LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zgbrfs_work()

lapack_int LAPACKE_zgbrfs_work ( int  matrix_layout,
char  trans,
lapack_int  n,
lapack_int  kl,
lapack_int  ku,
lapack_int  nrhs,
const lapack_complex_double ab,
lapack_int  ldab,
const lapack_complex_double afb,
lapack_int  ldafb,
const lapack_int ipiv,
const lapack_complex_double b,
lapack_int  ldb,
lapack_complex_double x,
lapack_int  ldx,
double *  ferr,
double *  berr,
lapack_complex_double work,
double *  rwork 
)

Definition at line 36 of file lapacke_zgbrfs_work.c.

46 {
47  lapack_int info = 0;
48  if( matrix_layout == LAPACK_COL_MAJOR ) {
49  /* Call LAPACK function and adjust info */
50  LAPACK_zgbrfs( &trans, &n, &kl, &ku, &nrhs, ab, &ldab, afb, &ldafb,
51  ipiv, b, &ldb, x, &ldx, ferr, berr, work, rwork, &info );
52  if( info < 0 ) {
53  info = info - 1;
54  }
55  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
56  lapack_int ldab_t = MAX(1,kl+ku+1);
57  lapack_int ldafb_t = MAX(1,2*kl+ku+1);
58  lapack_int ldb_t = MAX(1,n);
59  lapack_int ldx_t = MAX(1,n);
60  lapack_complex_double* ab_t = NULL;
61  lapack_complex_double* afb_t = NULL;
62  lapack_complex_double* b_t = NULL;
63  lapack_complex_double* x_t = NULL;
64  /* Check leading dimension(s) */
65  if( ldab < n ) {
66  info = -8;
67  LAPACKE_xerbla( "LAPACKE_zgbrfs_work", info );
68  return info;
69  }
70  if( ldafb < n ) {
71  info = -10;
72  LAPACKE_xerbla( "LAPACKE_zgbrfs_work", info );
73  return info;
74  }
75  if( ldb < nrhs ) {
76  info = -13;
77  LAPACKE_xerbla( "LAPACKE_zgbrfs_work", info );
78  return info;
79  }
80  if( ldx < nrhs ) {
81  info = -15;
82  LAPACKE_xerbla( "LAPACKE_zgbrfs_work", info );
83  return info;
84  }
85  /* Allocate memory for temporary array(s) */
86  ab_t = (lapack_complex_double*)
87  LAPACKE_malloc( sizeof(lapack_complex_double) * ldab_t * MAX(1,n) );
88  if( ab_t == NULL ) {
90  goto exit_level_0;
91  }
92  afb_t = (lapack_complex_double*)
94  ldafb_t * MAX(1,n) );
95  if( afb_t == NULL ) {
97  goto exit_level_1;
98  }
99  b_t = (lapack_complex_double*)
101  ldb_t * MAX(1,nrhs) );
102  if( b_t == NULL ) {
104  goto exit_level_2;
105  }
106  x_t = (lapack_complex_double*)
108  ldx_t * MAX(1,nrhs) );
109  if( x_t == NULL ) {
111  goto exit_level_3;
112  }
113  /* Transpose input matrices */
114  LAPACKE_zgb_trans( matrix_layout, n, n, kl, ku, ab, ldab, ab_t, ldab_t );
115  LAPACKE_zgb_trans( matrix_layout, n, n, kl, kl+ku, afb, ldafb, afb_t,
116  ldafb_t );
117  LAPACKE_zge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
118  LAPACKE_zge_trans( matrix_layout, n, nrhs, x, ldx, x_t, ldx_t );
119  /* Call LAPACK function and adjust info */
120  LAPACK_zgbrfs( &trans, &n, &kl, &ku, &nrhs, ab_t, &ldab_t, afb_t,
121  &ldafb_t, ipiv, b_t, &ldb_t, x_t, &ldx_t, ferr, berr,
122  work, rwork, &info );
123  if( info < 0 ) {
124  info = info - 1;
125  }
126  /* Transpose output matrices */
127  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
128  /* Release memory and exit */
129  LAPACKE_free( x_t );
130 exit_level_3:
131  LAPACKE_free( b_t );
132 exit_level_2:
133  LAPACKE_free( afb_t );
134 exit_level_1:
135  LAPACKE_free( ab_t );
136 exit_level_0:
137  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
138  LAPACKE_xerbla( "LAPACKE_zgbrfs_work", info );
139  }
140  } else {
141  info = -1;
142  LAPACKE_xerbla( "LAPACKE_zgbrfs_work", info );
143  }
144  return info;
145 }
#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_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)
void LAPACK_zgbrfs(char *trans, lapack_int *n, lapack_int *kl, lapack_int *ku, lapack_int *nrhs, const lapack_complex_double *ab, lapack_int *ldab, const lapack_complex_double *afb, lapack_int *ldafb, const lapack_int *ipiv, const lapack_complex_double *b, lapack_int *ldb, lapack_complex_double *x, lapack_int *ldx, double *ferr, double *berr, lapack_complex_double *work, double *rwork, 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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