LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_cgbsv_work()

lapack_int LAPACKE_cgbsv_work ( int  matrix_layout,
lapack_int  n,
lapack_int  kl,
lapack_int  ku,
lapack_int  nrhs,
lapack_complex_float ab,
lapack_int  ldab,
lapack_int ipiv,
lapack_complex_float b,
lapack_int  ldb 
)

Definition at line 35 of file lapacke_cgbsv_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_cgbsv( &n, &kl, &ku, &nrhs, ab, &ldab, ipiv, b, &ldb, &info );
45  if( info < 0 ) {
46  info = info - 1;
47  }
48  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
49  lapack_int ldab_t = MAX(1,2*kl+ku+1);
50  lapack_int ldb_t = MAX(1,n);
51  lapack_complex_float* ab_t = NULL;
52  lapack_complex_float* b_t = NULL;
53  /* Check leading dimension(s) */
54  if( ldab < n ) {
55  info = -7;
56  LAPACKE_xerbla( "LAPACKE_cgbsv_work", info );
57  return info;
58  }
59  if( ldb < nrhs ) {
60  info = -10;
61  LAPACKE_xerbla( "LAPACKE_cgbsv_work", info );
62  return info;
63  }
64  /* Allocate memory for temporary array(s) */
65  ab_t = (lapack_complex_float*)
66  LAPACKE_malloc( sizeof(lapack_complex_float) * ldab_t * MAX(1,n) );
67  if( ab_t == NULL ) {
69  goto exit_level_0;
70  }
71  b_t = (lapack_complex_float*)
73  ldb_t * MAX(1,nrhs) );
74  if( b_t == NULL ) {
76  goto exit_level_1;
77  }
78  /* Transpose input matrices */
79  LAPACKE_cgb_trans( matrix_layout, n, n, kl, kl+ku, ab, ldab, ab_t,
80  ldab_t );
81  LAPACKE_cge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
82  /* Call LAPACK function and adjust info */
83  LAPACK_cgbsv( &n, &kl, &ku, &nrhs, ab_t, &ldab_t, ipiv, b_t, &ldb_t,
84  &info );
85  if( info < 0 ) {
86  info = info - 1;
87  }
88  /* Transpose output matrices */
89  LAPACKE_cgb_trans( LAPACK_COL_MAJOR, n, n, kl, kl+ku, ab_t, ldab_t, ab,
90  ldab );
91  LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
92  /* Release memory and exit */
93  LAPACKE_free( b_t );
94 exit_level_1:
95  LAPACKE_free( ab_t );
96 exit_level_0:
97  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
98  LAPACKE_xerbla( "LAPACKE_cgbsv_work", info );
99  }
100  } else {
101  info = -1;
102  LAPACKE_xerbla( "LAPACKE_cgbsv_work", info );
103  }
104  return info;
105 }
void LAPACK_cgbsv(lapack_int const *n, lapack_int const *kl, lapack_int const *ku, lapack_int const *nrhs, lapack_complex_float *AB, lapack_int const *ldab, lapack_int *ipiv, lapack_complex_float *B, lapack_int const *ldb, lapack_int *info)
#define lapack_int
Definition: lapack.h:83
#define lapack_complex_float
Definition: lapack.h:45
#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)
void LAPACKE_cgb_trans(int matrix_layout, lapack_int m, lapack_int n, lapack_int kl, lapack_int ku, const lapack_complex_float *in, lapack_int ldin, lapack_complex_float *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:46
void LAPACKE_cge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *in, lapack_int ldin, lapack_complex_float *out, lapack_int ldout)
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