);
54  lapack_complex_double* ab_t = NULL;
55  lapack_complex_double* b_t = NULL;
56  /* Check leading dimension(s) */
57  if( ldab < n ) {
58  info = -9;
59  LAPACKE_xerbla( "LAPACKE_ztbtrs_work", info );
60  return info;
61  }
62  if( ldb < nrhs ) {
63  info = -11;
64  LAPACKE_xerbla( "LAPACKE_ztbtrs_work", info );
65  return info;
66  }
67  /* Allocate memory for temporary array(s) */
68  ab_t = (lapack_complex_double*)
69  LAPACKE_malloc( sizeof(lapack_complex_double) * ldab_t * MAX(1,n) );
70  if( ab_t == NULL ) {
72  goto exit_level_0;
73  }
74  b_t = (lapack_complex_double*)
76  ldb_t * MAX(1,nrhs) );
77  if( b_t == NULL ) {
79  goto exit_level_1;
80  }
81  /* Transpose input matrices */
82  LAPACKE_ztb_trans( matrix_layout, uplo, diag, n, kd, ab, ldab, ab_t,
83  ldab_t );
84  LAPACKE_zge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
85  /* Call LAPACK function and adjust info */
86  LAPACK_ztbtrs( &uplo, &trans, &diag, &n, &kd, &nrhs, ab_t, &ldab_t, b_t,
87  &ldb_t, &info );
88  if( info < 0 ) {
89  info = info - 1;
90  }
91  /* Transpose output matrices */
92  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
93  /* Release memory and exit */
94  LAPACKE_free( b_t );
95 exit_level_1:
96  LAPACKE_free( ab_t );
97 exit_level_0:
98  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
99  LAPACKE_xerbla( "LAPACKE_ztbtrs_work", info );
100  }
101  } else {
102  info = -1;
103  LAPACKE_xerbla( "LAPACKE_ztbtrs_work", info );
104  }
105  return info;
106 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_double
Definition: lapacke.h:90
void LAPACKE_ztb_trans(int matrix_layout, char uplo, char diag, lapack_int n, lapack_int kd, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
void LAPACK_ztbtrs(char *uplo, char *trans, char *diag, lapack_int *n, lapack_int *kd, lapack_int *nrhs, const lapack_complex_double *ab, lapack_int *ldab, lapack_complex_double *b, lapack_int *ldb, lapack_int *info)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#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
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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