LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgtsvx_work()

lapack_int LAPACKE_dgtsvx_work ( int  matrix_layout,
char  fact,
char  trans,
lapack_int  n,
lapack_int  nrhs,
const double *  dl,
const double *  d,
const double *  du,
double *  dlf,
double *  df,
double *  duf,
double *  du2,
lapack_int ipiv,
const double *  b,
lapack_int  ldb,
double *  x,
lapack_int  ldx,
double *  rcond,
double *  ferr,
double *  berr,
double *  work,
lapack_int iwork 
)

Definition at line 36 of file lapacke_dgtsvx_work.c.

44 {
45  lapack_int info = 0;
46  if( matrix_layout == LAPACK_COL_MAJOR ) {
47  /* Call LAPACK function and adjust info */
48  LAPACK_dgtsvx( &fact, &trans, &n, &nrhs, dl, d, du, dlf, df, duf, du2,
49  ipiv, b, &ldb, x, &ldx, rcond, ferr, berr, work, iwork,
50  &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  double* b_t = NULL;
58  double* x_t = NULL;
59  /* Check leading dimension(s) */
60  if( ldb < nrhs ) {
61  info = -15;
62  LAPACKE_xerbla( "LAPACKE_dgtsvx_work", info );
63  return info;
64  }
65  if( ldx < nrhs ) {
66  info = -17;
67  LAPACKE_xerbla( "LAPACKE_dgtsvx_work", info );
68  return info;
69  }
70  /* Allocate memory for temporary array(s) */
71  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
72  if( b_t == NULL ) {
74  goto exit_level_0;
75  }
76  x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,nrhs) );
77  if( x_t == NULL ) {
79  goto exit_level_1;
80  }
81  /* Transpose input matrices */
82  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
83  /* Call LAPACK function and adjust info */
84  LAPACK_dgtsvx( &fact, &trans, &n, &nrhs, dl, d, du, dlf, df, duf, du2,
85  ipiv, b_t, &ldb_t, x_t, &ldx_t, rcond, ferr, berr, work,
86  iwork, &info );
87  if( info < 0 ) {
88  info = info - 1;
89  }
90  /* Transpose output matrices */
91  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
92  /* Release memory and exit */
93  LAPACKE_free( x_t );
94 exit_level_1:
95  LAPACKE_free( b_t );
96 exit_level_0:
97  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
98  LAPACKE_xerbla( "LAPACKE_dgtsvx_work", info );
99  }
100  } else {
101  info = -1;
102  LAPACKE_xerbla( "LAPACKE_dgtsvx_work", info );
103  }
104  return info;
105 }
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
void LAPACK_dgtsvx(char *fact, char *trans, lapack_int *n, lapack_int *nrhs, const double *dl, const double *d, const double *du, double *dlf, double *df, double *duf, double *du2, lapack_int *ipiv, const double *b, lapack_int *ldb, double *x, lapack_int *ldx, double *rcond, double *ferr, double *berr, double *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
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