LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sgtrfs_work()

lapack_int LAPACKE_sgtrfs_work ( int  matrix_layout,
char  trans,
lapack_int  n,
lapack_int  nrhs,
const float *  dl,
const float *  d,
const float *  du,
const float *  dlf,
const float *  df,
const float *  duf,
const float *  du2,
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_sgtrfs_work.c.

45 {
46  lapack_int info = 0;
47  if( matrix_layout == LAPACK_COL_MAJOR ) {
48  /* Call LAPACK function and adjust info */
49  LAPACK_sgtrfs( &trans, &n, &nrhs, dl, d, du, dlf, df, duf, du2, ipiv, b,
50  &ldb, x, &ldx, ferr, berr, work, iwork, &info );
51  if( info < 0 ) {
52  info = info - 1;
53  }
54  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
55  lapack_int ldb_t = MAX(1,n);
56  lapack_int ldx_t = MAX(1,n);
57  float* b_t = NULL;
58  float* x_t = NULL;
59  /* Check leading dimension(s) */
60  if( ldb < nrhs ) {
61  info = -14;
62  LAPACKE_xerbla( "LAPACKE_sgtrfs_work", info );
63  return info;
64  }
65  if( ldx < nrhs ) {
66  info = -16;
67  LAPACKE_xerbla( "LAPACKE_sgtrfs_work", info );
68  return info;
69  }
70  /* Allocate memory for temporary array(s) */
71  b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,nrhs) );
72  if( b_t == NULL ) {
74  goto exit_level_0;
75  }
76  x_t = (float*)LAPACKE_malloc( sizeof(float) * ldx_t * MAX(1,nrhs) );
77  if( x_t == NULL ) {
79  goto exit_level_1;
80  }
81  /* Transpose input matrices */
82  LAPACKE_sge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
83  LAPACKE_sge_trans( matrix_layout, n, nrhs, x, ldx, x_t, ldx_t );
84  /* Call LAPACK function and adjust info */
85  LAPACK_sgtrfs( &trans, &n, &nrhs, dl, d, du, dlf, df, duf, du2, ipiv,
86  b_t, &ldb_t, x_t, &ldx_t, ferr, berr, work, iwork,
87  &info );
88  if( info < 0 ) {
89  info = info - 1;
90  }
91  /* Transpose output matrices */
92  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
93  /* Release memory and exit */
94  LAPACKE_free( x_t );
95 exit_level_1:
96  LAPACKE_free( b_t );
97 exit_level_0:
98  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
99  LAPACKE_xerbla( "LAPACKE_sgtrfs_work", info );
100  }
101  } else {
102  info = -1;
103  LAPACKE_xerbla( "LAPACKE_sgtrfs_work", info );
104  }
105  return info;
106 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
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
void LAPACK_sgtrfs(char *trans, lapack_int *n, lapack_int *nrhs, const float *dl, const float *d, const float *du, const float *dlf, const float *df, const float *duf, const float *du2, 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)
#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
Here is the call graph for this function:
Here is the caller graph for this function: