LAPACK  3.10.0
LAPACK: Linear Algebra PACKage
lapacke_cgbrfs_work.c
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28 *****************************************************************************
29 * Contents: Native middle-level C interface to LAPACK function cgbrfs
30 * Author: Intel Corporation
31 *****************************************************************************/
32 
33 #include "lapacke_utils.h"
34 
35 lapack_int LAPACKE_cgbrfs_work( int matrix_layout, char trans, lapack_int n,
36  lapack_int kl, lapack_int ku, lapack_int nrhs,
37  const lapack_complex_float* ab, lapack_int ldab,
38  const lapack_complex_float* afb,
39  lapack_int ldafb, const lapack_int* ipiv,
40  const lapack_complex_float* b, lapack_int ldb,
42  float* ferr, float* berr,
43  lapack_complex_float* work, float* rwork )
44 {
45  lapack_int info = 0;
46  if( matrix_layout == LAPACK_COL_MAJOR ) {
47  /* Call LAPACK function and adjust info */
48  LAPACK_cgbrfs( &trans, &n, &kl, &ku, &nrhs, ab, &ldab, afb, &ldafb,
49  ipiv, b, &ldb, x, &ldx, ferr, berr, work, rwork, &info );
50  if( info < 0 ) {
51  info = info - 1;
52  }
53  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
54  lapack_int ldab_t = MAX(1,kl+ku+1);
55  lapack_int ldafb_t = MAX(1,2*kl+ku+1);
56  lapack_int ldb_t = MAX(1,n);
57  lapack_int ldx_t = MAX(1,n);
58  lapack_complex_float* ab_t = NULL;
59  lapack_complex_float* afb_t = NULL;
60  lapack_complex_float* b_t = NULL;
61  lapack_complex_float* x_t = NULL;
62  /* Check leading dimension(s) */
63  if( ldab < n ) {
64  info = -8;
65  LAPACKE_xerbla( "LAPACKE_cgbrfs_work", info );
66  return info;
67  }
68  if( ldafb < n ) {
69  info = -10;
70  LAPACKE_xerbla( "LAPACKE_cgbrfs_work", info );
71  return info;
72  }
73  if( ldb < nrhs ) {
74  info = -13;
75  LAPACKE_xerbla( "LAPACKE_cgbrfs_work", info );
76  return info;
77  }
78  if( ldx < nrhs ) {
79  info = -15;
80  LAPACKE_xerbla( "LAPACKE_cgbrfs_work", info );
81  return info;
82  }
83  /* Allocate memory for temporary array(s) */
84  ab_t = (lapack_complex_float*)
85  LAPACKE_malloc( sizeof(lapack_complex_float) * ldab_t * MAX(1,n) );
86  if( ab_t == NULL ) {
88  goto exit_level_0;
89  }
90  afb_t = (lapack_complex_float*)
91  LAPACKE_malloc( sizeof(lapack_complex_float) * ldafb_t * MAX(1,n) );
92  if( afb_t == NULL ) {
94  goto exit_level_1;
95  }
96  b_t = (lapack_complex_float*)
98  ldb_t * MAX(1,nrhs) );
99  if( b_t == NULL ) {
101  goto exit_level_2;
102  }
103  x_t = (lapack_complex_float*)
105  ldx_t * MAX(1,nrhs) );
106  if( x_t == NULL ) {
108  goto exit_level_3;
109  }
110  /* Transpose input matrices */
111  LAPACKE_cgb_trans( matrix_layout, n, n, kl, ku, ab, ldab, ab_t, ldab_t );
112  LAPACKE_cgb_trans( matrix_layout, n, n, kl, kl+ku, afb, ldafb, afb_t,
113  ldafb_t );
114  LAPACKE_cge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
115  LAPACKE_cge_trans( matrix_layout, n, nrhs, x, ldx, x_t, ldx_t );
116  /* Call LAPACK function and adjust info */
117  LAPACK_cgbrfs( &trans, &n, &kl, &ku, &nrhs, ab_t, &ldab_t, afb_t,
118  &ldafb_t, ipiv, b_t, &ldb_t, x_t, &ldx_t, ferr, berr,
119  work, rwork, &info );
120  if( info < 0 ) {
121  info = info - 1;
122  }
123  /* Transpose output matrices */
124  LAPACKE_cge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
125  /* Release memory and exit */
126  LAPACKE_free( x_t );
127 exit_level_3:
128  LAPACKE_free( b_t );
129 exit_level_2:
130  LAPACKE_free( afb_t );
131 exit_level_1:
132  LAPACKE_free( ab_t );
133 exit_level_0:
134  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
135  LAPACKE_xerbla( "LAPACKE_cgbrfs_work", info );
136  }
137  } else {
138  info = -1;
139  LAPACKE_xerbla( "LAPACKE_cgbrfs_work", info );
140  }
141  return info;
142 }
#define LAPACK_cgbrfs(...)
Definition: lapack.h:738
#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
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)
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)