LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_cgbrfs_work()

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

Definition at line 36 of file lapacke_cgbrfs_work.c.

45 {
46  lapack_int info = 0;
47  if( matrix_layout == LAPACK_COL_MAJOR ) {
48  /* Call LAPACK function and adjust info */
49  LAPACK_cgbrfs( &trans, &n, &kl, &ku, &nrhs, ab, &ldab, afb, &ldafb,
50  ipiv, b, &ldb, x, &ldx, ferr, berr, work, rwork, &info );
51  if( info < 0 ) {
52  info = info - 1;
53  }
54  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
55  lapack_int ldab_t = MAX(1,kl+ku+1);
56  lapack_int ldafb_t = MAX(1,2*kl+ku+1);
57  lapack_int ldb_t = MAX(1,n);
58  lapack_int ldx_t = MAX(1,n);
59  lapack_complex_float* ab_t = NULL;
60  lapack_complex_float* afb_t = NULL;
61  lapack_complex_float* b_t = NULL;
62  lapack_complex_float* x_t = NULL;
63  /* Check leading dimension(s) */
64  if( ldab < n ) {
65  info = -8;
66  LAPACKE_xerbla( "LAPACKE_cgbrfs_work", info );
67  return info;
68  }
69  if( ldafb < n ) {
70  info = -10;
71  LAPACKE_xerbla( "LAPACKE_cgbrfs_work", info );
72  return info;
73  }
74  if( ldb < nrhs ) {
75  info = -13;
76  LAPACKE_xerbla( "LAPACKE_cgbrfs_work", info );
77  return info;
78  }
79  if( ldx < nrhs ) {
80  info = -15;
81  LAPACKE_xerbla( "LAPACKE_cgbrfs_work", info );
82  return info;
83  }
84  /* Allocate memory for temporary array(s) */
85  ab_t = (lapack_complex_float*)
86  LAPACKE_malloc( sizeof(lapack_complex_float) * ldab_t * MAX(1,n) );
87  if( ab_t == NULL ) {
89  goto exit_level_0;
90  }
91  afb_t = (lapack_complex_float*)
92  LAPACKE_malloc( sizeof(lapack_complex_float) * ldafb_t * MAX(1,n) );
93  if( afb_t == NULL ) {
95  goto exit_level_1;
96  }
97  b_t = (lapack_complex_float*)
99  ldb_t * MAX(1,nrhs) );
100  if( b_t == NULL ) {
102  goto exit_level_2;
103  }
104  x_t = (lapack_complex_float*)
106  ldx_t * MAX(1,nrhs) );
107  if( x_t == NULL ) {
109  goto exit_level_3;
110  }
111  /* Transpose input matrices */
112  LAPACKE_cgb_trans( matrix_layout, n, n, kl, ku, ab, ldab, ab_t, ldab_t );
113  LAPACKE_cgb_trans( matrix_layout, n, n, kl, kl+ku, afb, ldafb, afb_t,
114  ldafb_t );
115  LAPACKE_cge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
116  LAPACKE_cge_trans( matrix_layout, n, nrhs, x, ldx, x_t, ldx_t );
117  /* Call LAPACK function and adjust info */
118  LAPACK_cgbrfs( &trans, &n, &kl, &ku, &nrhs, ab_t, &ldab_t, afb_t,
119  &ldafb_t, ipiv, b_t, &ldb_t, x_t, &ldx_t, ferr, berr,
120  work, rwork, &info );
121  if( info < 0 ) {
122  info = info - 1;
123  }
124  /* Transpose output matrices */
125  LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
126  /* Release memory and exit */
127  LAPACKE_free( x_t );
128 exit_level_3:
129  LAPACKE_free( b_t );
130 exit_level_2:
131  LAPACKE_free( afb_t );
132 exit_level_1:
133  LAPACKE_free( ab_t );
134 exit_level_0:
135  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
136  LAPACKE_xerbla( "LAPACKE_cgbrfs_work", info );
137  }
138  } else {
139  info = -1;
140  LAPACKE_xerbla( "LAPACKE_cgbrfs_work", info );
141  }
142  return info;
143 }
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)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_float
Definition: lapacke.h:74
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)
void LAPACK_cgbrfs(char *trans, lapack_int *n, lapack_int *kl, lapack_int *ku, lapack_int *nrhs, const lapack_complex_float *ab, lapack_int *ldab, const lapack_complex_float *afb, lapack_int *ldafb, const lapack_int *ipiv, const lapack_complex_float *b, lapack_int *ldb, lapack_complex_float *x, lapack_int *ldx, float *ferr, float *berr, lapack_complex_float *work, float *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
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