LAPACK  3.6.1
LAPACK: Linear Algebra PACKage
lapack_int LAPACKE_zgbsv_work ( int  matrix_layout,
lapack_int  n,
lapack_int  kl,
lapack_int  ku,
lapack_int  nrhs,
lapack_complex_double *  ab,
lapack_int  ldab,
lapack_int *  ipiv,
lapack_complex_double *  b,
lapack_int  ldb 
)

Definition at line 36 of file lapacke_zgbsv_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_zgbsv( &n, &kl, &ku, &nrhs, ab, &ldab, ipiv, b, &ldb, &info );
46  if( info < 0 ) {
47  info = info - 1;
48  }
49  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50  lapack_int ldab_t = MAX(1,2*kl+ku+1);
51  lapack_int ldb_t = MAX(1,n);
52  lapack_complex_double* ab_t = NULL;
53  lapack_complex_double* b_t = NULL;
54  /* Check leading dimension(s) */
55  if( ldab < n ) {
56  info = -7;
57  LAPACKE_xerbla( "LAPACKE_zgbsv_work", info );
58  return info;
59  }
60  if( ldb < nrhs ) {
61  info = -10;
62  LAPACKE_xerbla( "LAPACKE_zgbsv_work", info );
63  return info;
64  }
65  /* Allocate memory for temporary array(s) */
66  ab_t = (lapack_complex_double*)
67  LAPACKE_malloc( sizeof(lapack_complex_double) * ldab_t * MAX(1,n) );
68  if( ab_t == NULL ) {
69  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
70  goto exit_level_0;
71  }
72  b_t = (lapack_complex_double*)
73  LAPACKE_malloc( sizeof(lapack_complex_double) *
74  ldb_t * MAX(1,nrhs) );
75  if( b_t == NULL ) {
76  info = LAPACK_TRANSPOSE_MEMORY_ERROR;
77  goto exit_level_1;
78  }
79  /* Transpose input matrices */
80  LAPACKE_zgb_trans( matrix_layout, n, n, kl, kl+ku, ab, ldab, ab_t,
81  ldab_t );
82  LAPACKE_zge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
83  /* Call LAPACK function and adjust info */
84  LAPACK_zgbsv( &n, &kl, &ku, &nrhs, ab_t, &ldab_t, ipiv, b_t, &ldb_t,
85  &info );
86  if( info < 0 ) {
87  info = info - 1;
88  }
89  /* Transpose output matrices */
90  LAPACKE_zgb_trans( LAPACK_COL_MAJOR, n, n, kl, kl+ku, ab_t, ldab_t, ab,
91  ldab );
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_zgbsv_work", info );
100  }
101  } else {
102  info = -1;
103  LAPACKE_xerbla( "LAPACKE_zgbsv_work", info );
104  }
105  return info;
106 }
LAPACK_ROW_MAJOR
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
lapack_complex_double
#define lapack_complex_double
Definition: lapacke.h:90
LAPACKE_zgb_trans
void LAPACKE_zgb_trans(int matrix_layout, lapack_int m, lapack_int n, lapack_int kl, lapack_int ku, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
Definition: lapacke_zgb_trans.c:40
LAPACK_zgbsv
void LAPACK_zgbsv(lapack_int *n, lapack_int *kl, lapack_int *ku, lapack_int *nrhs, lapack_complex_double *ab, lapack_int *ldab, lapack_int *ipiv, lapack_complex_double *b, lapack_int *ldb, lapack_int *info)
MAX
#define MAX(x, y)
Definition: lapacke_utils.h:47
LAPACKE_free
#define LAPACKE_free(p)
Definition: lapacke.h:113
LAPACKE_malloc
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
LAPACK_COL_MAJOR
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
LAPACKE_xerbla
void LAPACKE_xerbla(const char *name, lapack_int info)
Definition: lapacke_xerbla.c:37
lapack_int
#define lapack_int
Definition: lapacke.h:47
LAPACK_TRANSPOSE_MEMORY_ERROR
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
LAPACKE_zge_trans
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)
Definition: lapacke_zge_trans.c:40

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