LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zgtrfs_work()

lapack_int LAPACKE_zgtrfs_work ( int  matrix_layout,
char  trans,
lapack_int  n,
lapack_int  nrhs,
const lapack_complex_double dl,
const lapack_complex_double d,
const lapack_complex_double du,
const lapack_complex_double dlf,
const lapack_complex_double df,
const lapack_complex_double duf,
const lapack_complex_double du2,
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_zgtrfs_work.c.

50 {
51  lapack_int info = 0;
52  if( matrix_layout == LAPACK_COL_MAJOR ) {
53  /* Call LAPACK function and adjust info */
54  LAPACK_zgtrfs( &trans, &n, &nrhs, dl, d, du, dlf, df, duf, du2, ipiv, b,
55  &ldb, x, &ldx, ferr, berr, work, rwork, &info );
56  if( info < 0 ) {
57  info = info - 1;
58  }
59  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
60  lapack_int ldb_t = MAX(1,n);
61  lapack_int ldx_t = MAX(1,n);
62  lapack_complex_double* b_t = NULL;
63  lapack_complex_double* x_t = NULL;
64  /* Check leading dimension(s) */
65  if( ldb < nrhs ) {
66  info = -14;
67  LAPACKE_xerbla( "LAPACKE_zgtrfs_work", info );
68  return info;
69  }
70  if( ldx < nrhs ) {
71  info = -16;
72  LAPACKE_xerbla( "LAPACKE_zgtrfs_work", info );
73  return info;
74  }
75  /* Allocate memory for temporary array(s) */
76  b_t = (lapack_complex_double*)
78  ldb_t * MAX(1,nrhs) );
79  if( b_t == NULL ) {
81  goto exit_level_0;
82  }
83  x_t = (lapack_complex_double*)
85  ldx_t * MAX(1,nrhs) );
86  if( x_t == NULL ) {
88  goto exit_level_1;
89  }
90  /* Transpose input matrices */
91  LAPACKE_zge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
92  LAPACKE_zge_trans( matrix_layout, n, nrhs, x, ldx, x_t, ldx_t );
93  /* Call LAPACK function and adjust info */
94  LAPACK_zgtrfs( &trans, &n, &nrhs, dl, d, du, dlf, df, duf, du2, ipiv,
95  b_t, &ldb_t, x_t, &ldx_t, ferr, berr, work, rwork,
96  &info );
97  if( info < 0 ) {
98  info = info - 1;
99  }
100  /* Transpose output matrices */
101  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
102  /* Release memory and exit */
103  LAPACKE_free( x_t );
104 exit_level_1:
105  LAPACKE_free( b_t );
106 exit_level_0:
107  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
108  LAPACKE_xerbla( "LAPACKE_zgtrfs_work", info );
109  }
110  } else {
111  info = -1;
112  LAPACKE_xerbla( "LAPACKE_zgtrfs_work", info );
113  }
114  return info;
115 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_double
Definition: lapacke.h:90
#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
void LAPACK_zgtrfs(char *trans, lapack_int *n, lapack_int *nrhs, const lapack_complex_double *dl, const lapack_complex_double *d, const lapack_complex_double *du, const lapack_complex_double *dlf, const lapack_complex_double *df, const lapack_complex_double *duf, const lapack_complex_double *du2, 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 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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