LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sgbrfs_work()

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

Definition at line 36 of file lapacke_sgbrfs_work.c.

44 {
45  lapack_int info = 0;
46  if( matrix_layout == LAPACK_COL_MAJOR ) {
47  /* Call LAPACK function and adjust info */
48  LAPACK_sgbrfs( &trans, &n, &kl, &ku, &nrhs, ab, &ldab, afb, &ldafb,
49  ipiv, b, &ldb, x, &ldx, ferr, berr, work, iwork, &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  float* ab_t = NULL;
59  float* afb_t = NULL;
60  float* b_t = NULL;
61  float* x_t = NULL;
62  /* Check leading dimension(s) */
63  if( ldab < n ) {
64  info = -8;
65  LAPACKE_xerbla( "LAPACKE_sgbrfs_work", info );
66  return info;
67  }
68  if( ldafb < n ) {
69  info = -10;
70  LAPACKE_xerbla( "LAPACKE_sgbrfs_work", info );
71  return info;
72  }
73  if( ldb < nrhs ) {
74  info = -13;
75  LAPACKE_xerbla( "LAPACKE_sgbrfs_work", info );
76  return info;
77  }
78  if( ldx < nrhs ) {
79  info = -15;
80  LAPACKE_xerbla( "LAPACKE_sgbrfs_work", info );
81  return info;
82  }
83  /* Allocate memory for temporary array(s) */
84  ab_t = (float*)LAPACKE_malloc( sizeof(float) * ldab_t * MAX(1,n) );
85  if( ab_t == NULL ) {
87  goto exit_level_0;
88  }
89  afb_t = (float*)LAPACKE_malloc( sizeof(float) * ldafb_t * MAX(1,n) );
90  if( afb_t == NULL ) {
92  goto exit_level_1;
93  }
94  b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,nrhs) );
95  if( b_t == NULL ) {
97  goto exit_level_2;
98  }
99  x_t = (float*)LAPACKE_malloc( sizeof(float) * ldx_t * MAX(1,nrhs) );
100  if( x_t == NULL ) {
102  goto exit_level_3;
103  }
104  /* Transpose input matrices */
105  LAPACKE_sgb_trans( matrix_layout, n, n, kl, ku, ab, ldab, ab_t, ldab_t );
106  LAPACKE_sgb_trans( matrix_layout, n, n, kl, kl+ku, afb, ldafb, afb_t,
107  ldafb_t );
108  LAPACKE_sge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
109  LAPACKE_sge_trans( matrix_layout, n, nrhs, x, ldx, x_t, ldx_t );
110  /* Call LAPACK function and adjust info */
111  LAPACK_sgbrfs( &trans, &n, &kl, &ku, &nrhs, ab_t, &ldab_t, afb_t,
112  &ldafb_t, ipiv, b_t, &ldb_t, x_t, &ldx_t, ferr, berr,
113  work, iwork, &info );
114  if( info < 0 ) {
115  info = info - 1;
116  }
117  /* Transpose output matrices */
118  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
119  /* Release memory and exit */
120  LAPACKE_free( x_t );
121 exit_level_3:
122  LAPACKE_free( b_t );
123 exit_level_2:
124  LAPACKE_free( afb_t );
125 exit_level_1:
126  LAPACKE_free( ab_t );
127 exit_level_0:
128  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
129  LAPACKE_xerbla( "LAPACKE_sgbrfs_work", info );
130  }
131  } else {
132  info = -1;
133  LAPACKE_xerbla( "LAPACKE_sgbrfs_work", info );
134  }
135  return info;
136 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
void LAPACK_sgbrfs(char *trans, lapack_int *n, lapack_int *kl, lapack_int *ku, lapack_int *nrhs, const float *ab, lapack_int *ldab, const float *afb, lapack_int *ldafb, const lapack_int *ipiv, const float *b, lapack_int *ldb, float *x, lapack_int *ldx, float *ferr, float *berr, float *work, lapack_int *iwork, lapack_int *info)
void LAPACKE_sge_trans(int matrix_layout, lapack_int m, lapack_int n, const float *in, lapack_int ldin, float *out, lapack_int ldout)
#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)
void LAPACKE_sgb_trans(int matrix_layout, lapack_int m, lapack_int n, lapack_int kl, lapack_int ku, const float *in, lapack_int ldin, float *out, lapack_int ldout)
#define lapack_int
Definition: lapacke.h:47
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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